TECHNICAL FIELD
[0001] The invention generally relates to the field of tire pressure monitoring
5 systems (TPMS). The invention is particularly useful in installing and servicing TPMS
sensors on automotive vehicle wheels.
BACKGROUND
[0002] The inclusion of tire pressure monitoring systems (TPMS) for light
10 passenger vehicles was enacted into law in the United States in 2007 and Europe in 2012.
Millions of US and European passenger vehicles now include these sensors which require
service and replacement over time. TPMS systems are important vehicular. safety systems
and use has expanded beyond passenger vehicles from over the road trucks to motorcycles.
[0003] A common forin of TPMS sensor includes a sensor that is connected to the
15 tire valve stem and is mounted to the inside of a vehicle wheel or rim exposed to the
pressurized air interior of the vehicle tire. Common forms of these sensors include a
clamp-type mounting and a snap-on mounting.
[0004] In servicing these TPMS sensors, service garages often had to use several
distinct and different tools to disassemble, remove and replace worn or damaged TPMS
20 sensors. Prior tools or tool kits included a torque wrench, a valve stem wrench, grommet
wre~ch, a screw driver and specialty driver sockets and bits in order to remove or replace
the sensors. If one or more of these tools was temporarily misplaced or lost, a technician
would have to find or purchase a replacement which is costly and increases the time to
conduct the TPMS repair or replacement.
25 [0005] With TPMS mandated for passenger vehicles, many companies have entered
the commercial market with competitive TPMS sensors. These competitive sensor
manufacturers design and manufacture TPMS sensors to their own specifications depending
on the features and performance specifications required by the vehicle original equipment
manufacturer (OEM) customer. For example, a TPMS sensor manufacturer may sell
30 several lines ofTPMS sensors which have different constructions, installation instructions,
programming protocols, communication protocols and functional features.
[0006] . The number of different TPMS sensor manufacturers and available sensors
generates do?:ens and dozens of different TPMS sensors for service garage technicians.
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When a TPMS-equipped vehicle enters a service garage, a lot of time is traditionally spent
by technicians to determine what type ofTPMS sensor was originally installed on the
vehicle or specified by the OEM. Once the proper TPMS sensor is identified, technicians
traditionally would then have to research odook-up the proper installation instructions and
5 specifications, for example the recommended installation torque, to install the replacement
TPMS or reinstall the existing TPMS sensor. In some instances and/or in the interest of
saving time, technicians may simply apply an installation torque based on the technician's
experience due to the burden and effort to research, for example, installation torque
specifications for a particular brand and model of TPMS sensor. This can result in damage
10 to the TPMS sensor or a less than optimal installation of the sensor.
[0007] There is a need to provide a multi-functional TPMS sensor tool which
integrally includes most, ifnotall, of the tools typically needed to remove and replace
common TPMS sensors and associated valves which will increase the speed and efficiency
of technicians working on these TPMS devices. This is further a need for a TPMS tool that
15 includes a database of TPMS sensor makes, models, year reference torque specifications
and other information that a technician can quickly access and display on a screen for rapid
identification of sensor information and then proper installation using the same tool.
BRIEF SUMMARY
20 [0008] A multi-functional TPMS torque tool is disclosed and illustrated below.
One example of the tool includes an electronic control unit for the storage and access of
reference TPMS sensor information, for example recommended reference torque force
specifications for the TPMS sensor fasteners. A user interface allows a technician to
access, manipulate and display stored TPMS sensor information for rapid identification of
25 the proper TPMS sensor and reference specifications for use by the torque tool in the
service or replacement of TPMS sensors.
[0009] In one example, the tool measures the torque applied through the torque
driver, compares that to the stored reference torque specification value for the selected
TPMS sensor and alerts the technician when the stored recommended torque has been
30 achieved or exceeded.
[00 1 0] In another example, the torque tool can receive reference TPMS sensor
information and torque values from a remote device, for example a hand-held TPMS
diagnostic tool.
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[0011] In another example, the tool includes a torque wrench operable for both
common TPMS sensor fasteners, a nut or bolt. In another example, the tool may include
additional devices including a gasket or grommet tools and a valve core wrench~
[0012] The present inventive tool provides numerous advantages and improvements
5 over prior devices and processes which increases the accuracy, safety and efficiency of
service on TPMS valve systems.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The description herein makes reference to the accompanying drawings
1 0 wherein like reference numerals refer to like parts throughout the several views, and
wherein:
[0014]
[0015]
[0016]
Fig. 1 is a perspective view of one example of a multi-function TPMS tool;
Fig. 2 is an plan view of the tool in Fig. 1;
Fig. 3 is an example of a conventional TPMS clamp-type valve;
15 [00 17] Fig. 4 is an example of a conventional TPMS snap-in-type valve;
[00 18] Fig. 5 is an enlarged perspective view of one end of a valve stem including a
grommet for use in the clamp-type valve in Fig. 3;
[0019] Fig. 6 is an exploded view of the example tool in Fig. 1 in use with a bit and
a socket;
20 [0020] Fig. 7 is a bottom view of the tool in Fig. 1;
[0021] Fig. 8 is an exploded view of an example of a screw driving device useful
with the tool in Fig. 1.
[0022] Fig. 9 is a partial perspective end view of the tool in Fig. 1;
[0023]
25 [0024]
Fig. 10 is schematic of an electronic control module for the tool in Fig. 1;
Fig. 11 is flow chart of an example of a menu hierarchy for use with a user
interface for the tool in Fig. 1; and
[0025] Fig. 12 is flow chart of an example of a method for installing a TPMS
fastener through a torque tool.
30 DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION
[0026] Referring to Figures 1- 12, examples of a multi-function TPMS torque tool
10 and methods of use are disclosed and illustrated. The device and methods are
particularly useful in assembling and disassembling direct TPMS valve assemblies in
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modern passenger vehicles equipped with tire pressure :monitoring systems (TPMS)
although there may be other uses or applications known by those skilled in the art.
[0027] The exemplary tool 10 is particularly, but not exclusively, useful for
removing or installing clamp-type TPMS valves14 generally shown in Fig. 3 and snap-in-
5 type TPMS valves 20 as generally shown in Fig. 4. Referring to Figs. 3 and 4, the clamp
and snap-in TPMS valve assemblies generally include a sensor 24 which is mounted on the
inside of a wheel rim (not shown) within the pressurized tire interior once a tire is installed.
[0028] As best seen in Figs. 3-5, the clamp and snap-in valves generally include a
grommet assembly 28 having a grommet 30 which connects to the sensor and seals a valve
1 0 stem opening in the tire rim to prevent loss of pressurized air from the tire. Referring to
Figs. 3 and 5, the clamp-type sensor grommet assembly 28 rhay include a ball and socket
joint with the sensor 24, the ball 36 on the end of the grommet assembly and a socket (not
shown) formed in the sensor 24 housing_ as generally seen in Fig. 3. A screw, bolt or
threaded fastener 38 is typically used to secure the sensor 24 to the grommet assembly 28,
15 valve stem assembly and tire rim (not shown). A nut 34 is used to further secure the valve
stem 44 and sensor 24 to the rim and axially compress the grommet 30. In the snap-in-type
sensor shown in Fig. 4, a different ball 40 and socket 42 arrangement is used generally as
shown.
[0029] As best seen in Figs. 3-5, each of the clamp 14 or snap-in 20 valves include
20 a valve stem 44 which is connected to the grommet assembly 28 and serves as the entry or
exit of pressurized air in the vehicle tire mounted on a rim. The valve stem 44 generally
includes a hollow needle valve (not shown) having threaded portion 46 inside which is
mounted a removable air valve core (not shown). A removable cap 60 is threaded onto the
exterior threaded portion 46 of the valve stem as generally shown. Once installed, the
25 valve stem 44 is airtight with the wheel rim and the sensor 24 monitors tire conditions and
typically communicates the conditions to the vehicle electronic control unit (ECU) for
display to a vehicle driver.
[0030] Referring to Figs. 1 and 2, an example of a multi-function TPMS torque tool
10 is shown. In the example, tool10 includes a tool body 74 and a tool head 80 extending
30 along a longitudinal axis 84 as generally shown. Tool body 74 preferably includes an
elongate handle 90 having a hand-grip portion 96. Hand grip portion 90 is shown as
permanent elastomeric inserts which provide a sure frictional and cushioning surface to a
user's hands. It is understood that other grip 96 features can be used; for example integrally
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molded knurled areas into the material that forms handle 90. Other grip portions 96 and
techniques known by those skilled in the art may be used.
[0031] In the example, a removable end cap 100 threadingly engages a threaded end
of the handle 90. An internal storage cavity (not shown) for tool bits or other accessories as
5 further described below may be included in tool body 74. Tool body 74 is preferably made
from a polymeric material suitable for an industrial automotive service garage environment.
Other materials known by those skilled in the art may be used.
[0032] In a preferred example best shown in Figs. 2 and 9, tool10 further includes a
gasket or grommet removal device 104 molded or otherwise fixedly secured into the handle
10 90 as generally shown. Device 104 is useful, for example, forcibly inserting device 104
between a grommet 30 and the adjacent components to separate and disassemble the valve
stem 44 shown in Figs. 3-5. Devices other than grommet removal device 104, useful for
other purposes, may be used as known by those skilled in the art.
