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. 31, 1989
Filed:
Jun. 03, 1987
Goro Kakizawa, Tokyo, JP;
Ohken Seiko Co., Ltd., , JP;
Abstract
A small-sized pump comprising a common valve chamber, a plural number of pump chambers respectively arranged round the common valve chamber and each having a diaphragm, a drive member provided in the inclined state and serving to move the diaphragms upward and downward, and a tubular supporting member extending obliquely downward from the central portion of the drive member, the small-sized pump being arranged to make the end of the tubular supporting member perform circular motion and to thereby drive the drive member so as to move the diaphragms upward and downward so that respective pump chambers perform pumping actions with a predetermined time lag, the small-sized pump being thereby arranged to have high pumping efficiency.