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公开(公告)号：US20180073309A1
公开(公告)日：2018-03-15
申请号：US15561045
申请日：2015-04-02
发明人： Robert FELBER , Christoph HABERER , Thomas GALLER
IPC分类号： E21B17/07 , E21B17/03 , E21B19/086
CPC分类号： E21B17/07 , E21B17/03 , E21B19/086
摘要： The invention relates to an extendable cylinder (10), in particular an extendable cylinder for a drill head (2000), a drill head comprising an extendable cylinder, and a method of operating a drill head. The extendable cylinder comprises a shaft (100) with a shaft ring volume (101) between an inner part (110) and an outer part (120) of the shaft; a piston (200) with a piston ring volume (201) between an inner part (120) and an outer part (220) of the piston; the piston being moveable with respect to the shaft along a longitudinal axis (LX); a proximal end of the outer part of the piston being arranged between the inner and outer part of the shaft; and a distal end of the inner part of the shaft being arranged between the inner and outer part of the piston; and wherein the extendable cylinder is extendable and/or retractable along the longitudinal axis.
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公开(公告)号：US20180073307A1
公开(公告)日：2018-03-15
申请号：US15561046
申请日：2015-04-02
发明人： Thomas GALLER , Robert FELBER , Christoph HABERER
摘要： A multi-functional connector is arranged for connecting a functional drill element to a drill head, such as an extendable cylinder of a drill head. The multi-functional connector includes a first connecting element having a first receptacle, a second connecting element having a second receptacle, and a retainer element having a retainer opening. The first receptacle has at least two driving surfaces for transferring a torque in a first direction, the second receptacle has at least two driving surfaces for transferring a torque in a first direction and in a second, opposite direction, and the retainer element has at least one retaining section to prevent a movement of a second functional drill element relative to the second connecting element in a retracting position of the second functional drill element.
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