FIELD
The present disclosure relates to the field of tractors.
DEFINITION
Shuttle Lever: The term ‘shuttle lever hereinafter refers to a component used for
changing direction of motion of a vehicle from forward to rearward and 5 nd vice
versa.
Shifter rod: The term ‘Shifter rod’ hereinafter refers to a device that fixes the
position of gears in a power train.
BACKGROUND
10 The background information herein below relates to the present disclosure but is
not necessarily prior art.
Sometimes, an operator accidentally or unknowingly engages shuttle lever of a
tractor while the tractor transmission gears might get engaged due to which the
tractor suddenly starts to move. As a result, there is a probability of accidents
15 which in return may amount to injuries, loss of life and property. Also sudden
engagement or disengagement of gears of the tractors causes high wear and tear
which leads to safety risk, high cost of maintenance, frequent service intervals and
monetary loss.
There is therefore felt a need for an arrangement to prevent accidental actuation of
20 a tractor forward-reverse shuttle lever.
OBJECT
Some of the objects of the present disclosure, which at least one embodiment
herein satisfies, are as follows:
One object of the present disclosure is to provide an arrangement to prevent
25 accidental actuation of a tractor forward-reverse shuttle lever.
3
Another object of the present disclosure is to provide an arrangement that causes
less wear and tear of gears.
Yet another object of the present disclosure is to provide an arrangement that does
requires less maintenance.
Still another object of the present disclosure is to provide an arrangement 5 that is
reliable.
Other objects and advantages of the present disclosure will be more apparent from
the following description, which is not intended to limit the scope of the present
disclosure.
10 SUMMARY
The present disclosure envisages an arrangement to prevent accidental actuation
of a tractor forward-reverse shuttle lever. The arrangement connects the shuttle
lever to the clutch pedal. The arrangement is configured to engage the shifter rod
of the shuttle lever in a released state of the clutch pedal to prevent accidental
15 displacement of the shifter rod. The arrangement is further configured to
disengage from the shifter rod in the depressed state of the clutch pedal to permit
displacement of the shifter rod, and therefore the shuttle lever.
In an embodiment, the arrangement comprises a spring loaded plunger assembly
and a shuttle lock pivot lever. The plunger assembly is engaged with the shifter
20 rod of the shuttle lever. The shuttle lock pivot lever connects the plunger assembly
with clutch pedal. The shuttle lock pivot lever is configured to be displaced when
the clutch pedal is depressed to disengage the plunger assembly from the shifter
rod.
In another an embodiment, the plunger assembly comprises a housing, a plunger,
25 a spring, and a circlip. The plunger is contained in the housing, and is nested in a
shifter rod groove configured in the shifter rod. The spring is attached to a first
4
operative end of the plunger. The circlip is fitted over the plunger. The circlip is
configured to restrict axial movements of the plunger.
In one embodiment, the shuttle lock pivot lever includes a cam and a pivot. The
cam is configured to rotate about the pivot to enable displacement of the plunger.
In another embodiment, the shuttle lock pivot lever is connected to clutc5 h
actuation shaft lever of the clutch pedal by means of an adjustable link.
In still another embodiment, the adjustable link is a shuttle lock tie rod.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
An arrangement, of the present disclosure, to prevent accidental actuation of a
10 tractor forward-reverse shuttle lever will now be described with the help of the
accompanying drawing, in which:
Figure 1 illustrates an isometric view of the arrangement, in accordance with an
embodiment of the present disclosure; and
Figure 2 illustrates an isometric view of the plunger assembly of the arrangement
15 of Figure 1.
LIST OF REFERENCE NUMERALS
100 – Arrangement
104 – Plunger assembly
106 – Shifter rod
20 106A – Shifter rod groove
108 – Shuttle lock pivot lever
108A – Cam
108B – Pivot
5
110 – Clutch pedal
112 – Housing
114 – Plunger
114A – First operative end of plunger
116 – Spr5 ing
118 – Circlip
120 – Clutch actuation shaft lever
122 – Shuttle lock tie rod
124 – Clutch tie rod
10 DETAILED DESCRIPTION
Embodiments, of the present disclosure, will now be described with reference to
the accompanying drawing.
