Fluid pressure device and shuttle valve assembly therefor

Details Fluid pressure device and shuttle valve assembly therefor Fluid pressure device and shuttle valve assembly therefor

1980-04-21

1982-08-10

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Plural working members or chambers

137112, 251 31, F01C 2116, F03C 208, G05D 1100, F16K 31122

Patent

active

043436013

ABSTRACT:
A rotary fluid pressure device is disclosed of the type including a valve housing (19) defining a pair of fluid ports (41,43) and a shuttle port (85). The device includes a fluid pressure actuated displacement mechanism (15), and a rotatable valve member (53) which provides fluid communication from one of the ports to expanding volume chambers (27) of the displacement mechanism, and from the contracting volume chambers to the other fluid port. The device includes a shuttle valve assembly including a shuttle piston (97) having end portions (103,105) disposed within a pair of fluid chambers (77,79). A dampening sleeve (115,121) is disposed about each end portion of the piston and cooperates therewith to define a dampening orifice (127,129) to prevent hunting during low pressure operation. The sleeves are radially movable within the fluid chambers to receive the end portion of the piston therein without concentricity problems, but each sleeve includes a flange portion (117,123) to limit radial movement and guide the shuttle assembly during axial movement.

REFERENCES:
patent: 2781639 (1957-02-01), Badalini
patent: 3863449 (1975-02-01), White, Jr.
patent: 4040439 (1977-08-01), Uppal

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