Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Patent
1982-09-22
1986-03-11
Levy, Stuart S.
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
254382, 254374, B66D 136, B66D 300
Patent
active
045750505
ABSTRACT:
In a portable cable winch the smooth shell of a motor-driven cable drum is provided with at least one conical surface having an angle of inclination corresponding to the angle of friction between the load-bearing cable and the cable drum. A clamping disk driven in synchronism with the cable drum pulls the load-bearing cable away from the smaller-diameter end of the conical surface and towards a cable storing means. The cable has applied thereto a clamping force which is transmitted as a pulling force back to the cable section to be drawn in via the conical surface. In an embodiment in which the shell of the cable drum is subdivided into two conical surfaces having identical angles of inclination but being disposed on the axis of the cable drum extending in opposite directions, it is possible also to employ the cable winch for raising and lowering loads upon the direction of rotation of the cable drum being reversed to alternatingly guide the cable onto the one or the other of the two conical surfaces. In both cases the cable drum is operated as a pull-through drum so as to prevent the individual turns of the cable from being superimposed, with the result that it is possible to drive the drum independently of the length of the cable by applying a constant invariable torque thereto.
REFERENCES:
patent: 42864 (1864-05-01), Morgan
patent: 3300187 (1967-01-01), Saxe et al.
patent: 3957217 (1976-05-01), Clemens
patent: 4225118 (1980-09-01), Ottemann
patent: 4225119 (1980-09-01), Frommherz
patent: 4381807 (1983-05-01), Umezawa et al.
Jaekel Katherine
Levy Stuart S.
Rotzler GmbH & Co.
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