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:
May. 25, 1999
Filed:
Aug. 08, 1997
Masaki Ikeya, Oobu, JP;
Koichi Suda, Oobu, JP;
Aisan Kogyo Kabushiki Kaisha, Aichi, JP;
Abstract
Noise caused by a mechanical vibration with a vibrator feeder is reduced in a small flow rate powder supplying device. An adverse effect caused by the noise is reduced and a flow rate accuracy is increased. Its responding characteristic is made fast. A powder hopper, a ultrasonic motor, supplying pipes and tube are supported by a supporting member held by a weighing device provided with a weight sensor. A weight signal of a weight sensor is amplified by an amplifier provided with a low pass filter. It is sampled with an A/D converter and converted into a digital value. A flow rate of powder is calculated by a CPU, a motor driving part is controlled and an amplitude of the ultrasonic motor is adjusted in such a way that a flow rate of the powder may become a target value.