Fastener for closing and sealing ends of pipes subjected to inte

Details Fastener for closing and sealing ends of pipes subjected to inte Fastener for closing and sealing ends of pipes subjected to inte

1988-05-24

1990-03-20

Bryant, III, James E.

Pipes and tubular conduits

With closures and plugs

Test plugs

138 89, 73 491, 73 498, G01M 328

Patent

active

049092804

ABSTRACT:
A fastener for closing and sealing pipe ends subjected to internal pressure is applicable for testing plastic pipe for internal pressure resistance. Testing is carried out in apparatuses in which a pipe section is filled with water and then pressure is applied, its value corresponding with desired tension in the pipe wall. In the fastener of the invention forces exerting clamping pressure of fastener elements on pipe ends are derived from internal pressure within the pipe, allowing for disengagement of external supply during hours of testing on the one hand, and on the other hand ensuing proper proportion between this pressure and the forces clamping the fastener elements on pipe end.

REFERENCES:
patent: 3434337 (1969-03-01), Goeke
patent: 3886977 (1975-06-01), Dorgebray
patent: 3963054 (1976-06-01), Martin
patent: 4077250 (1978-03-01), Wesch
patent: 4197733 (1980-04-01), Holland
patent: 4766934 (1988-08-01), Ollivaud et al.

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