Tapping fittings
US5577529A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 19, 1995 |
| Grant date | Nov 26, 1996 |
| Priority date | — |
| Expiry date | Jan 19, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/56275
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A tapping fitting for a pipe, preferably a plastic pipe, includes a rotatable blade assembly threaded within a sleeve non-rotatably received within a housing such that rotation of the blade assembly causes it to cut a cylindrical slug from the pipe to which the housing is attached. The opposite faces of the sleeve are exposed to the fluid pressure within the pipe thereby producing a balance of forces substantially eliminating transverse creep. In addition, the attaching section of the fitting is formed with a bore which is engageable by a sealing ring received around the rotatable blade assembly and which is of sufficient length to accommodate any axial creep, thereby enabling the blade assembly also to serve as a valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.