Hydraulic tensioner of the hollow piston type with a...

Details Hydraulic tensioner of the hollow piston type with a... Hydraulic tensioner of the hollow piston type with a...

2006-05-23

2006-05-23

Charles, Marcus (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

C474S109000

Reexamination Certificate

active

07048662

ABSTRACT:
A cartridge tensioner (10) for drive transmission belts and chains comprises a cylinder (12) with a cylinder bore, a piston (14) slidably received in the cylinder bore and provided with a piston bore (40), a vent device (16) housed in the piston bore and comprising an end part and a stem integral with each other, a pressure spring (18) acting between a shoulder of the cylinder and the vent device, and a retaining device (20), accessible from the outside of the cylinder. The retaining device, in a position engaged with the stem of the vent device, retains the vent device preventing the action of the spring on the piston, and, in a position of disengagement from the stem of the vent device, allows the spring to bias the device against the piston and to act consequently on the piston.

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patent: 09079330 (1997-03-01), None

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