Chain tensioner

Details Chain tensioner Chain tensioner

1997-04-16

1999-03-09

Marmor, Charles A.

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

474101, 474135, 474138, F16H 708

Patent

active

058792554

ABSTRACT:
A chain tensioner including a housing having a cylinder chamber, a rod member in the form of a threaded shaft inserted in the cylinder chamber for tensioning a chain, a tension adjusting spring for biasing the rod member outwardly of the housing, a hydraulic damper for damping axial dynamic load applied to the rod member from the chain by utilizing as a damping medium a hydraulic oil supplied into a closed end of the cylinder chamber through an oil supply passage formed in the housing and a check valve, and a thread engagement arrangement for preventing the rod member from retracting under an axial static load applied to the rod member. The chain tensioner can prevent the entry of air in the pressure chamber of the hydraulic damper when the engine is started in a cold environment or restarted.

REFERENCES:
patent: 5154091 (1992-10-01), Bianco
patent: 5383813 (1995-01-01), Odai
patent: 5632474 (1997-05-01), Hayakawa et al.
patent: 5637047 (1997-06-01), Schulze
patent: 5704860 (1998-01-01), Stief
patent: 5713809 (1998-02-01), Yamamoto

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