Hydraulic seal

Claim 2

An annular hydraulic seal assembly of the type to be utilized between two relatively movable members, said assembly comprising: a base seal having a cross section with a planar bottom, a pair of spaced parallel planar sides extending upwardly from said bottom, a tapered wall extending outwardly and upwardly from the upper extremity of each of said sides, a groove in the top thereof, a seating surface extending upwardly and outwardly from each side of said groove to define with said tapered walls and a sealing lip on either side of said groove for engaging the relatively moving members, a pressure surface interconnecting each seating surface and the adjacent tapered wall, each of said pressure surfaces extending inwardly and upwardly from the adjacent tapered wall; and a loading seal having a projection extending downwardly therefrom for disposition in said groove of said base seal and having a cross section including a seating wall extending upwardly and outwardly from the upper extremity of each side of sAid projections projection for engaging said seating surfaces of said base seal to define a sealing lip on either side of said projection for engaging the relatively moving members.

Claim 3

An assembly as set forth in claim 1 wherein said base seal is of polyurethane.

Claim 4

An assembly as set forth in claim 2 wherein said loading seal is of an elastomer reinforced with a fabric.

Claim 5

An assembly as set forth in claim 2 wherein said loading seal is of an elastomer reinforced with a fabric.

Claim 6

An assembly as set forth in claim 4 wherein said polyurethane has durometer between 45 and 55 on the Shore D scale.

Claim 7

An assembly as set forth in claim 5 wherein said elastomer has a durometer between 70 and 90 on the Shore A scale.

Claim 8

An assembly as set forth in claim 1 wherein said cross section of said loading seal includes a lip wall extending upwardly and outwardly from the upper extremity of each of said seating walls, said lip walls respectively extending more upwardly than outwardly as compared to said seating walls.

Claim 9

An assembly as set forth in claim 7 wherein said base seal is made of an organic polymeric material which is harder than the material of which said loading seal is made.

Claim 10

An assembly as set forth in claim 8 wherein said base seal is of polyurethane.

Claim 11

An assembly as set forth in claim 8 wherein said loading seal has a generally V-shaped groove therein opposite to said projection, and including an additional member having a generally V-shaped bottom for disposition in said V-shaped groove of said loading seal.

Claim 12

An assembly as set forth in claim 10 wherein said additional member is a terminal member having a flat planar top.

Claim 13

An assembly as set forth in claim 10 wherein said additional member is an intermediate seal having a generally V-shaped groove in the top thereof for receiving another member having a V-shaped bottom.

Claim 14

An assembly as set forth in claim 12 including a plurality of said intermediate seals for coacting together by disposition of the V-shaped bottom of one into the V-shaped groove of another and said another member is a terminal member having a flat planar top.

Claim 15

An assembly as set forth in claim 13 wherein said intermediate seals and said terminal member each have a cross section including lip walls extending upwardly and outwardly from the upper extremities of the V-shaped bottoms thereof.

Claim 16

An assembly as set forth in claim 14 wherein the V-shaped groove and the lip walls of each intermediate seal intersect to define lip seals.

