Endless belt power transmission systems or components – Means for adjusting belt tension or for shifting belt,... – Tension adjuster or shifter driven by electrical or fluid motor
Reexamination Certificate
2007-05-29
2007-05-29
Ridley, Richard (Department: 3682)
Endless belt power transmission systems or components
Means for adjusting belt tension or for shifting belt,...
Tension adjuster or shifter driven by electrical or fluid motor
C474S109000
Reexamination Certificate
active
11304480
ABSTRACT:
In a hydraulic chain tensioner for an engine timing drive, an annular groove is formed on an outer circumferential surface of a plunger, and a friction ring is disposed in the groove. The friction ring is composed of an external resin ring and an internal steel ring incorporated into the inside of the resin ring. The friction ring is fitted into the annular groove of the plunger with a predetermined axial clearance. It allows the tensioner to operate with good responsiveness during normal engine operation, but resists excessive slack in the chain, and prevents backlash and fluttering, during engine start-up.
REFERENCES:
patent: 3223426 (1965-12-01), Reid
patent: 3911957 (1975-10-01), McQueen
patent: 5700213 (1997-12-01), Simpson et al.
patent: 5707309 (1998-01-01), Simpson
patent: 5781375 (1998-07-01), Honma
patent: 5799953 (1998-09-01), Henderson
patent: 6361458 (2002-03-01), Smith
patent: 6935978 (2005-08-01), Hayakawa et al.
patent: 2001/0003279 (2001-06-01), Brandl et al.
patent: 1 197 679 (2002-04-01), None
patent: 2 414 777 (2005-12-01), None
patent: 2003-329091 (2003-11-01), None
patent: 2004-138152 (2004-05-01), None
patent: 2005-344887 (2005-12-01), None
U.S. Appl. No. 11/083,411, filed on Mar. 18, 2005.
Howson & Howson LLP
Pilkington James
Ridley Richard
Tsubakimoto Chain Co.
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