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. 01, 2001
Filed:
Feb. 12, 1998
Applicant:
Inventors:
Warren R. Jewett, Cary, NC (US);
Robert C. Williams, III, Raleigh, NC (US);
Assignee:
IEP Pharmaceutical Devices Inc., Raleigh, NC (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61M 1/500 ; A61M 1/610 ;
U.S. Cl.
CPC ...
A61M 1/500 ; A61M 1/610 ;
Abstract
A metered dose inhaler pump for delivering a metered dose of an active compound from an active compound inlet through a spray outlet without the need of a pressurized active compound container. Reciprocating action of an inlet valve, an outlet valve and a plunger alternately draw a metered dose of the active compound from an active compound container into an active compound chamber and pressurize the drawn metered dose of the active compound to eject the metered dose through the spray outlet. The plunger substantially fills and evacuates the metered dose chamber, leaving no void head space therein.