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:
Sep. 11, 2001
Filed:
Sep. 04, 1997
Applicant:
Inventors:
John MacAndrew, St. Neots, GB;
William Revell, Sudbury, GB;
Paul Robertson, Chrishall, GB;
Elna Berg, Dalby, SE;
Magnus Jeppsson, Lund, SE;
Assignee:
Astra Aktiebolag, Sodertalje, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61M 1/500 ;
U.S. Cl.
CPC ...
A61M 1/500 ;
Abstract
An inhalation device for use with an inhaler is disclosed. The device includes a dispersion chamber constructed for fluid communication with the inhaler and a suction chamber of variable internal volume in fluid communication with the dispersion chamber. The internal volume of the suction chamber can be increased during use, producing a negative pressure in the dispersion chamber, thereby drawing a substance to be inhaled from the inhaler into the dispersion chamber for subsequent inhalation.