Patent · US Expired

Tapping valve

US6758237B2 · kind B2 · utility

13Cited by

16References

20Claims

0Family size

Assignee

Friatec Aktiengesellschaft · DE

Inventors

Wolfgang Sichler · Mannheim, DE
Matthias Fastanz · Mannheim, DE
Fabian Maier · Wassertrüdingen, DE
Gerhard Mueller · Freilassing, DE

Key dates

Filing date	Dec 16, 2002
Grant date	Jul 6, 2004
Priority date	—
Expiry date	Dec 16, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/907
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A tapping valve having a housing which can be electrically welded to a pipe and which includes a connection piece (2) with a drill (24) therein for drilling the pipe. The connection piece has an inner surface (34). The drill or a bushing (70) in which the drill can be moved axially by a threaded connection (74, 76; 80, 82) is provided with an external thread which engages the inner surface of the connection piece. Inner surface (34) is constructed such that it is initially cylindrical adjacent the external thread (32) and an inner thread can be formed in the inner surface (34) using the external thread (32) by rotating the drill (24) or the thread (70) in an axially forward direction (30). The tapping valve is easy to manufacture and yet offers a high degree of functional reliability.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.