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:
Aug. 24, 1993
Filed:
Mar. 27, 1992
Applicant:
Inventors:
Hajime Miyazaki, Suwa, JP;
Masaaki Handa, Suwa, JP;
Taisuke Uehara, Suwa, JP;
Tsukasa Muranaka, Suwa, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340679 ; 310316 ; 310317 ; 310328 ; 3403094 ; 340691 ; 417 63 ;
Abstract
A micropump supervisory control method and apparatus having various functions, such as annunciation and safety measures. The control method and apparatus accurately control trace discharge rates through adjustment of the number and frequency of driving pulses for a piezoelectric valve element. In addition, the control method provides discharge, life-prediction and life-expiration warning, and operation acknowledge alarms and annunciations while driving the micropump, each having a predetermined sounding pattern. Micropump functions are also inhibited when a power source is reconnected.