Coupling hardware

Details Coupling hardware Coupling hardware

1995-10-31

1998-03-31

Arola, Dave W.

Pipe joints or couplings

Particular interface

Tapered

285382, F16L 2500

Patent

active

057329850

ABSTRACT:
A coupling in which work for fixing an inner pipe is facilitated, and in which airtightness is maintained such that oil leaks do not occur. A fixing member is fixed to a through-hole formed in an interior portion of an outer pipe. The inner pipe is supported by the fixing member. When a press-fit portion of the fixing member is press-fit into the through-hole, due to a taper surface, an axial center of the inner pipe is aligned with a center of the through-hole, and the press-fit portion fits tightly to an inner peripheral wall of the through-hole while plastically deforming the inner peripheral wall. A portion of the inner peripheral wall of the through-hole, which portion is plastically deformed by the press-fit portion, enters into an annular groove. A seat surface portion abuts and fits tightly to a surface at a peripheral edge of the through-hole. Due to the fixing member, the through-hole is in a completely airtight state.

REFERENCES:
patent: 3262721 (1966-07-01), Knight
patent: 3326006 (1967-06-01), Mount
patent: 4030850 (1977-06-01), Hyde
patent: 4049297 (1977-09-01), Reneau
patent: 4310184 (1982-01-01), Campbell
patent: 4685706 (1987-08-01), Kowal et al.
patent: 4799715 (1989-01-01), Goubeaux et al.
patent: 5088771 (1992-02-01), Hosseinian et al.
patent: 5452921 (1995-09-01), Hyatt et al.

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