Power transmission chain and power transmission device

Endless belt power transmission systems or components – Friction drive belt

Reexamination Certificate

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Details

C474S206000, C474S215000, C474S216000, C474S229000, C474S230000, C474S242000

Reexamination Certificate

active

07874952

ABSTRACT:
A power transmission chain includes a plurality of links aligned in a chain travel direction and a coupling member that includes a first power transmission member and a second power transmission member. The first power transmission member includes an opposing portion that opposes the corresponding second power transmission member and contacts the corresponding second power transmission member on a contact portion that undergoes displacement in association with a change of a bending angle between corresponding links in a contact state including at least one of rolling contact and sliding contact. The opposing portion includes an arc-shaped portion having a predetermined radius of curvature and a rate-of-change increasing portion. The arc-shaped portion includes a portion that forms the contact portion when the bending angle is equal to or greater than zero and equal to or smaller than a predetermined boundary angle.

REFERENCES:
patent: 5728021 (1998-03-01), van Rooij et al.
patent: 7306532 (2007-12-01), van Rooij et al.
patent: 2002/0068654 (2002-06-01), Baumann et al.
patent: 2005/0209035 (2005-09-01), Oberle et al.
patent: 2006-2784 (2006-01-01), None
patent: 2006-57722 (2006-03-01), None
patent: 2006-214508 (2006-08-01), None
patent: 2006-226405 (2006-08-01), None

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