Seal ring and method of manufacture
AssigneeParker-Hannifin Corporation
InventorsKenneth R. Albertson, Ralph E. Peterson
Life of this patent
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Abstract
A sealing ring having a U-shaped shell member and an actuator member formed in situ from liquid elastomer. The shell member has a base portion with two legs extending from the base to form a cavity therebetween which is filled with the liquid elastomer and cured in situ. This integrally formed U-shaped composite ring seal yields a highly reliable seal with minimal dimensional variation problems and is easy and economical to manufacture.
Claims9
A U-shaped annular packing member comprising a shell portion and an actuator portion;
- said shell being an integral one piece member of a deformable incompressible material, said shell having in transverse cross section, a base and two legs extending from said base, said legs terminating at a free end and defining a cavity therebetween;
- said cavity being substantially filled with liquid elastomer and cured in situ to form said actuator portion thereby providing the packing member with closely controllable dimensions while providing good sealing properties.
A method of making a U-shaped ring seal comprising the steps of forming a U-shaped shell having in transverse cross section a base, two legs extending from the base and a cavity between the legs;
- filling the cavity with a liquid material which forms a substantially incompressible elastomer material when cured;
- curing said material and moving a cutting means along a predetermined path to remove a portion of said legs and said material thereby providing for sealing lips of the seal.
Dependencies are inferred from the claim text.