Title of Invention

A FLOATING PUMP AND MOTOR ASSEMBLY WITH SELF-PRIMING CHAMBER

Abstract A floating pump and motor assembly comprising a float member for being set afloat on the water in a well; a motor coupled pump mounted on the float member, the motor deriving power supply from a source and the discharge end of the pump being connected to a flexible pipe for delivery of the water outside the well; a chamber, one end thereof for communicating with the water in the well through a second pipe, the other end thereof for communicating with the suction side of the pump, for the suction of water, through the chamber, into the pump, the said chamber thus always containing water to prime the pump, means for rendering the float member stable as it is raised and lowered with the rise and fall of the level of the water in the well.
Full Text

This invention relates to a floating pump and motor assembly, with self-priming chamber.
When the level of water in open wells changes, that is rises or falls, due to climatic and other reasons, such as increase or decrease in ground water supply, the known pump and motor assembly installed within the well will have to be shifted from time to time to conform to the change in water level in the well which can even result in the assembly submerging in the water in the well. This exercise of shifting the assembly involves skilled labour, time and expense.
During summer/flash rains, the water level rises abnormally and submerges the motor/pump installed on the intermediate platform inside the well.
In the case of the known pump and motor assembly, a foot valve is provided on the suction side for keeping the pump primed. This, and the large suction head involved, not only consume excessive power but also result in reduced discharge.
This invention therefore proposes a floating pump and motor assembly which obviates the above-mentioned drawbacks.
Thus, with this invention the need for shifting the location of the pump and motor is eliminated. The pump and motor are self-locating inasmuch as they are set afloat on the water in the well and thus rise and fall with the rise and fall in water level.

In this invention, the suction head is minimal and kept constant, since the pump is maintained close to the water level.
This invention also has a provision for rendering the pump self-priming, thereby eliminating the need to have a foot valve.
The floating pump and motor assembly, according to this invention, comprises a float member for being set afloat on the water in a well; a motor coupled pump mounted on the float member, the motor deriving power supply from a source and the discharge end of the pump being connected to a flexible pipe for delivery of the water outside the well; a chamber, one end thereof for communicating with the water in the well through a second pipe, the other end thereof for communicating with the suction side of the pump, for the suction of water, through the chamber, into the pump, the said chamber thus always containing water to prime the pump; means for rendering the float member stable as it is raised and lowered with the rise and fall of the level of the water in the well.
This invention will now be described in further detail by
referring to the accompanying drawings, which illustrate by
way of example, and not by way of limitation, one of possible
embodiments of the pump and motor assembly proposed herein,
Fig. 1 illustrating the assembly
And
Fig. 2 illustrating a separate view of the self-priming chamber.

A float member F is set afloat on the water in a well. The term "well" in the description and in the Claims contained in this specification includes all water reservoirs to which this invention is applicable, such as, a pond or lake from which water is to be pumped out.
A motor coupled pump is mounted on the float member. The motor is indicated by M and the pump by P. The motor derives electric power from a source, usually, located outside the well W. The electric connection of motor and source is made by a flexible cable B. The pump P is connected to a flexible pipe D for delivery of the water outside the well. The flexible pipe D is preferably coiled and left afloat on the water in the well, to adjust to changing water level in the well. Snap on floats K are provided for the pipe D to keep the pipe afloat on the surface Q of the water in the well
A self-priming chamber C is provided for the pump P, one end G of which has a first opening at R communicating with the water in the well through a pipe (suction pipe) E. The other end H of the chamber C, has a second opening at V, lower than the first opening, communicating with the suction side of the pump for the suction of water, through the chamber, into the pump.
The above mentioned arrangement allows the water to drain into the well to an extent just below the opening R, whenever the motor is switched OFF, thus leaving the undrained water in the chamber always ready for priming the pump whenever the motor is switched ON.

Means are provided for rendering the float member stable as it is raised and lowered with the rise and fall of the level of the water in the well. These means consist of three pulleys, rope Y and counterweight arrangement. The counterweight is indicated by T and the pulleys by J. The said arrangement is fixed to the float F and to a rigid structure S The flexible cable B is preferably intertwined with the rope.
A filter is provided for the suction pipe E. In one of its forms the filter is a perforated plastic basket L for filtering off floating solids.
It will be appreciated that the terms and expressions herein are of description and not of limitation, since various other embodiments of the pump and motor assembly proposed herein are possible without departing from the scope and ambit of this invention.













We Claim:
1 .A floating pump and motor assembly comprising a float member for being set afloat on the water in a well; a motor coupled pump mounted on the float member, the motor deriving power supply from a source and the discharge end of the pump being connected to a flexible pipe for delivery of the water outside the well; a chamber, one end thereof for communicating with the water in the well through a second pipe, the other end thereof for communicating with the suction side of the pump, for the suction of water, through the chamber, into the pump, the said chamber thus always containing water to prime the pump; means for rendering the float member stable as it is raised and lowered with the rise and fall of the level of the water in the well.
2.A pump and motor assembly as claimed in Claim 1 wherein the means for rendering the float member stable consist of a rope and pulley arrangement fixed to the float member and to a rigid structure provided for the well.
3.A pump and motor assembly as claimed in Claim 2 wherein the rope and pulley arrangement consist of three pulleys, rope and counterweight arrangement.
4.A pump and motor assembly as claimed in Claim 2 or Claim 3 wherein the motor derives power from a source through a flexible cable intertwined with the rope. 5. A pump and motor assembly as claimed in any one of the
preceding Claims wherein a filter is provided for the
suction pipe.
6. A pump and motor assembly as claimed in Claim 5 wherein the filter is a perforated plastic basket.

7 A pump and motor assembly as claimed in any one of the preceding Claims wherein the flexible pipe is coiled and left afloat on the water in the well, to adjust to changing water level in the well.
8. A pump and motor assembly as claimed in any one of the
preceding Claims wherein snap-on floats are provided for the
flexible pipe to keep the said pipe afloat on the surface of the
water in the well.
9. A pump and motor assembly as claimed in anyone of the
preceding Claims wherein one end of the chamber has a first
opening communicating with the water in the well through the
said second pipe while the other end of the chamber has a
second opening, lower than the first opening, communicating
with the suction side of the pump.
10. A floating pump and motor assembly substantially as herein
described with reference to, and as illustrated in, the
accompanying drawings.


Documents:

1361-CHE-2007 EXAMINATION REPORT REPLY RECEIVED 04-08-2010.pdf

1361-CHE-2007 POWER OF ATTORNEY 04-08-2010.pdf

1361-che-2007-abstract.pdf

1361-che-2007-claims.pdf

1361-che-2007-correspondnece-others.pdf

1361-che-2007-description(complete).pdf

1361-che-2007-drawings.pdf

1361-che-2007-form 1.pdf

1361-che-2007-form 18.pdf


Patent Number 245116
Indian Patent Application Number 1361/CHE/2007
PG Journal Number 01/2011
Publication Date 07-Jan-2011
Grant Date 03-Jan-2011
Date of Filing 26-Jun-2007
Name of Patentee POLYENE FILM INDUSTRIES LIMITED
Applicant Address A-11&12 INDUSTRIAL ESTATE GUINDY CHENNAI 600032
Inventors:
# Inventor's Name Inventor's Address
1 MUDUMBI PARTHASARATHY POLYENE FILM INDUSTRIES LIMITED A-11&12 INDUSTRIAL ESTATE GUINDY CHENNAI 600032
PCT International Classification Number F04B19/00
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA