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:
Jun. 09, 1992
Filed:
Mar. 22, 1991
Applicant:
Inventor:
Eugene C Greenwood, Costa Mesa, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61M / ;
U.S. Cl.
CPC ...
604110 ; 604220 ;
Abstract
A single use hypodermic syringe uses a generally cylindrical elongated syringe body defining a center bore and supporting a hollow needle in communication with the center bore through the inlet/output channel. A movable piston formed of an elastic material is sealingly supported within the syringe bore. A piston driver member extends into the syringe bore and is coupled to the piston. An annulus ring is fixed within the center bore near the inlet/outlet channel. The annulus permits the piston to pass over it when delivering an injection but locks onto the piston at the completion of the injection, precluding any further use of the syringe.