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
2006-10-20
2008-10-28
Johnson, Vicky A (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
Reexamination Certificate
active
07442138
ABSTRACT:
In a ratchet type chain tensioner, having a toothed rack on its plunger and a pawl cooperable with the rack, a recess is provided between the front end of the rack and the protruding end of the plunger. In the initial stages of operation of the tensioner, the pawl can enter the recess while permitting the plunger to protrude and retract freely within a limited range. Thereafter, when the chain controlled by the tensioner becomes elongated, the pawl cooperates with the rack to limit retraction of the plunger.
REFERENCES:
patent: 3484831 (1969-12-01), Higuchi
patent: 3710634 (1973-01-01), Tamaru et al.
patent: 4125287 (1978-11-01), Paulisch
patent: 5908363 (1999-06-01), Suzuki
patent: 6478703 (2002-11-01), Suzuki
patent: 2007/0072713 (2007-03-01), Slopsema et al.
patent: 2646938 (1990-11-01), None
patent: 2001-214957 (2001-08-01), None
patent: 2004-308624 (2004-11-01), None
Kurokawa Yoshio
Marx Timothy
Minami Yutaka
Mori Kaori
Sugasawa Shigenobu
Howson & Howson LLP
Johnson Vicky A
Tsubakimoto Chain Co.
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