Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent
1975-08-15
1977-11-08
Spar, Robert J.
Implements or apparatus for applying pushing or pulling force
Step-by-step traveling bar
Pawl actuated
74523, B66D 100
Patent
active
040572188
ABSTRACT:
A handle apparatus, for use in driving the pawl-actuating lever of a winch-hoist, comprising a pair of telescopically-arranged tubes, means for frictionally securing said tubes in selected positions of telescopic adjustment, and an over-load relieving member for linking said handle apparatus with the lever, and comprising: a rod having one end portion mounted within one of said tube members and an opposite end portion adapted to lie within said lever, when the handle is in use, said latter portion being of reduced cross section in two annular zones spaced along its length, at least a portion of one of said zones lying outside and adjacent said lever when the handle is in use, and the material of which said rod is made, and the cross sectional area of said portion of the last-mentioned annular zone, being so chosen that said portion serves as a protecting link bendable in response to application to said handle of force in excess of a predetermined limit; and further wherein the handle has means for housing a spare link.
REFERENCES:
patent: 2927771 (1960-03-01), Clark
patent: 3101120 (1963-08-01), Huthsing, Jr.
patent: 3279760 (1966-10-01), Bathum, Jr.
patent: 3401574 (1968-09-01), Doolittle
patent: 3707885 (1973-01-01), Profet
B. E. Wallace Products Corporation
Noland Kenneth
Spar Robert J.
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