Hydraulic radial piston motor

Details Hydraulic radial piston motor Hydraulic radial piston motor

2007-03-06

2007-03-06

Gartenberg, Ehud (Department: 3746)

Expansible chamber devices

Relatively movable working members

Interconnected with common rotatable shaft

C091S492000, C091S491000, C091S498000

Reexamination Certificate

active

10499947

ABSTRACT:
A hydraulic motor having radial pistons, and comprising a cam, a cylinder block and a distributor. The cylinders of the cylinder block are connected to communication orifices (32A) situated in a communication face of the cylinder block, while the distributor has a distribution face in which distribution orifices (21A,23A) are provided that are suitable for communicating with the communication orifices for rotating the motor. The cam is provided with a plurality of lobes (50, 50′), each of which has two ramps (51, 52), each ramp corresponding to a distribution orifice (21A,23A). The edge of each of at least certain communication orifices (32A) has at least one notch (54A,54B) suitable for establishing a small section of communication with a distribution orifice. The invention applies in particular to hydraulic motors having radial pistons for which the ratio between the number of cylinders and the number of cam lobes is in the vicinity of1.

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