Patents by Inventor Elgene R. Gillespie

Elgene R. Gillespie has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Safety medical syringe with retractable needle
    Patent number: 5935104
    Abstract: A syringe for giving medical injections which has an internal mechanism for releasing and retracting a needle into the syringe after the injection has been given and retaining the needle and a hollow plunger inside the barrel of the syringe to reduce the risk of accidental needle sticks. The interior of the hollow plunger is initially hydraulically sealed off by a plunger front end wall from the fluid chamber of the syringe to prevent fluid from entering the interior of the hollow plunger. After the plunger has been depressed to expel fluid from the barrel, further depression of the plunger causes cutting punch type members to sever a disc shaped flange portion of a stem type needle retaining member and the plunger front end wall thereby permitting the spring to propel the needle and needle retaining member into the hollow plunger thereby retracting the needle and retaining member inside the barrel.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: August 10, 1999
    Assignee: Safety Medical Manufacturing, Incorporated
    Inventors: Gregory A Janek, Morris M Lee, Elgene R Gillespie
  • Safety medical syringe with retractable needle
    Patent number: 5882342
    Abstract: A syringe for giving medical injections which has an internal mechanism for retracting the needle into the syringe after the injection has been given and locking the needle and plunger inside the barrel of the syringe to reduce the risk of accidental needle pricks. In one embodiment the needle is retracted by a tension spring into a compartment inside a hollow plunger and in the other embodiment the needle is propelled by a compressed spring into a compartment within the plunger. In both embodiments, the interior of the hollow plunger is hydraulically sealed off by a barrier from the fluid chamber of the syringe to prevent fluid from entering the interior of the hollow plunger.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: March 16, 1999
    Assignee: Safety Medical Manufacturing, Inc
    Inventors: Donald L Cooper, Douglas E Boyd, Roger W Smith, Elgene R Gillespie
  • Safety hypodermic syringe with retractable needle
    Patent number: 5180370
    Abstract: A syringe for giving medical injections which has an internal mechanism for retracting the needle into the syringe after the injection has been given and locking the needle and plunger inside the barrel of the syringe to reduce the risk of accidental needle pricks. In one embodiment the needle is manually retracted by pulling back on the plunger and in the other embodiment the needle is propelled by a compressed spring into a hollow chamber within the plunger.
    Type: Grant
    Filed: May 18, 1992
    Date of Patent: January 19, 1993
    Inventor: Elgene R. Gillespie