Claim 17

An annular hydraulic seal assembly of the type to be utilized between two relatively moving members, said assembly comprising: a base seal made of polyurethane; said base seal having a durometer between 45 and 55 on the Shore D scale; said base seal having a cross section including a planar bottom, a pair of spaced parallel planar sides extending upwardly from said bottom, a tapered wall extending outwardly and upwardly at the upper extremity of each of said sides, a substantially V-shaped groove disposed in the upper extremity thereof, a seating surface extending upwardly and outwardly at an angle of 30* relative to said bottom from each side of said V-shaped groove, said seating surfaces being disposed at an angle of 120* relative to one another, a pressure surface interconnecting each seating surface and the adjacent tapered wall and disposed at an angle of 45* relative to said bottom, said pressure surfaces being disposed at an angle of 270* relative to one another; a loading seal made of an elastomeric material reinforced with a fabric; said elastomeric material having a durometer between 70 and 90 on the Shore A scale; said loading seal having a cross section including a downwardly extending generally U-shaped projection for disposition in said groove of said base seal, a seating wall extending upwardly and outwardly from the upper extrEmity of each side of said U-shaped projection for engaging said seating surfaces of said base seal, a lip wall extending upwardly and outwardly from the upper extremity of each of said seating walls, said lip walls extending more upwardly than outwardly as compared to said seating walls, a generally V-shaped groove extending thereinto and interconnecting said lip walls, each of said lip walls intersect said V-shaped groove to define a sealing lip; at least one intermediate seal made of an elastomeric material reinforced with a fabric with the elastomeric material thereof having a durometer between 70 and 90 on the Shore A scale; said intermediate seal having a cross section including a V-shaped bottom for coacting with said V-shaped groove in said loading seal, a lip wall extending upwardly and outwardly from each side of said V-shaped bottom, said lip walls extending more upwardly than outwardly as compared to said V-shaped bottom, a generally V-shaped groove extending thereinto and interconnecting said lip walls thereof, each of said lip walls intersect said V-shaped groove to define a sealing lip; a terminal ring of elastomeric material reinforced by fabfi fabric with the elastomeric material thereof having a durometer of between 70 and 90 on the Shore A scale; said terminal ring having a cross section including a V-shaped bottom for coacting with said V-shaped groove of said intermediate seal, a lip wall extending upwardly and outwardly from each side of said V-shaped bottom, said lip walls extending more upwardly than outwardly as compared to said V-shaped bottom, a flat planar surface extending between said lip walls.

Claim 18

An annular hydraulic seal assembly of the type to be utilized between two relatively moving members, said assembly comprising: a base seal made of polyurethane; said base seal having a durometer between 45 and 55 on the Shore D scale; said base seal having a cross section including a planar bottom, a pair of spaced parallel planar sides extending upwardly from said bottom, a tapered wall extending outwardly and upwardly at the upper extremity of each of said sides, a substantially V-shaped groove disposed in the upper extremity thereof, a seating surface extending upwardly and outwardly at an angle of 30* relative to said bottom from each side of said V-shaped groove, said seating surfaces being disposed at an angle of 120* relative to one another, a pressure surface interconnecting each seating surface and the adjacent tapered wall and disposed at an angle of 45* relative to said bottom, said pressure surfaces being disposed at an angle of 270* relative to one another; a loading seal made of an elastomeric material reinforced with a fabric; said elastomeric material having a durometer between 70 and 90 on the Shore A scale; said loading seal having a cross section including a downwardly extending generally U-shaped projection for disposition in said groove of said base seal, a seating wall extending upwardly and outwardly from the upper extrEmity of each side of said U-shaped projection for engaging said seating surfaces of said base seal, a lip wall extending upwardly and outwardly from the upper extremity of each of said seating walls, said lip walls extending more upwardly than outwardly as compared to said seating walls, a generally V-shaped groove extending thereinto and interconnecting said lip walls, each of said lip walls intersect said V-shaped groove to define a sealing lip; at least one intermediate seal made of an elastomeric material reinforced with a fabric with the elastomeric material thereof having a durometer between 70 and 90 on the Shore A scale; said intermediate seal having a cross section including a V-shaped bottom for coacting with said V-shaped groove in said loading seal, a lip wall extending upwardly and outwardly from each side of said V-shaped bottom, said lip walls extending more upwardly than outwardly as compared to said V-shaped bottom, a generally V-shaped groove extending thereinto and interconnecting said lip walls thereof, each of said lip walls intersect said V-shaped groove to define a sealing lip; a terminal ring of elastomeric material reinforced by fabfi fabric with the elastomeric material thereof having a durometer of between 70 and 90 on the Shore A scale; said terminal ring having a cross section including a V-shaped bottom for coacting with said V-shaped groove of said intermediate seal, a lip wall extending upwardly and outwardly from each side of said V-shaped bottom, said lip walls extending more upwardly than outwardly as compared to said V-shaped bottom, a flat planar surface extending between said lip walls.