Claims:We claim:
1. A helical pump assembly comprises of; a base structure 01; a tubular
housing 02 wherein its lower end fix on the base structure; a pump head
04 disposed on the upper end of the tubular housing to cover up the
opening and hence form a pump chamber 06; a pump stator 07 mounted
on the base structure and at least partially enclosed by tubular housing,
wherein said pump stator formed with stator cavity 08 in helical form; a
helical rotor 09 disposed in said stator cavity and at least partially
enclosed by the pump stator; a transmission assembly 10 rotatably
supports the rotor and extended through said pump head; a motor 11
disposed on pump head, wherein motor shaft 12 attach to the transmission
assembly; a shaft seal 13 disposed in coaxial relationship with pump head
opening 14 & partially enclose the transmission assembly.
2. A helical pump assembly as claimed in claim 1, wherein said
transmission assembly further comprises of; a connecting rod 15 attach to
the motor shaft and extended inside the pump chamber; A flexible
coupling 16 dispose inside the chamber to interlink the rotor and
connecting rod.
3. A helical pump assembly as claimed in claim 1, wherein said
transmission assembly substantially as described, lies in between motor
shaft and pump rotor is a flexible link.
4. A helical pump assembly as claimed in claim 1, wherein according to one
of the embodiments of the invention, substantially as described the
transmission assembly and motor shaft are integral part.

5. A helical pump assembly as claimed in claim 1, wherein said
transmission assembly to interlink the motor shaft and rotor comprises
from a group but not limited to flexible connecting rod, offset coupling,
universal coupling and flexible coupling.
6. A helical pump assembly as claimed in claim 1, wherein according to
preferred embodiment’s annular recess 20 lies between tubular housing
and stator is perform as inlet passage.
7. A helical pump assembly as claimed in claim 1, wherein according to
alternative embodiments of the invention, annular recess lies between
tubular housing and stator is perform as outlet passage.
8. A helical pump assembly as claimed in claim 1, wherein longitudinal axis
of said stator normal to the inlet and outlet flow direction.
9. A helical pump assembly as claimed in claim 1, wherein according to
preferred embodiment’s base structure has inlet and outlet ports.
10. A helical pump assembly as claimed in claim 1, wherein base structure
further comprises of a pump base 23 and a support member 24.
11. A helical pump assembly as claimed in claim 1, wherein said pump base
and support member substantially as described are integral part.
12. A helical pump assembly as claimed in claim 1, substantially as described
with reference to accompanying drawing. , Description:Field of the invention
The present invention relates to a positive displacement pump, more particularly
it relates to a development of helical pump with inline arrangement.
Background of the invention
Inline pump systems facilitate installation of pump in same one pipe system,
where inlet pipe and outlet pipe are in same axis, thus it provides compact and
uncomplicated pipe frame work and design. Thus it has huge industrial
application in various sectors.
The conventional inline pump system employs centrifugal pumps to perform
pumping action. As we know in industrial sector running time of the pumps
considerably higher, thus pump efficiency is one of the key elements for cost
saving. The significant number of pumps play crucial role in optimising the
energy consumption, in any system or industries.
As inline pumping system have large industrial application thus efficiency
improvement in inline pumps are essential to improve system or industrial
efficiency.
The centrifugal pumps are not as efficient as helical pumps; moreover helical
pumps are capable to pump the fluid at higher pressure with less power
consumption.
Furthermore centrifugal pumps employed with number of stages to get higher
pressure, which leads large number of parts and hence it is difficult to handle, as
well increases inventory cost. Moreover large number of products further
increases assembly time & overall cost.

Such a Multiple-stage centrifugal pump is disclosed in. US20090274555A1,
said invention relates to a multiple-stage centrifugal pump of inline design,
comprising a connection housing (1) with connectors (2, 3) in the form of
suction and pressure connectors, and a pump body (4). The pump body (4) is
surrounded at a spacing by a casing tube (6) with the formation of a flowguiding
annular space (5). The pump body (4) and the casing tube (6) are
fastened so as to transmit force between the connection housing (1) and a head
piece (7), the head piece (7) is provided with a lead through for a motor-driven
pump shaft (8), and the connection piece (1) is provided with a separating wall
(9) which divides the suction and pressure regions, a flow-diverting guide
element (10) being arranged in the transition region between the annular space
(5) and a connector (3).
Such an inline centrifugal pump is disclosed in US10082155B2, said centrifugal
pump (1) includes several pump stages which are arranged axially between a
head part (4) and a foot part (2). An outer casing (3) peripherally surrounds the
pump stages. An axial end of the outer casing (3) is fastened on the head part
and the other axial end of the outer casing (3) is fastened on the foot part. A
mechanical connection between the head part (4) and the foot part (2) is formed
by the outer casing (3).
While the prior art teaches various design of In-Line pump, there are a number
of inherent drawbacks in the disclosed designs. One of the drawbacks is that
most of these designs are too complicated for mass-production in addition huge
number of parts increases the production time and overall cost of the product. In
fact, a need remains for a system which increases the efficiency moreover it

reduces the manufacturing cost, production time and formulates simple and
compact design.
Objects of the Invention
It is an object of the present invention is to provide an inline flow pump with
high efficiency.
It is another object of the present invention is to provide a high pressure inline
flow pump.
It is still another object of the present invention is to provide an inline pump
with compact design.
It is further object of the present invention is to provide an inline pump which is
easy to manufacture.
It is another object of the present invention, is to provide simple design and
reduce overall cost of the product.
Summary of the Invention
Inline pump systems facilitate installation of pump in same one pipe system,
thus it provides compact and simple pipe frame work and design. This leads
huge industrial application in various sectors.
As inline pumping system have large industrial application thus efficiency
improvement are essential to improve system or industrial efficiency, hence
application of helical pumps is key element for efficiency improvement in inline
pumping system.

A Inline helical pump assembly comprises of; a base structure 01; a tubular
housing 02 wherein its lower end fix on the base structure; a pump head 04
disposed on the upper end of the tubular housing to cover up the opening and
hence form a pump chamber 06; a pump stator 07 mounted on the base and at
least partially enclosed by tubular housing, wherein said stator formed with
stator cavity 08; a helical rotor disposed in said stator cavity and at least
partially enclosed by the pump stator; a transmission assembly 10 rotatably
supports the rotor and extended through said pump head; a motor 11 disposed
on pump head, wherein motor shaft 12 attach to the transmission assembly; a
shaft seal 13 disposed in coaxial relationship with pump head opening &
partially enclose the transmission assembly.
Brief Description of Drawings
Figure 1 illustrates cross sectional view of present discloser.
Figure 2 illustrates exploded view in accordance with the present disclosure.
Figure 3 illustrates cross sectional view of alternative embodiment.
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.
The present invention relates to development of inline helical pump assembly
comprises of; a base structure 01; a tubular housing 02 wherein its lower end 03
fix on the base structure 01; a pump head 04 disposed on the upper end 05 of
the tubular housing 02 to cover up the opening and hence form a pump
chamber 06; a pump stator 07 mounted on base structure 01 and at least
partially enclosed by tubular housing 02, wherein said pump stator 07 formed
with stator cavity 08 in helical form; a helical rotor 09 disposed in said stator
cavity 08 and at least partially enclosed by the pump stator 07; a transmission
assembly 10 rotatably supports the helical rotor 09 and extended through said
pump head 04; a motor 11 disposed on pump head 04, wherein motor shaft 12
attach to the transmission assembly 10; a shaft seal 13 disposed in coaxial
relationship with pump head opening 14 & partially enclose the transmission
assembly 10.
Typically said transmission assembly 10 employed between helical rotor 09 and
motor shaft 12 to reduce the vibrations and hence reduces fatigue failure of
transmission assembly 10 itself and there both adjoining point. The transmission
assembly 10 partially encloses by shaft seal 13, wherein said shaft seal 13
disposed in opening 14 of the pump head; hence the shaft seal 13 prevents the
leakage of the fluid from the chamber 06.
According to the one of the preferred embodiment substantially described
herein the transmission assembly further comprises of; a connecting rod 15
attaches to the motor shaft 12 and extended inside the pump chamber 06; a
flexible coupling 16 dispose inside the chamber to interlink the rotor 09 and
connecting rod 15.

One of the key functions to understand here, that the vibrations occur in the
rotor 09 must be reduced by transmission assembly 10, consequently it must be
a flexible link, thus it helps to get smoother rotation at the point of shaft seal 13
as a result it reduce the chance of leakage and seal failure.
The transmission assembly 10 substantially described to absorb vibrations to
interlink the motor shaft 12 and rotor 09 comprises from a group but not limited
to flexible connecting rod, offset coupling, universal coupling and flexible
coupling. Moreover one of the embodiments of the invention says ‘motor shaft
12’ and ‘transmission assembly 10’ are integral part.
According to preferred embodiments of the invention pump has the annular
recess 20 lies between tubular housing 02 and pump stator 07 perform as an
inlet passage and interlink the inlet port 17 and pump intake 19, wherein outlet
passage 21 extended at end of the pump stator 07 and interconnected with outlet
port 18 which is normal to the longitudinal axis of the pump stator 07.
According to one of the alternative embodiments of the invention substantially
as described in figure -3, annular recess 31 lies between tubular housing 32 and
stator 33 can also be perform as outlet passage. However recess 34 and port 35
serves as inlet passage and inlet port consequently.
According to preferred embodiment of the invention, longitudinal axis 22 of the
said stator normal to the inlet port 17 and outlet port 18 of the pump.
According to preferred embodiment of the invention, base structure 01 further
comprises of a pump base 23 and support member 24, wherein said pump base
23 has inlet port 17 and outlet port 18, wherein both inlet and outlet ports are
separated by a wall.

According to one of the alternative embodiments of the invention said pump
base 23 and support member 24 substantially as described are integral parts.