Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1996-06-19
1997-07-01
DePumpo, Daniel G.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277128, 277147, 277189, 24 20CW, F16J 1500, B65D 6302
Patent
active
056428910
ABSTRACT:
A radially expandable device for exerting an outward expansion of a seal to establish a pipe joint including a band having inner and outer ends wrapped to overlap. A pivot link hinged to the inner band end has serrations which engage locking serrations on the inside of the outer band end and swings out as the band inner end is forced out with a hydraulic jack to an expanded locked condition, in which the pivot link extends circumferentially. The radial expansion is accomplished with lower friction as the frictional resistance created by contact with seal is reduced, and simplified installation equipment may be used.
REFERENCES:
patent: 3958313 (1976-05-01), Rossborough
patent: 4191390 (1980-03-01), Wolf et al.
patent: 4215868 (1980-08-01), Skinner et al.
patent: 4478437 (1984-10-01), Skinner
patent: 4711455 (1987-12-01), Ditcher et al.
patent: 4903970 (1990-02-01), Ditcher et al.
patent: 5029907 (1991-07-01), Gundy
patent: 5054794 (1991-10-01), Westhoff et al.
patent: 5150927 (1992-09-01), Skinner
"Press-Boot" by: Press-Seal Gasket Corporation (no date available).
Benefiel John R.
DePumpo Daniel G.
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