Hydraulic chain tensioner

Details Hydraulic chain tensioner Hydraulic chain tensioner

1993-03-12

1994-04-19

Bui, Thuy M.

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

F16H 708

Patent

active

053040996

ABSTRACT:
A hydraulic chain tensioner including a retractable ratchet mechanism. A ratchet pawl in the form of a cylindrical plunger received in a bore formed in the tensioner housing is normally biased into engagement with grooves formed on the output member of the tensioner. The bore is in communication with a source of pressurized engine oil so that when the engine is operating the force produced by the oil pressure acting against the plunger overcomes the biasing force and disengages the plunger from the output member. When the engine is stopped the oil pressure goes to zero and the biasing force is again effective to move the plunger into engagement with the output member to maintain its axial position.

REFERENCES:
patent: 3011485 (1961-12-01), Van Slooten
patent: 4772251 (1988-09-01), Goppelt et al.
patent: 4874352 (1989-10-01), Suzuki
patent: 4985009 (1991-01-01), Schmidt et al.
patent: 5030169 (1991-07-01), Kiso et al.
patent: 5073150 (1991-12-01), Shimaya
patent: 5087225 (1992-02-01), Futami et al.
patent: 5181889 (1993-01-01), Maruyama et al.

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