Safety shut-off for swing bar tools
US4474279A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1982 |
| Grant date | Oct 2, 1984 |
| Priority date | — |
| Expiry date | Jun 24, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27B17/083
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A safety shut off mechanism for a fluid-powered motor comprises a reaction torque structure tending the rotate in a direction opposite to the direction of rotation of the motor under load a swing-bar for normally restraining the reaction torque structure against rotation, a reference structure for providing a point of reference as to movement of the reaction torque structure, a locking structure actuated by fluid pressure for locking the reference structure against rotation, a retaining structure tending to retain the reaction torque structure and the reference structure in a predetermined orientation relative to each other, and a shut-off structure for depriving the motor of the motive force of the fluid in response to relative movement between the reaction torque structure and the reference structure upon failure of the swing-bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.