Linear motion actuator with spring centering means
US4711158A · kind A · utility
7Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1985 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Dec 11, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01B19/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A vacuum operated actuator is provided with a centering mechanism that operates with a single spring to normally locate the output in a mid-position and also return same from both an extended position and a retracted position. The centering mechanism also includes a connector that may be changed to adjust the output for connection with the device to be actuated without changing the centering and return operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.