Expansible chamber devices – Relatively movable working members – Interconnected with common rotatable shaft
Patent
1995-12-07
1997-07-15
Nguyen, Hoang
Expansible chamber devices
Relatively movable working members
Interconnected with common rotatable shaft
91505, 4172221, 417269, F01B 300
Patent
active
056472668
ABSTRACT:
The disclosure relates to a pump having (a) a wobble plate, (b) a barrel, (c) a pair of piston assemblies reciprocated in the barrel by the wobble plate, and (c) a mechanism retaining the piston assemblies in contact with the wobble plate. In the improvement, the mechanism comprises a yoke member contacting the piston assemblies and a support member mounted to the barrel. The support member has a concave surface and the yoke member has a convex surface contacting the concave surface for bearing support. The support member coacts with the yoke member and permits oscillation of such yoke member in a plane substantially coincident with the barrel central axis. The new hold-down mechanism may be "cascaded" in that the pump may also include another pair of piston assemblies and a second yoke member contacting the second pair of piston assemblies. A bearing component, e.g., a spherical ball, is interposed between the yoke members.
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Dynex/Rivett Inc.
Nguyen Hoang
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