Patent US4237792A successfully refreshed from Google Patents.
US4237792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced liner for center plate structure of a railway vehicle
Assignee: Dayco Products LLC
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Filing: 1978-09-28
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Granted: 1980-12-09
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Expires: 1998-09-28
Abstract
Abstract A wear-resistant reinforced liner for a center plate structure of a railway vehicle is provided wherein the liner is defined of a polymeric matrix and has top and bottom surfaces adapted to engage railway members, the liner having dual-purpose means embedded in the matrix. This dual-purpose means provides reinforcement for the liner and is partially exposed at the top and bottom surfaces to form a comparatively low electrical resistance path through the liner with each surface portion in contact with the mating members of the vehicle.
Inventors
- 👤 M. John Somers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:31
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/16; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; F16C33/28; F16C2326/00; F16C2326/10; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
193 words
In a railway vehicle having; a body provided with a body bolster and a body center plate; a truck provided with a truck bolster and a bolster bowl defined by a truck center plate having an unstanding peripheral flange; said body center plate being received within said flange and being supported by said truck center plate; a wear-resistant liner disposed between said center plates; said liner being defined by polymeric material and having a top surface which engages said truck center plate; and a liner reinforcement embedded in said polymeric material which serves as a matrix therefor, the improvement wherein said reinforcement is constructed to serve the additional purpose of electrically conductive means and define dual-purpose means having a top surface portion which comprises said top surface and a bottom surface portion which comprises said top surface and a bottom surface portion which comprises said bottom surface, said dual-purpose means providing reinforcement for said liner and a comparatively low electrical resistance path through said liner with each surface portion in contact with an associated center plate, said top and bottom surface portions each comprising a small fractional part of its associated planar surface.
Claim 2
Dependent Claim
193 words
In a railway vehicle having; a body provided with a body bolster and a body center plate; a truck provided with a truck bolster and a bolster bowl defined by a truck center plate having an unstanding peripheral flange; said body center plate being received within said flange and being supported by said truck center plate; a wear-resistant liner disposed between said center plates; said liner being defined by polymeric material and having a top surface which engages said truck center plate; and a liner reinforcement embedded in said polymeric material which serves as a matrix therefor, the improvement wherein said reinforcement is constructed to serve the additional purpose of electrically conductive means and define dual-purpose means having a top surface portion which comprises said top surface and a bottom surface portion which comprises said top surface and a bottom surface portion which comprises said bottom surface, said dual-purpose means providing reinforcement for said liner and a comparatively low electrical resistance path through said liner with each surface portion in contact with an associated center plate, said top and bottom surface portions each comprising a small fractional part of its associated planar surface.
Claim 3
Dependent Claim
39 words
In a railway vehicle as set forth in claim 1 the further improvement wherein said top and bottom surfaces of said liner are planar surfaces having the respective top and bottom surface portions of said reinforcing means coplanar therewith.
Claim 4
Dependent Claim
40 words
In a railway vehicle as set forth in claim 1 the further improvement in which said dual-purpose means comprises a grid-like structure having a roughly sinusoidal configuration when viewed from an end thereof prior to embedment in said polymeric material.
Claim 5
Dependent Claim
31 words
In a railway vehicle as set forth in claim 3 the further improvement in which said grid-like structure comprises an expanded metal structure having openings therein of roughly diamond shaped outline.
Claim 6
Dependent Claim
44 words
In a railway vehicle as set forth in claim 1 the further improvement in which said dual-purpose means comprises at least one electrically conductive ring which extends in an undulating path and has upper and lower apexes defining said top and bottom surface portions.
Claim 7
Dependent Claim
23 words
In a railway vehicle as set forth in claim 1 the further improvement in which said polymeric material comprises a synthetic plastic material.
Claim 8
Dependent Claim
59 words
In a railway vehicle as set forth in claim 1 in which said center plates and bolsters have cooperating vertically aligned openings and a center pin is provided for extending through said openings the further improvement in which said liner has a central opening for receiving said center pin therethrough and said dual-purpose means extends immediately adjacent said opening.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |