Hand operated chain block
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 21, 1989
Grant Date -
N/A
app pub date -
Aug 24, 1988
filing date -
Feb 29, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hand-operated chain block having a hand chain wheel portion light in weight and simplified in construction and which permits safe and smooth hand chain operation. A hand chain wheel cover having a leftwardly laid-down U-shaped configuration which covers the upper, lower, and front portions of the hand chain wheel is mounted on a plurality of stays disposed on side plates of a chain block body, and hand chain guide plates are mounted on the upper right and left ones of the stays so as to cover substantially entire periphery of the hand chain wheel. Each of the hand chain guide plates is formed of one metal plate in a folded pattern. A pivotal support portion formed in a crooked pattern on the top end portion of each hand chain guide plate is inserted through one of the upper stays. Thus, each hand chain guide plate is pivotally suspendingly supported, while a hand chain wound around the hand chain wheel is inserted through a hand chain guide portion formed at the lower end portion of the hand chain guide plate for being thereby guided.
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