Hydraulic autotensioner

Details Hydraulic autotensioner Hydraulic autotensioner

1995-07-25

1997-08-05

Schoeppel, Roger J.

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

056536518

ABSTRACT:
A hydraulic autotensioner is arranged so as to include a cylindrical body having a closed end, a plunger slidably mounted in the body and formed with a hole in a top surface thereof, and a rod having a bottom end which is inserted in the hole. The plunger partitions the interior of the cylindrical body into a pressure chamber and a reservoir chamber. The pressure chamber communicates with the reservoir chamber through a return passage. A pressure control spring biases the rod and the plunger in a direction out of the cylindrical body. The return passage is defined by an axial through hole extending through the bottom surface of the plunger. A groove is formed in the inner peripheral surface of the plunger or in a surface of a bottom portion of the rod.

REFERENCES:
patent: 5259820 (1993-11-01), Mott
patent: 5277664 (1994-01-01), Mott
patent: 5304099 (1994-04-01), Deppe et al.
patent: 5366415 (1994-11-01), Church et al.

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