US3712399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery power control device
Assignee: DUGARD C Ltd
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Filing: 1970-07-13
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Granted: 1973-01-23
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Expires: 1990-07-13
Abstract
Abstract An electric power control means for a vehicle includes a stack of carbon plates in the power supply circuit of the vehicle and means for applying pressure to said plates in accordance with the torsional stress in the vehicle transmission, the electric power being proportional to the pressure applied to the carbon plates so that the power is controlled in accordance with the requirements of the vehicle.
Inventors
- 👤 W Ruffle
- 👤 B Hemsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:49
CPC Classifications
B; B60; B60K; B60K1/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
134 words
In an electrically driven vehicle, electric power control means including a variable resistance in the power supply circuits of the vehicle provided by a stack of carbon plates and means for applying pressure to the stack to thereby alter the resistance of said stack, the electric power being proportional to said resistance, including a battery connected to provide said electric power, a driving motor and driving wheels mounted operatively on said vehicle, a torque translator incorporated in a drive from the drive motor of the vehicle to the driving wheels of the vehicle and said torque translator including means for producing a movement which is dependent upon the torque being transmitted for applying pressure to said stack such that it is controllable of the electric power delivered to the driving motor of the vehicle.
Claim 2
Dependent Claim
134 words
In an electrically driven vehicle, electric power control means including a variable resistance in the power supply circuits of the vehicle provided by a stack of carbon plates and means for applying pressure to the stack to thereby alter the resistance of said stack, the electric power being proportional to said resistance, including a battery connected to provide said electric power, a driving motor and driving wheels mounted operatively on said vehicle, a torque translator incorporated in a drive from the drive motor of the vehicle to the driving wheels of the vehicle and said torque translator including means for producing a movement which is dependent upon the torque being transmitted for applying pressure to said stack such that it is controllable of the electric power delivered to the driving motor of the vehicle.
Claim 3
Dependent Claim
33 words
In an electrically driven vehicle, electric power control means as claimed in claim 1, in which a spring is provided to oppose said pressure and urge said stack to a substantially open-circuit state.
References Cited (Backward Citations)
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 |