The application relates to a double acting demolition device according to one embodiment for demolishing structures. The device includes a first crushing jaw for crushing operation, a first cutting jaw for cutting operation, and a combination jaw. The first jaws are separate jaws. The combination jaw is attachable to the first cutting jaw for constructing a second crushing jaw and to the first crushing jaw for constructing a second cutting jaw. The second crushing jaw is used jointly with the first crushing jaw in crushing operation and the second cutting jaw is used jointly with the first cutting jaw in cutting operation. In crushing operation, the first crushing jaw rotates around a fulcrum other than that of the second cutting jaw in cutting operation.

The application relates to a double acting demolition device according to one embodiment for demolishing structures. The device includes a first crushing jaw for crushing operation, a first cutting jaw for cutting operation, and a combination jaw. The first jaws are separate jaws. The combination jaw is attachable to the first cutting jaw for constructing a second crushing jaw and to the first crushing jaw for constructing a second cutting jaw. The second crushing jaw is used jointly with the first crushing jaw in crushing operation and the second cutting jaw is used jointly with the first cutting jaw in cutting operation. In crushing operation, the first crushing jaw rotates around a fulcrum other than that of the second cutting jaw in cutting operation.

A replaceable work part which has a base and a tooth portion provided on an upper side of the base. A plurality of mounting legs extend downward from the base. Each mounting leg defines a recess and is configured to engage a corresponding mounting structure formed on a jaw of the jaw assembly. The replaceable work part is mounted to the jaw by being inserted into the same from above and sliding the same onto the jaw in a sliding direction to engage the mounting legs with the mounting structures of the jaw. In this state, locking members are inserted between the replaceable work part and the jaw and secured to the replaceable work part to restrict movement of the replaceable work part in the direction opposite to the mounting direction.

A tool configured to cut a workpiece includes a tool head which has a receiving contour in which the workpiece is received, and a movable cutting edge with a cutting contour. In the course of a cutting process, the cutting edge passes through the receiving contour. The cutting edge is subjected to the effect of an advancement part and can be moved to such an extent in the cutting direction(s) that it can pass all the way through the workpiece. In an embodiment, a position of the cutting edge reached after the cutting edge has passed all the way through the workpiece, the cutting edge, with removal from the advancement part, can be moved out from the cutting direction(s).

A tool configured to cut a workpiece includes a tool head which has a receiving contour in which the workpiece is received, and a movable cutting edge with a cutting contour. In the course of a cutting process, the cutting edge passes through the receiving contour. The cutting edge is subjected to the effect of an advancement part and can be moved to such an extent in the cutting direction(s) that it can pass all the way through the workpiece. In an embodiment, a position of the cutting edge reached after the cutting edge has passed all the way through the workpiece, the cutting edge, with removal from the advancement part, can be moved out from the cutting direction(s).

The invention concerns a cutting device (1) for reducing the width of a ready-made roller blind blank (28) comprising a roller tube onto which a fabric has been wound. The cutting device (1) comprises a mandrel (13), which is adapted to be inserted into and hold an end to be cut of the roller tube, and a knife arrangement, which is adapted to circumferentially cut first the fabric wound on the roller tube and then the roller tube on the mandrel (13) such that the width of the ready-made roller blind blank (28) is reduced. The invention also concerns a ready-made roller blind blank (28), which comprises a roller tube, onto which a fabric has been wound and which is adapted to be cut by means of a cutting device (1) according to the invention. For this the roller blind blank (28) comprises a disposable wrapping, which bears a visible measurement scale along at least one end portion of the roller blind blank (28).

A cutting head for a hydraulic power tool includes a first jaw that includes a first ear configured with a slot for receiving a corresponding ear. The second jaw includes a second ear with a third ear bore that aligns in between a first ear bore and to a second ear bore of the first ear when the second ear is coupled in the slot of the first ear. The cutting head further includes a spring-biased flange coupled to a blade mounted to the first jaw and a retained coupled at a fixed position to a blade mounted to the second jaw. The retainer is configured to receive the flange during a cutting action such that the flange prevents the blades from shifting out of alignment during the cutting action.

As shearing blades of a first jaw portion, a shearing machines includes: a tip blade; a pair of first parallel shearing blades bent at an obtuse angle to the biting direction of the tip blade and disposed both sides of the blade width; and a pair of second parallel shearing blades bent at an obtuse angle to an attaching portion of the first parallel shearing blades and disposed on both sides of the blade width. As a tip blade, the shearing machine includes: a point blade a pair of tip tapered blades disposed on both sides of an end portion and whose blade width is increased toward the rear end; and a pair of tapered blades bent at an obtuse angle to an attaching portion of the rear end portion of the tip tapered blades and disposed toward the first parallel shearing blades.

As shearing blades of a first jaw portion, a shearing machines includes: a tip blade; a pair of first parallel shearing blades bent at an obtuse angle to the biting direction of the tip blade and disposed both sides of the blade width; and a pair of second parallel shearing blades bent at an obtuse angle to an attaching portion of the first parallel shearing blades and disposed on both sides of the blade width. As a tip blade, the shearing machine includes: a point blade a pair of tip tapered blades disposed on both sides of an end portion and whose blade width is increased toward the rear end; and a pair of tapered blades bent at an obtuse angle to an attaching portion of the rear end portion of the tip tapered blades and disposed toward the first parallel shearing blades.

A demolition shear and a piercing tip insert and nose configuration for a demolition shear which resists nose wear and resists retract forces exerted on the piercing tip insert in jamming situations and in the event of snagging of the piercing tip insert. The piercing tip insert includes first and second piercing tip halves, each half having an outer planar sidewall, a curved front wall extending laterally inward, and a bottom leg extending laterally inward defining a shearing edge and a piercing edge.