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:
Aug. 22, 2000
Filed:
May. 05, 1998
Shuichi Irikura, Hoi-gun, JP;
Amso Co., Ltd., , JP;
Abstract
A wiping radius of a wiper arm having a wiper blade connected to its top end is changed by a four-link linkage so that the wiper blade can clean a far corner of a windshield. The four-link linkage is constituted by two links pivotally connected to the wiper arm and to both axes fixed to a stationary frame, the wiper arm, and a stationary link formed between both axes. The wiper arm with the four-link linkage is driven by a drive mechanism including a motor and swings between upper and bottom positions. A passive biasing member is connected to the four-link linkage, so that the upward movement of the wiper arm from the bottom position is assisted and the downward movement toward the bottom position is resisted by the biasing member, thereby making driving load imposed on the motor substantially equal in both movements.