Windshield wiper system incorporating a variable speed DC motor
US5506483A · kind A · utility
18Cited by
18References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1994 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Nov 3, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S318/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A windshield wiper control system improves vehicle windshield wiper operation by selectively controlling the motor speed of a dc motor that drives the wiper blade across the windshield. The motor speed is reduced for a portion of the wiper pattern adjacent the reversal points at each end of the wiper pattern. The motor speed is changed as a function of blade position by varying the duty cycle of an excitation voltage signal provided to a variable speed dc motor. The disclosed embodiment is useful for variable and continuous speed control in a vehicle wiper system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.