Lug wrench
US4733583A · kind A · utility
Inventor
Key dates
| Filing date | Jan 22, 1986 |
| Grant date | Mar 29, 1988 |
| Priority date | — |
| Expiry date | Jan 22, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60B29/003
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A lug wrench for loosening and tightening lug nuts on a vehicle wheel having a shaft with a socket at one end and yoke radially extending from the shaft pivotally connected to a moment arm bar such that the shaft can be rotated between a first position at an midpoint of the moment arm bar and the second position substantially at an extremity of the moment arm bar, a remote end of the moment arm bar away from the shaft having a multiplier bar pivotally connected thereto adapted to fold over on to the moment arm bar and attached thereto by means of a retaining clip. When both bars are linearly extended there is mechanical advantage when loosening the lug nut. When the bars are folded upon each other, overtightening is precluded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.