Abstract: The present invention relates to a hydraulic built-in valve (100) for a valve block (10), comprising a sleeve (110) that is introducible into the valve block, and a closing element (130). The sleeve comprises a first end region (111) which is connectable to a control cover. The sleeve comprises a second end region (112) which is at the opposite end from the first end region and is introducible into the control cover, wherein the second end region has, in a frontal end, a frontal opening (114), and the sleeve forms, between the first end region and the second end region, a shell (117), having an outer side and an inner side, and the shell of the sleeve has a multiplicity of shell apertures (119) separated by shell webs (118).

Abstract: Producing a screw connection between a drill head provided for ground boreholes and an element of a drill pipe includes using a device for holding the drill head provided for ground boreholes. The device is held by a first clamping device of a clamping-screwing device. The element to be connected to the drill head is held by a second clamping device of the clamping-screwing-device and the element of the drill pipe to be connected is moved by the clamping-screwing device in relation to the device such that the relative rotation movement between the drill head and the element of the drill pipe required for the desired screw connection is performed by the clamping-screwing device.

Abstract: The present invention relates in general to treated spacer fabrics and a method of preparing such spacer fabrics and more particularly to a spacer fabric being treated for imparting the spacer fabric with at least one or all of the properties selected from good flame retardancy, good oil repellency, high spray rating and low volatile emissions. Furthermore, the invention relates to the use of a specific liquid treating composition for preparing a treated spacer fabric having at least one or all of the properties selected from good flame retardancy, good oil repellency, high spray rating and low volatile emissions.

Abstract: The invention relates to a method for connecting a drill head (44), provided for earth drilling (deep drilling), to an element (58) of a drill pipe, and also to a method (10) for the form-fitting holding of a drill head (44) provided for earth drilling. The invention is based on the problem of providing a method and a device (10) for the form-fitting holding of a drill head (44) provided for earth drilling, which simplify the connection of a drill head (44) to an element (58) of a drill pipe. A device (10) according to the invention for the form-fitting holding of a drill head (44) provided for earth drilling comprises the following elements: a) a claw-like holding structure (12) for at least partially engaging around a gripping section (48) formed above a drill head (44), and b) a housing (14) having a circular or polygonal outer contour for holding in a clamping manner by way of a clamping/screwing device, said housing (14) being connected or connectable to the holding structure (12) for conjoint rotation.