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
2011-08-30
2011-08-30
Kim, Sang (Department: 3654)
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
C474S111000, C474S115000
Reexamination Certificate
active
08007384
ABSTRACT:
In a hydraulic tensioner having a coiled plunger-biasing spring, the volume of the high pressure oil chamber is reduced by incorporating a bar inside the spring. One of both ends of the spring are formed to block passage of the bar, so that the bar and spring can be installed as a pre-assembled unit, and dropping of the bar out of the spring can be avoided.
REFERENCES:
patent: 5346436 (1994-09-01), Hunter et al.
patent: 6117033 (2000-09-01), Simpson
patent: 6716124 (2004-04-01), Markley
patent: 7037229 (2006-05-01), Hayakawa et al.
patent: 7691017 (2010-04-01), Seungpyo et al.
patent: 2002/0065159 (2002-05-01), Markley
patent: 2004/0087399 (2004-05-01), Hayakawa et al.
patent: 2005/0227799 (2005-10-01), Yoshida
patent: 2005/0239589 (2005-10-01), Seungpyo
patent: 2007/0243961 (2007-10-01), Aimone
patent: 2007/0287562 (2007-12-01), Assel
patent: 2009/0209376 (2009-08-01), Kurematsu et al.
patent: 2009/0209377 (2009-08-01), Kurematsu et al.
patent: 2009/0209378 (2009-08-01), Kurematsu
patent: 103 27 024 (2004-01-01), None
patent: 10 2007 023 671 (2007-12-01), None
patent: 10 2007 036 119 (2008-07-01), None
patent: 20 2007 002 456 (2008-08-01), None
patent: 20 2007 004 988 (2008-09-01), None
patent: 04-157220 (1992-05-01), None
patent: 4-78360 (1992-08-01), None
patent: 07-158703 (1995-06-01), None
patent: 2000-145903 (2000-05-01), None
patent: 2005-299783 (2005-10-01), None
Yuji Kurematsu and Takeshi Ogawa, Hydraulic Tensioner, U.S. Appl. No. 12/354,292, filed Jan. 15, 2009.
Yuji Kurematsu, Hydraulic Tensioner, U.S. Appl. No. 12/354,909, filed Jan. 16, 2009.
Kurematsu Yuji
Shigematsu Katsuji
Howson & Howson LLP
Kim Sang
Tsubakimoto Chain Co.
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