Ratchet tensioner with mechanism for locking and releasing a plunger
US6454672B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 2001 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Jan 27, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/214
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ratchet tensioner includes a plunger locking and releasing mechanism for selectively locking and releasing a plunger relatively to a ratchet pawl pivotally mounted to a housing. The plunger locking and releasing mechanism has a lever-like pin contact portion formed integrally with a ratchet pawl body, a pin member-fitting hole formed in two opposed side walls of the housing in registry with the lever-like pin contact portion such that there being two pin-accommodating spaces defined between the lever-like pin contact portion and an inner peripheral surface of the pin member-fitting hole on opposite sides of the lever-like pin contact portion, and a pin member removably and selectively inserted in the pin-accommodating spaces. When the pin member is inserted in one of the two pin-accommodating spaces, the ratchet pawl body is turned in one direction to keep the engagement between the ratchet pawl and ratchet teeth formed on the plunger, thereby locking the plunger in position against movement relative to the housing, and when the pin member is inserted in the other pin-accommodating space, the ratchet pawl body is turned in the opposite direction to disengage the ratchet pawl from…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.