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:
Jun. 06, 1989
Filed:
Aug. 29, 1988
Futoshi Uchiyama, Kashiwa, JP;
Koichi Tsukamoto, Tokyo, JP;
Tomoyoshi Kurashige, Tokyo, JP;
Kaoru Furusawa, Kawasaki, JP;
Mitsumaro Koike, Tokyo, JP;
Agency of Industrial Science and Technology, Tokyo, JP;
Ministry of International Trade and Industry, Tokyo, JP;
Abstract
An apparatus for continuously supplying fine powder at a constant rate comprises a hopper for holding the fine powder, a first piezoelectric transducer disposed on the diaphragm for supplying vibration to cause discharge of the fine powder therefrom, a second piezoelectric transducer for detecting change in the frequency of vibration of the hopper with change in the amount of fine powder contained in the hopper and feeding the detected signal back to a driver for the first piezoelectric transducer so as to supply vibration to the hopper at a frequency determined on the basis of the amount of fine powder contained in the hopper.