Hydraulically ratcheted chain tensioner
US9394976B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2014 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Jan 28, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2007/0859
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulically ratcheted tensioner is provided. The tensioner includes a tensioner housing and a plunger including a groove is located partially in a piston chamber in the tensioner housing. The plunger is pressurizable by hydraulic fluid. A ratchet device includes a ratchet housing and a piston having an angled end. A spring biases the piston such that the angled end is forced against a ratchet pin that extends radially through a hole in the ratchet housing and the tensioner housing. The ratchet pin is biased against the piston by a ratchet spring. In a first, non-pressurized state, the ratchet pin engages the groove. In a second, pressurized state, the pressurized hydraulic fluid forces the piston against the spring such that the angled end disengages the ratchet pin and the ratchet spring moves the ratchet pin to a position disengaged from the groove, and the hydraulic fluid pressurizes the plunger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.