Patent US4454821A successfully refreshed from Google Patents.
US4454821A
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Radial articulated truck
Assignee: Bombardier Corp
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Filing: 1981-11-02
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Granted: 1984-06-19
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Expires: 2001-11-02
Abstract
Abstract An articulated truck joins and supports two adjacent railway cars. A linkage including two pairs of links is connected between the bolster of the truck and one of the railway cars. A common link is connected between the two pairs of link. The linkage and common link forces the truck to maintain a radial position with respect to curves in the track.
Inventors
- 👤 William W. Dickhart, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:04
CPC Classifications
B; B61; B61G; B61G3/00; B61G3/10; B61G3/12; B61F; B61F5/00; B61F5/38; B61F5/44; B61D; B61D3/00; B61D3/10; B61D3/12; B61D3/16; B61D3/18; B61D3/182; B61D3/184; B61F3/00; B61F3/12; B61F3/125; B61G5/00; B61G5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
In combination with a truck for connecting and supporting a pair of linked rail cars and having a bolster connected to a pair of side frames with wheel axle assemblies on said side frames, a forced steering system for maintaining said truck substantially radial with respect to a curved track during operation comprising: (a) connecting means secured to said bolster; (b) means for pivotally connecting the ends of said rail cars to said connecting means; (c) a mechanical linkage including a plurality of bars connected between one of said rail cars and said bolster to force said truck to maintain a radial position with said curved track; (d) said plurality of bars comprise two pairs of bars connected between the opposite ends of said bolster to laterally spaced connections of said one of said rail cars, and a connecting bar connecting said two pairs of bars; and (e) said two pairs of bars forcing the opposite ends of said bolster to be moved in opposite directions relative to the end of said one car when said truck is passing over a curved track.
Claim 2
Dependent Claim
183 words
In combination with a truck for connecting and supporting a pair of linked rail cars and having a bolster connected to a pair of side frames with wheel axle assemblies on said side frames, a forced steering system for maintaining said truck substantially radial with respect to a curved track during operation comprising: (a) connecting means secured to said bolster; (b) means for pivotally connecting the ends of said rail cars to said connecting means; (c) a mechanical linkage including a plurality of bars connected between one of said rail cars and said bolster to force said truck to maintain a radial position with said curved track; (d) said plurality of bars comprise two pairs of bars connected between the opposite ends of said bolster to laterally spaced connections of said one of said rail cars, and a connecting bar connecting said two pairs of bars; and (e) said two pairs of bars forcing the opposite ends of said bolster to be moved in opposite directions relative to the end of said one car when said truck is passing over a curved track.
References Cited (Backward Citations)
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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) | 1987-06-19 | 1987-12-19 | 1988-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-19 | 1991-12-19 | 1992-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-19 | 1995-12-19 | 1996-06-19 | $7700.00 | Window Closed / Lapsed |