Electric cable grounding piercer
US6296501A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1999 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Oct 27, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R4/64
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric-cable-grounding piercer has a piercer blade (1) with a trunk end attached to a double-acting hydraulic piston (2) in a double-acting hydraulic cylinder (3) from which a blade housing (4) is extended from a blade end. An insertion-pressure tube (7) is positional in fluid communication intermediate an insertion-pressure end of the double-acting hydraulic cylinder and a pump-outlet conveyance (36) from a hydraulic pump (9). A withdrawal-pressure tube (10) is positional in fluid communication intermediate a withdrawal-pressure end of the double-acting hydraulic cylinder and the outlet conveyance from the hydraulic pump. The hydraulic pump has a control valve (35) for directing pressurized hydraulic fluid to the insertion-pressure end and to the withdrawal-pressure end of the double-acting hydraulic cylinder selectively. The piercer blade has electrical communication with electric cable (6) being pierced for transmission to a ground-line connector (12) to which a ground line (13) is connectable for releasing residual current from the electric cable in preparation for work on the electric cable. An insertion-depth indicator (44) attached to the piercer blade is visible throug…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.