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:
Dec. 04, 2001
Filed:
May. 10, 1999
Applicant:
Inventor:
Allan Dagsland, Karlshamm, SE;
Assignee:
Astra Aktiebolag, Sodertalje, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61M 1/600 ;
U.S. Cl.
CPC ...
A61M 1/600 ;
Abstract
A powder inhaler for administering powder by inhalation, comprising a chamber (,) which includes a base member (,) and a peripheral wall member (,), wherein the chamber (,) includes a first inlet (,) through which a first stream of air containing powder is in use drawn on inhalation by a user and a plurality of second inlets (,) at the junction between the base member (,) and the peripheral wall member (,) through which a plurality of second streams of air of combined lesser flow than the first stream of air are in use drawn on inhalation by the user so as to minimize retention of powder at the junction between the base member (,) and the peripheral wall member (,).