Patent US3944298A successfully refreshed from Google Patents.
US3944298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Truck bolster center bowl wear plate
Assignee: Westinghouse Air Brake Co
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Filing: 1975-02-24
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Granted: 1976-03-16
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Expires: 1995-02-24
Abstract
Abstract This invention relates to a replaceable plastic wear member which is disposed within the center bowl of a railway vehicle truck bolster and interposed between the bottom of the center bowl and a vehicle body bolster center plate that extends from the bottom of the body into the center bowl in abutting relation with the upper side of the wear member, the purpose of which member is to prevent wear of the bottom of the center bowl by the relative movement between the car body and the truck bolster.
Inventors
- 👤 John G. Cannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:26
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/16; F; F16; F16C; F16C17/00; F16C17/10; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C2326/00; F16C2326/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
176 words
In a vehicle, the combination comprising: a. a truck bolster having therein a center bowl provided with an annular wall and a flat bottom from the center of which extends a boss, b. a center plate vertical ring wear liner so disposed in said center bowl and fixedly secured to the annular wall thereof that the outer end of said center bowl and one end of said ring wear member lie in a common plane, c. a vehicle body having a bolster of such a diameter as to extend through said ring wear member for disposition in said center bowl, and wherein the improvement comprises: d. an annular wear member formed of a low friction, semi-flexible, high-load-carrying ability, plastic material, and having an outside diameter the same as the inside diameter of said ring wear liner to enable the insertion thereof through said ring wear liner into surrounding relation with said boss of said center bowl for interposition between said flat bottom of said center bowl and said body bolster to support thereon said body bolster.
Claim 2
Dependent Claim
176 words
In a vehicle, the combination comprising: a. a truck bolster having therein a center bowl provided with an annular wall and a flat bottom from the center of which extends a boss, b. a center plate vertical ring wear liner so disposed in said center bowl and fixedly secured to the annular wall thereof that the outer end of said center bowl and one end of said ring wear member lie in a common plane, c. a vehicle body having a bolster of such a diameter as to extend through said ring wear member for disposition in said center bowl, and wherein the improvement comprises: d. an annular wear member formed of a low friction, semi-flexible, high-load-carrying ability, plastic material, and having an outside diameter the same as the inside diameter of said ring wear liner to enable the insertion thereof through said ring wear liner into surrounding relation with said boss of said center bowl for interposition between said flat bottom of said center bowl and said body bolster to support thereon said body bolster.
Claim 3
Dependent Claim
116 words
In a vehicle, the combination comprising: a. a truck bolster having therein a center bowl provided with an annular wall and a flat bottom from the center of which extends a boss, b. a vehicle body having a bolster for disposition in said center bowl, and, wherein the improvement comprises: c. an annular wear member formed of a low friction, semi-flexible, high-load-carrying ability, plastic material and being provided with an annular bevel extending inward a chosen distance from the outer periphery of said wear member, said wear member being disposed in said center bowl in surrounding relation to said boss and interposed between said body bolster and said truck bolster for supporting thereon said body bolster.
Claim 4
Dependent Claim
116 words
In a vehicle, the combination comprising: a. a truck bolster having therein a center bowl provided with an annular wall and a flat bottom from the center of which extends a boss, b. a vehicle body having a bolster for disposition in said center bowl, and, wherein the improvement comprises: c. an annular wear member formed of a low friction, semi-flexible, high-load-carrying ability, plastic material and being provided with an annular bevel extending inward a chosen distance from the outer periphery of said wear member, said wear member being disposed in said center bowl in surrounding relation to said boss and interposed between said body bolster and said truck bolster for supporting thereon said body bolster.
Claim 5
Dependent Claim
63 words
In a vehicle, the combination recited in claim 1, further characterized in that said annular wear member is provided with an annular bevel extending inward a chosen distance from the outer periphery thereof to enable limited rocking movement of said vehicle body bolster relative to said truck bolster without said vehicle body bolster inflicting damage to the periphery of said annular wear member.
Claim 6
Dependent Claim
25 words
In a vehicle, the combination recited in claim 1, further characterized in that said annular wear member is formed from a molecularly oriented polyolefin material.
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) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |