Blank duct plug
US4968197A · kind A · utility
31Cited by
5References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1989 |
| Grant date | Nov 6, 1990 |
| Priority date | — |
| Expiry date | Sep 19, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/132
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pipe plug is disclosed which includes a disc-like screw plate, an elastic sealing ring, a horn-like pressure block, and a lifting eye. The screw plate receives the bottom edge of the sealing ring and the horn-like pressure block is mounted on the upper edge. The screw plate has a central rod that extends upwardly through a hole in the pressure block. The lifting eye is then threadedly received on the end of the rod and as the lifting eye is turned, the block and plate will be urged together causing the sealing ring to expand against the internal wall of a pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.