US3877387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traction car
Assignee: Hitachi Ltd
•
Filing: 1972-11-07
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Granted: 1975-04-15
•
Expires: 1992-11-07
Abstract
Abstract In an electric traction car comprising in combination adhesion drive means which drives the car through wheels driven by electric motors and electromagnetic drive or brake means which drives or brakes the car not through the wheels, such as linear motors or eddy-current brake means, said electromagnetic drive or brake means is mounted on the car frame through an axle provided independently of that for the adhesion drive means and the wheels, whereby an increase and concentration of the unsprung weight are avoided.
Inventors
- 👤 Syoji Kasai
- 👤 Yoshimitsu Onoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:13
CPC Classifications
B; B60; B60L; B60L13/00; B60L13/03; B60L13/035; B61; B61C; B61C9/00; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
140 words
An electric car of a type comprising a car body, at least one truck provided with at least one first axle and wheel combination for supporting said car body, and adhesion drive means for driving the car through said at least one first axle and wheel combination from electric motors mounted on said truck, and an electromagnetic means for providing at least one of driving and braking forces to the car by electro-magnetic forces generated in said electromagnetic means, characterized in that said electromagnetic means is mounted with at least one further axle and wheel combination mounted on a second truck, said second truck being provided space and separated from said at least one truck having said at least one first axle and wheel combination of said adhesion drive means, said electromagnetic means being independent of said adhesion drive means.
Claim 2
Dependent Claim
140 words
An electric car of a type comprising a car body, at least one truck provided with at least one first axle and wheel combination for supporting said car body, and adhesion drive means for driving the car through said at least one first axle and wheel combination from electric motors mounted on said truck, and an electromagnetic means for providing at least one of driving and braking forces to the car by electro-magnetic forces generated in said electromagnetic means, characterized in that said electromagnetic means is mounted with at least one further axle and wheel combination mounted on a second truck, said second truck being provided space and separated from said at least one truck having said at least one first axle and wheel combination of said adhesion drive means, said electromagnetic means being independent of said adhesion drive means.
Claim 3
Dependent Claim
23 words
An electric car as defined in claim 1, wherein said second truck is disposed between trucks being provided with said adhesion driving means.
Claim 4
Dependent Claim
26 words
An electric car as defined in claim 2, wherein said second truck is disposed between two separated trucks which are provided with said adhesion driving means.
Claim 5
Dependent Claim
20 words
An electric car as defined in claim 3, wherein said second truck is disposed centrally between said two separated trucks.
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |