Patent ID: 9217425
Filing Date: 2015-12-22
Classification: F04B

Abstract:
1. A diaphragm pump comprising: a motor comprising an output shaft; an eccentric member driven by the output shaft, the eccentric member comprising a plurality of arms moving up and down due to rotation of the output shaft; a diaphragm comprising a plurality of bladders, each of the bladders forming a pump chamber, the bladders being connected with arms of the eccentric member, respectively, such that the pump chambers are compressed and expanded due to movement of the arms; an air exhaust chamber communicating with the pump chambers via channels; a plurality of first valves arranged to control the flow of air through the channels; an air inlet chamber communicating with the pump chambers via a passage for supplying air to the pump chambers via the passage; a cavity forming a part of the passage; a plurality of second valves arranged to control the flow of air into the pump chambers from the cavity; an air guide plate in which the channels are formed; a base; a holder, the base and the holder cooperatively defining the air inlet chamber; and a casing, the air guide plate and the casing cooperatively defining the air exhaust chamber, wherein the air inlet chamber and the air exhaust chamber are respectively located at opposite sides of the air guide plate, and wherein a plurality of mounting holes are formed in sidewalls that define the air inlet chamber and the air exhaust chamber, the mounting holes form pathways, which forms a part of the passage between the air inlet chamber and the cavity, the pathways passing through the holder, the air guide plate and the casing.