Suction injector
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United States of America Patent
Stats
-
Jul 19, 1983
Issued Date -
N/A
app pub date -
Feb 26, 1981
filing date -
Nov 19, 1974
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A suction injector comprises a suction cup and an exchangeable cannula inserted into the cup for injecting a liquid medicine under human skin by the action of a piston movable in a cylinder. The suction cup is formed with an outer chamber which accumulates negative pressure and an inner chamber closed with a membrane which is placed over the skin to be treated. A tubular member is provided in the suction cup having a number of flexible projections adapted to prevent communication of the negative pressure in the outer chamber to the inner chamber until the membrane is in pressure contact with the skin and to break this communication when the membrane with the skin are lifted towards the cannula.
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