Pumps – Expansible chamber type – Fluid serially moved to opposite side of pumping member
Patent
1998-06-05
2000-05-09
Bennett, Henry
Pumps
Expansible chamber type
Fluid serially moved to opposite side of pumping member
417434, F04B 3910
Patent
active
060595485
ABSTRACT:
A hand pump system for pressurizing and de-pressurizing a pneumatic cylinder on a traction device. The hand pump system includes a hand pump having a pump head with a vent hole. A flow control assembly has a stem portion extending into the pump head. The stem portion has a primary chamber fluidly coupled to the pneumatic cylinder and a stem passageway extending through the stem portion. The housing is rotatable within the pump head between a pump position fluidly coupling the stem passageway with the pump; to a release position fluidly coupling the stem passageway with the vent hole; and to a positive shut off position to seal the vent hole with a vent seal and to seal the stem passageway with a pump seal. A pressure gauge is included in the flow control assembly fluidly coupled to the primary chamber.
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Campbell Glenn M.
Kluge Douglas
Bennett Henry
Boles Derek
The Saunders Group, Inc.
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