Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent
1976-12-17
1978-05-09
Hoffman, Drayton E.
Implements or apparatus for applying pushing or pulling force
Step-by-step traveling bar
Pawl actuated
254150FH, 192 12B, B66D 100
Patent
active
040883051
ABSTRACT:
The invention is concerned with an improvement in a winch and fluid control system. The preferred system which is improved comprises (1) a rotatable drum for receiving and releasing a cable (2) a drive train for supporting the drum and for selectively transmitting rotary drive thereto, said drive train including a brake. A source of pressurized fluid, forms another part of said system. Said system further comprises a control valve having an inlet communicating with said source of pressurized fluid, and having an outlet system and a valving element which is shiftable between at least three positions including a Brake-On position, a Reel-In position and a Brake-Off position. The improvement of the present invention comprises a normally engaged one-way clutch intermediate said brake and a stationary support therefor which always allows substantially unrestricted rotation of said drive train relative to said stationary support in a Reel-In direction and normally prevents rotation of said drive train relative to said stationary support in a Reel-Out direction; and means for selectively disengaging said brake to allow substantially unrestricted rotation of said drive train in said Reel-Out direction.
REFERENCES:
patent: 2023679 (1935-12-01), Galkin
patent: 2407811 (1946-09-01), Brundage
patent: 2567526 (1951-09-01), Nitkey
patent: 3685621 (1972-08-01), Gulick et al.
patent: 4004779 (1977-01-01), Flesburg
Allen Norman R.
Wineburner Ronald E.
Caterpillar Tractor Co.
Hoffman Drayton E.
Underwood Donald W.
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