Automatic tensioner having locking mechanism

Details Automatic tensioner having locking mechanism Automatic tensioner having locking mechanism

1986-10-29

1987-09-22

Novosad, Stephen 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

046952683

ABSTRACT:
An automatic tensioner for adjusting the tension in a timing belt, V belt, or the like has a locking mechanism. The tensioner has a plunger always biased toward a large oil chamber containing oil. A rod having a head that is pressed against the timing belt or the like is inserted in the body of the tensioner so as to form a small oil chamber. A piston is received in the body of the tensioner. Normally, the piston bears against the plunger. If oil should leak from the large oil chamber, then the plunger will move downward, permitting the piston to engage the rod. Thus, the rod is locked.

REFERENCES:
patent: 4507103 (1985-03-01), Mittermeier
patent: 4527462 (1985-07-01), Okabe
patent: 4539001 (1985-09-01), Okabe

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