Spring lock coupling

Pipe joints or couplings – Essential catch – Coil spring

Patent

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Details

285341, 285351, F16L 3902

Patent

active

050944940

ABSTRACT:
The present invention relates to a tubular coupling comprising a first tube having an end portion; a cage means disposed on the end portion and including a radial base portion through which the end portion projects, a first circular flange portion connected at one end thereof to the radial base portion and angularly inclined outwardly from the end portion, a curved wall portion connected to the first circular flange portion and partially forming an annular chamber, and a second circular flange portion connected to the curved wall portion and terminating in radially spaced relation to an outer surface of the end portion of the first tube. The coupling also includes a way of retaining the cage on the end portion of the first tube to hold the cage against axial displacement. A second tube having an end portion is telescopically mounted on the end portion of the first tube. The end portion of the second tube includes a ramp portion adjacent the terminal end of the second tube and is angularly disposed relative to the longitudinal axis of the second tube; and a further portion adjacent to the ramp portion which is inwardly angularly disposed toward the longitudinal axis of the second tube. The end portion of the second tube partially projects into the space between the surface of the end portion of the first tube and the cage. A spring is disposed within the cage interposed between the further portion of the second tube and the second circular flange portion, thereby preventing telescopic disengagement of the second tube from the first tube. Finally there is a seal disposed between the end portion of the first tube and the end portion of the second tube for preventing leakage between the respective end portions.

REFERENCES:
patent: 2914344 (1959-11-01), Anthes
patent: 2921801 (1960-01-01), Beyer
patent: 2939728 (1960-06-01), Bitel
patent: 3532101 (1970-10-01), Snyder
patent: 4055359 (1977-10-01), McWethy
patent: 4401326 (1983-08-01), Blair
patent: 4632434 (1986-12-01), Proctor et al.
patent: 4728130 (1988-03-01), Corzine
patent: 4750762 (1988-06-01), Corzine
patent: 4805943 (1989-02-01), Balsells
patent: 4872710 (1989-10-01), Konecny et al.

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