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:
Sep. 29, 1992
Filed:
Jul. 31, 1991
A Christopher Allison, Pacifica, CA (US);
Richard A Jaffe, Palo Alto, CA (US);
The Board of Trustees of the Leland Stanford Junior University, Stanford, CA (US);
Abstract
A disposable safety needle and syringe assembly includes a needle shield movably positioned within a syringe housing. Movement of the needle shield from the housing is effected by movement of the syringe plunger and plunger piston following completion of an injection whereby the needle shield envelopes the needle extending from the housing to prevent accidental needle sticks. The plunger piston is disengagable from the plunger at a limit of travel upon retraction of the plunger, thus maintaining the shield in a locked position enveloping the needle. The syringe and needle assembly can then be safely handled for disposal, and the possibility of inadvertent reuse of the needle and syringe is eliminated.