Face-type sealing ring with inner seal band

Claim 2

An axially and radially compact seal assembly for relatively rotatable members, comprising: a pair of small section metal seal rings having means defining axially disposed seal faces disposed at the innermost minimum diameter of each of said rings engaged in sealing contact; one of said seal faces having means defining a narrow seal band at the innermost minimum diameter thereof; first mounting means securing one of said rings to one of said members; second mounting means securing the other of said rings to the other of said members; one of said mounting means including loading means for applying a face load to said seal rings; and, said loading means including a pair of opposed convergent conical ramps and a resilient O-ring compressed between the ramps.

Claim 3

The seal assembly of claim 1 wherein one of said ramps is formed in one of said rings; and, the other of said ramps is formed on one of said relatively rotatable members.

Claim 4

The seal of claim 2 wherein one of said seal rings is of a flat annular construction having opposite radial faces.

Claim 5

The seal assembly of claim 2 wherein said ramp is formed on the inner diameter of said one seal member.

Claim 6

The seal assembly of claim 2 wherein said seal member having said ramp formed therein is shaped to define said seal band at the inner diameter thereof; and, the other of said seal rings is of a flat annular configuration having opposite radial faces.

Claim 7

The seal assembly of claim 4 wherein both of said seal rings are constructed of sheet metal; and, both of said rings are shaped to provide means defining a radially extending narrow sealing band at the inner diameter thereof.

Claim 8

The seal assembly of claim 1 wherein the mounting means for both of said rings include an annular resilient member.

Claim 9

The seal assembly of claim 2 wherein said seal assembly is constructed and mounted for exclusion of foreign matter at the inner diameter thereof.

Claim 10

The seal assembly of claim 8 wherein one of said relatively rotatable members is a stationary shaft having one of said conical ramps formed integrally therewith; and, the other of said relatively rotatable members is a track roller having a counterbore concentric with said shaft for mounting one of said seal rings.

Claim 11

An axially and radially compact seal assembly for a track roller having a stationary shaft with a conical ramp formed integrally thereon and a rotatable member mounted on the shaft, comprising: a first ring having a substantially axially inwardly facing seal surface formed at the minimum diameter of said ring; mounting means for sealingly securing said first ring to the rotatable member; a second ring having a substantially axially outwardly facing narrow band seal surface formed at the minimum diameter of said ring and a conical ramp formed internally thereof; and a resilient annular ring compressibly disposed intermediate said conical ramp of the shaft and said conical ramp of said second ring for axially biasing said outwardly facing seal surface of said second ring against said inwardly facing seal surface of said first ring.

Claim 12

An axially and radially compact seal assembly for a track roller having a stationary shaft with a conical ramp formed integrally thereon and a rotatable member mounted on the shaft, comprising: a first ring having a substantially axially inwardly facing seal surface formed at the minimum diameter of said ring; mounting means for sealingly securing said first ring to the rotatable member; a second ring having a substantially axially outwardly facing narrow band seal surface formed at the minimum diameter of said ring and a conical ramp formed internally thereof; and a resilient annular ring compressibly disposed intermediate said conical ramp of the shaft and said conical ramp of said second ring for axially biasing said outwardly facing seal surface of said second ring against said inwardly facing seal surface of said first ring.

Claim 13

The axially and radially compact seal assembly of claim 10 wherein said rotatable member includes an inwardly facing counterbore; and said mounting means for said first ring includes an annular resilient member disposed intermediate said counterbore and said first ring for sealingly seating it within said rotatable member.

Claim 14

The axially and radially compact seal assembly of claim 11 wherein said first and second rings are constructed of sheet metal; and said first and second rings are shaped to provide means for defining a radially extending narrow sealing band at the inner diameter thereof relatively closely adjacent said shaft so that the relative surface velocity therebetween is at a minimum.