Torque-multiplying hand wrench
US4546676A · kind A · utility
16Cited by
11References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1984 |
| Grant date | Oct 15, 1985 |
| Priority date | — |
| Expiry date | Apr 16, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B17/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A torque-multiplying hand wrench incorporating the features of a standard ratchet wrench along with a lever action torque multiplying feature. A torque multiplying lever arm is attached to a cam element, the eccentric of which acts upon yoke-shaped actuator when the lever arm is rotated. The actuator interacts with a standard ratchet device to apply torque to a threaded fastener. The handle of the wrench acts either as a standard ratchet wrench handle or as a reaction arm in conjunction with use of the torque multiplying lever arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.