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
2007-07-17
2007-07-17
Charles, Marcus (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
10846378
ABSTRACT:
In a hydraulic tensioner, a check valve assembly comprises a synthetic resin ball guide with a check ball movable therein. Oil grooves are provided in the wall of the ball guide, and minimum clearance is allowed between the ball and the wall of the ball guide. The ball is biased toward a metal ball seat formed as a separate element from the ball guide and attached to the ball guide by crimping portions of the synthetic resin of the ball guide over a flange of the seat, using heat fusion. A metal retainer disc, also a separate element, is similarly attached to the ball guide by crimping using heat fusion. A resilient annular lip is formed on the synthetic resin ball guide, and the assembly is press-fit into a plunger-receiving hole in a tensioner housing with the lip in engagement with the wall of the hole.
REFERENCES:
patent: 4504251 (1985-03-01), Mittermeier
patent: 4792322 (1988-12-01), Goppelt et al.
patent: 5700214 (1997-12-01), Kuznets et al.
patent: 5971015 (1999-10-01), Gonsior
patent: 6086497 (2000-07-01), Fukuda et al.
patent: 6139454 (2000-10-01), Simpson
patent: 6471612 (2002-10-01), Nakakubo
patent: 6811505 (2004-11-01), Hashimoto et al.
patent: 2001/0016530 (2001-08-01), Grunke et al.
patent: 0 919 744 (1999-06-01), None
patent: 1 223 364 (2002-07-01), None
patent: 2854261 (1998-11-01), None
patent: 2000-136860 (2000-05-01), None
patent: 2000-161453 (2000-06-01), None
patent: 2002-206603 (2002-07-01), None
patent: 2002-276747 (2002-09-01), None
patent: 2003-056657 (2003-02-01), None
Hashimoto Hiroshi
Yoshida Osamu
Charles Marcus
Howson & Howson LLP
Tsubakimoto Chain Co.
LandOfFree
Hydraulic tensioner does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic tensioner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic tensioner will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3762232