Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
255 words
An idling device for a lever hoist comprising; a change gear provided on a driving member threadedly engaged on a driving shaft for driving a sheave winding up a chain, rope or the like thereabout for a load, an operating lever rockable about said driving member by hand, a winding-up driving pawl engageable with teeth of said change gear and driven by said operating lever in a winding-up direction for the load, a winding-off driving pawl engageable with the teeth of said change gear and driven by said operating lever in a winding-off direction for the load, a braking assembly preventing said change gear from being driven from a side of said sheave and being clamped and released by rotative movement of said driving member relative to said driving shaft, an anchoring member fixed to said driving shaft, a manually operatable knob for manually driving said driving member from a brake clamping position to a brake releasing position and vice versa, and anchor operating means engageable with said anchoring member to clamp said knob relative to said driving shaft; wherein said anchoring member is fixed at one end of said driving shaft and said knob is rotatably and axially slidably fitted on said driving shaft between said anchoring member and said driving member, and wherein said anchor operating means is fitted in an aperture formed in said knob radially slidably therein toward and away from said anchoring member and is provided with friction increasing means for frictionally holding the anchor operating means in desired positions.
Claim 2
Dependent Claim
255 words
An idling device for a lever hoist comprising; a change gear provided on a driving member threadedly engaged on a driving shaft for driving a sheave winding up a chain, rope or the like thereabout for a load, an operating lever rockable about said driving member by hand, a winding-up driving pawl engageable with teeth of said change gear and driven by said operating lever in a winding-up direction for the load, a winding-off driving pawl engageable with the teeth of said change gear and driven by said operating lever in a winding-off direction for the load, a braking assembly preventing said change gear from being driven from a side of said sheave and being clamped and released by rotative movement of said driving member relative to said driving shaft, an anchoring member fixed to said driving shaft, a manually operatable knob for manually driving said driving member from a brake clamping position to a brake releasing position and vice versa, and anchor operating means engageable with said anchoring member to clamp said knob relative to said driving shaft; wherein said anchoring member is fixed at one end of said driving shaft and said knob is rotatably and axially slidably fitted on said driving shaft between said anchoring member and said driving member, and wherein said anchor operating means is fitted in an aperture formed in said knob radially slidably therein toward and away from said anchoring member and is provided with friction increasing means for frictionally holding the anchor operating means in desired positions.
Claim 3
Dependent Claim
41 words
An idling device as set forth in claim 1, wherein said friction increasing means comprises an annular groove formed in said anchor operating means and an elastic member received in said annular groove and frictionally engaging said aperture of said knob.
Claim 4
Dependent Claim
61 words
An idling device as set forth in claim 2, wherein in said anchoring member is formed a holding groove for receiving an inner end of said anchor operating means when said knob is clamped, so that radially extending heights of said anchor operating means from said knob indicate whether said brake assembly is in an idling position or a non-idling position.