Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1985-01-07
1987-06-09
Shoap, Allan N.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
137225, 138 93, 220239, 277 9, 277 34, 376203, 411 19, 411 34, 411371, B65D 5300, F16J 1546, G21C 1306
Patent
active
046715185
ABSTRACT:
An expandable inflatable circular plug for sealing one of the blind bore holes which are located in a reactor vessel body flange of a nuclear reactor and which are used to fasten the reactor vessel head to the reactor vessel body by means of bolts passing through corresponding bores in a mating flange on the reactor vessel head. The plug comprises: a cylindrical member of an elastomer material disposed substantially symmetrically between first and second circular metal plates and sealingly fastened thereto so as to define a radially expandable pressure chamber within the cylindrical member; an axial bore extending from the outer surface of the first plate and opening into the annular pressure chamber; a normally closed valve disposed in the axial bore for sealing the axial bore when in its closed position and for permitting air to enter or leave the chamber via the axial bore when in its open position; and an arrangement disposed adjacent the outer surface of the first plate member for releaseably coupling the plug to a tool which is used to insert the plug into a hole to be sealed and to open the valve to supply pressurized air to the chamber to inflate and expand same. A tool and a method of inserting and removing the plug using the tool are also disclosed.
REFERENCES:
patent: 1683336 (1928-09-01), Cummings
patent: 2843154 (1958-07-01), Hoskins
patent: 3130583 (1964-04-01), Greue et al.
patent: 3606070 (1971-09-01), Shepherd
patent: 3794204 (1974-02-01), Wehmeyer
patent: 3870085 (1975-03-01), Schneider
Abeles Daniel C.
Shoap Allan N.
Westinghouse Electric Corp.
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