Surgery – Instruments – Electrical application
Patent
1990-08-13
1992-05-12
Hindenburg, Max
Surgery
Instruments
Electrical application
A61B 1732
Patent
active
051123290
ABSTRACT:
The invention relates to a medical instrument with an endoscope, in which a wire loop, gripping arms or the like are arranged in displaceable manner in the longitudinal direction of the endoscope, as well as with a telescopic periscope which is displaceable together with the wire loop electrode or the like and in which between a ring connected to the telescopic periscope and an axially displaceable slide, which, is connected to the wire loop or the like, are arranged first and second levers interconnected by means of a first joint so that the first lever is connected by means of a second joint to the slide, while the second lever is connected by means of a third joint to the ring, a connection between its end to the periscope and at its other end by a fourth joint being connected between the two joints of the second lever so that the ratio of the spacing of the fourth joint with respect to the first joint is selected so that there is a smaller periscope displacement than wire loop electrode displacement. In order to simplify construction and make handling easier, the invention proposes that the fourth joint of the second lever by arranged on the fixed ring and that the third joint be directly connected to the movable ring.
REFERENCES:
patent: 3901242 (1975-08-01), Storz
patent: 3973568 (1976-08-01), Iglesias
patent: 4060086 (1977-11-01), Storz
Drucker William A.
Hindenburg Max
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