Expansible chamber devices – Relatively movable working members – Interconnected with common rotatable shaft
Reexamination Certificate
2007-06-05
2007-06-05
Lazo, Thomas E. (Department: 3745)
Expansible chamber devices
Relatively movable working members
Interconnected with common rotatable shaft
C091S491000
Reexamination Certificate
active
11156815
ABSTRACT:
The motor comprises a cam and a cylinder block mounted to rotate one relative to the other. The cam comprises a plurality of cam lobes and the cylinder block has a plurality of cylinders slidably receiving pistons that are suitable for co-operating with the cam. The motor further comprises a fluid distributor that includes distribution ducts suitable for being connected to a feed or to a discharge and disposed in register with the rising ramp and with the falling ramp of the cam lobes. The motor is a substantially constant-velocity motor. In any relative position of the cylinder block and of the cam, there is at least one cam lobe that is unused and with which no piston co-operates, and the angular spacings between consecutive cylinders are mutually different and differ from a multiple of the smallest angular spacing between consecutive cylinders, the angular spacings being determined so that the resultant of the forces exerted by the pistons on the cam is small or substantially zero.
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patent: 2834012 (2003-06-01), None
Ladas & Parry LLP
Lazo Thomas E.
Poclain Hydraulics Industrie
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