04573976 is referenced by 315 patents and cites 4 patents.

An apparatus for injecting a substance into a human or animal comprising a body adapted to have the substance to be injected pass therethrough, a needle mounted on the body and a needle guard mounted on the body between an extended position in which the guard obstructs access to the point of the needle and a retracted position in which the guard does not materially obstruct access to the point of the needle. The guard is releasably retained in the retracted position, and interlocking members on the body and the guard are responsive to generally axial movement of the guard to the extended position for interlocking to substantially prevent movement of the guard back toward the retracted position.

Title
Shielded needle
Application Number
6/613460
Publication Number
4573976
Application Date
May 24, 1984
Publication Date
March 4, 1986
Inventor
Earl W Sampson
Ontario
CA, US
Norma A Sampson
Fullerton
CA, US
Agent
Weissenberger and Peterson
Assignee
Dolores A Smith
CA, US
IPC
A61M 5/00
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