Patent ID: 9439545
Filing Date: 2016-09-13
CPC Classification: A47L

Claim Text:
1. A window cleaning apparatus in which a pair of cleaning units respectively attached to both surfaces of a window by means of a magnetic attraction clean one surface or both surfaces of the window simultaneously while moving along the surface of the window, the apparatus comprising: a first cleaning unit disposed on one side of a window and having at least one built-in first magnetic module comprising a magnet; and a second cleaning unit disposed on the other side of the window so as to be opposed to the first cleaning unit, and having at least one built-in second magnetic module comprising a magnet having an opposite polarity to that of the first magnetic module of the first cleaning unit so as to generate a magnetic attraction between the first magnetic module and the second magnetic module, wherein the second cleaning unit comprises an induction electricity generating module for generating an induced electromotive force to produce electricity by using a change in the magnetic field generated from the first magnetic module and/or the second magnetic module, and wherein the induction electricity generating module comprises an induction coil installed at a fixed position.