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. 23, 2006
Filed:
Nov. 22, 2005
Gale H. Thorne, Jr., Bountiful, UT (US);
Nestor Rodriguez San Juan, Eaton, PA (US);
Michael Wallace Howlett, Salt Lake City, UT (US);
Bradley Carling Robinson, North Salt Lake, UT (US);
Gale H. Thorne, Bountiful, UT (US);
Gale H. Thorne, Jr., Bountiful, UT (US);
Nestor Rodriguez San Juan, Eaton, PA (US);
Michael Wallace Howlett, Salt Lake City, UT (US);
Bradley Carling Robinson, North Salt Lake, UT (US);
Gale H. Thorne, Bountiful, UT (US);
Infusive Technologies, LLC, Bountiful, UT (US);
Abstract
A valve assembly is disclosed which partitions a conventional syringe into proximal and distal chambers to provide a multi-chamber, sequentially dispensing syringe apparatus. Incorporated in the valve assembly is a valved stopper having a valve (e.g. a slit valve) and a separator which filters out gas from liquid being dispensed through the valve assembly. A syringe plunger communicates through fluid in the proximal chamber to force displacement of the valve assembly. The valve is actuated by differential pressure of a force greater than the valve assembly displacement force. The valve assembly may be made from two parts: (1) a valved stopper (may be molded from basic syringe plunger material); (2) a separator (may be injection molded from syringe barrel material). Key features of such a multi-chamber syringe apparatus are (1) fluids in the chambers are kept disparate; (2) the valve assembly may be used in conventional syringes; (3) gas in a closed chamber is filtered from delivered liquid; (4) bi-stable operation of a valve assembly valve permits reflux free operation; (5) a clinch in the separator holds the valve securely closed until the valve is opened by a predetermined action, such action being tactilely sensible. A tubing set is disclosed which may be added to provide a third disparate chamber.