Tensioner with spring having nonlinear characteristics

Details Tensioner with spring having nonlinear characteristics Tensioner with spring having nonlinear characteristics

1996-08-06

1997-05-20

Schoeppel, Roger J.

Endless belt power transmission systems or components

Means for adjusting belt tension or for shifting belt,...

Pulley or guide roll has eccentric mount for shifting or...

474135, F16H 710

Patent

active

056307683

ABSTRACT:
A tensioner includes a plunger slidably inserted in a housing and biased by spring means. The spring means include sequentially operable first and second portions in which the first portion has a relatively larger pitch and large spring modulus and the second portion has a relatively small pitch and small spring modulus. When the spring means is depressed a certain degree, the coils of the second spring portion 16 will move into close contact with each other to vary the spring modulus. Thus, the amount of backward movement and jutting out speed of the plunger will be decreased, thereby a required tensile force will be given to a belt, or the like, without delay.

REFERENCES:
patent: 3673884 (1972-07-01), Southiere
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patent: 4904230 (1990-02-01), Kawashima et al.
patent: 4940447 (1990-07-01), Kawashima et al.
patent: 4976661 (1990-12-01), Ojima
patent: 5021032 (1991-06-01), MacChiarulo et al.
patent: 5037357 (1991-08-01), Ojima
patent: 5073158 (1991-12-01), Ojima
patent: 5181889 (1993-01-01), Maruyama et al.

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