Shut-off apparatus for pneumatic driven tools
US4307784A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 17, 1979 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Jan 17, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/145
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The improved shut-off apparatus for pneumatically driven tools includes an auxiliary shut-off valve located in the flow passageway. The valve is controlled by a control rod which extends through the air motor into engagement with a latching device. The latching device is held in the latched position with the valve open by a movable weighted control member. The movable weighted control member is responsive to inertia so that as the speed of the air motor decreases due to a torque load imposed thereon, the shaft slows causing the inertial movement of the weighted member to release the latching device permitting the auxiliary shut-off valve to close.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.