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:
Dec. 03, 2002
Filed:
Apr. 19, 2000
David Paul Morris, Valencia, CA (US);
Nguyen Thai Dang, Torrance, CA (US);
PRC-DeSoto International, Inc., Glendale, CA (US);
Abstract
A syringe ( ) includes a tube ( ) defining a chamber ( ) with a dispensing opening ( ). A plunger ( ) is slidably mounted in the tube and is initially positioned at the end ( ) of the chamber opposite the dispensing opening. A dasher ( ) having an opening ( ) is positioned within the chamber at an intermediate point. A cylindrical barrier ( ) is detachably secured to the dasher ( ). Thus, with the barrier secured to the dasher, the barrier and dasher sealingly engages the tube dividing it into two subchambers ( ). An elongated rod ( ) extends through openings ( ) in the plunger and the barrier and is secured to the dasher. Rotation of the rod detaches the barrier from the dasher establishing communication between the subchambers. A locking sleeve ( ) frictionally secures the rod and the plunger together when the rod is moved to a retracted position (FIG. ). Furthermore, optionally the rod is hollow (FIG. ) and defines a third subchamber ( ) containing a third liquid.