[0033] Tool 10 further includes a user interface 106 preferably in the form of a
15 visual display 110 including a keypad 116 contained within a housing 112 as generally
shown. Visual display 11 0 can be one of many available electronic, highly visible display
devices for example an organic light emitting diode (OLED), light emitting diode (LED), a ~
liquid crystal display (LCD), or other visual display device for producing textual, graphic
and symbolic images visible to the human eye. Visual display 110 can be connected to a
20 circuit board included as part of an electronic control system discussed further below. In a
preferred example, the user interface further includes an alert device, for example an
audible signal or alarm, to alert a user the referenced or recommended torque force has
been achieved discussed further below.
[0034] The display 110 may be used to provide textual and graphic information to a
25 user on the status of the tool, TPMS sensor reference information and conditions of the tire
and surrounding environment. As best seen in Fig. 11, tool display 11 0 may include one or
more preprogrammed and stored menus or graphic user interfaces (GUI's) 118 and/or
provide a single view of certain characteristics or features including notices or alerts that:
the tool 10 is ready to use, a graphic or text of the torque force that is being applied, the tool
30 is waiting to receive infrared (IR) information and/or has received IR information, battery
condition, the tool is in "manual" mode, the tool has malfunctioned, environmental
temperature and other factors and conditions known by those skilled in the art.
[0035] Exemplary keypad 116 includes up and down buttons 120 and a return
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button 124 for navigating preprogrammed menus to selected menu options for executing
selected functions as further described below .. In one example, a validation button 130 is
included as further described below. It is contemplated that visual display 110 may be a
touch sensitive or responsive screen which may reduce or eliminate the need for a keypad
5 116 to navigate the GUis 118.
[0036] In a preferred example, user interface 106 further includes a mini-USB port
138 in the side of the user interface 106 as generally shown. USB port 138 is in electronic
communication with an electronic control device as described below for the importing and
exporting of data, programs and instructions, for example to update the software or
10 firmware of the electronic control device or the reference torque value or other data stored
in the electronic control unit. Other transfers of data, instructions and communications to
and from user interface 106 known by those skilled in the art may be used. The transfers
and exchanges of information or data can be done through the USB port or wirelessly
through transmitters and receivers in the electronic control unit discussed further below.
15 [003 7] A battery (not shown) used to provide power to user interface 106 may be
removably stored in an accessible compartment on the backside oftheuser interface. The
· battery can be disposable, rechargeable or another form of power source known by those
skilled in the art. An alternating current (AC) port (not shown) can also be included to
charge a rechargeable battery, for example. In less sophisticated models, the tool 10 may
20 simply be powered by an AC power cord through the described AC port.
[0038] As best seen in Fig. 7, exemplary tool10 user interface 106 preferably
includes one or more accessory compartments 134 in the housing 112 for storing extra
screw driving bits or other tool 1 0 accessories. Compartments 134 preferably include a
hinged door or removable cover plate to close compartment 134 to house bits or other
25 accessories useful to tool 10. In an alternate example, magnets (not shown) are connected
to or embedded in housing 112. The magnets provide an attractive force to keep screw
driving bits, sockets or accessories described below integral with tool 10. Alternately, tool
end 100 may open to an interior storage area inside the handle 90. Other ways to secure
bits to accessories, for example a channel with an interference fit with the bit, known by
30 those skilled in the art may be used.
[0039] In a preferred example of tool 10, head 80 includes a manual torque driver
150 as generally shown. The exemplary torque driver 150 is useful for properly applying a
specified torque (Newton Meters (N-m)) or Inch Pounds (in-lbs)) to mechanical fasteners
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such as TPMS sensor screws 3 8 as described above. Due to the nature and safety functions
of TPMS, it is important that the sensors 24 are properly secured to the vehicle wheel using
specified torques.
[0040] , In the example, driver 150 includes a chuck 154 defining a through hole 166
5 through head 150 along a lateral axis 156. In a preferred example, chuck 154 defines a
hexagonal, six-sided chuck or receiving circumferential surface for receipt of hexagonal
shaped bits or accessories described below. Chuck 154 may be magnetic or include other
devices, for example spring biased ball bearings (not shown), to deter unwanted
disengagement of a tool or bit from chuck 154. It is understood that chuck 154 can take
10 other shapes, forms and orientations with respect to head 150 and tool 10 as known by
those skilled in the art.
[0041] In a preferred example, chuck 154 includes an internal ratchet mechanism
(not shown). The ratchet mechanism allows the contact hexagonal surface of the chuck
engaged with the bit holder 160 to remain rotationally fixed when force is applied to the bit
15 holder 160 in a clockwise direction about axis 156 to tighten a TPMS screw 38 or nut 34,
for example. The ratchet mechanism allows the chuck bearing surface to rotate about axis
156 when the handle 90 is rotated in a counter-clockwise. direction to recover the angular
displacement covered on a clockwise tightening movement so another clockwise tightening
movement can be executed for rapid tightening of the TPMS fastener. A reverse switch or
20 lever(not shown) may be employed to reverse the ratchet device so that the chuck bearing
surface is fixed when force is applied to the handle in the counterclockwise direction. In
one example a spring-loaded gear and pawl mechanism may be used for the internal ratchet
mechanism. Other known ratchet devices used in common handtool sockets and other
similar devices known by those skilled in the art may be used. In an alternate example,
25 chuck 154 does not include a ratchet mechanism and is fixed in position with respect to the
head 70 like a box-end wrench.
[0042] In the example head 150, head 150 is preferably made from a ferrous or nonferrous
metal which from the soiid head 80 extends in the form of a hollow rod into a
portion of the body: 70 along the longitudinal axis and most preferably the full length of the
30. handle 90 to the end cap 100. Other materials, constructions and configurations for head
150 known by those skilled in the art may be used.
[0043] In the example, a strain gauge (not shown) is attached to a portion of the
head 150 extending into the body portion 74 as described above. A transducer generates a
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signal which is calibrated and converted to the selected unit of torque (N-m) or (in-lbs.) in
the electronic control device described further below. Other components and methods used
to measure the torque force applied at the head 150 and chuck 154 of tool 10 about lateral
axis 156 known by those skilled in the art may be used.
5 [0044] As best seen in Figs. 1 and 6, tool 10 preferably includes a bit holder 160
which is slidingly and frictionally engaged by chuck 154. Bit holder 160 includes a first
end 164 and a second end 168. Bit holder 160 preferably includes an elongate bore 166 in
one end of an elongate shaft 170 as generally shown. In a preferred example, bore 166 is
defined by a hexagonal, six sided circumferential surface. Shaft 170 is preferably a
10 hexagonal, six-sided configuration that is complementary to chuck 154 to prevent rotation
of holder 160 relative to chuck 154 thereby applying a torsional force to holder 160 on
rotation of the handle 90 about lateral axis 156. In the example holder 160, shaft 170
further includes a stop 172 in the form of a radially extending annular ring which is larger
in diameter than chuck hole 158 to prevent holder 160 from passing through hole 158.
15 Holder 160 is preferably made from hardened steel. Other materials, constructions, forms
and configurations for holder 160 known by those skilled in the art may be used.
[0045] As best seen in Fig. 8, tool 10 preferably includes a screw driving bit 186
having a shaft 188, a driving tip 190 and an accessory end 192 opposite the driving tip 190
as generally shown. Shaft 188 preferably has a hexagonal, six sided exterior shape for
20 cooperative sliding and frictional engagement with holder 160 bore 166 to prevent rotation
of driving bit 186 relative to the holder when the holder is rotated about lateral axis 156.
Driving tip 190 is preferably a 5-point or Torx® bit of a size commonly used with TPMS
screws 38 as shown in Fig. 3. It is understood that tip 190 may take other forms for
engaging screws, bolts or other fasteners, for example cross or phillips head, slot head,
25 allen or hex-key wrench and other engagement forms known by those skilled in the art.
[0046] In the exemplary driving bit 186, accessory end 192 is preferably a narrow,
cylindrical extension of shaft 188 as generally shown. It is understood that other
constructions, forms and configurations for accessory end 192 may be used as known by
those skilled in the art.
30 [0047] Screw driving bit 186 may alternately, or as a separate bit, take the form of
multi-purpose air valve core wrench on one end and a an accessory end 192 as described
above on the other. The bits may have engagement devices, for example spring-biased
steel balls or bearings (not shown), which engage with existing slots or depressions in the
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valve core body. Other engagement or securing methods, for example magnetic, known by
those skilled in the art may be used.
[0048] Other driver bits, for example flat head, phillips head and others common to
TPMS sensors known by those skilled in the art may be used. Driving bit 186, and other
5 bits and accessories contemplated herein, may be made from hardened steel or other
materials suitable for the application.
[0049] As best seen in Figs. 1, 6, 7 and 8, tool10 may include a socket 176 for use
in engaging and applying a selected torque force to a nut, for example a TPMS valve nut 34
as shown in Fig. 3. In the example, socket 176 preferably includes a first end 178 in the
10 form of an 11 millimeter (rnrn) hex-head socket and a second end 180 in the form of a
12rnrn hex-head socket. A body portion182 is positioned between the first and second ends
and includes an internal bore defined by a multi-faceted hexagonal, six-sided
circumferential surface complementary to the exterior of holder 170 shaft 170.
· [0050] As best seen in Figs. 6 and 8, socket 176 slidingly and frictionally engages
15 holder 160 which slidingly engages chuck 154 to provide a torque force on a fastener
engaged with an appropriate end 178 or 180 of socket 176. As shown in Fig. 8, alternately,
the socket 176 can serve as a handle or grip for a user to hand-tighten a screw using driving
bit 186 as generally shown. Once hand-tight, the socket can be removed from holder 160
and holder 160 can be engaged with chuck 154 and a torque applied with tool 1 0 as
20 described further below. It is understood that socket 176 can take other forms,
configurations and constructions as known by those skilled in the art.
[0051] Referring to Fig. 10, an example of an electronic control unit or system 200
for tool 10 and visual display 110 is illustrated. The example control system 200 includes a
microprocessor or central processing unit 204, a data or computer memory storage device
25 210, sensors 214 which may include the torque sensor or measurement device described
above, input and output ports and devices 218, user interfaces 220 which may include user
interface 106 and .display device 110 described above, and transmitters and/or receivers 222 ·
which may be used for sending and receiving signals and electronic or digital data
electronically through cables or wirelessly to other devices.
30 [0052] Control unit 200 memory storage device 210 may be a permanent memory
device, such as a hard drive, or a temporary storage device such as a flash memory device
capable of storing data, programmed software and/or instructions for execution and
processing by the processor 204. In a preferred example further discussed below, memory
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storage device 21 0 stores one or more databases including TPMS systems and sensor
reference information, for example, different brands and types of TPMS sensor valve
assemblies and sensors and the recommended torque specifications for installation of each
valve. Other databases, data and information for TPMS components and other systems and
5 devices known by those skilled in the art may be stored in tool 10 control unit 200.
[0053] A programmable controller (not shown) may be used in system 200 to
control and direct the activity and flow of data and instructions between the control unit
200 devices. In one example, pre-programmed instructions are stored in the memory
storage device 210 and executed by the processor 204 when predetermined actions or
10 conditions occur.
[0054] The control unit transmitter/receiver 222 may be used to communicate with
independent devices, for example, a conventional, hand-held TPMS tool 226 or personal
computer (not shown) commonly used in service garages. A suitable example of a handheld
TPMS device is the ATEQ VT -56 manufactured by ATEQ Corporation. Tools 226
15 typically have the capability to communicate with TPMS sensors 24 by wirelessly sending
and receiving signals and data to and from the tool 226 and sensor 24. For ·example, tool
226 and tool 10 may communicate by one or more wireless protocols for example
Bluetooth, Wi-Fi, GSM, cellular, and other networks such as local area networks (LAN),
wide area networks (WAN), personal area networks, L TE and other wireless
20 · communication protocols and communication networks known by those skilled in the art.
Cable connections such as RS232, Ethernet and other transmission devices known by those
skilled in the art may be used. Other hardware, software, protocols, networks and other
devices and techniques for communicating data known by those skilled in the art may be
used .. In a common exchange of signals and information, when a vehicle equipped with
25 TPMS enters a service facility, a technician will use tool 226 to send a signal to each TPMS
wheel sensor to "awaken" the sensors 24 which do not continuously send signals to
conserve the sensor's internal battery life. Once alerted, the sensors 24 send data signals
with some fundamental information, for example, a particular sensor identification number
and the type or manufacturer of sensor, so the technician knows what sensors are in use on
30 the vehicle.
[0055] In a preferred example of tool 10, tool 10 transmitter/receiver 222 is an
infrared (IR) receiver and transmitter. In one example of tool 10, tool 10 may receive and
send signals and data to tool 226, the wheel TPMS sensor 24 or other devices. Tool 10
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may use other wireless communication protocols, for example Bluetooth, to transmit and
receive signals and data known by those skilled in the art.
[0056] The exemplary devices illustrated in Fig. 11 are all, or selectively in
electronic communication with each other through a bus 224, circuit board (not shown) or
5 other component(s) or mechanisms known by those skilled in the art. It is understood that
additional devices may be used in control unit 200 to achieve the functions and objectives
described herein as known by those skilled in the art.
[0057] Referring to Fig. 11, examples of tool 10 graphic user interfaces (GUis) 118
are illustrated. In a preferred tool 10, different modes of operation and retrieval of
10 reference data or information from the control unit 200 are provided. Tool 10 preferably
includes a manual mode 234 where preprogrammed reference torque specifications for a
particular TPMS sensor are not retrieved and the tool is used as a traditional torque wrench.
In one example, a user may select or input a maximum torque force value 236 into the .
visual display 110 using the keypad 116. The validate button 130 may be pressed to enter
15 the value and establish a new threshold or maximum torque value 238. When torque is
applied through the head 80 torque driver 150, an alert signal, for example an audible beep
or a vibration in the tool generated by a vibratory device, may be used to alert the user that
the threshold torque has been reached or exceeded to prevent over-tightening of the TPMS
sensor screw 38, nut 34 or other fastener, for example.
20 [0058] In another example of a GUI 118 for tool 10 is identification of the TPMS
sensor 24 through the make and model year of the vehicle 240. In the example, a user may
navigate a list of vehicle manufacturers through the keypad 116 and visual display 110 to
select the vehicle manufacturer 246, the vehicle model250 and the year the vehicle was
manufactured 254. On these selections, the control unit 200 searches in the memory device
25 21 0 and identifies the reference information on TPMS sensors 24 that were originally
installed when the vehicle was manufactured or approved replacements. In an optional step
258, a visual image or photograph of the sensor 24 may be displayed for further recognition
and verification of the proper sensor 24 to be used. In one example, additional information
about or from the OEM 260 may be retrieved or automatically displayed. This may include
30 recall notices, service bulletin information etc.
[0059] Exemplary GUI 118 may include aTPMS valve mode 270. In mode 270,
the user may search for information or specifications by the known specific TPMS sensor
24. For example, a reference list of all of the commercially sold TPMS sensors 274 by
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brand or by model number may be stored in memory storage device 210. A user can
navigate the GUI ·118 to retrieve and review a list of the commercially available sensors by
model number, brand name, visual image of the different types of valve assemblies, for
example clamp or snap-in, or other indicator to find the particular sensor removed from the
5 vehicle or a new sensor that is ready for installation. On identification, an optional step 280
may display a visual image of the chosen sensor as described above. In exemplary step
284, a user may access additional information beyond reference torque specifications that is
stored in the memory storage device.
[0060] Exemplary GUI 118 may include a TPMS sensor brand mode of operation
10 290. In the example, a user may search for TPMS sensor information by choosing a brand
from a list ofbrands/companies stored in the memory storage device 210. A list of sensors
294 by a chosen brand or source may be retrieved from memory and displayed. On
selection of a brand, an option to input or select the type of sensor 298, for example clamp
or snap-in, may be made and an image of the selected type or both may be displayed 300.
15 The user may further access additional information about the selected sensor 304 as
described above.
[0061] The exemplary GUI 118 may further provide a settings menu or screen to
customize or change settings or preferences for the tool 10. For example, a user may want
to change the units of torque forces displayed from newton-meters (N-m) to inch-pounds
20 (in-lbs.). Other settings and preferences oftool10 known by those skilled in the art may be
used.
[0062] It is understood that different GUis 118 and different options or available
menus may be used as known by those skilled in the art.
[0063] Referring to Figure 12, an example of a process 400 for using the tool 10 to
25 apply a specification torque force on an exemplary TPMS sensor and valve assembly 24 is
illustrated. In the example, tool 10 is turned on in step 410. This can be achieved, for
example, through an on/off power button (not shown), switch or other activation action or
process known by those skilled in the art. On tool 10 power turn on, an initial start-up GUI
118 is preferably displayed on visual display 110.
30 [0064] At optional step 415, a user can choose through the GUI 118 whether to
operate the tool 10 in a manual mode similar to a traditional torque wrench operation as
described above. ·In one example of manual operation, the user to manually input or choose
an acceptable or m~imum torque force to be applied, establish that value as the threshold
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by pushing the validation button 130 which stores the threshold value. On an applied
torque by head 80 on a screw 38 or nut 34 of a value equal to the threshold value, an
audible beep or other alert by a speaker (not shown) in housing 112 may be used to signal
the user that the threshold value has been achieved. Alternately, or in addition to an audible
5 alert, a visual alert may be produced on the visual display 110, for example a flashing
screen.
[0065] Alternately and preferably, in step 420 the tool 10 is used to identify the
proper or appropriate TPMS sensor and valve assembly 24 for the vehicle of interest.
Referring to Fig. 11, ·this may be done by at least three different ways or modes through
10 visual display 110. For example, the vehicle TPMS sensor can be identified through input
and/or selection through the GUI 118 using the vehicle make, model and year 240;
selection from a listofTPMS valve types 270 or selection from a list of reference TPMS
valves by brand or source 290 as described above. Alternately, the tool 10 can receive
signals or data identifying the TPMS valve from the vehicle TPMS sensor itself, the vehicle
15 electronic control unit (ECU), from a hand-held TPMS tool226 or from another device (not
shown), through wireless transmission means or electronic transfer of data, for example a
USB cable through USB port 138. For example, TPMS tool226 may identify a TPMS
sensor make and model through receipt of signals and data from the TPMS sensor 24 or the
vehicle electronic control unit. Alternately, tool 226 may optically scan a bar code or other
20 indicia on the a TPMS sensor 24 or valve assembly visible on the sensor itself once
removed from the wheel or from a sensor 24 packaging or labeling in the example of a new
sensor to be installed. The tool 226 can transmit the received or read sensor 24 data to the
tool 10 for receipt through tool 10 receiver 222 and into the control unit 200 for processing
consistent with the methods described herein.
25 [0066] In step 430, the proper exemplary reference torque force or specification is
retrieved and preferably displayed on visual display 110. In a preferred method described
above, the tool 10 memory storage device 210 stores a database of reference torque force
values or ranges as recommended by the TPMS valve manufacturer, vehicle OEM or as
established by industry. As described above, a visual image of the TPMS valve sensor 24
30 may be displayed on visual display 110. It is understood that other specification values
other than torque force may be stored, retrieved and displayed in a similar manner by tool
10 to suit the tool 10 and the particular application.
[0067] In an alternate of step 430 (not shown), the tool1 0 may receive the proper
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TPMS valve assembly reference torque specification value or values from an independent
or remote device, for example a personal computer or TPMS hand-held tool 226. In the
example, the independent tool 226 may store in a memory storage device the reference or
recommended torque values and ranges in an information database or repository and
5 selectively transfer that reference torque value specification or data to the tool 10 for receipt
by receiver 222 and processing in control unit 200 as described above.
[0068] In step 440, the tool 10 is configured for the appropriate work or task on the
TPMS valve assembly, for example tightening a TPMS valve assembly to a wheel rim. In
two examples described above, either a screw driving bit 186 or a socket 176 is installed in
10 tool head 80.
[0069] Referring to Figs. 1, 6 and 8, if a torque force is to be applied to a screw or
bolt 38, an appropriate screw driving bit 186 is preferably inserted into holder 60 as best
seen in Fig. 8. In an optional step not shown, a user can also engage a socket 176 on the
other end of the holder 160 and use the assembly to start threading screw 38 into the valve
15 assembly and tighten the screw 38 to a low torque by hand. Alternately, holder 160 can be
installed into head 80 through chuck 154as best seen in Fig. 8. In the holder 160 installed
position, holder 160 is rotatably fixed relative to chuck 154 about axis 156 preventing
relative rotation between head 80 and holder 160.
[0070] In step 450, bit 186 tip 190 is then engaged with screw 38 and a torque force
20 is applied through rotation of tool handle 90 about lateral axis 156. The tool internal torque
sensor measures the applied torque, and the control unit 200 converts the measured force
data to a numerical value and registers or stores the measured torque in the tool electronic
control unit 200. The measured torque is compared to the stored reference-torque value or
range· for the selected TPMS valve and a determination is made in control unit 200 whether
25 or not the measured torque is equal to or exceeds the specified or threshold reference torque
value. If the measured torque is equal to or exceeds the stored threshold reference to!que
value the user is preferably alerted in a manner described above. In a typical, but not .
exclusive range, the specified TPMS valve assembly torque values for screw will range
between 0.1- 5 Newton-meters (N-m) for TPMS valve assembly screws and between 5-
30 8.5 Newton-meters (N-M) for TPMS valve assembly nuts. It is understood that torque
values above and below this range may be used with, or applied by, tool 10. In one
example, depending on whether the identified sensor 24 is a clamp or snap-in type of valve
assembly, the tool 10 can establish or default to a range of torque values to use as the
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default or display due to knowing the general construction of the sensor 24 being serviced.
Other comparisons of data or alerts to the user may be made depending on the application
as known by those skilled in the art.
[0071] If a specified torque is to be applied to TPMS valve nut 24, socket 176 is
5 alternately engaged with holder 160 as best seen in Fig. 6. A similar process is used to
apply at torque to the nut 34, measure the applied torque, compare the measured torque to
the threshold reference torque value and provide an alert as described above for screw
driving bit 186. Use of holder 160 and socket 176 to first hand tighten a nut prior to
engagement of holder 160 to chuck 154 is also contemplated similar to that described above
10 for screw driving bit 186.
[0072] In an exemplary step (not shown), when the holder 160, socket 176 and
screw driving bit 186 are not in use, these may be stored in the tool10 compartment 134.
Alternately, these bits may be secured to the tool body 74 through magnets in the housing
112 or handle 90 as previously described.
15 [0073] In an alternate step (not shown), tool10 may also be used to loosen a
secured TPMS valve screw 38, nut 34, other fastener. In one example using Fig. 6 as a
guide, the tool body 74 is rotated 180 degrees about longitudinal axis 84 so the visual
display 110 is pointed downward. Holder 160 and the appropriate engaged socket or bit is
then installed from the underside of the rotated head into chuck 154 as previously
20 described. In this orientation, rotation of tool handle 90 about axis 156 loosens a fastener
engaged with the bit or socket. Other methods for using tool1 0 to loosen a fastener known
by those skilled in the art may be used.
[0074] In an alternate step not shown, tool10 grommet tool104 may be used to
dislodge or remove valve assembly grommet 30 from the remaining components of the
25 valve assembly. The too1104 may also be used to install or seat a grommet or other gasket
or component.
[0075] The examples oftoollO provide a highly useful, multi-functional tool that is
particularly useful for servicing and installing TPMS valve assemblies. The tooll 0
improves and solves existing problems and disadvantages with prior tool kits and systems
30 and provides a faster, more efficient and safer solution for technicians, service garages and
end users of the vehicles.
[0076] While the invention has been described in connection with what is presently
considered to be the most practical and preferred embodiment, it is to be understood that
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the invention is not to be limited to the disclosed embodiments but, on the contrary, is
intended to cover various modifications and equivalent arrangements included within the
spirit and scope of the appended claims, which scope is to be accorded the broadest
interpretation so as to encompass all such modifications and equivalent structures as is
5 permitted under the law.

What is claimed is:
1. A multi-functional tire pressure monitoring system (TPMS) torque tool for
use in servicing TPMS sensors on vehicle wheels, the tool comprising:
an elongate tool body having a longitudinal axis;
a torque driver positioned on one end of the tool body having a chuck positioned.
transverse to a lateral axis;
a torque sensor connected to the tool body operable to measure a torque force
applied by the chuck about the lateral axis to a TPMS sensor fastener;
an electronic control unit connected to the tool body, the electronic control unit
10 having a memory storage device for storing at least one reference TPMS sensor fastener
torque value; and .
a user interface connected to the tool body in electronic communication with the
torque sensor and the electronic control unit, the user interface operative to alert a user
when the measured TPMS sensor fastener torque value is equal to or exceeds the stored at
15 least one reference TPMS sensor fastener torque value.
2. The tool of claim 1 further comprising:
a bit holder having an elongate shaft, a first end removably engaged with the chuck
and a second end opposite the first end.
3. The tool of claim 2 further comprising:
a screw driving bit removably engaged with the first end of the bit holder;
and
a socket removably engaged with the second end of the bit holder, the screw
25 driving bit and the socket selectively engagable with a respective TPMS sensor screw and a
nut.
4. The tool of claim 3 wherein the bit holder first end defines a multi-faceted
elongate bore along the lateral axis, the screw driving bit slidingly received within the
30 elongate bore preventing rotation of the screw driving bit relative to the bit holder about the
lateral axis.
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5. The tool of claim 3 wherein the socket further comprises a body and a first
end and a second end on opposing sides of the body, the first end comprising a TPMS
sensor fastener receiving socket of a first size and the second end comprising a TPMS
sensor fastener receiving socket of a second size, the second size a different size than the
5 first size, the socket body defining a multi-faceted bore along the lateral axis for sliding
engagement with the bit holder shaft preventing rotation of the socket relative to the bit
holder about the lateral axis.
6. The tool of claim 1 wherein the at least one reference TPMS sensor fastener
1 0 torque value comprises a plurality of reference TPMS sensor fastener torque values
organized in a database stored in the tool memory storage device.
7. The tool of claim 6 further comprising:
an information database comprising a plurality ofTPMS sensor information stored
15 in the tool memory storage device; and
20
25
30
an information database comprising a plurality of TPMS sensor brand information
stored in the tool memory storage device.
8. The tool of claim 1 wherein the user interface further comprises:
a visual display;
a graphic user interface positioned on the visual display operable to retrieve the
stored at least one reference TPMS sensor fastener torque value; and
a keypad to navigate the graphic user interface.
9. The tool of claim 8 wherein the graphic user interface comprises:
a manual mode of operation;
a make and model year mode of operation;
a TPMS valve mode of operation; and
a TPMS sensor brand mode of operation.
16. The tool of claim 1 wherein the electronic control unit further comprises a
microprocessor in communication with the memory storage device and the user interface,
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the microprocessor operable to compare the measured TPMS sensor fastener torque value
to the reference TPMS sensor torque value to determine if the alert is needed.
11. The tool of claim 1 wherein the electronic control unit further comprises a
5 signal receiver operative to receive one of a TPMS sensor identification or the reference
TPMS sensor fastener torque value from a remote device.
12. The tool of claim 11 wherein the remote device comprises a hand-held
TPMS tool.
10
13. The tool of claim 1 further comprising a TPMS valve grommet removal
device.
14. A method of installing a tire pressure monitoring system (TPMS) sensor to a
15 vehicle wheel with a multi-functional TPMS torque tool having a tool body including a
torque driver and a user interface connected to the tool body, the TPMS sensor having a
TPMS sensor fastener, the method comprising:
identifying the TPMS sensor to be installed;
retrieving a reference TPMS sensor fastener torque value for the identified TPMS
20 sensor to be installed;
25
configuring the TPMS torque tool torque driver to engage the TPMS sensor
fastener;
applying a torque force to the TPMS sensor fastener through the tool torque driver;
measuring the applied torque force; and
generating an alert through a user interface connected to the tool body when the
measured applied torque force value is equal to greater than the retrieved reference TPMS
sensor fastener torque value.
15. The method of claim 14 wherein the step of retrieving a reference TPMS
30 sensor fastener torque value comprises accessing an information database comprising a
plurality of reference TPMS sensor fastener torque values.