Motors: expansible chamber type – Cyclically operable – Codirectional separately supplied working members
Reexamination Certificate
2006-05-18
2008-12-02
Lazo, Thomas E (Department: 3745)
Motors: expansible chamber type
Cyclically operable
Codirectional separately supplied working members
C417S393000
Reexamination Certificate
active
07458309
ABSTRACT:
Reciprocating pumps are disclosed. Particularly, reciprocating pumps including pressure chambers and fluid chambers defined by flexible members are disclosed. The volume of the pressure chambers and fluid chamber may be controlled using a piston driven by the flow of a control fluid to a pressure chamber and associated piston chamber. The flow of the control fluid may be directed to a first pressure chamber and associated piston chamber or a second pressure chamber and associated piston chamber. A pneumatically driven switch or an electrically driven switch may direct the flow of control fluid. The electrically driven switch may be controlled with a timer, a pressure sensor, or an optical sensor. The reciprocating pump requires minimal modification to permit the use of a pneumatic switch or electrical switch.
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International Search Report for International Application No. PCT/US2007/011475, dated Oct. 31, 2007 (4 pages).
Simmons David M.
Simmons John M.
Simmons Tom M.
Lazo Thomas E
TraskBritt
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