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    A device for gripping workpieces
    1.
    发明公开
    A device for gripping workpieces 失效
    装置用于夹持工具。

    公开(公告)号：EP0162439A1

    公开(公告)日：1985-11-27

    申请号：EP85106178.8

    申请日：1985-05-18

    申请人： ZAYTRAN INC.

    发明人： Zajac, Theodore S.

    IPC分类号： B25B1/18 ,  B23Q3/08 ,  B25J15/00

    CPC分类号： B25B1/18 ,  B25J15/0253

    摘要： ] A device for moving gripping jaws into engagement with a workpiece comprising two coaxial fluid cylinders for moving the jaws. A piston fixedly connected with a gripping jaw moves in each of the cylinders. Fluid pressure is applied to opposite sides of the pistons to effect movement of the pistons away and toward each other to thereby move the jaws away and toward each other. A means is provided to insure synchronous movement of the two pistons. The means comprises a rod extending along the axis of the two cylinders. The pistons and the rod have a driving interconnection. The driving interconnection effects rotation of the rod in opposite directions upon movement of the pistons away and toward each other. A bearing assembly located between the two fluid cylinders supports the rod for rotation.

    Rotary actuator
    2.
    发明公开
    Rotary actuator 失效
    旋转驱动。

    公开(公告)号：EP0127080A1

    公开(公告)日：1984-12-05

    申请号：EP84105627.8

    申请日：1984-05-17

    申请人： ZAYTRAN INC.

    发明人： Zajac, Theodore S.

    IPC分类号： F15B15/08 ,  F15B15/22

    CPC分类号： F15B15/068 ,  F15B11/048 ,  F15B2211/7058 ,  F15B2211/755

    摘要： A rotary actuator (10) is operable under the influence of fluid pressure to rotate a driven member. The rotary actuator (10) includes a drive member (18) which extends into a chamber in a housing. Helical splines (62) interconnect a piston (44) and the drive member (18) to rotate the drive member (18) upon axial movement of the piston (44) in the chamber (22). The piston (44) is held against rotary movement relative to the housing (14) in one embodiment by a pair of rollers (130,132) that engage tracks (124,126) disposed on opposite sides of the piston (44) and in another embodiment by a corresponding oval-shaped configuration of a portion of the piston and an internal portion of the chamber in the housing. ln one embodiment of the invention, a rack gear on the piston rotates a pinion to actuate a valve and restrict fluid flow to the chamber when the piston is approaching an end-of-stroke position. A one-way clutch may be connected with the drive member so that the driven member is only rotated in one direction rather than being oscillated upon back and forth movement of the piston.