Apparatus for sealing pipe

Details Apparatus for sealing pipe Apparatus for sealing pipe

1988-05-11

1989-11-28

Bryant, III, James E.

Pipes and tubular conduits

With closures and plugs

Inflation stem type

F16L 5512

Patent

active

048830941

ABSTRACT:
The pipe sealing pad has a cylindrical sleeve (20) which is made of reinforced rubber material and two end walls (30) which are also made of rubber material. They are joined together in one single vulcanization procedure involving heat and define an air-tight inner compartment (34) which can be accessed via an air connection (32) in the form of a pipe fitting (42). Internally, the connection (32) merges into a ring-disk (46) which is connected to the pipe fitting (42) only in the region of its inner area (48). This ring-disk is not connected to either the pipe fitting (42) or the end wall (30) in a ring-shaped concentric compensation zone (50) which adjoins. It is connected on an outer area (52) with an inner surface (54) of the end wall (30).

REFERENCES:
patent: 827835 (1906-08-01), White
patent: 1644096 (1927-10-01), Voit
patent: 2678666 (1954-05-01), Theis et al.
patent: 3459230 (1969-08-01), Smith
patent: 4079755 (1978-03-01), Lans
patent: 4083384 (1978-04-01), Horne et al.
patent: 4377184 (1983-03-01), Vetter
patent: 4526207 (1985-07-01), Burkley et al.

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