Looped strap wrench for rotating cylindrical objects
US4646593A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 16, 1986 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Jan 16, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/50
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
This invention provides an improved and simplified tool for rotating a cylindrical object as conventionally accomplished by a pair of pliers or a pipe wrench, but protecting the circumference of the object from damage. A standard length of rod having a polygonal cross section the sides of which intersect at sharply defined fulcrum points, generally square or hexagonal, from a conventional socket wrench set will make it perform the additional function as a multipurpose tool simply by extending an axial slit inwardly from one end to receive thereinto a flexible strap forming a loop about the cylindrical object. The polygonal shape provides fulcrum corners gripping the strap as it is wrapped about the rod to tightly grip and rotate the cylindrical object and thus prevent circumferential slip which together with elasticity in the strap significantly reduces the leverage necessary to rotate the cylindrical objects with small diameter rods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.