Dual push-cable for pipe inspection
US5457288A · kind A · utility
Inventor
Key dates
| Filing date | Feb 22, 1994 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Feb 22, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/555
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A dual push-cable for mechanically and electrically connecting a video camera head to a video circuit to permit the head to be pushed down the inside a pipe and negotiate turns in the pipe as the push cable is forced down the pipe while permitting the video circuit to power and receive video signals from the video camera head. The push-cable comprises an elongate resilient flexible push member, and elongate electrical and/or fiber optic signal transmitting cable, and a hinge joining the push member and the signal transmitting cable in a substantially parallel spaced apart side-by-side relationship. The push member may be a cylindrical rod formed of fiberglass impregnated with epoxy resin. The electrical signal transmitting cable may be armored tri-axial cable. A waterproof jacket of polyethylene, high density polyethylene, polypropylene or copolymer propylene may be extruded around both the rod and cable to form a flexible resilient hinge which extends along the push-cable between the fiberglass rod and the triaxial cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.