Cushion ring and fluid-pressure cylinder
AssigneesKayaba Industry Co., Ltd., Yanagisawa Seiki Mfg. Co., Ltd.
InventorNobuyuki Kobayashi
Life of this patent
Estimating the term…
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.
Claims2
A cushion ring which is used between a rod-side cylinder head and a piston rod of a fluid-pressure cylinder and is externally fitted on the piston rod to cushion a shock in the vicinity of the farthest extended end of cylinder, wherein
- a throttling groove having a V-shaped cross section, which extends from an appropriate position of the cushion ring to a rod-side end part to throttle the flow quantity of working fluid flowing from a rod-side fluid chamber to an input/output port provided in a rod-side cylinder head, is provided at the outer periphery of the cushion ring, and
- an end guide face for guiding the working fluid flowing in the throttling groove toward the slantwise outward direction of the cushion ring is provided in the rod-side end part of the throttling groove.
Dependencies are inferred from the claim text.