Bell end of a bell and spigot joint
US4258935A · kind A · utility
21Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1978 |
| Grant date | Mar 31, 1981 |
| Priority date | — |
| Expiry date | Aug 7, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S285/915
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The bell end of a bell and spigot joint is disclosed herein and includes an end section of a plastic pipe, an axially extending circumferential insert located concentrically within this end section, and a circumferential sealing gasket located within a groove in the inner surface of the insert. A method of making this bell end is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.