Pipe joints or couplings – Socket – Lugged pipe – rotary engagement
Patent
1976-08-20
1978-04-04
Machado, Reinaldo P.
Pipe joints or couplings
Socket
Lugged pipe, rotary engagement
285423, 285DIG4, 285260, F16L 2100
Patent
active
040823270
ABSTRACT:
A connecting joint construction particularly suited for use on large diameter corrugated plastic pipe or tubing. The joint is comprised of a first main length of corrugated, generally cylindrical plastic pipe having one end portion provided with corrugations which, considered from the interior of the pipe, are somewhat smaller in height than the corrugations of the main body portion of the pipe. One of the smaller corrugations has at least one locking area therein defined between a stop member and a locking member and the smaller corrugations further include a plurality of sets of axially aligned grooves formed therein. A second main length of pipe is provided with a smooth walled end portion of a diameter less than the minimum internal diameter of the one end portion of the first pipe. Cleat members extend outwardly from the smooth diameter end portion and are sized so that they can be slid longitudinally into the grooves in the first pipe and rotated into a corrugation with one of the cleat members lockingly received in the locking area to thereby lock the two pipe sections together. Preferably, the second length smooth walled end portion has two sets or circumferential rows of cleat members which engage adjacent ones of the smaller corrugations in the first length one end portion when the two pipe lengths are connected to each other. With this construction, the two lengths may be bent at sharp angles to each other at the joint area without adversely affecting the integrity of the joint.
REFERENCES:
patent: 1033187 (1912-07-01), Metzger
patent: 2444888 (1948-07-01), Baumgardner
patent: 3929359 (1975-12-01), Schmunk
Ott Denis P.
Sting Donald W.
Hancor, Inc.
Machado Reinaldo P.
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