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Manual drive mechanism for a winch or similar appliance
| Details |
Inventors: Aronowitsch, Mikael E. G.; Aronowitsch, Stefan E. M.; Lyth, Karl;
Assignee:
Primary Examiner: Matecki; Katherine
Assistant Examiner:
Attorney, Agent or Firm: Nies, Kurz, Bergert & Tamburro
An arrangement for manually driving a winch (1) or like rotatable device, comprising an input rotational shaft (2) which is actuable for driving the rotational device and arranged to rotate an external drum (3) or the like at a given transmission ratio, the arrangement comprising a preferably peg-like drive part (4) which co-acts rotationally with the input shaft without mutual rotation therebetween and further comprises a crank arm (5) or the like intended for co-action with the drive part such as to produce a rotational movement. The arrangement is particularly characterized by devices (12) which transmit rotational movement of the crank arm (5) to the drive part (4) at a given transmission ratio. |
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DETAILED DESCRIPTION We claim: 1.
A manual drive arrangement for use in combination with and for manually driving a winch, said winch including an external drum and a rotational input shaft providing a drive for the winch and arranged to rotate said external drum at a first transmission ratio, the manual drive arrangement being separable from said winch and including a rotatable drive part, means including parts of said drive part and parts of said input shaft for non-rotatably coaxially coupling said drive part and said input shaft and enabling said manual drive arrangement to be coupled to and uncoupled from said drive part by relative axial shifting movement, of the drive arrangement and the drive part, so that the drive arrangement can be readily selectively removed from or placed on the winch, said manual drive arrangement further comprising a crank arm and drive transmission means enabling said crank arm to drivably co-act with said drive part to provide rotational movement to said drive part; wherein said separable manual drive arrangement constitutes a removable unit comprising said drive transmission means (12) connected between said crank arm and said drive part for transmitting rotational movement of the crank arm (5) to said drive part (4) at a second predetermined transmission ratio differing from said first transmission ratio of the winch, said manual drive arrangement further comprising a carrier unit (13) carrying said crank arm (5), said drive part (4) and said transmission means (12); torque reaction retaining means (14, 15) on said carrier unit, essentially non-rotationally mounted relative to the carrier unit; and abutment means at a fixed location relative to the winch enabling said torque reaction retaining means, and the carrier unit to which the retaining means is mounted, to be selectively rendered rotatably stationary by abutting said abutment means during the transmission of rotational movement to the drive part (4) by the crank arm, said winch being a self-tailing which which includes a sheet arm; and said torque reaction retaining means will co-act with said sheet arm (19) of said self-tailing winch
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Lighting 
