Hypodermic needle assembly

Details Hypodermic needle assembly Hypodermic needle assembly

A - Human Necessities

61

M

A61M 5/32 (2006.01) A61B 5/15 (2006.01)

Patent

CA 2240920

A hypodermic-needle sample collection device includes an elongated, generally cylindrical barrel forming an aperture at the distal end of the barrel and opening into the interior of the barrel, and a needle holder mounted for longitudinal movement within the barrel. The needle holder includes a pin projecting laterally therefrom. A hollow needle carried by the needle holder projects from the holder along the axis of the barrel. The pin is guided by longitudinal linear and spiral guide surfaces extending along at least a portion of the length of the barrel for moving the needle longitudinally within the barrel in response to relative rotational movement between the linear and spiral guide surfaces.

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