Needle-less injection instrument

Details Needle-less injection instrument Needle-less injection instrument

1982-04-14

1983-08-23

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

A61M 530

Patent

active

044001711

ABSTRACT:
In this injection instrument, the piston pump (A) is connected to a drive motor (B), of which the working piston (5), supported on a working spring (2), is arranged displaceably in a cylindrical bore (6) of the motor housing (1). A pressure chamber (7) which has supply devices (3, 8) and discharge devices for the pressure medium is formed in the bore (6). The working spring (2) is held in a tensioned position by a pawl (10) supported by a bolt (13), the bolt (13) being supported on an operating element (C).
So that injection can be initiated only when the nozzle (23) is pressed onto the subject, the bolt (13) is connected rigidly to the operating element (C), and its free end is arranged displaceably in the motor housing (1).

REFERENCES:
patent: 2671347 (1954-03-01), Scherer
patent: 2816544 (1957-12-01), Scherer et al.
patent: 2928390 (1960-03-01), Venditty et al.
patent: 4266541 (1981-05-01), Landau

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