Diaphragm pump with adjustable stroke length
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United States of America Patent
Stats
-
Dec 21, 1999
Grant Date -
N/A
app pub date -
Feb 23, 1998
filing date -
Feb 23, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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