Method and tool for precision cutting

    公开(公告)号:US10022770B2

    公开(公告)日:2018-07-17

    申请号:US12223570

    申请日:2007-02-02

    申请人: Willi Grimm

    发明人: Willi Grimm

    IPC分类号: B21D28/16 B21D28/26

    摘要: A method and tool for producing workpieces with small corner radii in relation to the cutting thickness and with greatly reduced draw-in by precision cutting in a precision cutting tool includes clamping the workpieces between two tool parts consisting of a respective top and bottom cutting dies and of a top and a bottom cutting punch. The workpiece is machined in a one-stage arrangement in at least two successive cutting sequences in different cutting directions with the following partial steps: (A) cutting out a semifinished product, matched to the workpiece geometry, in a first cutting operation in a vertical working direction with slight draw-in, and (B) finish cutting of the semifinished product, produced in step (A), in at least one further cutting operation in a working direction opposed to step (A), wherein the draw-in of partial step (A) is filled again at least in the corner region.

    Vacuum mixing device with operating element and pump for mixing polymethylmethacrylate bone cement

    公开(公告)号:US10022687B2

    公开(公告)日:2018-07-17

    申请号:US15371336

    申请日:2016-12-07

    摘要: A vacuum mixing device for mixing PMMA bone cement from a monomer liquid and a cement powder, the vacuum mixing device comprising at least one cartridge comprising an evacuable interior for mixing of the bone cement, a mixing device for mixing the content in the interior of the at least one cartridge, which is arranged movably in the interior, a receptacle for receiving a separate container containing the monomer liquid or comprising an integrated container containing the monomer liquid, an opening device, which is arranged in the region of the receptacle in a manner movable relative to the receptacle so that, by moving the opening device, a separate container arranged in the receptacle is openable by means of the opening device, or the opening device is arranged in the region of the integrated container in a manner movable relative to the integrated container so that, by moving the opening device, the integrated container is openable by means of the opening device, a pump, in which a movable plunger for generating a negative pressure is arranged and delimits a pump chamber of the pump, and a connection line, which connects the interior of the at least one cartridge to the pump chamber of the pump, wherein the vacuum mixing system comprises an operating element that is operatable from outside, wherein the plunger in the pump is movable manually by means of the operating element, and wherein the opening device is movable relative to the receptacle or relative to the integrated container by means of the same operating element, and the mixing device in the interior of the cartridge is movable by means of the same operating element in order to mix the content in the interior of the cartridge.

    Device for storing and mixing bone cement

    公开(公告)号:US10010362B2

    公开(公告)日:2018-07-03

    申请号:US14611419

    申请日:2015-02-02

    摘要: A device and/or method stores, mixes, and applies polymethylmethacrylate bone cement, wherein the device and/or method comprising a first container for a first pasty component, a dispensing plunger that is arranged such that it can be shifted in the first container and serves for extruding the content of the first container through a dispensing tube opposite from the dispensing plunger. The dispensing tube can be rotated and shifted in longitudinal direction through a feed-through in a side of the first container opposite from the dispensing plunger. A mixing facility is arranged in the first container, is secured to the dispensing tube, and is movable in the first container by moving the dispensing tube. At least one second container for at least one second component is arranged on the first container, whereby the internal space of the at least one second container is closed with respect to the internal space of the first container by means of a closure, which is openable. The at least one second container is limited, on the side opposite from the closure, by a dosing plunger, and whereby at least one limiting surface of the first container is formed by a mobile volume compensation element.