Patent · US Expired

Motor reversing circuit for vehicle windshield wiper

US4355270A · kind A · utility

17Cited by
8References
5Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 2, 1981
Grant dateOct 19, 1982
Priority date—
Expiry dateDec 2, 2001

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB60S1/08
  • WIPO fieldTransport
  • WIPO sectorMechanical engineering

Abstract

A motor reversing control circuit for a motor vehicle windshield wiper has a motor driven cam with a first lobe defining a park position for the wiper and a second lobe defining, in relation to the first, a wipe angle. A park switch is actuated by either lobe to reverse the output of a flip-flop which controls motor direction. The motor is activated in response to one or more of (a) a main switch, (b) the unactuated park switch and (c) the flip-flop output signalling wiper movement toward the park position. An optional timer effective to delay the motor activation in response to the main switch provides a pause in the park position.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.