Fluid handling – With repair – tapping – assembly – or disassembly means – Tapping a pipe – keg – or apertured tank under pressure
Patent
1981-07-15
1984-03-06
Walton, George L.
Fluid handling
With repair, tapping, assembly, or disassembly means
Tapping a pipe, keg, or apertured tank under pressure
72 71, 83 54, 222 80, 408 54, F16K 4300
Patent
active
044348096
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a pipe coupling for connecting branch pipes to a feed-pipe without requiring flow interruption in the feed-pipe.
PRIOR ART
Pipe couplings of this type are known in a great number of different embodiments, as described, for example, in British Pat. No. 1,034,138, French Patent No. 122 557 and U.S. Pat. No. 3,983,897, where, for connection between the feed-pipe, and the branch pipe a passageway is formed in the pipe coupling. The present invention comprises more precisely, as known previously, coupling parts, which sealingly embrace the feed-pipe, a cylindrical guide passageway extending through one coupling part, a fluid-tight piston in the guide passageway, which piston at its inner end is provided with a knife-shaped cutting-up member and is formed with a passageway for fluid connection between the feed-pipe and the branch pipe which is connected to the coupling part, in such a manner, that in assembled position of the coupling parts a portion of the feed-pipe projects in a radial direction into and intersects the guide passageway.
In the pipe coupling of U.S. Pat. No. 3,983,897, the said projecting portion of the pipe shell is cut off by translation of a valve body in a guide passageway. The said movement is effected, for example, by a detonation cartridge which is detonated by a hammer stroke on a firing pin. This pipe coupling thereby not only has the disadvantage of being complicated, but it also involves a certain risk in connection with the handling of detonation cartridges. The known construction, further, implies certain sealing problems.
SUMMARY OF THE INVENTION
With a pipe coupling according to the present invention it is possible by a simple structural design to provide the feed-pipe in a simple and efficient way with one or more holes for fluid connection to the passageway in the coupling part. The flow area of the holes can be made at least as great as the feed-pipe area. It is further possible that the portion, which was cut-up from the feed-pipe when making of the hole is retained attached to the feed-pipe and is folded up in the guide passageway of the coupling part, so that said cut-up portion contributes to an efficient locking between the pipe coupling and the feed-pipe. The pipe coupling according to the invention has the further essential advantage, that complete sealing between the feed-pipe and the branch pipe is obtained when the piston is in the position in which the connection between said pipes is to be shut off.
The characterizing features of the invention for achieving the aforesaid advantages become apparent from the attached claims.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is described in greater detail in the following by way of a preferred embodiment and with reference to the accompanying drawings, in which
FIG. 1 is a plan view of a preferred embodiment of a pipe coupling according to the invention connected to a feed-pipe where, for better clarity a piston forming one part of the pipe coupling is removed from the cylinder part,
FIG. 2 is a section along the line II--II in FIG. 1, and also with the piston separated from the cylinder part,
FIG. 3 is a section along the line III--III in FIG. 1,
FIG. 4 is a section corresponding to that shown in FIG. 2, but with the piston in place in the pipe coupling,
FIG. 5 is a plan view similar to FIG. 1 of a second embodiment of a pipe coupling according to the invention,
FIG. 6 is a section along the line VI--VI in FIG. 5, where the piston of the pipe coupling is separated from the cylinder part, and
FIG. 7 is a section similar to FIG. 4, where the piston is in place in the pipe coupling.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
As appears from the embodiment shown in FIGS. 1-4, the pipe coupling comprises coupling parts 2a and 2b, which are sealed about a feed-pipe 1 and by means of, for example, screws 3 are interconnected and embrace said feed-pipe. The coupling further comprises a piston 4 inserted in one coupling part. The seal between the coupling pa
REFERENCES:
patent: 2565692 (1951-08-01), Koerbacher et al.
patent: 2736335 (1956-02-01), Webber
patent: 3162211 (1964-12-01), Barusch
patent: 3394727 (1968-07-01), Wagner
patent: 3554217 (1971-01-01), Ehrens et al.
patent: 3844149 (1974-10-01), Hansen
patent: 3983897 (1976-10-01), Gebelius
patent: 4034777 (1977-07-01), Gebelius
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