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. 10, 2002
Filed:
May. 08, 1998
Risto Virtanen, Nurmijärvi, FI;
Astra Aktiebolag, Sodertälje, SE;
Abstract
An inhaler for administering powder by inhalation and a method of constructing the same, the inhaler comprising: a housing having a screw thread ( ) and a substantially circular sealing surface ( ) coaxial therewith; a mouthpiece ( ) attached to the housing; and a cap ( ) for covering at least the mouthpiece ( ), the cap ( ) having a screw thread ( ) for engaging the screw thread ( ) on the housing and a substantially circular sealing surface ( ) for engaging the sealing surface ( ) on the housing; wherein the sealing surfaces ( ) are shaped and dimensioned such that the radial force therebetween is substantially constant for any relative position where the sealing surfaces ( ) engage one another.