Retractable non-reusable needle
OwnerJoshua Surowitzinventor
Life of this patent
Estimating the term…
Abstract
A syringe includes a needle mounted in a frangible plug at the tip thereof and is equipped with a plunger having a stopper at one end thereof with the end of the plunger having an opening for capturing the end of the needle that projects into the barrel of the syringe to allow the plunger to capture the needle so that when the plunger is retracted the needle will be withdrawn into the barrel of the syringe; the end of the plunger is also equipped with a stopper which is mounted on a section that is connected to the plunger through frangible links whereby when the plunger is withdrawn a selected distance, the links will be severed to retain the plunger and captured needle within the barrel.
Claims11
A syringe having a barrel including an interior wall, one end being open and receiving a plunger, the other end having a shape for supporting a member that removably supports a needle with said needle having an enlarged end of a selected size and including a centrally located passage,
- said plunger including at one end thereof a stopper for sealingly engaging the interior wall of said barrel, said stopper having an end including a needle capture opening for receiving and locking said enlarged end of said needle in said opening upon engagement of said opening with the end of a needle removably supported on said member, said needle capture opening being in the shape of a curved recess having a central axis and that tapers away from said central axis so as to wedge the end of said needle in said recess and having a portion of a size to receive said enlarged end of said needle,
- said stopper being carried on said one end of said plunger by a severable connecting member,
- said barrel including at least one separating member for separating said stopper from said first end of said plunger when said one end is withdrawn from said barrel past said separating member.
A syringe having a barrel including an interior wall, one end being open and receiving a plunger, the other end having a shape for supporting a member that removably supports a needle with said needle having an enlarged end of a selected size and including a centrally located passage,
- said plunger including at one end thereof a stopper for sealingly engaging the interior wall of said barrel, said stopper having an end including a needle capture opening for receiving and locking said enlarged end of said needle in said opening upon engagement of said opening with the end of a needle removably supported on said member, said needle capture opening being in the shape of a curved recess and having a portion of a size to receive said enlarged end of said needle,
- said stopper including a receiving portion for receiving said one end of said plunger and being carried on said one end of said plunger by a plurality of frangible fingers extending from said one end of said plunger into said receiving portion of said stopper,
- said barrel including at least one separating member for separating said stopper from said first end of said plunger when said first end is withdrawn from said barrel past said separating member.
Dependencies are inferred from the claim text.