Method of installing pipes
US6171435A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1998 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Feb 23, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53652
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A steel service pipe is connected to a main by a tee. A flexible assembly is inserted through the open end of the pipe and through the tee into the main. The flexible assembly includes a section of lower stiffness and a ball and socket connection of even lower stiffness at its leading end. The ball is connected to a weight. The weight falls down on entering the tee and creates a turning moment on the assembly. A plastic pipe is inserted through the open end of the pipe over the assembly and is inserted through the tee into the main. The pipe has a corrugated leading end which is more flexible than the remainder of the pipe and has a tapered nose terminating in a cylindrical mouth which enters an aperture in a liner in the main.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.