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. 16, 2001
Filed:
Nov. 16, 1998
Junichi Uno, Tokyo, JP;
Hatsuo Yotsumoto, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A negative ion generating apparatus includes a ground electrode having a nozzle portion and surrounding a discharge electrode at a position spaced from the ground electrode, a power supply for supplying a negative high voltage to the discharge electrode, a ventilator for drawing air from an inlet and blowing the air between the electrodes. A high voltage induces corona discharges between the electrodes. The ionized negative ion particles produced in the discharge are blown out of an outlet. Alternatively, the ground electrode is a cylinder with a smaller downstream cross-section. The discharge electrode increases the velocity of gas flow and the high speed gas is ionized near the discharge electrode, increasing the rate of generation of negative ion particles. The discharge electrode may include needle electrodes to increase the rate of generation of the negative ion particles.