Temperature compensated tensioner

Details Temperature compensated tensioner Temperature compensated tensioner

1992-10-20

1993-08-10

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

474138, F16H 708

Patent

active

052343839

ABSTRACT:
In a fluid tensioner of the piston and cylinder type an annular element is provided either on the piston or on the wall of the cylinder. In the case of an annular element on the wall of the piston, the annular element has a coefficient of linear expansion greater than that of the wall of the cylinder. In the case of an annular element on the wall of the cylinder, the annular element has a coefficient of linear expansion less than that of the piston material. In both cases, the annular element provides compensation for changes in hydraulic fluid viscosity to maintain a constant leak-down rate, allows for flexibility in the choice of piston, rod and cylinder materials.

REFERENCES:
patent: 4708696 (1987-11-01), Kimura et al.
patent: 4911679 (1990-03-01), Inoue et al.
patent: 5073149 (1991-12-01), Maruyama et al.

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