Embodiments are provided so as to thoroughly and fully convey the scope of the
present disclosure to the person skilled in the art. Numerous details, are set forth,
15 relating to specific components, and methods, to provide a complete
understanding of embodiments of the present disclosure. It will be apparent to the
person skilled in the art that the details provided in the embodiments should not be
construed to limit the scope of the present disclosure. In some embodiments, wellknown
processes, well-known apparatus structures, and well-known techniques
20 are not described in detail.
The terminology used, in the present disclosure, is only for the purpose of
explaining a particular embodiment and such terminology shall not be considered
to limit the scope of the present disclosure. As used in the present disclosure, the
forms "a,” "an," and "the" may be intended to include the plural forms as well,
6
unless the context clearly suggests otherwise. The terms "comprises,"
"comprising," “including,” and “having,” are open ended transitional phrases and
therefore specify the presence of stated features, integers, steps, operations,
elements, modules, units and/or components, but do not forbid the presence or
addition of one or more other features, integers, steps, operations, eleme5 nts,
components, and/or groups thereof. The particular order of steps disclosed in the
method and process of the present disclosure is not to be construed as necessarily
requiring their performance as described or illustrated. It is also to be understood
that additional or alternative steps may be employed.
10 When an element is referred to as being "mounted on," “engaged to,” "connected
to," or "coupled to" another element, it may be directly on, engaged, connected or
coupled to the other element. As used herein, the term "and/or" includes any and
all combinations of one or more of the associated listed elements.
The terms first, second, third, etc., should not be construed to limit the scope of
15 the present disclosure as the aforementioned terms may be only used to
distinguish one element, component, region, layer or section from another
component, region, layer or section. Terms such as first, second, third etc., when
used herein do not imply a specific sequence or order unless clearly suggested by
the present disclosure.
20 Terms such as “inner,” “outer,” "beneath," "below," "lower," "above," "upper,"
and the like, may be used in the present disclosure to describe relationships
between different elements as depicted from the figures.
A tractor shuttle lever is used for changing gears from forward direction to reverse
direction at the same speed or with change of speed. Sometimes an operator
25 accidentally engages the shuttle lever and puts the tractor in motion. This results
in accidents. The arrangement (100), of the present disclosure, prevents the
accidental engagement of the shuttle lever and thereby, prevents undesired
movement of the tractor.
7
A preferred embodiment of an arrangement (100) of the present disclosure, to
prevent accidental actuation of a tractor forward-reverse shuttle lever (not
specifically labelled in figures) will now be described in detail with reference to
Figure 1 through Figure 2. The preferred embodiment, does not limit the scope
and ambit of the 5 disclosure.
The arrangement (100) connects the shuttle lever to the clutch pedal (110),
wherein the arrangement (100) is configured to engage the shifter rod (106) of the
shuttle lever in a released state of the clutch pedal (110) to prevent accidental
displacement of the shifter rod. The arrangement (100) is further configured to
10 disengage from the shifter rod (106) in the depressed state of the clutch pedal
(110) to permit displacement of the shifter rod (106), and therefore the shuttle
lever.
The clutch pedal includes a clutch pedal (110), a clutch tie rod (124), and a clutch
actuation shaft lever (120). The clutch pedal (110) is a device that enables clutch
15 to disengage power flow from the engine (not specifically shown in figures) to the
transmission while changing gears of a gear train (not specifically shown in
figures). The clutch tie rod (124) connects the clutch pedal (110) to the clutch
actuation shaft lever (120). The clutch actuation shaft lever (120) is configured to
transmit force applied to the clutch pedal to separate clutch plates that are attached
20 to gear train.
