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US 6,782,688 B2Granted
Chain with seals having improved characteristics
AssigneeRegina S.I.C.C. S.p.A.
InventorsCarlo Garbagnati, Massimiliano Fumagalli
Life of this patent
Estimating the term…
Abstract
A chain has links made up of pairs of outer and inner plates connected respectively by pins and bushes fitted on the pins and projecting through the inner plates. Between the bush and its pin there is a lubricated interface and on each end of the bush is mounted and compressed between an inner and an outer plate an annular seal. The seal when not compressed between the plates is generically shaped with a lip projecting towards the axis of the seal. With the chain assembled the lip tends to wedge between the bush and the outer plate to reduce the wear on the seal.
Claims9
Chain comprising
- links made up of pairs of outer and inner plates connected respectively by pins and bushes fitted on the pins and protruding through the inner plates, a lubricated interface located between the pin and the bush fitted on the pin, an annular seal mounted on each end of the bushes and compressed between an inner and an outer plate to physically contain lubricant in said lubricated interface, with the seal, when not compressed between the plates being shaped with a lip projecting towards an axis of the seal and said lip, when the chain is assembled, being elastically thrust to sealingly wedge in an interstice between the bush and the outer plate in such a manner as to reduce wear of the seal.
Dependencies are inferred from the claim text.