Pipe joints or couplings – Having plural independent paths – Parallel paths
Patent
1998-05-08
1999-11-09
Arola, Dave W.
Pipe joints or couplings
Having plural independent paths
Parallel paths
285363, 285906, F16L 3900
Patent
active
059799447
ABSTRACT:
Lower members each have a bolt bore comprising a large-diameter portion larger than the head of a bolt in diameter, and a small diameter portion extending downward from the large-diameter portion with a stepped portion formed therebetween and having a diameter intermediate between the diameter of the bolt head and the diameter of the shank of the bolt. The small-diameter portion of the bolt bore has fitted therein a hollow cylindrical spacer with an inside diameter larger than the diameter of the bolt shank. The spacer has a lower end supported by a support member and an upper end positioned in the large-diameter portion. A hollow cylindrical elastic member is interposed between the bolt head and the stepped portion for biasing the lower member toward the support member.
REFERENCES:
patent: 5255647 (1993-10-01), Kiczek
Itoi Shigeru
Kojima Tetsuya
Shonohara Tsutomu
Yamaji Michio
Yokoyama Kosuke
Arola Dave W.
Fujikin Incorporated
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