Hydraulic tensioner
US9086119B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 2013 |
| Grant date | Jul 21, 2015 |
| Priority date | — |
| Expiry date | Jan 10, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2007/0893
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a hydraulic tensioner, a check valve comprises a check ball disposed within a seat/retainer combination in which a ball seat and retainer are formed as a unit and connected by a bend. The check valve is mounted so that it can rotate within the tensioner housing about a center line, and formed so that its center of gravity is offset from the center line. The check valve unit therefore tends to assume a position in which its center of gravity is directly below the center line. Openings that allow flow of oil from the interior of the check valve unit to a hydraulic chamber in the tensioner are positioned so that, when the center of gravity of the check valve unit is directly below the center line, the check ball cannot block or restrict flow through the openings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.