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    Pick Having A Supporting Element With A Centering Extension
    2.
    发明申请
    Pick Having A Supporting Element With A Centering Extension 审中-公开

    公开(公告)号：US20200378254A1

    公开(公告)日：2020-12-03

    申请号：US16943547

    申请日：2020-07-30

    申请人： Betek GmbH & Co KG

    发明人： Ulrich Kraemer ,  Heiko Friederichs

    IPC分类号： E21C35/19 ,  E21C35/18 ,  E21C35/193 ,  E21C35/197

    摘要： A round-shank pick having a pick head and a pick shank that includes a supporting element pierced along its longitudinal center axis by a mounting hole with an inside diameter for receiving the pick shank. A collar height, measured in the direction of the longitudinal center axis between an end, facing away from the seat surface, of the centering extension and the seat surface or between the end of the centering extension and an inner termination of a recess that is integrally formed in the supporting element in an indented manner with respect to the seat surface, is configured such that the ratio between the inside diameter of the mounting hole in the supporting element and the collar height is less than 8, and/or that the collar height is greater than an axial clearance of the pick mounted in a pick holder.

    Chisel holder for a soil treatment machine
    6.
    发明授权
    Chisel holder for a soil treatment machine 有权

    公开(公告)号：US10208593B2

    公开(公告)日：2019-02-19

    申请号：US15664137

    申请日：2017-07-31

    申请人： Wirtgen GmbH

    发明人： Thomas Lehnert ,  Karsten Buhr ,  Cyrus Barimani ,  Günter Hähn ,  Karl Kammerer ,  Markus Roth ,  Bernhard Diessner

    IPC分类号： E21C35/19 ,  E21C35/193 ,  B28D1/18 ,  E21C35/18 ,  E01C23/088

    摘要： The invention relates to a bit holder for an earth working machine, in particular a road milling machine, that comprises a bit receptacle in the region of a working side of a support member and that indirectly or directly carries an insertion projection on an insertion projection side of the support member, the support member comprising two stripping surfaces [first or second stripping surfaces] that form a stripping surface pair and are at an angle to one another. In order to achieve a stable and long-lived configuration with such a bit holder, provision is made according to the present invention that the support member comprises at least one further stripping surface that is at an angle to the two stripping surfaces of the stripping surface pair.

    EARTH WORKING MACHINE HAVING A ROTATABLE WORKING APPARATUS AXIALLY POSITIONALLY RETAINABLE WITH HIGH TIGHTENING TORQUE BY MEANS OF A CENTRAL BOLT ARRANGEMENT, AND METHOD FOR ESTABLISHING AND RELEASING SUCH RETENTION
    7.
    发明申请
    EARTH WORKING MACHINE HAVING A ROTATABLE WORKING APPARATUS AXIALLY POSITIONALLY RETAINABLE WITH HIGH TIGHTENING TORQUE BY MEANS OF A CENTRAL BOLT ARRANGEMENT, AND METHOD FOR ESTABLISHING AND RELEASING SUCH RETENTION 审中-公开

    公开(公告)号：US20180340301A1

    公开(公告)日：2018-11-29

    申请号：US15981035

    申请日：2018-05-16

    申请人： Wirtgen GmbH

    发明人： Christian Berning ,  Karsten Buhr ,  Markus Frankemölle ,  Thomas Lehnert ,  Andreas Salz ,  Hardy Wilhelmi

    IPC分类号： E01C23/088 ,  E01C23/12 ,  E21C35/193

    摘要： An earth working machine encompasses a machine body having a machine frame and a drive configuration rotationally drivable relative to the machine frame around a drive axis (A). It further encompasses a working apparatus (32) for earth working to which the drive configuration is releasably connected in drive torque-transferring fashion for rotation together, the drive configuration projecting from an axial end axially into the working apparatus (32) and the working apparatus (32) being retained on the drive configuration, against axial displacement relative to the drive configuration, by an accessible central bolt arrangement having a bolt axis collinear with the drive axis (A). Provision is made according to the present invention that the earth working machine encompasses a bolting moment bracing arrangement (82) which is connected or connectable in bolting moment-transferring fashion to a bolt component, helically movable relative to the drive configuration, of the bolt arrangement, and which comprises a bracing region (82e, 82gf) that is embodied for bolting moment-bracing abutment in a bracing bolting direction against a counterpart bracing region (84b, 84c), the drive configuration being embodied to be driven to rotate, in a rotation direction codirectional with the bracing bolting direction, while the bracing region (82e, 82f) is in abutment against the counterpart bracing region (84b, 84c).

    Tapered cutter bit and mounting block for the same
    9.
    发明授权
    Tapered cutter bit and mounting block for the same 有权

    公开(公告)号：US09890635B2

    公开(公告)日：2018-02-13

    申请号：US15196957

    申请日：2016-06-29

    申请人： Winchester E. Latham

    发明人： Winchester E. Latham

    IPC分类号： E21C35/183 ,  E21C35/193 ,  E21C25/10 ,  B28D1/18

    CPC分类号： E21C35/183 ,  B28D1/188 ,  E21C25/10 ,  E21C35/1936

    摘要： A cutter bit includes a wear resistant element replaceably mounted to a front surface immediately below the cutting surface of the cutter bit. The body of the cutter bit is generally formed of a hardened steel, the cutting surface can be a diamond composition fixed in a step in the upper end of the cutter bit including side edges that taper laterally outwardly toward a lower edge of the cutting surface situated adjacent to the wear resistant element and the wear resistant element is preferably formed of a carbide composition or a sintered diamond composition. The wear resistant element can have an upper edge that closely conforms to the shape of an adjacent lower edge of the cutting surface, and can be coupled to a front end of a stem passing through an opening in the cutter bit immediately below the cutting surface, the opening being perpendicular to at least a portion of the back surface of the cutter bit.