US3682102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dampened railway truck
Assignee: British Railways Board
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Filing: 1969-05-09
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Granted: 1972-08-08
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Expires: 1989-05-09
Abstract
Abstract A four-wheeled two axle railway vehicle has its body mounted on each wheel-set through a suspension arrangement comprising multistage vertical springing means, a swing-link lateral suspension, a resilient yaw suspension comprising traction rods extending longitudinally of the vehicle between their connections with the wheel-set and body and incorporation rubber springs, and dampers disposed to provide viscous damping for vertical, lateral and roll motions.
Inventors
- 👤 Arthur Ronald Pocklington
- 👤 Geoffrey Richard Mahy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:49
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/26; B61F5/30; B61F5/32
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
155 words
In a suspension arrangement for a railway vehicle of the four-wheeled two axle type wherein the vehicle body is supported on a pair of wheel-sets through the suspension arrangement, the improvement comprising: vertical springing means coupling the body to each wheel-set and having at least two springs, said vertical springing means providing a low spring rate when the payload is below a predetermined value and a high spring rate when the payload is above the predetermined value, transverse suspension means coupling the body to each wheel-set and providing a low stiffness in the lateral direction which stiffness increases substantially in proportion With increase in payload, traction rods extending longitudinally of the vehicle between the vehicle body and each wheel-set and having resilience to provide a predetermined stiffness to horizontal yawing movements of the wheel-sets, and damper means disposed between the vehicle body and the wheel-sets to provide viscous damping for vertical, lateral and roll motions.
Claim 2
Dependent Claim
155 words
In a suspension arrangement for a railway vehicle of the four-wheeled two axle type wherein the vehicle body is supported on a pair of wheel-sets through the suspension arrangement, the improvement comprising: vertical springing means coupling the body to each wheel-set and having at least two springs, said vertical springing means providing a low spring rate when the payload is below a predetermined value and a high spring rate when the payload is above the predetermined value, transverse suspension means coupling the body to each wheel-set and providing a low stiffness in the lateral direction which stiffness increases substantially in proportion With increase in payload, traction rods extending longitudinally of the vehicle between the vehicle body and each wheel-set and having resilience to provide a predetermined stiffness to horizontal yawing movements of the wheel-sets, and damper means disposed between the vehicle body and the wheel-sets to provide viscous damping for vertical, lateral and roll motions.
Claim 3
Dependent Claim
34 words
The improvement of claim 1 wherein the vertical springing means comprises nests of coil springs, each nest comprising inner and outer concentric coil springs arranged such that one is inactive between no-load and part-load.
Claim 4
Dependent Claim
17 words
The improvement of claim 1 wherein the vertical springing means is provided in part by cantilever springs.
Claim 5
Dependent Claim
54 words
The improvement of claim 3 wherein said vertical springing means comprises said cantilever springs and coil springs in combination, which coil springs are arranged to be inactive between a predetermined part-load and full load by reason of abutting parts on the body and wheel-set respectively forming solid connections in parallel with said coil springs.
Claim 6
Dependent Claim
26 words
The improvement of claim 1 wherein said lateral suspension means comprises vertically extending swing links having knife edge mountings at both their lower and upper ends.
Claim 7
Dependent Claim
18 words
The improvement of claim 5 wherein the mountings at one end of said swing links incorporate resilient pads.
Claim 8
Dependent Claim
37 words
The improvement of claim 5 wherein the knife edge mounting at one end of each swing link has a rounded knife edge to permit rocking movement of the swing link in the longitudinal direction of the vehicle.
Claim 9
Dependent Claim
114 words
The improvement of claim 1 wherein said vertical springing means comprises coil springs and said lateral suspension means comprises swing links which extend axially through said coil springs, a knife edge mounting at the upper end of each said swing link being supported on the wheel-set through a rubber pad and a knife edge mounting at the lower end of said swing link supporting the lower end of the coil springs, which at their upper end abut against the vehicle body, the knife edge mountings at the upper ends of the swing links permitting by the rounding of the knife edges rocking movement of the swing links in the longitudinal direction of the vehicle.
Claim 10
Dependent Claim
75 words
The improvement of claim 1 wherein said vertical springing comprises a plurality of cantilever springs and said lateral suspension means comprises swing links, each cantilever spring being secured at one end to a respective wheel-set and supporting a swing link at its other end through a knife edge mounting, the swing link having a knife edge mounting at its lower end supporting the vehicle body through a resilient pad and a coil spring in series.
Claim 11
Dependent Claim
88 words
The improvement of claim 1 wherein a pair of said traction rods are connected with each wheel-set, said traction rods extending longitudinally of the vehicle between their connections with the wheel-set and vehicle body and being disposed symmetrically about the longitudinal center line of the vehicle, one said connection of each traction rod being through a rubber spring providing low conical stiffness and relatively high stiffness axially of the traction rod and the other said connection being a spherical connection permitting universal movement at the other said connection.
Claim 12
Dependent Claim
31 words
The improvement of claim 10 wherein said spherical connection incorporates a spherical rubber bushing of low conical stiffness and relatively high radial stiffness bonded to adjoining spherical parts of said connection.
Claim 13
Dependent Claim
34 words
The improvement of claim 1 wherein the damper means comprise telescoping hydraulic dampers, each of which is mounted in a vertical transverse plane of the vehicle and inclined to the vertical and horizontal directions.
Claim 14
Dependent Claim
33 words
A railway vehicle as claimed in claim 9 wherein said knife edge mounting at one end of said swing link comprises a pair of knife edge arrangements at right angles to each other.
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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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |