Chain block

Details Chain block Chain block

2007-01-02

2007-01-02

Marcelo, Emmanuel M. (Department: 3654)

Implements or apparatus for applying pushing or pulling force

Apparatus for hauling or hoisting load, including driven...

Device includes rotatably driven, cable contacting drum

C254S345000, C074S575000

Reexamination Certificate

active

11235393

ABSTRACT:
A chain block comprising a load sheave winding up a load chain, a hand wheel arranged on one side of the load sheave and rotatable in one of a normal direction and a reverse direction in response to the manual operation of a hand chain, a pinion shaft inserted through the load sheave along the center axis of the load sheave in a manner allowing the load sheave to be freely rotatable thereabout, one end of the pinion shaft screwed into the center of the hand wheel and the other end of the pinion shaft including a spindle gear, a reduction gear composed of a small-diameter gear and a large-diameter gear, the large-diameter gear in mesh with the spindle gear, a main shaft gear, in mesh with the small-diameter gear, transferring a torque of the reduction gear to the load sheave.

REFERENCES:
patent: 3626499 (1971-12-01), Iwama et al.
patent: 4251060 (1981-02-01), Suzuki et al.
patent: 4420144 (1983-12-01), Nishimura
patent: 4809633 (1989-03-01), Santos
patent: 06-115883 (1994-04-01), None
patent: 07-309591 (1995-11-01), None

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