Hand-operated chain block
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 30, 1992
Grant Date -
N/A
app pub date -
Aug 29, 1990
filing date -
Aug 29, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hand-operated chain block which is lightweight and simplified in the structure of the hand chain wheel portion, and safe and smooth in the hand chain operation is provided with a hand chain wheel cover for covering the upper, lower and front parts of the hand chain wheel, and a hand chain guide cover for covering the sides of the hand chain wheel such that the entire circumference of the hand chain wheel is covered. The hand chain guide cover is a one-piece body folded and formed from one metal plate, comprising drooping parts for guiding the UP side and DOWN side of the hand chain, and a bottom part for coupling the lower ends of the drooping parts. Upper support parts are formed in the upper end portions of the drooping parts and are inserted and supported on the upper stays, and a lower support part formed in the middle of the bottom part of the hand chain guide cover is positioned and supported on the lower stay. The hand chain wound on the hand chain wheel is inserted and guided in the hand chain inserting holes formed in the side portions of the bottom part of the hand chain guide cover.
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