Shaft wrench
US6227076A · kind A · utility
Inventor
Key dates
| Filing date | Feb 5, 2000 |
| Grant date | May 8, 2001 |
| Priority date | — |
| Expiry date | Feb 5, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/46
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Wrench structure for placement on over a generally circular workpiece in either a lateral or an axial direction and having a drive head with a cavity formed by a base member and an access cap, a bore formed thru the base member and cap around a rotational axis for accommodating the workpiece, a plurality of gripping jaws pivotally mounted within the cavity and arranged in a substantially circular pattern around the rotational axis and having gripping faces extending at least partially into the bore, each face being knurled and formed substantially on a radius line which makes an angle from about 6.0.degree. to about 25.degree. with a longitudinal axis of the jaw at a lateral midpoint of the face, and each face thereby having a neutral contact portion and a working contact portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.