US3712240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear electric motor propulsion system
Assignee: Transportation Technology Inc
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Filing: 1971-02-23
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Granted: 1973-01-23
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Expires: 1991-02-23
Abstract
Abstract A linear motor propulsion system for vehicles adapted to travel along a fixed roadway comprising primary and secondary motor elements, one of which is carried by the vehicle and the other of which is disposed in a discontinuous fashion along the roadway. A constant thrust profile is achieved by arranging the length and spacing of the elements such that a constant area of projected surface coextension exists between the elements irrespective of the vehicle position along the roadway.
Inventors
- 👤 R Donlon
- 👤 W Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:20
CPC Classifications
B; B60; B60L; B60L13/00; B60L13/03; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
145 words
In a vehicular propulsion system: a vehicle adapted for travel over a roadway, a linear motor for propelling the vehicle and including field producing and field reactive elements, one of said elements being carried by the vehicle and the other of said elements being disposed in discontinuous portions along the roadway, said elements being maintained in adjacent but spaced relation to produce a thrust on said vehicle in proportion to the projected area coextension of said elements, the length of said one element and the spacing between said other discontinuous element portions being such that the area of projected surface coextension between said elements and the thrust on said vehiclE is constant irrespective of the position of the vehicle longitudinally along to the roadway as said vehicle travels over a length of roadway which is great as compared to the length of said one element.
Claim 2
Dependent Claim
145 words
In a vehicular propulsion system: a vehicle adapted for travel over a roadway, a linear motor for propelling the vehicle and including field producing and field reactive elements, one of said elements being carried by the vehicle and the other of said elements being disposed in discontinuous portions along the roadway, said elements being maintained in adjacent but spaced relation to produce a thrust on said vehicle in proportion to the projected area coextension of said elements, the length of said one element and the spacing between said other discontinuous element portions being such that the area of projected surface coextension between said elements and the thrust on said vehiclE is constant irrespective of the position of the vehicle longitudinally along to the roadway as said vehicle travels over a length of roadway which is great as compared to the length of said one element.
Claim 3
Dependent Claim
27 words
A system as defined in claim 1 wherein the length of said one element is equal to the distance between the longitudinal centers of discontinuous element portions.
Claim 4
Dependent Claim
18 words
A system as defined in claim 2 wherein the discontinuous element portions are of equal length and spacing.
Claim 5
Dependent Claim
21 words
A system as defined in claim 3 wherein the field reactive element is disposed in said discontinuous portions along the roadway.
Claim 6
Dependent Claim
33 words
A system as defined in claim 4 including a power source disposed substantially continuously along the roadway and means carried by the vehicle for variably interconnecting the source to the field producing element.
Claim 7
Dependent Claim
24 words
A system as defined in claim 4 including air support means on the vehicle for substantially frictionlessly supporting the vehicle relative to the roadway.
Claim 8
Dependent Claim
17 words
A system as defined in claim 2 wherein the field reactive element is disposed on the vehicle.
Claim 9
Dependent Claim
22 words
A system as defined in claim 7 including air support means on the vehicle for supporting the vehicle relative to the roadway.
References Cited (Backward Citations)
US2640955A
Cited
US3233559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |