Surgery – Means for introducing or removing material from body for... – Treating material introduced into body by contact with wound...
Patent
1993-01-11
1994-01-18
Hirsch, Paul J.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into body by contact with wound...
74 57, 81 922, B43K 500
Patent
active
052795527
ABSTRACT:
An intradermal injection device is described which is placed against the skin of a patient and uses a reciprocating needle to inject ink, dye or similar fluid under the patient's skin, usually in a predetermined visible pattern. Unlike prior art devices of this type, however, the present device is readily disassembleable for rapid and thorough cleaning, since it is formed of a plurality of components which fit together through easily separable and cleanable couplings such as overlapping sealed (O-ring interference) fits or by threads. It also has a unique structure which avoids potential contamination of the drive components by having the drive mechanism offset at a substantial angle from the axis of the reciprocating needle and needle drive shaft and also by preferentially including internal fluid passage barriers such as fluid knock-out spaces. The device is preferably formed of metal such as aluminum or stainless steel, and may be electrically or fluid driven.
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patent: 4644952 (1987-02-01), Patipa et al.
patent: 4798582 (1989-01-01), Sarath et al.
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