Abstract: A rotation elastic damped cutting device of a slitting cutter with at least one cutting wheel and a driven shaft for driving the cutting wheel, allows absorption of an abrupt, shockproducing blocking force. A rotation elastic dampener is provided in a radial space between the driven shaft and the cutting wheel as a cylindrical bushing. The cutting wheel and the driven shaft are connected by at least one wall, respectively, and the elastomer is vulcanized on one of these walls. A circumferentially fixed metal sleeve is inserted between the elastomer and the other wall for causing a radial pressure on the elastomer, effecting a good friction grip between the elastomer and the metal sleeve.

Abstract: An anchor drilling implement for producing soil anchors is described, which is provided with a drill carriage and a pivotable and vertically adjustable drilling mount. The drill carriage comprises a caterpillar gear and an implement upper part rotatable by means of a turntable and carrying a support for the mount. The implement upper part also carries a driving cab in the immediate vicinity of the support, so that said cab performs all the support movements and an unrestricted view of the drill hole or shaft is ensured in any position of the mount. The drilling mount is preferably also provided with a tool magazine, which can be controlled from the driving cab.

Abstract: A slitting cutter with at least one drive unit which, by a cutting wheel gear, drives the driven shaft of the cutting wheels equipped with cutting teeth. Although optionally hitherto a clutch has been provided between the driving unit and the actual cutting wheel gear, abrupt blocking of jamming processes on the cutting teeth seriously stressed the cutting wheel gear. This is now inventively prevented in that a rotation-elastic damping member is provided gradually between the driven shaft and the particular cutting wheel.

Abstract: A trench cutter has cutting wheels with radially projecting cutting teeth and is arranged on a bearing bracket. Along the bearing bracket, hinged teeth are arranged on one edge of the cutting wheel hub. The hinged teeth have two arms, one arm serving as a control arm, which engages with a control ledge arranged on the bearing bracket, and the other arm serving as cutting tooth. The control ledge and the control arm form a wedge gear which forces the hinged teeth into a swing-out position in front of the free end of the bearing bracket.

Abstract: In a slotted wall milling cutter for excavation work, the milling wheel arranged laterally of a bearing bracket, mounted in rotary manner in the latter and equipped over its circumferential surface with radially projecting milling teeth has at least one milling tooth pivotable at right angles to the circumferential direction. This fixture permits a complete working of the entire milling cross-section.

Abstract: In the case of a plug connection for drilling or boring tubes, rods and worms for earth boring equipment with a male part and a female part, with a radial coupling for torque transfer and with an axial coupling having in the overlap zone of the male and female parts a locking device which can be introduced into an annulus for transferring axial forces, it is provided that the locking device is constructed as a multilink chain, which essentially extends around the entire annulus and which is introduced through the female part into the annulus via a single opening. This device provides a plug connection, which has a very simple construction and after extremely rapid installation is suitable for transferring very high forces.