Fluid handling – With repair – tapping – assembly – or disassembly means – Tapping a pipe – keg – or apertured tank under pressure
Patent
1993-10-15
1994-09-20
Walton, George L.
Fluid handling
With repair, tapping, assembly, or disassembly means
Tapping a pipe, keg, or apertured tank under pressure
138153, 285197, F16K 4300, F16L 4106
Patent
active
053480457
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION
The invention is directed to a pipe clamp of the type, which is given in the introductory portion of claim 1 and used, in particular, as tapping clamp. A plastic upper shell of the clamp, which is constructed in one piece with a pipe socket or a T-piece pipe, is welded to the desired position in the supply pipeline. The supply pipeline can then be tapped into the interior of the pipe socket and closed.
BACKGROUND INFORMATION AND PRIOR ART
In the case of the known pipe clamp of this type, a tubular metal insert was seated at the pipe inner surface in the pipe socket, which had an internal thread towards the interior of the pipe. This internal thread was used for screwing in functional parts, such as a sleeve-shaped drill, which is in threaded engagement with the metal insert and has, at its lower front end, a cutting edge for severing the pipe wall of the supply pipeline. The handling of the functional parts in the interior of the pipe was cumbersome. The plastic in the region of the pipe socket stretched in the longitudinal direction when stressed and was able to flow away. Moreover, the connection of the metal insert to the pipe socket was in danger of breaking.
OBJECT OF THE INVENTION
It is an object of the invention to provide an attractively priced pipe clamp of the type described in the introductory portion of claim 1, which is convenient to handle and is distinguished by its high dimensional stability and by its strength. Pursuant to the invention, this is achieved by measures listed in the characterizing part of claim 1, to which the following special importance is attached.
SUMMARY OF THE INVENTION
As metal insert, the invention uses a special, one-piece construction, which is organized in two axial sections, different in shape and action, of which the lower axial section is referred to hereinafter in short as "foot section" and the upper axial section as "head section". Whereas the foot section is firmly anchored in the pipe socket, the head section freely protrudes out of the upper front end of the pipe socket and carries the internal thread. The internal thread now precedes the plastic pipe socket and therefore is conveniently accessible for handling the functional parts connected thereto. The head section is supported at the upper front end of the pipe socket and can therefore transfer the forces, which arise in its region as a result of the handling, well to the pipe socket that follows, in which the foot section, which is in one piece therewith, is integrated. Because the internal thread of the pipe socket now precedes, the foot section can be embedded fully in the plastic material in the pipe wall. The foot section positively engages the plastic of the pipe socket. With this, the foot section fulfills the function of a reinforcing sleeve, which braces the pipe socket. This positiveness is promoted by radial openings in the foot section, which the plastic of the pipe socket infiltrates and therefore provides for an intimate connection between the two-membered metal insert and the pipe socket. A material composite exists, which can be highly stressed and withstands axial, radial or tangential forces, which act on the head section of the metal insert, when said insert is used in the intended manner.
This is particularly important, if the pipe clamp is constructed as a so called "T-piece pipe", which has a lateral pipe junction for branching off a house connection line, which can be connected thereto. The T-piece pipe is constructed of plastic in one piece with the upper clamp shell and has in its upper region the pipe socket. The special, inventive, two-membered metal insert is integrated in this T-piece pipe in the manner mentioned. Its head section protrudes out of the upper end of the T-piece pipe, while its foot section extends as reinforcing sleeve over the whole length of the T-piece pipe. Suitable radial openings are disposed above as well as below the pipe junction. The T-piece pipe is reinforced continuously. The plastic in the region of the T-piece pipe is
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Manibs Spezialarmaturen GmbH & Co. KG
Walton George L.
LandOfFree
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