Pump apparatus and method

Details Pump apparatus and method Pump apparatus and method

2009-09-30

2011-12-06

Freay, Charles (Department: 3746)

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

C417S044200, C417S053000

Reexamination Certificate

active

08070458

ABSTRACT:
Pump apparatus and method. The pump can include a valve assembly and a diaphragm. In some embodiments, the diaphragm can include a convolute that can deform in order to increase a volume of a pumping chamber to provide an internal fluid bypass when a pressure in the pumping chamber exceeds a bypass pressure. In some embodiments, the pump can include a fluid reservoir at least partially defined by a wall with a flow-restrictive conduit in fluid communication with an outlet chamber. A shut-off switch can include an actuator in fluid communication with the fluid reservoir. The fluid reservoir and the flow-restrictive conduit can substantially isolate the shut-off switch from pressure pulses in the outlet chamber.

REFERENCES:
patent: 5352096 (1994-10-01), Chi-Wen
patent: 5482439 (1996-01-01), Chen
patent: 6607360 (2003-08-01), Fong

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