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. 28, 1996
Filed:
Sep. 21, 1994
TDK Corporation, Tokyo, JP;
Abstract
A micro pump which employs magnetostrictive or electrostrictive elements as solid drive elements and is capable of self-priming even though its flow rate is increased. In the pump, disk-shaped valve elements respectively having tapered protrusions on one side are used as check valves to reduce weight and made to follow the motion of liquids so as to smoothly open and close. Retainers for regulating the gap h between the valve seats and the valve elements are respectively provided with tapered recesses for guiding the protrusions of the valve elements, whereby the valves are prevented from contacting the retainers, thus undergoing less friction therewith, to ensure smooth opening and closure of the valves. Moreover, ringlike or sheetlike elastic materials are provided on the bottoms of the recesses to improve responsivity in the direction in which the valves are closed.