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. 13, 2014
Filed:
Nov. 04, 2008
Mitsuru Imai, Chichibu, JP;
Mitsuru Imai, Chichibu, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention provides a medicine ejection device which provides stable ejection even when a reservoir with high sealability is used and can eject an appropriate amount of medicine. A medicine ejection portionincludes an ejection nozzlefor ejecting a medicine and an elementwhich generates energy for ejecting the medicine from the ejection nozzle, and is connected to a medicine storing portionfor storing the medicine. The medicine storing portionis blocked from the outside air except a path through the ejection nozzle, so that when the medicine is ejected from the ejection nozzle, a pressure difference is formed between the outside and the inside of the medicine storing portion. A pressure unitwhich is a feature of the present invention pressurizes a movable wallwhen ejecting a medicine, which is displaced so that the volumetric capacity of the medicine storing portiondecreases due to the pressure difference.