Implements or apparatus for applying pushing or pulling force – Portable implements or apparatus for tensioning flexible... – Including expansible chamber fluid motor drive
Patent
1992-04-27
1994-01-11
Falik, Andrew M.
Implements or apparatus for applying pushing or pulling force
Portable implements or apparatus for tensioning flexible...
Including expansible chamber fluid motor drive
254264, 114213, 114214, B63B 2100, B66D 150
Patent
active
052774066
ABSTRACT:
A device for limiting the tension in a rope or the like comprises an anchorage plate (8) and a gripping unit (10) containing two piston and cylinder units (34), two gripping members (14) and a hydraulic control circuit which controls the gripping of the rope or the like in a manner dependent on the tension in the rope or the like. Tension P causes the gripping unit (10) and the anchorage plate (8) to separate, thus compressing fluid in chambers (46). This results in the double acting rams (30) biasing the gripping members (14) towards each other under the action of cams (26). If the tension rises above a threshold value the pressurized fluid trips pressure sensitive valve (54) allowing pressurized fluid to reverse reversing valve (55) thus temporarily relaxing the grip on the rope or the like.
REFERENCES:
patent: 3519246 (1970-07-01), Belding
patent: 4072122 (1978-02-01), Balston
patent: 4615509 (1986-10-01), Biass
patent: 4641816 (1987-02-01), Kishida et al.
Falik Andrew M.
The Secretary of State for Defence in Her Britannic Majesty's Go
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