Pipe joints or couplings – Nonmetal to metal – Internal member
Patent
1996-11-13
1998-07-07
Arola, Dave W.
Pipe joints or couplings
Nonmetal to metal
Internal member
285258, 285328, 285906, F16L 3320
Patent
active
057757402
ABSTRACT:
A joint structure for jointing a small-diameter thin metal tube and a pressure rubber hose, comprising: a joint portion having a joint end portion of a metal tube, which is given a double wall by fitting a short inner tube therein, and having a plurality of annular comb-tooth faces formed at least in the metal tube at the double wall in the vicinity of the joint end portion; and a bottomed cylindrical socket member having its bottom wall portion retained on the side of the metal tube and caulking and fixing the overlapping portions of the metal tube and the pressure rubber being fitted on the joint portion. A joint process for jointing a small-diameter thin metal tube and a pressure rubber hose, comprising: the step of fitting or press-fitting a short inner tube in a metal tube in the vicinity of a joint end portion thereby to form a double wall; the step of plastic-working the vicinity of the joint end portion over the double wall radially inward from the outside to form a plurality of annular comb-tooth faces at least at the side of the metal tube thereby to form a joint portion; the step of retaining the bottom wall portion of a bottomed cylindrical socket member fitted on the pressure rubber hose at the joint portion, at the portion at the back of the comb-tooth faces; and the step of caulking and fixing the overlapping portions.
REFERENCES:
patent: 4124232 (1978-11-01), Ahlstone
patent: 4212487 (1980-07-01), Jones et al.
patent: 5207460 (1993-05-01), Oetika
patent: 5387016 (1995-02-01), Joseph et al.
Aoki Tsuyoshi
Fukaya Kazumi
Arola Dave W.
Budzyn Ludomir A.
Casella Anthony J.
Hespos Gerald E.
Usui Kokusai Sangyo Kaisha Limited
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