Wrench assisting tool and method
US5528964A · kind A · utility
Inventor
Key dates
| Filing date | Jul 15, 1994 |
| Grant date | Jun 25, 1996 |
| Priority date | — |
| Expiry date | Jul 15, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60B29/005
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A torque multiplying assist tool engages and pivots about a fulcrum to assist a conventional wrench in operating upon a work-piece. The assist tool functions as a secondary lever by receiving an applied force, pivoting about the fulcrum, and exerting a multiplied force upon the wrench. The wrench includes a grip element that is engaged to the work-piece and a handle extending from the grip element. The multiplied force is applied by way of a linkage assembly to the handle of the wrench causing the wrench to pivot such that torque is applied to the work-piece. In accordance with the preferred embodiments of the present invention, the assist tool is constructed and arranged to cooperate with the wrench to aid in the removal of a lug nut from a vehicle wheel. The work-piece is a lug nut (i.e., a primary lug nut) on the wheel and the fulcrum is another lug nut (i.e., a secondary lug nut) on the same wheel. The assist tool includes a pivot assembly for engaging and pivoting relative to the secondary lug nut and a handle extending from the pivot assembly. In accordance with the first preferred embodiment of the present invention, the linkage assembly extends between the handle of the ass…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.