Heat sensitive locking device
US4263839A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1979 |
| Grant date | Apr 28, 1981 |
| Priority date | — |
| Expiry date | Oct 1, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1819
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A heat sensitive locking device is preferably provided for a fluid actuator of the type which is moved in a direction to one position through the application of fluid pressure and remains in such position unless temperature conditions surrounding the device reach a level indicating that the actuator should be shifted to another position. The locking device comprises a core attachable to an exposed end of, for example, the piston shaft, and an annular collar surrounding such core and attached to the cylinder. A plurality of annular segmental shaped locking members are disposed between the core and collar and pivotally mounted so as to be movable to a locking position or to an unlocked position, each relative to the core. The annular locking elements are held in their locking position by being wrapped by a resilient spring wire, the ends of which are anchored to the locking members by means including a minimal size fusible link.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.