Pipe joints or couplings – Packed – With cooperating opposed packing grooves
Patent
1990-10-26
1992-06-02
Arola, Dave W.
Pipe joints or couplings
Packed
With cooperating opposed packing grooves
285354, 285351, 285917, 285918, F16L 1900
Patent
active
051181410
ABSTRACT:
A union joint capable of perfectly hermetically connecting pipes so that a gas passing the pipes never leaks from the junction of the pipes even if the pressure of the gas is as high as 150 kg/cm.sup.2. The union joint comprises a first sleeve hermetically joined to a pipe, a second sleeve hermetically joined to another pipe to be connected to the pipe joined to the first sleeve, one or a plurality of metallic gaskets placed between the respective sealing surfaces of the first and second sleeves so as to be compressed between the sealing surfaces of the first and second sleeves when the first and second sleeves are drawn axially toward each other, a coupling nut for drawing the first and second sleeves axially toward each other, and a thrust bearing interposed between the first sleeve and the coupling nut to allow the coupling nut to be rotated relative to the first sleeve. One of a plurality of annular grooves are formed at least in either the sealing surface of the first sleeve or the sealing surface of the second sleeve to receive the corresponding metallic gaskets. When compressed between the sealing surfaces, the metallic gasket is deformed in an elliptic cross section so that the metallic gasket and the bottom surface of the corresponding annular groove are in close contact with each other in a large contact area.
REFERENCES:
patent: 2705651 (1950-11-01), Myers
patent: 2878041 (1959-03-01), Hobbs
patent: 4114907 (1978-09-01), Abbes et al.
patent: 4603892 (1986-08-01), Abbes et al.
patent: 4606564 (1986-08-01), Kurachi
patent: 4640530 (1987-02-01), Abbes et al.
patent: 4811976 (1989-03-01), Yagisawa
Aberle Timothy
Arola Dave W.
Sanko Kogyo Kabushiki Kaisha
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