Lever hoist
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 9, 2000
Grant Date -
N/A
app pub date -
Dec 9, 1998
filing date -
Jul 7, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hoist is a hoisting device wherein a pressure receiving member 6 rigidly secured to a drive shaft 5 is rotated by a press drive member 7 through a reverse rotation stop ring 10 and a pair of friction members 8,9 disposed on both sides of said stop ring. The member 7 is formed with a spring-loading hole 71 opening at the axially base side for accepting the tip 13d of a left hand coil spring 13 and a second engaging groove 7e opening at the axially base side extending radially outwardly. The groove 7e is inclined in the wind-down direction as it approaches the axially forward surface. The angle .alpha. formed between the wind-down directional inclined surface 7k of said groove 7e and the axially backward surface 7j of said member 7 is an acute angle.
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