SYSTEM, METHOD AND APPARATUS FOR SPRING-ENERGIZED DYNAMIC SEALING ASSEMBLY
First Claim
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1. A system for linear motion, comprising:
- a housing having a bore with an axis and a recess located in the bore;
a rod located in the bore for axial motion relative thereto, the rod having an outer surface;
a seal assembly located in the recess of the bore for sealing between the housing and the rod, the seal assembly comprising;
a polymer ring;
an elastomer body joined to the polymer ring; and
a spring joined to the elastomer body for biasing portions of the elastomer body into contact with both the housing and the rod for providing a dynamic seal therebetween.
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Abstract
A seal assembly is disclosed. The seal comprises a metal spring bonded to an elastomer body that is coupled to a polymer ring. The spring may comprise a cantilevered, overlapped metal strip. The elastomer and polymer mechanically interlock with radial members. The elastomer has contacting surfaces configured in outward extending radii to enhance forward edge loading and oil removal from the dynamic surface. In hydraulic service, the seal prevents the egress of hydraulic fluid and ingress of foreign particles.
60 Citations
25 Claims
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1. A system for linear motion, comprising:
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a housing having a bore with an axis and a recess located in the bore; a rod located in the bore for axial motion relative thereto, the rod having an outer surface; a seal assembly located in the recess of the bore for sealing between the housing and the rod, the seal assembly comprising; a polymer ring; an elastomer body joined to the polymer ring; and a spring joined to the elastomer body for biasing portions of the elastomer body into contact with both the housing and the rod for providing a dynamic seal therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A seal assembly, comprising:
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a polymer ring; an elastomer body joined to the polymer ring via engaging members, the elastomer body having portions comprising extended surfaces with concave radii; and a spring joined to the elastomer body for biasing the portions of the elastomer body in opposite directions for providing a dynamic seal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A seal assembly, comprising:
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a polymer ring having an axis and an L-shaped sectional profile comprising a tubular portion and a flange on one axial end, a radial outer surface, and a radial taper opposite the flange that reduces both an inner diameter and an outer diameter of the polymer ring at an opposite axial end; an elastomer body joined to the polymer ring via a radial member in a radial groove, the elastomer body having portions comprising radially extending surfaces with concave radii; and a spring joined to the elastomer body for biasing the portions of the elastomer body in opposite directions and into inner and outer radial contact for providing a dynamic seal. - View Dependent Claims (22, 23, 24, 25)
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Specification