Packing seal for cast iron pipe joints

Details Packing seal for cast iron pipe joints Packing seal for cast iron pipe joints

1984-10-29

1985-10-15

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

F16J 1532, F16L 1700

Patent

active

045469873

ABSTRACT:
An annular elastomer packing 2 for a male-female bell housing type of pipe joint has a trapezoidal foot 12 radially opposite an anchor ridge or flange 8 which seats in a mating groove 5 in the housing, and a tapering truncated body portion 10 joined to the anchor ridge by a shoulder 6 and to the foot by a groove or recess 19. The radial compression of the foot during the initial insertion of the male pipe end serves to firmly anchor the packing via the ridge 8 and groove 5 with the recess 19 accommodating the compressively deformed material, whereafter the continued insertion of the male end radially compresses and axially extends the body portion to ensure a tight seal. This configuration reduces the insertion force and enables greater dimensional variations to be tolerated.

REFERENCES:
patent: 3081102 (1963-03-01), Murray et al.
patent: 3573871 (1971-04-01), Warner
patent: 3576329 (1971-04-01), Weaver
patent: 3857589 (1974-12-01), Oostenbrink

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