Pipe joints or couplings – With assembly means or feature – Thread-cutting means
Patent
1991-10-02
1993-08-31
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
Thread-cutting means
285197, F16L 3500
Patent
active
052402908
ABSTRACT:
The branch pipe adapter assembly comprises an elongated member defining an insertion part, a body part and a connecting part with an aperture axially formed therethrough to permit fluid communication through the insertion part, the body and the connecting part. The insertion part further includes a terminal end and defines a tapered and externally threaded cylinder with the taper beginning at the terminal end of the insertion part and gradually increasing therefrom. A thread forming means forms threads in the wall of a branch hole formed in a main pipe, and is positioned at the tapered and externally threaded cylinder. A fitting member is used with an aperture formed therethrough to permit the insertion part to be received therethrough and with the front end being concave in order to matingly receive a portion of the convex external surface of the main pipe. A sealing means seals the fitting member against the convex external surface of the main pipe and seals the fitting member against the body of the elongated member upon aligning the aperture of the fitting member with the branch hole and inserting the terminal end of the insertion part through the aperture of the fitting member into the branch hole such that the tapered and externally threaded cylinder of the insertion part contact the wall of the branch hole and upon rotating the tapered and externally threaded cylinder of the insertion part gradually moves the terminal end of the insertion part further into the main pipe enabling the thread forming means to cutably engage the wall of the branch hole to form internal threads in the wall and to sealably engage the sealing means whereupon the adapter assembly is threadably secured in the branch hole and is sealed against unintended leakage while enabling fluid communication with the fluid in the main pipe through the aperture formed in the elongated member.
REFERENCES:
patent: 3349792 (1967-10-01), Larkin
patent: 3606398 (1971-09-01), Bocceda
patent: 3863960 (1975-02-01), Andersson
patent: 3870064 (1975-03-01), Vigneron
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