Sealing assembly

Claim 2

A sealing assembly comprising a resilient circular sealing ring having a cross section including at least one axially extending leg and a radially extending leg intersecting said axially extending leg, a transition portion interconnecting said legs and defining a faired corner area therebetween to permit flow therebetween of material upon deformation of said sealing ring, and at least one nonextrusion ring adapted to the be received in the corner area and extending radially, parallel to said radially extending leg, said nonextrusion ring having a shaped portion complemental with said corner area and said axially extending leg and adapted to mate therewith so that the flow of material between said radially and axially extending legs upon deformation of said sealing ring biases said nonextrusion ring radially outwardly, and said radially extending leg having an end portion thereof remote from said axially extending leg recessed from said nonextrusion ring when said sealing ring is undeformed.

Claim 3

A sealing assembly in accordance with claim 1 wherein said transition portion of said sealing ring is a continuous radius extending inwardly from said radially extending leg to said axially extending leg, said nonextrusion ring is radiused outwardly to form a radius complemental with the radius of the sealing ring.

Claim 4

A sealing assembly in accordance with claim 1 wherein said transition portion of said sealing ring comprises a flat oblique surface intersecting respective radially and axially extending surfaces of said radially extending and axially extending legs at obtuse angles, and said nonextrusion ring is complementally shaped at said shaped portion.

Claim 5

A sealing assembly in accordance with claim 1 wherein said axially and radially extending legs define a generally T-shaped cross section for said sealing ring with the radially extending and axially extending legs interconnected by transition portions, said transition portions being continuous radii extending inwardly from said radial leg to an axial leg, each of said transition portions being adapted to receive a nonextrusion ring having a portion thereof radiused outwardly to form a radius complemental with the radius of one of the transition portions, said end of said radially extending leg being recessed from each of said nonextrusion rings.

Claim 6

A sealing assembly in accordance with claim 1 wherein said axially and radially extending legs define a generally T-shaped cross section for said sealing ring with the radially extending and axially extending legs interconnected by transition portions, said transition portions comprising flat oblique surfaces interconnecting respective radially and axially extending surfaces of said radially extending and axially extending legs at obtuse angles, each of said transition portions adapted to receive a nonextrusion ring having a portion complemental therewith, said end of said radially extending leg being recessed from each of said nonextrusion rings.

Claim 7

Apparatus comprising elements operatively associated in relative axially displaceable relationship, one of said elements being provided with a radially extending groove opening toward the other of said elements, a sealing assembly in said groove, said sealing assembly comprising a resilient sealing ring having a cross section including at least one axially extending leg and a radially extending leg intersecting said axially extending leg, a transition portion interconnecting said leg and defining a faired corner area therebetween to permit flow of material upon deformation of said sealing ring, at least one nonextrusion ring received in the corner area of said sealing ring and extending parallel to said radially extending leg in contact with one wall of said groove, said nonextrusion ring having a shaped portion complemental with said corner area and said axially extending leg and adapted to mate therewith so that the flow of material between said radially and axially extending legs upon deformation of said sealing ring biases said nonextrusion ring radially outwardly, said radially extending leg having and end portion thereof extending at all times into sealing contact with the other opposite element, said end portion being recessed from said nonextrusion ring when said sealing ring is undeforMed.

Claim 8

Apparatus comprising elements operatively associated in relative axially displaceable relationship, one of said elements being provided with a radially extending groove opening toward the other of said elements, a sealing assembly in said groove, said sealing assembly comprising a resilient sealing ring having a cross section including at least one axially extending leg and a radially extending leg intersecting said axially extending leg, a transition portion interconnecting said leg and defining a faired corner area therebetween to permit flow of material upon deformation of said sealing ring, at least one nonextrusion ring received in the corner area of said sealing ring and extending parallel to said radially extending leg in contact with one wall of said groove, said nonextrusion ring having a shaped portion complemental with said corner area and said axially extending leg and adapted to mate therewith so that the flow of material between said radially and axially extending legs upon deformation of said sealing ring biases said nonextrusion ring radially outwardly, said radially extending leg having and end portion thereof extending at all times into sealing contact with the other opposite element, said end portion being recessed from said nonextrusion ring when said sealing ring is undeforMed.

Claim 9

Apparatus in accordance with claim 6, wherein said axially and radially extending legs define a generally T-shaped cross section for said sealing ring with the radially extending and axially extending legs interconnected by transition portions, said transition portions being continuous radii extending inwardly from said radial leg to an axial leg, each of said transition portions receiving a nonextrusion ring having a portion thereof radiused outwardly to form radii complemental with the radii of the transition portions, said end portion of said radially extending leg being recessed from both of said nonextrusion rings when said sealing rings is undeformed.

Claim 10

Apparatus in accordance with claim 6 wherein said axially and radially extending legs define a generally T-shaped cross section for said sealing ring with the radially and axially extending legs interconnected by transition portions, said transition portions comprising flat oblique surfaces interconnecting respective radially and axially extending surfaces of said radially and axially extending legs at obtuse angles, each of said transition portions receiving a nonextrusion ring having a portion thereof complemental therewith, and said end portion of said radially extending leg being recessed from both of said nonextrusion rings when said sealing ring is deformed.