Electric drive unit

US4369387A · kind A · utility

Assignee

• ITT Industries · US

Inventors

• Gerhard Haar · Leinfelden, DE
• Heinz Jakob · Bietigheim-Bissingen, DE
• Helmut Landa · Brackenheim, DE
• Erwin Mayer · Tauberbischofsheim, DE
• Hans Prohaska · Bietigheim-Bissingen, DE
• Theodor Schneider · Freudental, DE
• Karl-Friedrich Schubert · Bietigheim-Bissingen, DE
• Martin Weber · Jeffery Road, DE

Key dates

• Filing date: Mar 10, 1980
• Grant date: Jan 18, 1983
• Expiry date: Mar 10, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19842
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An electric drive unit particularly adapted for actuating windshield wiper assemblies includes a motor having it's armature shaft carrying aportion having two oppositely pitched worm threads. Two worm gear wheels are disposed each on opposite sides of the threaded portion and in engagement therewith. The axes of rotation of the worm wheels are in parallel. Two spur wheels are each concentrically seated on a respective worm wheel. The spur wheels each engage a wheel having its axis of rotation located in a plane defined by the axes of rotation of the worm wheels. The toothed wheel is connected to a drive shaft.