Apparatus for closing side openings into pipelines
US4144909A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1975 |
| Grant date | Mar 20, 1979 |
| Priority date | — |
| Expiry date | Jun 25, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/11
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In one exemplar embodiment, a combination closure conduit and closure plug are provided for closing a side opening into a pipeline. The closure stub or conduit is attached to the pipeline around the side opening and has an interior annular shoulder. A closure plug adapted for insertion into the conduit has a projecting peripheral shoulder and provides a first sealing means. A peripheral sealing means disposed on the plug ahead of the peripheral shoulder provides a second means of sealing the plug to the conduit. Locking screws engage a peripheral surface on the top of the plug to lock the plug in place. A by-pass valve is carried by the plug to allow fluid communication through the plug during insertion of the plug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.