Hydropneumatic cable tensioner

Details Hydropneumatic cable tensioner Hydropneumatic cable tensioner

1985-08-01

1987-01-27

Levy, Stuart S.

Implements or apparatus for applying pushing or pulling force

Portable implements or apparatus for tensioning flexible...

Including expansible chamber fluid motor drive

254277, 254386, 254392, B25B 2500, B66D 150

Patent

active

046389784

ABSTRACT:
A hydropneumatic cable tensioner is comprised of an enclosed cylinder featuring a plurality of annular chambers. A fixed cable sheave is mounted to one end of the cylinder. A movable cable sheave is mounted to a piston rod connected to a piston which reciprocates in a piston bore chamber of the cylinder. Regulated compressed gas is connected to the outer accumulator chamber of the cylinder thereby exerting high pressure forces on oil found in the middle or high pressure oil chamber of the cylinder. Pressurized oil forces a piston to move outwardly thereby increasing the distance between the two sheaves and tensioning a cable and containment chamber within the piston rod. Restriction ports between the piston bore chamber and the containment chamber within the piston rod regulate movement of the piston and prevent uncontrolled acceleration should a cable failure occur.

REFERENCES:
patent: 2588037 (1952-03-01), Orton
patent: 2984211 (1961-05-01), Schneider
patent: 3120157 (1964-02-01), Mello
patent: 3314657 (1967-04-01), Prud'Homme et al.
patent: 3403728 (1968-10-01), Richardson et al.
patent: 3791628 (1974-02-01), Burns et al.
patent: 3792836 (1974-02-01), Bender
patent: 3804183 (1974-04-01), Duncan et al.
patent: 3841607 (1974-10-01), Larralde et al.
patent: 3912227 (1975-10-01), Meeker et al.
patent: 4145959 (1979-03-01), Burden et al.
patent: 4540159 (1985-09-01), Jordan

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