| US2942555A | 1960-06-28 | |||
| US20040234395A1 | 2004-11-25 | |||
| JP2004308562A | 2004-11-04 | |||
| US2556435A | 1951-06-12 |
| THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS A pump design where:
1. The pump motor forms the floor of the pump body.
2. The roof or roof and wall of the pump body being of one piece is located over the motor and shaft.
3. The pump is sealed by means of an o ring located between the inner pump wall and the outer of the motor wall
4. The pump may or may not be further sealed by means of gasket between the lower edge of the pump body and the rim on the lower outer edge fo the motor.
5. The pump is again further sealed by means of seal either lip, face or other kind, located on the motor shaft and in the hub of the impeller.
6. The pump is cooled by means of allowing pump fluid to pass over the face and wall of the motor, and take away heat transferred from the motor into the fluid. |
Electric Pump-Motor Design
The current invention relates to improvements in design of pumps driven by motors, for use in a multiplicity of applications.
Currently pumps are built by having a pump chamber, and inserting the shaft of a separate motor into the said chamber to attach to an impeller which impeller is then driven. The assembly is thick and often the motor becomes too hot and requires extra cooling, sometimes by means of a smail fan attached to the other end of the motor shaft to the pump impeller end. Currently the motor needs to be kept separate to the pump body to allow air to circulate around the motor to prevent the motor from overheating and failing. This configuration adds to the thickness of the assembly which is a problem in automotive applications where space is at a premium.
The objective of the present invention therefore is to minimise the size of the pump with regard to height, in relation to the pump's capacity and to prevent overheating of the pump motor.
The present invention uses the motor to form the floor of the pump chamber, theri the roof and wall of the pump chamber, of any material, in one piece is passed over the motor and shaft, larger in diameter than the motor, to seal around the outside of the motor, by means of an o ring or gasket or both. A shaft seal is then installed on the rotating motor shaft and located in the hub of the pump impeller, preventing pump fluid passing into the motor by means of the front bearing of the motor. The impeller is of a lesser diameter than the motor, or is holed or both or neither, which directly exposes the face of the motor to pump fluid.
The objective of the present design is to minimise the size of the pump, and to cool the motor by way of passing the pump fluid over the face and walls of the motor, taking heat away from the motor by means of the pump fluid.
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