Chain with improved rocker pin joint structure
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United States of America Patent
Stats
-
May 14, 2002
Grant Date -
Jun 21, 2001
app pub date -
Dec 18, 2000
filing date -
Dec 16, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A chain includes a pair of rocker joint pins inserted through laterally aligned pin holes of two adjacent link plates. The pin holes have a pair of upper and lower pin-position constraining surfaces arranged to face upper and lower flat surfaces, respectively, of each rocker joint pin with a very small clearance defined therebetween so that the rocker joint pin is always kept in position against displacement in a vertical direction relative to the link plates. When the chain is urged to warp or bend into a V shape, each of the rocker joint pins is gripped by the upper pin-position constraining surface of one of the two adjacent link plates and a warp blocking surface of the other of the two adjacent link plate. Thus, such warping of the chain does not take place.
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