Expansible chamber devices – With releasable stop or latch means to prevent movement of... – Means includes element interfitting between working member...
Patent
1994-01-11
1996-02-13
Denion, Thomas E.
Expansible chamber devices
With releasable stop or latch means to prevent movement of...
Means includes element interfitting between working member...
92 28, 91 44, F15B 1526
Patent
active
054904439
ABSTRACT:
A pressure-discharged type retaining system is designed so that supplying and discharging of a high-pressure fluid permits the relative movement of an annular outer member and an inner member inserted and fitted therein in either or both of axial and circumferential directions and retains the outer and inner members stationary. In the prior art, to insure the smoothness and safety of the operation, a high processing accuracy, a measuring accuracy and the like have been required in the production of such a system, resulting in an increased cost. According to the present invention, either one of the adjacent inner and outer members is formed, on its outer or inner surface, with a metal layer which has a predetermined difference in hardness from that of the other member, thereby solving the above subject. The system of the present invention has high reliability and safety and can be conveniently used for retaining the relatively moving components stationary in an operational position or for adjusting the speed of movement of them in any of a crane, a rocket launcher, a hopper, a dam gate, a lifter, a nuclear plant, a crusher, various testing machines and the like.
REFERENCES:
patent: 3150571 (1964-09-01), Frasseto et al.
patent: 3286602 (1966-11-01), Butner et al.
patent: 4534269 (1985-08-01), Scerbo et al.
patent: 4781102 (1988-11-01), Scerbo et al.
patent: 5235896 (1993-08-01), Huber
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