Importance

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Abstract

The suction injecting unit comprises a tubular housing adapted for receiving a disposable container for receiving the medicine to be administered, and having at one end a socket for exchangeably supporting a cannula and a removable suction cup, and at the other end a piston combined with a dosing mechanism that allows only a preset stroke of the piston. A suction apparatus controlled preferably by a pressurized gas is attached to the housing and is provided with control valves to successively establish an underpressure in the suction cup, and to maintain the underpressure in the cup while moving the piston about a predetermined stroke. CROSS-REFERENCE TO RELATED APPLICATIONS This is a division, of application Ser. No. 933,136, filed Aug. 14, 1978 now abandoned, which in turn is a continuation-in-part of my copending patent application Ser. No. 793,951, filed May 5, 1977, now U.S. Pat. No. 4,114,619 which in turn is a continuation-in-part of my application Ser. No. 634,741, filed Nov. 21, 1975, now abandoned, and the entire disclosure of which is herewith incorporated by reference. This application is also related to my copending patent applications Ser. No. 618,686 filed Dec. 21, 1975, Ser. No. 634,742, filed Nov. 21, 1975, and Ser. No. 639,685, filed Dec. 8, 1975, all of whose disclosures are also herewith incorporated by reference.

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First Claim