US3638579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible rail-highway shunting locomotive
Assignee: Aresco Trak Chief Pty Ltd
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Filing: 1969-11-12
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Granted: 1972-02-01
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Expires: 1989-11-12
Abstract
Abstract A shunting vehicle for positioning trucks on a railway line wherein the coupling is rotatable, not about a central pin as an axis but by movement guided by angled slots to thereby throw the center of rotation forwardly and avoid displacement of the shunting vehicle wheels from the rails.
Inventors
- 👤 William James Yard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:51
CPC Classifications
B; B60; B60F; B60F1/00; B60F1/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
196 words
A shunting vehicle having a chassis supported on railengaging rubber-tired wheels, retractable arms on the chassis, flanged rail-engaging wheels carried by the retractable arms and engaging the rails thereby retaining said rubber-tired wheels on the rails, said chassis having a front end and a rear end, and a coupling subchassis on the chassis at its rear end, and comprising the improvement of a flat horizontal member on the chassis movably supporting a complementary flat horizontal member on the subchassis, a pair of slots in one of the members, a corresponding pair of pins in the other member passing through the slots, and bearing plates pivotally supported by the pins and slidably engaging the edges defining the slots, the slots being positioned symmetrically with respect to the longitudinal centerline which extends between the front and rear ends of said member which contains them and diverging away from each other in the direction of the front of the chassis so that when rotation of the subchassis with respect to the chassis takes place under operating conditions, said bearing plates slide within said slots and the effective center of rotation of the subchassis is transferred forwardly of the slots.
Claim 2
Dependent Claim
196 words
A shunting vehicle having a chassis supported on railengaging rubber-tired wheels, retractable arms on the chassis, flanged rail-engaging wheels carried by the retractable arms and engaging the rails thereby retaining said rubber-tired wheels on the rails, said chassis having a front end and a rear end, and a coupling subchassis on the chassis at its rear end, and comprising the improvement of a flat horizontal member on the chassis movably supporting a complementary flat horizontal member on the subchassis, a pair of slots in one of the members, a corresponding pair of pins in the other member passing through the slots, and bearing plates pivotally supported by the pins and slidably engaging the edges defining the slots, the slots being positioned symmetrically with respect to the longitudinal centerline which extends between the front and rear ends of said member which contains them and diverging away from each other in the direction of the front of the chassis so that when rotation of the subchassis with respect to the chassis takes place under operating conditions, said bearing plates slide within said slots and the effective center of rotation of the subchassis is transferred forwardly of the slots.
Claim 3
Dependent Claim
57 words
A shunting vehicle according to claim 1, further comprising a coupling on the coupling subchassis, the coupling being supported by an upper pair of arms and a lower pair of arms, pivot means between respective rear ends of the arms and the coupling, and further pivot means between respective front ends of the arms and the subchassis.
Claim 4
Dependent Claim
34 words
A shunting vehicle according to claim 2, further comprising a lifting ram arranged to lift the coupling relative to the subchassis, the lifting ram extending between the Upper pair of arms and the subchassis.
Claim 5
Dependent Claim
66 words
A shunting vehicle according to claim 1, wherein the pins are welded to the flat horizontal member on the chassis and extend upwardly through the slots, said slots being in the flat horizontal member on the subchassis, the bearing plates are carried between upper and lower retention discs on the pins, and nuts on the pins retain the retention discs and bearing plates in respective assemblies.
Claim 6
Dependent Claim
37 words
A shunting vehicle according to claim 2 wherein said pivot means between the coupling and the two pairs of arms include a substantially horizontal slot to permit relative pitching between the towed vehicle and the shunting vehicle.
References Cited (Backward Citations)
US3380397A
Cited
US3420191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |