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:
Jan. 31, 1989
Filed:
Apr. 21, 1987
Osamu Fukutomi, Tokyo, JP;
Nihon Biso Kabushiki Kaisha, Tokyo, JP;
Abstract
An apparatus for cleaning windowpanes of a building comprises a unit suspended from the roof of the building and being capable of ascending and descending along the building. An opening portion is formed in the front portion of the unit and a cleaning head is provided in this opening portion. The cleaning head can be adjusted in its position and can be accurately positioned against a windowpane to be cleaned by reducing a relative velocity of a scraper attached to the cleaning head to zero by ascending the cleaning head while the unit is descending. The scraper and a rotary disc for sprinkling water are secured to a movable member provided in the cleaning head. The scraper can not only approach and withdraw from the windowpane but also incline with respect to the windowpane. An air curtain is formed below the scraper so as to guide soiled water left after wiping of the windowpane by the scraper into a soiled water collection portion.