Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1980-10-22
1982-06-22
Ward, Jr., Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 92, 277 95, 277153, 277165, 277166, 277208, F16J 1532, F16J 1538
Patent
active
043358870
ABSTRACT:
A sealing device for a flexible dynamometric bar associated with a hydraulic power-lift of an agricultural tractor comprises an elastomer sealing ring formed in one piece by a collar element which surrounds the bar, and a bell-shaped element, which coaxially surrounds the collar element. The collar element is provided with a pair of internal circumferential sealing lips which, having diameters smaller than that of the bar, are deformed when fitted to the latter to ensure an effective seal. Sealing is also ensured by a pair of resilient metal rings which press the collar element against the bar. The elastomer of the sealing ring has an additive of graphite or laminar cleavage salts to reduce the friction which results from sliding between the bar and the lips, during deformation of the bar in use.
REFERENCES:
patent: 3022081 (1962-02-01), Kosatka
patent: 3086781 (1963-04-01), Hudson et al.
patent: 3601417 (1971-08-01), Szepesvary
patent: 3770284 (1973-11-01), Galloway
patent: 3980309 (1976-09-01), Dechavanne
patent: 4083567 (1978-04-01), Thumm
Fiat Trattori S.p.A.
Ward, Jr. Robert S.
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