Tamper resistant pin connection
US6773304B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2001 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Nov 9, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/3473
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A tamper resistant pin connection for use in a plasma arc cutting apparatus is provided that comprises a plurality of locking fingers within a hollow internal channel of a housing that secure a negative lead gas carrying pin within the housing. The pin comprises a first collar with a shoulder disposed thereon, and accordingly, the locking fingers engage the shoulder to secure the pin within the housing. The pin further comprises a second collar that blocks access to the locking fingers through a first portion of the hollow internal channel such that the locking fingers cannot be accessed to disengage the pin. Further, the pin is recessed within a second portion of the hollow internal channel to prevent further access to the pin for a tamper resistant pin connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.