Pipe coupling for lap joints

Details Pipe coupling for lap joints Pipe coupling for lap joints

1978-12-11

1981-04-14

Callaghan, Thomas F.

Pipe joints or couplings

Elbow

29157R, 72392, 285419, 285420, F16L 2100

Patent

active

042616000

ABSTRACT:
A coupling for a pipe lap joint is disclosed in which a sleeve has a larger diameter at one end and a smaller diameter at the other end with means for stretching the sleeve around the pipes. The sleeve has a radially projecting channel-shaped sector and force applying means engages the sector to stretch the sleeve around the pipes. The channel-shape sector is uniform in cross section along the length of the sleeve and the larger end of the sleeve is axially offset from the smaller end. An improved method for making the pipe coupling is disclosed in which a sleeve blank is disposed in an external die and stretched outwardly by an expanding mandrel.

REFERENCES:
patent: 1306982 (1919-06-01), Walsh
patent: 1910411 (1933-05-01), Shera
patent: 2360054 (1944-10-01), Haas
patent: 3060994 (1962-10-01), Larsen et al.
patent: 3944265 (1976-03-01), Hiemstra et al.
patent: 4049298 (1977-09-01), Foti
patent: 4056273 (1977-11-01), Cassel
patent: 4165109 (1979-08-01), Foti

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