Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1992-02-04
1994-01-18
Rosesnbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604211, 604218, 604232, 222 43, 222 46, 222 48, 222336, 222309, A61M 500
Patent
active
052795861
ABSTRACT:
An injection device medication delivery pen is provided for injecting fluids such as insulin within body tissue. The device includes a housing, a piston rod movably mounted within the housing, and a dose setting mechanism for controlling the movement of the piston rod with respect to a fluid containing cartridge removably positioned within the housing. The piston rod includes a plunger and a lead screw slidably positioned within the plunger. The plunger and lead screw are coupled by a pair of half nuts. The half nuts may be uncoupled from the lead screw in order to allow it to slide freely with respect to the plunger. A new cartridge may accordingly be installed quickly and easily as the lead screw is easily displaced by a new cartridge.
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Becton Dickinson and Company
Polutta Mark O.
Rosesnbaum C. Fred
Voellmicke John L.
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