Hydraulic tensioner with relief valve
US6398682B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2000 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Jun 27, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2007/0859
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic tensioner includes a relief valve provided at a projecting end portion of a plunger. The relief valve has a pressure path communicating with a high pressure oil chamber, a valve body fitted for sliding movement in the pressure path, a spring for normally biasing the valve toward the high pressure oil chamber, and an outlet port communicating, when the valve body is moved back against the force of the spring, with the pressure path. The valve body is formed as a unitary member including a slidably movable portion fitted for sliding movement in the pressure path and acted upon by a hydraulic pressure of the high pressure oil chamber, and a flange portion having a cross sectional area greater than that of the slidably movable portion for being acted upon by the force of the spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.