The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 1992
Filed:
Aug. 07, 1989
Jonathan P Spence, Cavalier, ND (US);
Spenco, Inc., Cavalier, ND (US);
Abstract
The invention comprises a rear view mirror having a surrounding frame with a sleeve mounted vertically along one vertical edge of the frame. The sleeve has a slot and a screw is mounted within the sleeve with a pair of spiral grooves of opposite pitch connected together at their upper and lower edges to form an oscillating path. A ring is slidably mounted on the screw with a pin on the ring engaging the screw in one of the grooves. A motor drives the screw to cause the ring to oscillate vertically in the sleeve and a wiper has an arm connected to the ring through the slot in the sleeve, so that the oscillation of the ring on the screw causes the wiper to oscillate upward and downward on the mirror to wipe the mirror to remove rainfall.