Claims:We claim:
1. A pump set assembly comprises of: a motor with extended drive shaft
(01); a suction case (02) mounted on said motor and define the suction
chamber; a primary coupling (04) inside the suction chamber
interconnect; a drive shaft and a connecting rod (05); a pump casing (06)
fitted on said suction case extended up to discharge port (07), wherein
said suction case and discharge port fasten together,
According to embodiment of the invention said connecting rod extended
and fasten with; a pump rotor (08), wherein said rotor at least partially
enclosed by; a stator (09),
According to embodiment of the invention said pump casing further
comprises of; an upper casing (11) and a lower casing (12) wherein said
upper casing and lower casing interconnected through; an intermediate
pipe (13),
According to embodiment of the invention said connecting rod further
comprises of; an upper connecting rod (14) and; a lower connecting rod
(15), wherein said upper and lower connecting rod coupled through; an
intermediate coupling (16),
According to further embodiment of the invention; an annular plate (22)
placed below the intermediate coupling at predefined interval,
According to further embodiment of the invention; a bush (23) fitted
inside the pump casing to partially enclose the connecting rod,
In a further embodiment; an up thrust washer (24) fitted in suction case
and intermediate pipe in order to receive primary coupling and
intermediate coupling.
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2. The pump assembly as claimed in claim 1, wherein according to preferred
embodiments of the invention said primary coupling and intermediate
couplings are spline coupling, but not limited to Spline coupling, Jaw
coupling and Tooth coupling.
3. The pump assembly as claimed in claim 1 and 2, wherein said spline
coupling further comprises of; a spline connector (20) having spline in its
inner & outer surface; a hub (21) is having spline in its inner surface to
completely adapt the connecter’s outer spline.
4. The pump assembly as claimed in claim 3, wherein said spline connector
and hub are integral part.
5. The pump assembly as claimed in claim 1, wherein said connecting rod
extended inside the pump rotor (08) and deep-seated from bottom of the
stator.
6. The pump assembly as claimed in claim 1, wherein said intermediate pipe
have at least; an arm extended radially inward and form; an annular ring,
wherein said annular ring allow passing the connecting rod from its
aperture, wherein said annular ring fitted at predefined interval above the
intermediate coupling.
7. The pump assembly as claimed in claim 1, wherein according to preferred
embodiments of the invention said bush fitted in suction case and
intermediate pipe in a way that it coaxial with connecting rod.
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8. The pump assembly as claimed in claim 1, wherein the up thrust washer
retained in suction case and intermediate pipe in a way that the
longitudinal distance between up thrust washer & couplings maintain the
maximum float independently for pump and motor.
9. The pump assembly as claimed in claim 1, wherein said connecting rod
have at least one intermediate coupling.
10. The pump assembly as claimed in claim 1 to 10, substantially described
with reference to the accompanying drawing. , Description:Field of the invention
The present invention relates to pump motor assembly. More particularly, it
relates to a development helical pump set with anti vibrations power
transmission assembly.
Background of the invention
The present invention relates to pump assembly more particularly it relates to
the anti vibration transmission assembly adjoining the pump & motor,
In a helical pump assembly helical rotor rotate offset from its centre axis, thus
it’s difficult to connect the helical rotor direct to the motor shaft, hence offset
coupling & flexible connecting rod often to use to connect helical rotor & motor
shaft.
The offset coupling leads to friction thus it increase mechanical losses, which
leads to lower efficiency. Whereas flexible connecting rods are rigidly
connected to the helical rotor & motor shaft, thus offset movement of the helical
rotor trigger the whirling of the shaft, which leads higher vibration & fatigue
failure at joining of the shaft.
A need remains for connecting a helical pump assembly to motor in efficient &
reliable manner.
US patent no. US7905714B2 Describe A progressing cavity pump assembly
includes a collar assembly connecting a housing and a tubing string, with the
collar having an inside diameter upset and the rotor having a rotor head axially
spaced from a rotor helix, with the rotor head having an outer diameter forming
a stop adapted to land on the inside diameter upset. A method of timing a
progressing cavity pump assembly includes providing a collar assembly having

