Tensioner or toothed belts
US4909777A · kind A · utility
22Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1989 |
| Grant date | Mar 20, 1990 |
| Priority date | — |
| Expiry date | Feb 14, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2007/0891
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulically actuated tensioner of a toothed belt. A piston slidable with clearance in a cylinder forms front and rear oil-filled chambers communicating through a passage in the piston with a check valve for restricting flow in one direction. A piston rod extending from one end of the piston is urged by a spring, through the front chamber, against a roller to impart tension on the belt. An oil reservoir communicating with the front chamber is enclosed by a spring-biased diaphragm for maintaining the oil pressure in the chambers above atmospheric pressure at all times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.