Packoff seal with dual member engaging means

Details Packoff seal with dual member engaging means Packoff seal with dual member engaging means

1989-02-21

1990-05-01

Shoap, Allan N.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

2771164, 285 3, F16J 1518

Patent

active

049212591

ABSTRACT:
An improved annular seal including a resilient seal ring, a first follower, a second follower being threadedly connected to the first follower, threads on the first follower for setting movement of the followers, a shear pin for releasably securing the second follower to the first follower, the first follower having a lower rim for engaging the resilient seal ring, the second follower having a lower extension for exerting a loading force on the resilient seal ring, the area of engagement of the first follower with the seal ring being substantially larger than the area of the second seal ring exerting the seal ring loading force. In one form the second follower includes a lower rim extending around the exterior of the first follower into engagement with the seal ring. In a modified form the first follower includes a plurality of openings through its lower rim and the second follower includes a plurality of pins extending through the openings to exert a force on the seal ring.

REFERENCES:
patent: 2921633 (1960-01-01), Baker
patent: 2988148 (1961-06-01), Conrad et al.
patent: 3004776 (1961-10-01), Sebardt
patent: 3972546 (1976-08-01), Patch
patent: 4008898 (1977-02-01), Weldon
patent: 4138144 (1979-02-01), Pierce, Jr.
patent: 4407530 (1983-10-01), Fowler
patent: 4408783 (1983-10-01), Gruller
patent: 4416472 (1983-11-01), Fowler
patent: 4500117 (1985-02-01), Ayers et al.
patent: 4754812 (1988-07-01), Gentry
patent: 4836579 (1989-06-01), Wester et al.

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