Pipe joints or couplings – Convertible
Patent
1978-08-25
1980-02-19
Callaghan, Thomas F.
Pipe joints or couplings
Convertible
285 94, 285 96, 285236, 285367, F16L 2300
Patent
active
041891724
ABSTRACT:
A pipe coupling which includes a continuous ring-shaped gasket that can be fitted around the abutting ends of two pipes and a clamp that can be fitted around the gasket and around flanges of the pipes. The clamp includes a grease fitting, while the gasket has a pair of upstanding flanges or ridges near its axially opposite ends, to form a grease reservoir that can hold grease under pressure. The grease applies pressure that helps seal the gasket against the pipe ends. The grease leaks out especially when the pipe carries pressure pulses, to lubricate the coupling so as to facilitate the turning of one pipe relative to the other with minimal wearing of the gasket. The gasket has a pair of inwardly-directed flanges that can rest upon the pipe flanges at the ends of the pipes and that are of greater height than the outer gasket flanges. The gasket can be easily turned inside-out, so that the thick flanges form a grease reservoir to enable more grease to be held in heavy duty and repeated rotation applications.
REFERENCES:
patent: 1867891 (1932-07-01), Reynolds
patent: 1925335 (1933-09-01), Murphy
patent: 2028182 (1936-01-01), Barnickol, Jr.
patent: 3228714 (1966-01-01), Dricken
patent: 3558164 (1971-01-01), Havell
patent: 3582112 (1971-06-01), Pico
patent: 3682503 (1972-08-01), Bloom
patent: 3828403 (1974-08-01), Perrin et al.
patent: 4026584 (1977-05-01), Lowe
patent: 4081599 (1978-03-01), Cookson
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