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
1995-05-24
1996-07-23
Mansen, Michael R.
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
254357, 254369, 254372, B66D 114, B66D 130
Patent
active
055382223
ABSTRACT:
The most commonly used spring type chain lever hoists suffer from a major drawback in that, if the chain is drawn quickly over the load sheave while it is set for free running operation, the brake will automatically be applied and the free running movement terminated. Similarly, if a light load is suspended from the chain, the weight of the load may be insufficient to activate the brake with the result that the load will be wound down dangerously quickly, leading on occasion to accidents. The present invention is designed to resolve these potentially fatal flaws by enabling a hub, which screws freely onto a spindle in the conventional manner, to be rotated through a few degrees into a prescribed lock position relative to the spindle and then locked there either temporarily or permanently as required.
REFERENCES:
patent: 2417492 (1947-03-01), Hinchcliffe
patent: 2453581 (1948-11-01), Moore
patent: 3047114 (1962-07-01), Stevens
patent: 3776514 (1973-12-01), Eggleton, Jr. et al.
patent: 4420144 (1983-12-01), Nishimura
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patent: 4819913 (1989-04-01), Nishimura
patent: 5088694 (1992-02-01), Nishimura
patent: 5156377 (1992-10-01), Nishimura
H.H.H. chain lever hoist Table No. M-01 (coil spring type) No date AVL.
H.H.H. Manufacturing Co.
Mansen Michael R.
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