Abstract: A vacuum lifting device with a contractible and extensible suction tube and a suction cup, which device is provided with a valve house having an interior that is communicating with the interior of the suction tube. The valve house has an aperture for inlet of air and a valve device for regulating the air inlet by a valve body that is actuated by a rotary cam disc which is rotatable together with a rotary hand grip, which cam disc has a periphery designed to continuously displace the valve body an adjustable distance essentially perpendicular to the turning axis of the cam disc in dependence on the turning angle of the hand grip. A steep increase of the cam disc radius makes possible at need a stepwise displacement of the valve body in addition to the regulated distance.

Abstract: A golf club, especially a putter has a preferably a straight shaft and an elongation, connected in a first angle and a substantially elongated club head, at which golf club the second angle between the elongation axis of the shaft and the elongation axis of the club head called lie, and the third angle between the elongation axis of the shaft elongation and the vertical plane of the club head called loft, are settable, whereas the shaft elongation us releasably connectable to the club head by an elongated connect element, called hosel, with an elongation axis.

Abstract: A vacuum lifting device with a contractible and extensible suction tube and a suction cup, which device is provided with a valve house having an interior that is communicating with the interior of the suction tube. The valve house has an aperture for inlet of air and a valve device for regulating the air inlet by a valve body that is actuated by a rotary cam disc which is rotatable together with a rotary hand grip, which cam disc has a periphery designed to continuously displace the valve body an adjustable distance essentially perpendicular to the turning axis of the cam disc in dependence on the turning angle of the hand grip. A steep increase of the cam disc radius makes possible at need a stepwise displacement of the valve body in addition to the regulated distance.

Abstract: Methods and devices are provided for drilling with impregnated diamond drill bits in which the drill bit (30) automatically continues cutting. The speed of a drilling device (3) along a feed device (2) is determined, and the measured value is used for continuously controlling the feed cylinder (10) and a flushing medium pump (29) such that a substantially constant feed rate is achieved while simultaneously maintaining the rotational speed of the drill bit (30) within predetermined limits.

Abstract: A drilling device has a frame (1) with a feed device (2) for carrying a drilling device (3) movable to-and-fro for rotating a drill string (4). The drilling device includes a sensor (6) for sensing an end (7) of a drill string element (8) in the drill string (4), and a register for the position of the end (7) along the feed device (2) and for the displacement of the drilling device (3) along the feed device (2).