Pipe joints or couplings – Convertible
Patent
1989-12-12
1991-03-26
Arola, Dave W.
Pipe joints or couplings
Convertible
285 45, 285 23, 285318, 285423, 285351, F16L 2500
Patent
active
050023144
ABSTRACT:
An improved locking assembly is disclosed for securing the connection between a push-on fitting having a flared end which is fitted into a cage and surrounded by a garter-type coil spring housed within the cage. The locking assembly includes a generally cylindrical coupling having a knurled outer surface and a single radial slit therein. The coupling includes at least two hinges integrally formed in the outer circumference thereof wherein at least three independent bearing surfaces are formed when the coupling encircles the connection. A multi-step circumferential recess within the coupling is utilized to accommodate variations in the external dimensions of the cage and a circular clamp or single screw are utilized to urge the single radial slit into a mated relationship such that relative axial movement of the cage and push-on fitting is restricted by radial pressure exerted by the coupling. In one embodiment of the present invention, multiple sized connections are accommodated by inserting within the coupling a cylindrical insert having a single radial slit and at least two hinges formed therein which correspond to the single radial slit and at least two hinges within the coupling, so that smaller connections may be accommodated.
REFERENCES:
patent: 1040039 (1912-10-01), Shapro
patent: 3527478 (1970-09-01), Enssle
patent: 4429907 (1984-02-01), Timmons
patent: 4468057 (1984-08-01), De Crombrugghe
patent: 4498691 (1985-02-01), Cooke
patent: 4568115 (1986-02-01), Zimmerly
patent: 4601495 (1986-07-01), Webb
patent: 4652023 (1987-03-01), Timmons
patent: 4728130 (1988-03-01), Corzine
patent: 4750762 (1986-06-01), Corzine
patent: 4795197 (1989-01-01), Kaminski et al.
Arola Dave W.
Dillon Andrew J.
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