Cage and retainer combination for check valves and slack adjusters using same
US4997411A · kind A · utility
30Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1990 |
| Grant date | Mar 5, 1991 |
| Priority date | — |
| Expiry date | Jan 29, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2007/0891
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A slack adjuster (500) is provided that is particularly advantageous for use in tensioning vehicular timing belts or chains. Adjuster (500) has substantially coaxially aligned status plunger (48), dynamic plunger (74), and sleeve (66). A first check valve (56) controls fluid flow between a first low pressure fluid reservoir or chamber (50) on plunger (48) and a second fluid chamber (84) in plunger (74). A second check valve (80) controls fluid flow between chamber (84) and a third fluid chamber in sleeve 66 includes a passageway (84) and also operates to prevent air from re-entering chamber (82) from passsageway (84).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.