Pumps – Expansible chamber type – Valved piston
Reexamination Certificate
2005-09-22
2008-05-27
Nguyen, Ninh (Department: 4147)
Pumps
Expansible chamber type
Valved piston
C417S547000, C092S086000
Reexamination Certificate
active
07377757
ABSTRACT:
The invention concerns a fluid pump with a cylinder, piston and check valve for compressing the fluid having a high-pressure seal for precluding leakage of pressurized fluid. Any leakage from the high-pressure seal feeds back into an inlet area of the pump and recycles through the pump instead of leaking externally.
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Walch, Jr. Michael D.
Wiegand James A.
Bayou Amene S
Graves Spray Supply, Inc.
Larson & Larson
Liebenon Frank
Nguyen Ninh
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