Wrench opening
US4598616A · kind A · utility
Inventor
Key dates
| Filing date | Sep 18, 1985 |
| Grant date | Jul 8, 1986 |
| Priority date | — |
| Expiry date | Sep 18, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/065
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wrench opening (14,14') is disclosed as having particular utility for use with a socket (10) or closed end wrench (34) and includes inwardly convex engagement surfaces (16) defining a closed shape and having continuously curved end portions (16a,16b) that provide greater surface-to-surface engagement with a nut or bolt head to be torqued than is possible with conventional flat engagement surface portions. The curvature of the engagement surfaces (16) is selected to provide maximum surface-to-surface engagement when normal tolerance deviations are involved. Connecting surfaces (20 or 22) extending between the engagement surfaces (16) are constructed to provide improved stress distribution and reduced tooling cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.