Anti-twist bushing
US5332329A · kind A · utility
Inventors
Key dates
| Filing date | May 14, 1992 |
| Grant date | Jul 26, 1994 |
| Priority date | — |
| Expiry date | May 14, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/5766
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An anti-twist strain relief bushing for use with an exteriorly threaded tubular pipe for nondestructively restraining an electrical cord against axial or torsional displacements. The bushing comprises an interiorly threaded gland nut to be screwed onto the tubular pipe and an insert to be wedged into the pipe by the nut. The gland nut comprises a circular top defining a circular beveled opening, an integral flange spaced apart from the top parallel and concentric with the top, and an internally threaded, tubular body extending from the top to the flange defining a passageway concentric with the beveled opening and the flange. The body has a plurality of radially spaced apart raised ribs longitudinally disposed on its exterior. The underside of the top and the body define an integral, beveled shoulder disposed interiorly within the passageway. The insert comprises two separate, mirror image halves adapted to be folded together when the insert is forced into the pipe. The halves are packaged together by an integral coupling hinge extending between them. The hinge is adapted to guide the halves into proper alignment. The insert comprises a circular collar defining a cord compressive o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.