Sealing ring structure
AssigneeFirma Busak & Luyken KG,
InventorRoy Edlund
Life of this patent
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Abstract
A Sealing Ring Structure useful for pistons and piston rods has a sealing section and a stressing section for pressing a contact surface of the sealing section into engagement with a moving surface to be sealed. The sealing and stressing sections may be separate rings or may be layers of different material in an integral multilayer laminate. The contact surface of the sealing section is of small axial length compared with the overall length of the structure and is located between a recess in the sealing section on the high pressure side of the structure and an inclined surface of the sealing section which defines a wedge-like gap between the structure and the moving surface to be sealed which gap diverges towards the low pressure end of the structure.
Claims11
A ring seal for effecting a fluid seal between a pair of members one of which is movable with respect to the other the improvement, comprising an annular sealing section and a concentric stressing section adapted to radially bias said sealing section, said sealing section having a contact surface adapted to slidably engage said movable member, said contact surface defined by a the intersection of cylindrical recess extending axially inwardly from one end thereof terminating in a radially extending edge and by a radially inwardly inclined conical recess extending axially inward from the opposite end thereof, said sealing section being arranged with respect to said movable parts so that said cylindrical recess faces the high pressure side of said seal and said conical recess faces the low pressure side of said seal.
Dependencies are inferred from the claim text.