Hypodermic anesthetic injection apparatus and method
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United States of America Patent
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Jan 19, 1993
Issued Date -
N/A
app pub date -
Feb 8, 1991
filing date -
May 30, 1986
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An aspirating hypodermic syringe and method for injecting dental anesthetic in which anesthetic flow through the needle is established independently of the fingers of the operator and in which different rates of flow are provided, including positive flow while the needle is entering the tissue. Effective aspiration in syringes which use expendable anesthetic vials is assured by means of a yieldable resistance member in the syringe which holds the vial with sufficient force to enable the syringe plunger to lock positively onto the piston of the vial.
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Family
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