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:
Feb. 18, 2003
Filed:
Feb. 23, 2001
Masahito Yoshida, Shiki, JP;
Shoichi Kan, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides a compact pump capable of simultaneous sucking/discharging desired volumes of fluid in a plurality of systems, which includes a separating wall dividing a cylinder into a plurality of fluid compartments, discharging ports and sucking ports mutually arranged at opposite sides of the respective fluid compartments with respect to longitudinal direction, a plurality of pistons accommodated in the respective fluid compartments so as to slide in the respective fluid compartments and to divide respective fluid compartments into two rooms, and a common piston rod for the pistons passing through the separating wall to reciprocate the pistons in fluid compartments respectively.