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:
Apr. 07, 1992
Filed:
Jul. 15, 1991
Applicant:
Inventor:
John E Richmond, Doylestown, PA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61M / ;
U.S. Cl.
CPC ...
604 88 ; 604191 ;
Abstract
The syringe of the invention segregates various fluids or solutions within separate compartments of its barrel, to be delivered in a specific sequence as they are expelled from the delivery tip by actuation of its plunger. A plurality of stoppers are incorporated within the barrel, with all but the one adjacent to the plunger includng a piercing device to penetrate each following stopper in sequence. The length of the piercing shaft of each such device is selected sufficient to pierce the stopper advancing towards it, yet not so long as to reach the piercing shaft of that advancing stopper.