Tensioner for a power transmission belt
US5026330A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1990 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | Mar 15, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2007/0891
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A tensioner is provided for a power transmission belt comprises a tensioning roller with which the belt cooperates, a return spring for controlling the displacement of said roller when the tension of the belt decreases and means for damping the vibrations likely to occur in the belt and comprising two variable volume chambers filled with a liquid and communicating together at one of their ends through a valve device through which the passage of the liquid entering and/or leaving said chambers introduces the damping effect, wherein the sidewall at least of one of the chambers is a membrane made from an elastomer material, such as rubber, having a general bell-shape and without spring, and the return spring associated with the other chamber is formed by a coil spring working under compression, prestressed in its rest state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.