Step stall prevention for vehicle steps
US5085450A · kind A · utility
105Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1990 |
| Grant date | Feb 4, 1992 |
| Priority date | — |
| Expiry date | Dec 13, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/0858
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system for extending and retracting a step, such as a step of a recreational vehicle, includes an electric motor coupled to extend and retract the step, and a circuit for energizing the motor. The circuit comprises a first circuit including a circuit breaker and connected to selectively energize the motor via the circuit breaker in one rotation direction to extend and retract the step, and a second circuit responsive to opening of the circuit breaker for energizing the motor in an opposite rotation direction to retract the step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.