Patent ID: 9719502
Date: 2017-08-01
CPC Classifications: F04B

Claim:
1. A diaphragm pump comprising: a motor; an integrally formed housing for receiving and securely holding the motor, the housing comprising: a cover for the housing having axially aligned inlet and outlet ports, each leading to mutually exclusive inlet and outlet chambers respectively, the cover being adapted to engage with the housing; a motor locking plate secured to the motor by screws, such that when the motor locking plate is secured to the motor and with the motor inserted in the elongate portion of the housing, at least a portion of the motor locking plate is provided within the collar portion, wherein the motor locking plate comprises a barrel for receiving a spiral spring and a plunger; a diaphragm plate extending across the open end of the housing between the collar portion of the housing and the cover and being secured therebetween when the cover is engaged with the collar portion of the housing, the diaphragm plate having a plurality of similarly defined circular regions; a wobble plate positioned within the collar portion of the housing, the wobble plate having a central boss and a plurality of similar piston sections equal in number to the number of circular regions on the diaphragm plate, the piston sections and circular regions on the diaphragm plate being correspondingly secured together, whereby in use, when the motor is activated, the wobble plate is subject to nutating motion to cause reciprocating action of the circular regions and thereby provide a pumping action.