Patent US3595572A successfully refreshed from Google Patents.
US3595572A
Expired / Lapsed
US
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Track pin and bushing joint seal
Assignee: Fiat Allis Europe SpA
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Filing: 1970-02-13
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Granted: 1971-07-27
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Expires: 1990-02-13
Abstract
Abstract A pin and bushing face-type seal for an endless track belt of the type used on crawler tractors designed with a figuration producing effective sealing over a relatively wide range of variations of axial spacing between the end of the bushing and the confronting track link sidebar.
Inventors
- 👤 Gerald L Granda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:25
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/088; B62D55/0887
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
An annular seal component for a face-type seal comprising: a hard, relatively inflexible annular seal ring portion having an annular sealing face at one axial end thereof and a resiliently flexible annular portion bonded to the other axial end of said ring portion and extending in one axial direction therefrom, said flexible annular portion having a convex surface formed by a revolving curve extending from the inner diameter of said ring portion axially in a substantially elliptical path to a point spaced radially outwardly and in said one axial direction from the outer diameter of said ring portion and a concave surface formed by revolving a curve extending in said one axial direction from said outer diameter of said ring portion and radially outwardly to said point.
Claim 2
Dependent Claim
127 words
An annular seal component for a face-type seal comprising: a hard, relatively inflexible annular seal ring portion having an annular sealing face at one axial end thereof and a resiliently flexible annular portion bonded to the other axial end of said ring portion and extending in one axial direction therefrom, said flexible annular portion having a convex surface formed by a revolving curve extending from the inner diameter of said ring portion axially in a substantially elliptical path to a point spaced radially outwardly and in said one axial direction from the outer diameter of said ring portion and a concave surface formed by revolving a curve extending in said one axial direction from said outer diameter of said ring portion and radially outwardly to said point.
Claim 3
Dependent Claim
17 words
The invention of claim 1 wherein said point is at the outer diameter of said annular portion.
Claim 4
Dependent Claim
21 words
The invention of claim 1 wherein said concave surface has an approximate right-angle relationship to said convex surface at said point.
Claim 5
Dependent Claim
27 words
The invention of claim 3 wherein a line tangent to said convex surface at said point is approximately normal to the plane defined by said sealing face.
Claim 6
Dependent Claim
35 words
The invention of claim 4 wherein the axial dimension of said flexible annular portion is greater than the radial dimension of a section thereof in a plane passing through the axis of said seal component.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |