US4444122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primary suspension system for a railway car
Assignee: Bombardier Corp
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Filing: 1981-08-27
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Granted: 1984-04-24
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Expires: 2001-08-27
Abstract
Abstract A primary suspension system is disposed between a journal bearing assembly carrying a wheel-axle assembly and a side frame of a railway truck. A rubber ring having cut-away portions or openings therein is bonded to inner and outer split metal rings. The inner ring is retained by the journal assembly and the outer ring is retained by the side frame.
Inventors
- 👤 William W. Dickhart, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:48
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/26; B61F5/30; B61F5/305; F; F16; F16F; F16F1/00; F16F1/36; F16F1/38; F16F1/387
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
170 words
In a railway truck having a side frame for receiving an axle disposed to ride on a journal bearing assembly, a primary suspension system disposed between said journal bearing assembly and said side frame comprising: (a) a first inner metal ring including two spaced segments; (b) a second outer metal ring including two spaced segments; p1 (c) an elastomeric ring comprising two segments, each of said segments being disposed between and bonded to one of said first and second metal ring segments to permit said elastomeric ring to withstand higher stresses in said primary suspension system and to minimize creep therein; (d) said elastomeric ring having a plurality of spaced cut-out portions therein and extending around said journal bearing assembly to provide a selected spring rate dependent on said cut-out portions; (e) said first inner metal ring being in engagement with said journal bearing assembly; and (f) said second outer ring being in engagement with said side frame, whereby relatively soft spring rates in vertical and longitudinal directions are provided.
Claim 2
Dependent Claim
170 words
In a railway truck having a side frame for receiving an axle disposed to ride on a journal bearing assembly, a primary suspension system disposed between said journal bearing assembly and said side frame comprising: (a) a first inner metal ring including two spaced segments; (b) a second outer metal ring including two spaced segments; p1 (c) an elastomeric ring comprising two segments, each of said segments being disposed between and bonded to one of said first and second metal ring segments to permit said elastomeric ring to withstand higher stresses in said primary suspension system and to minimize creep therein; (d) said elastomeric ring having a plurality of spaced cut-out portions therein and extending around said journal bearing assembly to provide a selected spring rate dependent on said cut-out portions; (e) said first inner metal ring being in engagement with said journal bearing assembly; and (f) said second outer ring being in engagement with said side frame, whereby relatively soft spring rates in vertical and longitudinal directions are provided.
Claim 3
Dependent Claim
29 words
A primary suspension system as set forth in claim 1 wherein each of said two segments of said inner and outer rings comprise approximately one-half the total ring circumference.
Claim 4
Dependent Claim
29 words
A primary suspension system as set forth in claim 2 wherein the inner surfaces of the two segments of said first inner ring are retained by said journal bearing.
Claim 5
Dependent Claim
30 words
A primary suspension system as set forth in claim 3 wherein the outer surfaces of the two segments of said second outer ring are retained laterally on said side frame.
Claim 6
Dependent Claim
34 words
A primary suspension system as set forth in claim 4 wherein said two segments of said second outer ring include outwardly extending lip portions along their outer edges to receive said side frame therebetween.
Claim 7
Dependent Claim
23 words
A primary suspension system as set forth in claim 5 wherein said cut-out portions in said elastomeric ring include lateral openings extending therethrough.
Claim 8
Dependent Claim
84 words
A primary suspension system as set forth in claim 6 wherein said lateral openings are disposed within the elastomer ring and shaped to provide different spring rates as the load on said primary suspension system increases, said different spring rates resulting from top portions of the elastomeric ring forming the opening contacting the bottom portions of the elastomeric ring while still maintaining open areas in the total areas of the openings until the compression forces applied to the elastomeric ring exceeds a predetermined level.
Claim 9
Dependent Claim
23 words
A primary suspension system as set forth in claim 5 wherein said cut-out portions in said elastomeric rings comprises radial openings extending therethrough.
Claim 10
Dependent Claim
38 words
A primary suspension system as set forth in claim 4 wherein said two segments of said second outer ring include inwardly extending lip portions along their outer edges to fit between inwardly projecting flanges on said side frame.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |