Pipe joints or couplings – With assembly means or feature – Particular tool-engaging means or with tool
Patent
1995-05-04
1996-04-16
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
Particular tool-engaging means or with tool
285 55, 285 93, 2853323, 2853344, 285354, 285917, 277236, F16L 3500
Patent
active
055075312
ABSTRACT:
A cylinder valve outlet includes a bore with a large cylindrical entry leading to a tapered seat. A nipple with a cylindrical neck is fit into the large diameter entry of the bore of the valve outlet. The nipple further includes an arcuately convex mating end for seating in the conically tapered seat of the valve outlet. A seal enhancer is between the valve outlet and the nipple. The seal enhancer is generally tubular with opposed leading and trailing ends and a cylindrical section therebetween. The leading end is tapered for engagement between the tapered seat of the valve outlet and the mating end of the nipple. The trailing end of the seal enhancer is flared outwardly. The seal enhancer is shorter than the mating portions of the nipple so that the outwardly flared trailing end is visually readily apparent. The outwardly flared trailing end also facilitates separation of the seal enhancer from either the nipple or the valve outlet when the gas cylinder is being replaced.
REFERENCES:
patent: 954549 (1910-04-01), Turner
patent: 1426724 (1922-08-01), Fyffe
patent: 3139294 (1964-06-01), Richards
patent: 3275348 (1966-09-01), Scott
patent: 4113284 (1978-09-01), Blocker
patent: 4555129 (1985-11-01), Daulin
patent: 4648632 (1987-03-01), Hagner
patent: 5280967 (1994-01-01), Varrin
patent: 5393108 (1995-02-01), Kerr
Arola Dave W.
Casella Anthony J.
Ewal Manufacturing Company, Inc.
Hespos Gerald E.
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