Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1999-05-04
2000-07-11
Coggins, Wynn Wood
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604181, 604187, 604218, 604232, A61M 5315
Patent
active
060865695
ABSTRACT:
A hypodermic syringe for medical, dental or veterinary use of a conventional nature or employing prefilled cartridge ampules of injectable fluid. The syringe is arranged to allow the operator to automatically sense the amount of pressure being manually exerted by thumb pressure to express the fluid from the ampule or a fluid chamber into the patient. A slender elongated plunger mounted within the main body of the syringe is slidably moveable by thumb pressure against a thumb ring disposed at a distal end of the plunger. A spring-biased pressure indicator member is slidably moveable rearwardly for limited longitudinal movement with respect to the thumb ring and is deflected into the thumb of the operator a distance proportional to the fluid pressure at the syringe needle tip. The operator can thus sense indicia of fluid pressure produced while pressing the thumb ring to make an injection. Upon release of the plunger, the pressure indicator member is automatically retracted into its normal concealed position and away from the operator's thumb.
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Coggins Wynn Wood
Prescott Charles J.
Thompson Michael M
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