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:
Nov. 20, 2012
Filed:
Jul. 08, 2010
Wenjie Liu, Beijing, CN;
Wenjie Liu, Beijing, CN;
Other;
Abstract
The present invention provides a needle-retractable safety including an improved barrel type plunger, including a barrel, a needle retracted trigger and a supporting member. A front portion of the barrel is fitted over a sealing rubber pad, a slotted hole is disposed at a wall of the front portion of the barrel, a bearing piece is provided in the slotted hole, and one end of the bearing piece is connected to the front side wall of the slotted hole. The barrel and supporting member are provided with a snap-in structure, respectively, which make supporting member releasably engaged in said barrel. The supporting member is able to translate backwards under the action of a needle retraction force so that said bearing piece can be returned to such a position that said needle can be retracted backwards to the interior of the barrel.