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:
Jul. 24, 2018
Filed:
Feb. 22, 2016
3m Innovative Properties Company, St. Paul, MN (US);
Philip A. Jinks, Loughborough, GB;
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
The present invention addresses the problem of turbophoresis and provides a relatively simple and low cost solution for a metered dose inhaler, in particular, a pressure-actuated metered dose inhaler. A metering valve () comprises a valve body (), a valve stem () mounted within the valve body () and a spring element () for biasing the valve stem () in an 'at rest' position. A pre-metering region () is formed in the valve stem () which is provided with a miniature valve seal () at its inlet (). The miniature valve seal () effectively isolates the pre-metering region () from surrounding bulk formulation () within a canister () in which the metering valve () is mounted when the valve stem () is in the 'at rest' position.