In an embodiment, the arrangement (100) comprises a spring loaded plunger
assembly (104) and a shuttle lock pivot lever (108). The plunger assembly (104) is
engaged with the shifter rod (106) of the shuttle lever. The shuttle lock pivot lever
(108) connects the plunger assembly (104) with clutch pedal (110). The shuttle
25 lock pivot lever (108) is configured to be displaced when the clutch pedal (110) is
depressed to disengage the plunger assembly (104) from the shifter rod (106).
The plunger assembly (104) comprises a housing (112), a plunger (114), a spring
(116) and a circlip (118). The plunger (114) is housed in the housing (112) and is
nested in a shifter rod groove (106A) configured in the shifter rod (106). The
8
spring (116) is attached to a first operative end (114A) of the plunger (114). The
circlip (118) is fitted over the plunger (114). The circlip (118) is configured to
restrict axial movements of the plunger (114).
The shuttle lock pivot lever (108) includes a cam (108A) and a pivot (108B). The
cam (108A) is configured to rotate about the pivot (108B) in order to ena5 ble
displacement of the plunger (114).
The shuttle lock pivot lever (108) is connected to clutch actuation shaft lever
(120) of the clutch pedal (110) by means of an adjustable link. In an embodiment,
the adjustable link is a shuttle lock tie rod (122).
10 The clutch tie rod (124) connects the clutch actuation shaft lever (120) to the
clutch pedal (110). When the clutch pedal (110) is depressed or released, the
clutch tie rod (124) is moved in an operative vertical direction. Consequently, the
clutch actuation shaft lever (120) rotates with respect to the vertical movement of
the clutch tie rod (124). The rotation of the clutch actuation shaft lever (120)
15 results in the vertical movement of the shuttle lock tie rod (122).
In a working embodiment, when the operator depresses the clutch pedal (110), the
clutch tie rod (124) moves upward. As a result, the clutch actuation shaft lever
(120) rotates in an anticlockwise direction to enable the upward movement of the
shuttle lock tie rod (122). Due to the movement of the shuttle lock tie rod (122),
20 the shuttle lock pivot lever (108) rotates about the pivot (108B) in the anticlockwise
direction. The cam (108A) of the shuttle lock pivot lever (108) rotates
in the anticlockwise direction, thereby clearing way for the disengaging of the
plunger (114). Simultaneously, the spring (116) forces the plunger (114) out of the
shifter rod groove (106A) configured on the shifter rod (106), and allows the
25 movement of the shifter rod (106). Thus, the shifter rod can be shifted and
actuated only when desired. The plunger (114) is moved back into the shifter rod
groove (106A) when the clutch pedal (110) is released.
The arrangement (100) of the present disclosure requires less maintenance and is
reliable. Further, the arrangement (100) results in less wear and tear of gears since
9
sudden engagement and disengagement of the gears are prevented. As a result, the
arrangement (100) makes the tractor safe to use. Further, the arrangement (100)
requires less servicing.
The foregoing description of the embodiments has been provided for purposes of
illustration and not intended to limit the scope of the present disclosure. Individua5 l
components of a particular embodiment are generally not limited to that particular
embodiment, but, are interchangeable. Such variations are not to be regarded as a
departure from the present disclosure, and all such modifications are considered to
be within the scope of the present disclosure.
10 TECHNICAL ADVANCEMENTS
The present disclosure described herein above has several technical advantages
including, but not olimited to, the realization of an arrangement to prevent
accidental actuation of a tractor forward-reverse shuttle lever, that:
 requires less maintenance;
15  causes less wear and tear of gears; and
 is reliable.
The embodiments herein and the various features and advantageous details thereof
are explained with reference to the non-limiting embodiments in the following
description. Descriptions of well-known components and processing techniques
20 are omitted so as to not unnecessarily obscure the embodiments herein. The
examples used herein are intended merely to facilitate an understanding of ways
in which the embodiments herein may be practiced and to further enable those of
skill in the art to practice the embodiments herein. Accordingly, the examples
should not be construed as limiting the scope of the embodiments herein.
25 The foregoing description of the specific embodiments so fully reveal the general
nature of the embodiments herein that others can, by applying current knowledge,
readily modify and/or adapt for various applications such specific embodiments
10
without departing from the generic concept, and, therefore, such adaptations and
modifications should and are intended to be comprehended within the meaning
and range of equivalents of the disclosed embodiments. It is to be understood that
the phraseology or terminology employed herein is for the purpose of description
and not of limitation. Therefore, while the embodiments herein have bee5 n
described in terms of preferred embodiments, those skilled in the art will
recognize that the embodiments herein can be practiced with modification within
the spirit and scope of the embodiments as described herein.
The use of the expression “at least” or “at least one” suggests the use of one or
10 more elements or ingredients or quantities, as the use may be in the embodiment
of the disclosure to achieve one or more of the desired objects or results.
Any discussion of documents, acts, materials, devices, articles or the like that has
been included in this specification is solely for the purpose of providing a context
for the disclosure. It is not to be taken as an admission that any or all of these
15 matters form a part of the prior art base or were common general knowledge in
the field relevant to the disclosure as it existed anywhere before the priority date
of this application.
The numerical values mentioned for the various physical parameters, dimensions
or quantities are only approximations and it is envisaged that the values
20 higher/lower than the numerical values assigned to the parameters, dimensions or
quantities fall within the scope of the disclosure, unless there is a statement in the
specification specific to the contrary.
While considerable emphasis has been placed herein on the components and
component parts of the preferred embodiments, it will be appreciated that many
25 embodiments can be made and that many changes can be made in the preferred
embodiments without departing from the principles of the disclosure. These and
other changes in the preferred embodiment as well as other embodiments of the
disclosure will be apparent to those skilled in the art from the disclosure herein,
11
whereby it is to be distinctly understood that the foregoing descriptive matter is to
be interpreted merely as illustrative of the disclosure and not as a limitation.

WE CLAIM:
1. An arrangement (100) to prevent accidental actuation of a tractor forwardreverse
shuttle lever, said arrangement (100) connecting the shuttle lever to
the clutch pedal (110), wherein said arrangement (100) is configured to
engage the shifter rod (106) of said shuttle lever in a released state of t5 he
clutch pedal (110) to prevent accidental displacement of the shifter rod, and
is further configured to disengage from said shifter rod (106) in the
depressed state of said clutch pedal (110) to permit displacement of said
shifter rod (106), and therefore the shuttle lever.
10 2. The arrangement (100) as claimed in claim 1, wherein said arrangement
(100) comprises:
 a spring loaded plunger assembly (104) engaged with the shifter rod
(106) of said shuttle lever; and
 a shuttle lock pivot lever (108) connecting said plunger assembly (104)
15 with said clutch pedal (110), said shuttle lock pivot lever (108)
configured to be displaced when said clutch pedal (110) is depressed to
disengage said plunger assembly (104) from said shifter rod (106).
3. The arrangement (100) as claimed in claim 1, wherein said plunger
assembly (104) comprises:
20 o a housing (112);
o a plunger (114) contained in said housing (112) and nested in a shifter
rod groove (106A) configured in said shifter rod (106);
o a spring (116) attached to a first operative end (114A) of said plunger
(114); and
25 o a circlip (118) fitted over said plunger (114), said circlip (118)
configured to restrict axial movements of said plunger (114).
13
4. The arrangement (100) as claimed in claim 1, wherein said shuttle lock pivot
lever (108) includes a cam (108A) and a pivot (108B), said cam (108A) is
configured to rotate about said pivot (108B) to enable displacement of said
plunger (114).
5. The arrangement (100) as claimed in claim 1, wherein said shuttle lock pi5 vot
lever (108) is connected to clutch actuation shaft lever (120) of said clutch
pedal (110) by means of an adjustable link.
6. The arrangement (100) as claimed in claim 1, wherein said adjustable link is
a shuttle lock tie rod (122).