Torque adjusting mechanism for power driven rotary tools
US4986369A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1989 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Jul 10, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25F5/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A power driven rotary tool includes a tool housing and an electric motor mounted within the tool housing. A first clutch member is operatively connected to the electric motor. A spindle is rotatably mounted in the tool housing and has a tool bit removably secured to the front end thereof. A second clutch member is operatively connected to the spindle and is shiftable between a first position in which the second clutch member is in driving engagement with the first clutch member and a second position in which the second clutch member is in sliding engagement with the first clutch member. A biasing mechanism is provided for normally biasing the second clutch member into driving engagement with the first clutch member. A control mechanism is disposed in the tool housing for steplessly adjusting the biasing force of the biasing mechanism. A manually-adjustable operating mechanism is provided for operating the control mechanism from outside of the tool. A positioning mechanism is mounted on the tool housing for holding the control mechanism in an operative position adjusting the biasing force of the biasing mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.