Safety disposable needle structure

A disposable needle system for use by an operator in obtaining blood from a patient comprising, in combination:

• needle means having a first open end for insertion into the vein of a patient and having a second open end for transferring the patient blood to a collection device;
• a needle support member integrally attached to and disposed between the ends of said needle means;
• a first retractable sleeve having a first open end and a second rounded end and disposed over said first open end of said needle means with the rounded end thereof being adjacent to, and providing ingress and egress for, said first open end of said needle means;
• a second retractable sleeve having an open end and a rounded end and disposed over said second open end of said needle with the rounded end thereof being adjacent to, and providing ingress and egress for, said second open end of said needle means;
• first spiral spring means encompassing said first open end of said needle and extending from said rounded end of said first retractable sleeve to said needle support member;
• second spiral spring means encompassing said second open end of said needle and extending from said rounded end of said second retractable sleeve to said needle support member;
• said open end of said first retractable sleeve telescopically receiving said open end of said second retractable sleeve,
• a housing surrounding said needle support member and said telescoped open ends of said first and said second retractable sleeves;
• means on said first retractable sleeve to facilitate manual retraction thereof against the pressure of said first spiral spring;
• detent means disposed on said first retractable sleeve to assist in releasably locking said first retractable in a retracted position;
• means on said housing for receiving said detent means when said first retractable sleeve is retracted;
• release means carried by said housing to effect release of said detent means from said means on said housing for receiving said detent means;
• whereby,
• said first and said second retractable sleeves are movable from a first position wherein they provide a protective cover from the respective first and second open needle ends to a position wherein the first and second needle ends are exposed for use in obtaining and collecting blood from a patient and, after use, said first and said second retractable sleeves are moved back to the first position and thereby reduce the chance of accidental needle sticking of an individual handling and disposing of the used needle system.