Winch

Details Winch Winch

1975-06-05

1976-08-31

Spar, Robert J.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Pawl actuated

188 826, A63B 6104

Patent

active

039776522

ABSTRACT:
A spring braking structure for a winch comprises a tubular winch drum having a cylindrical member rotatably mounted therein. A helical spring on an end portion of the cylindrical member has its ends respectively coupled to rotate with the winch drum and the cylindrical member. A support including a brake cylinder is provided for supporting the winch drum with the helical spring inserted in the brake cylinder whose inner diameter is smaller than the outer diameter of the helical spring. The resulting bearing friction of the spring on the inner wall of the brake cylinder locks the winch drum against rotating on the support in one direction only. A rod passes through transverse openings provided on the ends of the rubular winch drum and cylinder member. A turning action in either angular direction on the rod causes the spring to wind up to unlock the winch drum thereby enabling the winch drum to rotate to either take up or pay out a cable wound thereon.

REFERENCES:
patent: 2784810 (1957-03-01), Ulmann
patent: 3542160 (1970-11-01), Sacchini
patent: 3837441 (1974-09-01), Uno et al.

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