Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Reexamination Certificate
2006-08-29
2006-08-29
Sirmons, Kevin (Department: 3767)
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
C604S135000, C604S197000, C604S110000
Reexamination Certificate
active
07097634
ABSTRACT:
The present invention includes an automatic injection device that reliably provides automatic needle retraction even when manufactured with part and assembly tolerances typical of low-cost and high-volume manufacturing processes. The injector of the present invention includes a body, a syringe cartridge, a drive mechanism, and a bias mechanism. The drive mechanism includes an energy source, a drive member, and a compound plunger with a releasable coupling. Significantly, the compound plunger included in the drive mechanism is designed to ensure needle retraction occurs after the automatic injection device has delivered the desired dose of medicament. Moreover, the design of the compound plunger included in the injector of the present invention can compensate for part and assembly tolerances typical of low-cost, high volume manufacturing processes, enabling the fabrication of a low cost automatic injection device providing reliable automatic needle retraction.
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International Search Report from PCT/US03/24113 dated Nov. 6, 2003.
Alza Corporation
Nwaneri Angela N.
Schell Laura C.
Sirmons Kevin
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