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. 22, 1998
Filed:
Dec. 12, 1996
Applicant:
Inventors:
Tony James Baker, Highwoods, GB;
Roland Henry Carter, Hythe, GB;
Assignee:
Smiths Industries PLC, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61M / ;
U.S. Cl.
CPC ...
604151 ; 604218 ;
Abstract
A PCA pump has a fluid reservoir connected via a capillary and a gas vent filter to a cylinder having a piston urged outwardly by a spring to draw fluid into the cylinder. A button can be pressed by the user to press in the piston and dispense fluid. After actuation, the piston moves out to fill the cylinder with fluid and the button is disconnected from the piston until it has moved back to its outer position.