Water tight three piece coupling for electrical conduits
US6832790B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Apr 23, 2003 |
| Grant date | Dec 21, 2004 |
| Priority date | — |
| Expiry date | Apr 23, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L19/0218
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a three piece coupling which has bushing with internal and external threads for assembly on a threaded end of a conduit by its internal threads, a sleeve adapted to fit over a second conduit to be joined by the coupling with internal threads operable to engage the external threads of the bushing to advance the sleeve on the bushing when it is rotated and a collar sized to fit within the sleeve without restricting its rotation, the collar having internal threads for assembly on a threaded end of the second conduit to be connected with the coupling and retained in the sleeve so that the collar is advanced with the sleeve, the improvement including a first seal operable to effect a water tight seal between the bushing and the sleeve and a second seal operable to effect a second water tight seal between the sleeve and a conduit connected to the collar by mechanical compression whereby the coupling joins the conduit components in a water tight joint without rotating the components and without losing conductivity through the coupling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.