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. 29, 2015
Filed:
Aug. 16, 2013
Applicant:
Allergan, Inc., Irvine, CA (US);
Inventor:
Christopher S. Mudd, Ventura, CA (US);
Assignee:
Allergan, Inc., Irvine, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61M 5/315 (2006.01);
U.S. Cl.
CPC ...
A61M 5/31511 (2013.01); A61M 5/31505 (2013.01); A61M 2005/31518 (2013.01);
Abstract
A medical syringe with an extendible plunger rod is provided which facilitates injection of a large volume of material, for example, a dermal filler. The rod may include an outer plunger rod, an inner plunger rod, a compression spring configured to exert force tending to push the inner plunger rod in a direction distal to the outer plunger rod, and a locking mechanism. The locking mechanism prevents movement of the inner plunger rod relative to the outer plunger rod while both the inner and outer plunger rods are depressed, until the outer plunger rod has been depressed a first predetermined distance.