Contraves Ag

Cejn Ag

Kurt Schattmaier

Rudolf Heller

In a releasable plug-in socket coupling for one or more pipes or pipe elements sealingly insertable into a socket member, an annular groove-like chamber is provided for receiving a retaining element in the front area of the socket member. The retaining element, comprising individual, segmental portions, is held in the chamber by an elastic retaining ring. Each portion is tiltably supported with a correspondingly constructed top portion in the outer circumferential surface of the chamber and has on the side facing the pipe end surface a base portion provided with a first cutting edge and a second cutting edge spaced therefrom. An axially removable release ring is in operative connection with the retaining element so that when the release ring is axially displaced, the ring pivots the tiltable portions into the release position.

Releasable plug-in socket pipe coupling

An apparatus for assisting carrying out exact hand movements, especially those performed by a surgeon during complex micro-surgical operations, comprising at least one support accommodated to the human arm or the hand. There is provided only a single upright column, one end of which is supported in a hinge joint equipped with a first brake device in order to obtain a free, braked mobility throughout a predetermined spatial region or zone with regard to the position and orientation thereof and at the other end such upright column carries the arm support. This arm support is mounted to be freely rotatable about the lengthwise axis of the upright column and is equipped with means located in the upright column for the continuous or infinite elevational adjustment of the upright column and thereby the arm support. There is also provided a second brake device for fixing the desired elevational position of the adjusted upright column and its arm support.

Support device

A surgical chair for a doctor embodying an infinitely elevationally adjustable seat connected with a support column, a stand tube arranged within the support column, at which there is attached a base frame equipped with rollers and a lifting device within the stand tube. The lifting device is operatively connected with the support column and can be unblocked by a lever system so that the seat, depending upon the degree of loading thereof, is elevationally adjustable. A foot pedal located between two overhang members of the base frame is arranged with its upper edge at most 4 centimeters above the floor and with adjustable freedom of movement with respect to the floor. The foot pedal is secured by a lever to an angle lever pivotably mounted at the stand tube and acts upon a plunger of the lifting device. At least three guide grooves are provided at the support column and extend uniformly about its inner periphery and parallel to its central axis. At least two superimposed sets of spaced rollers are secured at the outer periphery of the stand tube in operable association with the guide grooves arranged at the support column.

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Zurich, Switzerland

Kurt Schattmaier