Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1993-04-14
1995-10-31
Cuchlinski, Jr., William A.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277171, F16J 1510
Patent
active
054622891
ABSTRACT:
A hygienic sealing arrangement for a leadthrough shaft passing through a cover (4) for use in the food industry or the like in which an outer seal ring (1) and an inner seal ring (2) are bonded to the cover (4) by vulcanization. Upon assembly, the side of the outer seal ring (1) facing the medium to be sealed off is somewhat compressed because its contact surfaces (6, 7) in the cover (4) and the adjoining wall (5), respectively, converge toward the medium side. The inner seal ring is in the form of a lip seal (2) and bears against a part (3) of the lead-through shaft which part (3) can move somewhat back and forth but which does not rotate. The side face of the lip seal (2) is exposed to the medium being sealed off of arcuate curvature to form a recess so that the edge of the lip is pressed against the abutting surface by the pressure (P) of the product in the recess.
REFERENCES:
patent: 2642016 (1953-06-01), Thalmann
patent: 2912264 (1959-11-01), Peck
patent: 3354786 (1967-11-01), Bedford
patent: 3440122 (1969-04-01), McCormick
patent: 4648740 (1987-03-01), Carlson
patent: 5029878 (1991-07-01), Ray
Beres John L.
Cuchlinski Jr. William A.
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