Patent US3720175A successfully refreshed from Google Patents.
US3720175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resiliently mounted railway vehicle truck
Assignee: ThyssenKrupp Budd Co
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Filing: 1970-12-28
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Granted: 1973-03-13
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Expires: 1990-12-28
Abstract
Abstract This application discloses a railway vehicle truck having axle connections with the side frame members which provides adequate springing to isolate the unsprung wheel-axle units from the truck frame, together with auxiliary tie structure to prevent separation of frame side members independently of the axle connections; also means assisting the supporting air springs to improve the connection between the truck frame and vehicle body.
Inventors
- 👤 French H Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:47
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/38; B61F5/26; B61F5/30; B61F5/305; B61F5/32
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
79 words
A railway vehicle truck, comprising in combination, longitudinally spaced wheel-axle units, side frame members having bearing support at each end on a wheel-axle unit, elastomeric spring support units each comprising a plurality of uniformly circumferentially spaced elastomer pads surrounding the axle, said pads being disposed and secured on diameters of said axle which are at right angles to each other and secured on, and said pad being shiftable circumferentially to achieve a change in springing rate of the truck.
Claim 2
Dependent Claim
79 words
A railway vehicle truck, comprising in combination, longitudinally spaced wheel-axle units, side frame members having bearing support at each end on a wheel-axle unit, elastomeric spring support units each comprising a plurality of uniformly circumferentially spaced elastomer pads surrounding the axle, said pads being disposed and secured on diameters of said axle which are at right angles to each other and secured on, and said pad being shiftable circumferentially to achieve a change in springing rate of the truck.
Claim 3
Dependent Claim
79 words
A railway vehicle truck, comprising in combination, longitudinally spaced wheel-axle units, side frame members having bearing support at each end on a wheel-axle unit, elastomeric spring support units each comprising a plurality of uniformly circumferentially spaced elastomer pads surrounding the axle, said pads being disposed and secured on diameters of said axle which are at right angles to each other and secured on, and said pad being shiftable circumferentially to achieve a change in springing rate of the truck.
Claim 4
Dependent Claim
79 words
A railway vehicle truck, comprising in combination, longitudinally spaced wheel-axle units, side frame members having bearing support at each end on a wheel-axle unit, elastomeric spring support units each comprising a plurality of uniformly circumferentially spaced elastomer pads surrounding the axle, said pads being disposed and secured on diameters of said axle which are at right angles to each other and secured on, and said pad being shiftable circumferentially to achieve a change in springing rate of the truck.
Claim 5
Dependent Claim
25 words
A railway vehicle truck as set forth in claim 1, wherein each elastomer pad has a plate bonded to its radially inner and outer surfaces.
Claim 6
Dependent Claim
23 words
A railway vehicle truck as set forth in claim 2, wherein each pad is supported by locating retaining means on an interior ring.
Claim 7
Dependent Claim
24 words
A railway vehicle truck as set forth in claim 3, wherein all of said pads are retained on said ring by circumferential band means.
Claim 8
Dependent Claim
35 words
A railway vehicle truck as set forth in claim 4, wherein said banded assembly of pads is clamped under pressure in a housing of the truck frame to relieve clamping tension in said band means.
Claim 9
Dependent Claim
25 words
A railway vehicle truck as set forth in claim 1, wherein tie bar means are connected between said side frame members in the axle region.
Claim 10
Dependent Claim
36 words
A railway vehicle truck as set forth in claim 6, wherein said tie bar means have universal end connections to provide weave between said side frame members while maintaining them at substantially a fixed distance apart.
Claim 11
Dependent Claim
34 words
A railway vehicle truck as set forth in claim 6, wherein inwardly extending brake mechanism supporting projections are provided on said side frame members, said tie bar means being connected between said supporting projections.
Claim 12
Dependent Claim
44 words
A railway vehicle truck as set forth in claim 6, wherein said side frame members are provided with spider projections loosely embracing a vertical journal for truck turning movement, said tie bar means assisting in retaining said spider projections biased toward said vertical journal.
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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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |