Cushion ring and fluid-pressure cylinder

Details Cushion ring and fluid-pressure cylinder Cushion ring and fluid-pressure cylinder

2011-03-08

2011-03-08

Lazo, Thomas E (Department: 3745)

Motors: expansible chamber type

Working member position responsive motive fluid control

Working member carries part within working chamber which...

C091S405000, C092S08500R

Reexamination Certificate

active

07900549

ABSTRACT:
A cushion ring which is used between a rod-side cylinder head and a piston rod of a fluid-pressure cylinder and which is externally fitted on the piston rod to cushion a shock in the vicinity of the farthest extended end of cylinder includes a throttling groove that has a V-shaped cross section. The throttling groove extends from an appropriate position of the cushion ring to a rod-side end part and functions to throttle the flow of a working fluid flowing from a rod-side fluid chamber to an input/output port provided in a rod-side cylinder head. The throttling groove is provided at the outer periphery of the cushion ring. The throttling groove terminates at a rod-side end part with an end guide face that guides the working fluid toward a slantwise outward direction of the cushion ring.

REFERENCES:
patent: 3704650 (1972-12-01), Berg
patent: 4296675 (1981-10-01), Gies
patent: 4424737 (1984-01-01), Endo
patent: 6523452 (2003-02-01), Dougami
patent: 2002-031106 (2002-01-01), None

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