Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1984-10-23
1986-04-08
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 88, 277 962, F16J 1534
Patent
active
045807892
ABSTRACT:
The shaft seal construction is employed in a bin level indicator between the housing and the rotatable shaft thereof. The housing has an enlarged bore therein concentric with the shaft. A composite pressure sealing ring is disposed in sealing relation between the shaft and the bore. Such ring has a rubber-like pressure sealing ring member facing forwardly and a metal backing ring member behind the rubber-like ring member and preferably bonded thereto. The rubber-like ring member has a peripheral surface in sealing engagement with the bore, and a forwardly projecting annular sealing lip in rotary sealing engagement with the shaft. The metal backing ring member has a peripheral surface compressibly engaging the bore with an interference fit therebetween. A rubber-like vacuum sealing ring is disposed behind the metal backing ring member and is provided with a first frusto-conical sealing lip, engaging the backing ring member, and a second annular sealing lip in sealing engagement with the shaft.
REFERENCES:
patent: 3914072 (1975-10-01), Rowley et al.
patent: 3988026 (1976-10-01), Kemp
patent: 4289320 (1981-09-01), Altnau
patent: 4427202 (1984-01-01), Backlin
patent: 4515377 (1985-05-01), Johnson
Ludlow Industries, Inc.
Smith Robert I.
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