Pipe coupler
US4229028A · kind A · utility
21Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1978 |
| Grant date | Oct 21, 1980 |
| Priority date | — |
| Expiry date | Dec 20, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L21/022
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A coupler for connecting adjacent ends of clay pipe with a generally cylindrical flexible sealing member of urethane or the like having opposing inner and outer central grooves which extend circumferentially and pairs of circumferentially extending outer support grooves flanking the outer central groove. Rigid rings of fiberglass are provided in the grooves. The central ring has an inwardly extending stop portion and unitary sealing lips are provided on the interior surface of the sealing members between the support grooves of each pair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.