Tubular rod for the treatment of the inside surface of a tube

Details Tubular rod for the treatment of the inside surface of a tube Tubular rod for the treatment of the inside surface of a tube

1988-05-13

1989-07-18

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204272, 204275, 204277, 204279, C17D 1700

Patent

active

048490849

ABSTRACT:
The rod incorporates a sealing device enabling a part of the inside surface of the tube, extending along its length, to be isolated from adjacent zones. The sealing device comprises two assemblies (5, 6) spaced along the length of the rod and each consisting of an annular piston (26, 36) slidably mounted on the body (2) of the rod, and at least one annular seal (32, 42) interposed between the piston and a radial support flange (33, 43). Compressed air supplied to the piston (26, 36) enables the seal (32, 42) to be compressed and to undergo radial expansion.

REFERENCES:
patent: 2859157 (1958-11-01), Curtiss, Jr.
patent: 2970950 (1961-02-01), Bahmann
patent: 3429787 (1969-02-01), Weinreich
patent: 3618639 (1971-11-01), Daley et al.
patent: 3673073 (1972-06-01), Tobey et al.
patent: 3974042 (1976-08-01), Angelini
patent: 4369101 (1983-01-01), Wolff et al.
patent: 4393805 (1983-07-01), Boer
patent: 4529008 (1985-07-01), Appleton
patent: 4624750 (1986-11-01), Malagola et al.

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