Improvements relating to injection needles

Abstract

Abstract 624,269. Hypodermic needles. HOSSAIN, S. A. June 23, 1947, No. 16560. [Class 81 (ii)] A surgical injection needle comprises two tubes, one tube capable of sliding within the other, the outer tube a, Fig. 1, having a sharpened end and the inner tube d having a blunt end, the tubes being formed respectively as extensions of a tubular shell b and of a cylinder e which slides within the shell. Fixed to the cylinder e is a pin g which slides in a slot h in the shell b, slots m and n being provided to retain the pin g at each end of travel of the cylinder e within the shell. In a modification, Fig. 4, the cylinder e has grooves p, q, either of which can be engaged by a set screw s. In a further modification, not shown, the grooves p, q, are engaged by a spring catch.

Inventors

No inventors recorded.

Bibliographic Details