Abstract: The invention relates to a rapid coupling for connection of an implement to an operating arm, with at least one pair of lock pins that are movably guided toward each other in alignment and that can be moved toward and away from each other by a drive and that penetrate into an aligned lock hole in the implement in their extended lock position. According to the invention, pre-centering device are provided to pre-center the retracted lock pins on the lock holes.

Abstract: The invention relates to a hydraulic piston-cylinder-unit (10) for a slewing drive with at least one piston, which can be slid in a cylinder and exhibits fastening means, by means of which the piston can be connected in such a manner to a coupling rod that the working tool can be swung by means of a movement of the piston. In accordance with the invention the cylinder exhibits fastening means, by means of which the cylinder can be connected to the working tool or to a carrier of the slewing drive.

Abstract: The invention relates to a hydraulically swung trenching shovel comprising a mounting part pivoted to the front end of an excavator shovel beam, on which mounting part the shovel may be pivoted by a hydraulic piston and cylinder unit around a pivot axis extending in the working direction, the piston and cylinder unit being arranged in a manner parallel to a cutting edge of the shovel in a carrying member provided in the upper edge region thereof and the mounting part is connected with a lever comprising a coupling rod for pivoting the shovel, said piston and cylinder unit being adapted to act on said lever. In accordance with the invention the coupling rod is directly pivotally connected on the piston and at the pivot point of the piston rod on the piston at least one rotary guide runner is rotatably mounted.

Abstract: A tool for mounting on an implement, in the case of which different functional working ranges are provided with which respectively separate operations are able to be performed. In order to create a multi-purpose tool of this type which at the same time has a high degree of strength and a long working life while making possible efficient operation, the tool has, in accordance with the invention, a center part, whose lateral flanks each constitute a part of the working tool, two lateral parts pivotally mounted on the center part which respectively constitute the other parts of the working tool, and at least one piston and cylinder unit for pivoting the lateral part in relation to the center part and locking elements, with which respectively one lateral part may be locked in relation to the center part.

Abstract: A scoop for a mobile implement such as an excavator or an excavator-like device is made in two parts in the form of scoop sections able to be pivoted about parallel pivot axes by a piston and cylinder unit. The scoop includes an attachment head so that the scoop may be pivotally connected with a boom of the mobile implement. In order to pivot the entire scoop laterally, a further piston and cylinder unit is integrally provided for lateral pivoting of the entire scoop about a central pivot axis in the attachment head, the further piston and cylinder unit is connected at one end with a pivot point, preferably one of the pivot axes of one of the scoop sections, and at the other end with a lever. The lever is connected at one end with a pivot point, preferably the other respective one of the pivot axes on the other respective scoop section and the other end of the lever is connected via a link with a projection on the attachment head.

Abstract: In an excavator, crane or the like comprising a base structure, a swivel arm connected to said base structure and a boom attachment releasably locked to said swivel arm, releasable locking means for said boom attachment comprising at least two locking pins passing therethrough and through said swivel arm, said locking pins being linked to at least one hydraulic piston-cylinder unit for inserting them through and withdrawing them from said boom attachment and swivel arm.

Abstract: A suspension for a replaceable hydraulically operable tool attachment on the tool holder excavator or crane comprises a fork member pivoted to the tool holder by pivot pins which contain bores to establish hydraulic communication between fluid supply and discharge passages in the tool holder and associated passages in the fork member leading to the tool.