Diaphragm pump with adjustable stroke length

Details Diaphragm pump with adjustable stroke length Diaphragm pump with adjustable stroke length

1998-02-23

1999-12-21

Paschall, Mark

Pumps

Processes

417386, 417387, 417393, 417395, 417439, 92100, F04B 1924

Patent

active

060041056

ABSTRACT:
A fluid powered diaphragm pump with an adjustable stroke is provided. The stroke of the pump is adjusted by providing an inner diaphragm plate assembly that includes a retractable piston. The piston is biased towards the inner plate by one or more standoffs that attach the piston to the plate. The bias of the piston is overcome by pressurized fluid that is communicated to a chamber defined by the piston and the inner plate. The fluid may be communicated to the chamber through the diaphragm rod. The inner diaphragm plate assemblies of both diaphragm chambers may be connected to different pressurized fluid supplies there enabling the stroke or capacity of the two diaphragm chambers to be controlled independently. As a result, the stroke or capacity of the two diaphragm chambers may differ.

REFERENCES:
patent: 3838946 (1974-10-01), Schall
patent: 4381180 (1983-04-01), Sell
patent: 4416599 (1983-11-01), Longchamp
patent: 4594059 (1986-06-01), Becker
patent: 4773831 (1988-09-01), Brauer et al.
patent: 5707219 (1998-01-01), Powers
patent: 5724881 (1998-03-01), Reynolds
patent: 5816778 (1998-10-01), Elsey et al.

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