an inside diameter upset, movably connecting the collar assembly and the
housing, providing a rotor having a rotor head axially spaced from a rotor helix,
with the rotor head having an outer diameter forming a stop, selectively
adjusting the relative position of the collar assembly and the housing to form a
pathway substantially corresponding to the rotor helix, landing the stop on the
inside diameter upset, and fixing the relative position of the collar assembly and
the housing.
Objects of the Invention
It is an object of the present invention is to provide a transmission assembly
which is capable to absorb vibration of helical pump set.
It is another object of the present invention is to provide a transmission
assembly which absorbs vibrations & reduces fatigue failure.
It is still another object of the present invention is to provide a transmission
assembly which reduces the frictional losses and increases overall efficiency of
the pump system.
It is further object of the present invention is to provide a transmission assembly
which is efficient & easy to install.
Summary of the Invention
In a helical pump assembly helical rotor rotate offset from its centre axis, thus
it’s difficult to directly connect the helical rotor to the motor shaft, hence offset
coupling & flexible connecting rod use to couple helical rotor & motor shaft.
The offset coupling and connecting rods have their own limitations which leads
frictional losses & fatigue failure.

In accordance with the present invention a pump assembly comprises of: a
motor with extended drive shaft (01); a suction case (02) mounted on said motor
and define the suction chamber (03), a primary coupling (04) inside the suction
chamber interconnect the drive shaft (01) and a connecting rod (05); A pump
casing (06) fitted on said suction case extended and fasten with discharge port
(06).
According to embodiment of the invention said connecting rod (05) extended
and fasten with pump rotor (08), wherein said rotor at least partially enclosed
by a stator (09), furthermore said stator supported by a support ring (10) and
discharge port;
According to further embodiment of the invention said pump casing (06) further
comprises of an upper casing (11) and a lower casing (12) wherein said upper
casing and lower casing interconnected through an intermediate pipe (13).
According to further embodiment of the invention said connecting rod (05)
further comprises of an upper connecting rod (14) and a lower connecting rod
(15), wherein said upper and lower connecting rod coupled through an
intermediate coupling (16).
Brief Description of Drawings
Figure 1 Illustrates the Cut Section View of the Pump Assembly
Figure 2 illustrates the detailed section view of primary coupling
Figure 3 illustrates the detailed section view of secondary coupling

Detailed Description of the invention
Hereinafter, various embodiments of the present disclosure will be described
with reference to the accompanying drawings. It should be noted that all of
these drawings and description are only presented as exemplary embodiments.
It is to note that based on the subsequent description, alternative embodiments
may be conceived that may have a structure and method as disclosed herein, and
such alternative embodiments may be used without departing from the principle
of the disclosure as claimed herein.
It may be appreciated that these exemplary embodiments are provided herein
only for enabling those skilled in the art to better understand and then further
implement the present disclosure, and is not intended to limit the scope of the
present disclosure in any manner.
In accordance with the present invention there is provided a pump set assembly
comprises of: a motor with extended drive shaft (01); a suction case (02)
mounted on said motor and define the suction chamber (03), a primary coupling
(04) inside the suction chamber interconnect the drive shaft (01) and a
connecting rod (05); a pump casing (06) fitted on said suction case and
extended up to discharge port (07) wherein said discharge port (07) and pump
casing (06) fasten together;
According to embodiment of the invention said connecting rod (05) extended
and fasten with pump rotor (08), wherein said pump rotor (08) fully or partially
enclosed by a stator (09), furthermore said stator (09) supported by a support
ring (10) and discharge port (07);
According to further embodiment of the invention said pump casing (06) further
comprises of an upper casing (11) and a lower casing (12) wherein said upper
casing (11) and lower casing (12) interconnected through an intermediate pipe
(13).

According to further embodiment of the invention said connecting rod (05)
further comprises of an upper connecting rod (14) and a lower connecting rod
(15), wherein said upper and lower connecting rod coupled through an
intermediate coupling (16); wherein said intermediate coupling (16) increases
the flexibility in connecting rod (05) moreover it absorbs vibrations occurred
from pump rotor (08). Typically said connecting rod (05) has at least one
intermediate coupling (16).
Typically separation of said pump casing (06) in form of upper casing (11) and
lower casing (12) allow easy installation of intermediate coupling (16),
according to preferred embodiment of the invention said intermediate pipe (13)
fully or partially encloses the intermediate coupling (16).
Reference is made to Figure 3, wherein said intermediate pipe (13) has at least
an aperture (17) normal to connecting rod (05) which allows passing connecting
rod. Moreover said intermediate pipe (13) have at least an arm (18) extended
radially inward and form an annular ring (19) wherein said annular ring allow
passing the connecting rod (05) from its aperture. Wherein said annular ring
with aperture (17) fitted at predefined interval above the intermediate coupling
(16).
According to preferred embodiments of the invention said primary coupling
(04) and intermediate couplings (16) are spline couplings, but not limited to
Spline coupling, Jaw coupling and Tooth coupling.
Reference is made to Figure 2 preceding description, wherein said spline
coupling (04, 16) further comprises of spline connector (20) having spline in its
inner & outer surface; a hub (21) is having spline in its inner surface to
completely adapt the connecter’s outer spline. Wherein said spline connector
(20) designed to adapt drive shaft (01) and hub (21) receives the connecting rod

(05). According to an alternate embodiment of the invention said spline
connector (20) and hub (21) are integral part.
According to further embodiment of the invention an annular plate (22) placed
below the intermediate coupling (16) at predefined interval; wherein said
annular plate (22) restrict the downside movement of the intermediate coupling
(16) when motor and drive shaft (01) are not connected to pump. Wherein said
annular plate (22) mounted on intermediate pipe (13). According to an alternate
embodiment of the invention said annular plate (22) mounted on pump casing
(06).
In a further embodiment of the invention a bush (23) fitted inside pump casing
(06) to partially enclose the connecting rod (05). Moreover according to
preferred embodiment of the invention bush (23) mounted on intermediate pipe
(13) and suction case (02) in a way that it coaxial with connecting rod (05) and
prevents direct contact of connecting rod (05) to intermediate pipe (13) and
suction case (02) during its operation.
In a further embodiment an up thrust washer (24) fitted in suction case (02) and
intermediate pipe (13) in order to receive primary coupling (04) and
intermediate coupling (16). Moreover the up thrust washer (24) keep apart
primary coupling (04) to suction case (02) and intermediate coupling (16) to
annular ring (19) of intermediate pipe in order to avoid wearing and direct
contact. Furthermore longitudinal clearance between up thrust washer (23) and
intermediate coupling (16) provides maximum float for pump, whereas
longitudinal clearance between up thrust washer (24) and primary coupling (04)
maintains maximum independent float for motor.
Typically material of the up thrust washer (24) not limiting to Polyethylene,
Polypropylene, Polystyrene, Polyvinyl chloride, Polyamides, Polyester,

polycarbonate, Polybutane, Polytetrafluoroethylene, Fluoroplastic, Polyacetals,
Ferrous Alloy and Copper Alloy.
Typically said connecting rod (05) is extended inside the pump rotor (08) and
deep-seated from bottom of the stator (09). Furthermore according to preferred
embodiment of the invention upper connecting rod (14) is extended and deep-seated
inside the pump rotor (08). Thus connecting rod (05) connection near to
center of the pump rotor (08) reduces amplitude of vibrations.
The pump assembly as substantially described above with reference to the
accompanying drawing.