A cutting tool with blade parts having an application surface for a driving force, which essentially extends orthogonal to a cutting plane, is provided. A cutting force acting upon the blade parts causes a counterforce. A line of action of the cutting force extends differently from a line of action of the counterforce. Each application surface has an end facing the cutting plane and an end facing away from the cutting plane. The ends are located on the same side of the cutting plane. In order to reduce a cutting gap between blade edges, the end facing the cutting plane defines a first distance and that the first distance and/or a second distance are chosen such that an intersecting point lies in front of a line of action of the cutting force referred to a clockwise direction.

The application relates to a demolition device for demolishing a concrete structure according to one embodiment. The device has a crushing blade for crushing concrete, and a cutting blade for cutting metal or a pulverizing blade for grinding concrete, and a combination blade. The device can be attached to a utility machine in a detachable manner. The crushing and cutting/pulverizing blade are separate blades from each other. The combination blade is adapted to be used for crushing concrete with the crushing blade. The combination blade is adapted to be used for cutting metal with the cutting blade or for grinding concrete with the pulverizing blade. The combination blade has abutment surface parts for the crushing and cutting/pulverizing blade. The abutment surface part for the cutting/pulverizing blade makes possible a power transmission between the cutting/pulverizing and combination blade when using the combination blade for crushing concrete. The abutment surface part for the crushing blade makes possible a power transmission between the crushing and combination blade when using the combination blade for cutting metal or grinding concrete.

The application relates to a demolition device for demolishing a concrete structure according to one embodiment. The device has a crushing blade for crushing concrete, and a cutting blade for cutting metal or a pulverizing blade for grinding concrete, and a combination blade. The device can be attached to a utility machine in a detachable manner. The crushing and cutting/pulverizing blade are separate blades from each other. The combination blade is adapted to be used for crushing concrete with the crushing blade. The combination blade is adapted to be used for cutting metal with the cutting blade or for grinding concrete with the pulverizing blade. The combination blade has abutment surface parts for the crushing and cutting/pulverizing blade. The abutment surface part for the cutting/pulverizing blade makes possible a power transmission between the cutting/pulverizing and combination blade when using the combination blade for crushing concrete. The abutment surface part for the crushing blade makes possible a power transmission between the crushing and combination blade when using the combination blade for cutting metal or grinding concrete.

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.

A shear blade (2) is for a portable hydraulic cutting device, such as a rescue device having a blade body (9). The blade body (9) has an assembly region (18) and a cutting region (15), a cutting edge (16) in the cutting region (15), a contact surface (13), located on one side of the cutting edge (16), for an additional shear blade. An outer surface (14), located on the other side of the cutting edge (16), is provided to act on the object to be cut. The cutting region (15) has a recess (22) for receiving a cutting insert (21). The recess (22) is configured such that the cutting insert (21) is insertable into the recess (22) at an acute angle to the contact surface (13) of the shear blade (2).

A shear blade is for a portable hydraulic cutting device having a blade body. The blade body has assembly and cutting regions, with a cutting edge in the cutting region. A contact surface is on one side of the cutting edge for an additional shear blade. An outer surface on the other side of the cutting edge acts on the object to be cut. A first surface portion of the outer surface extends away from the cutting edge along an orthogonal, which meets the contact surface at the cutting edge, or at an acute angle relative to the orthogonal. A second surface portion connects to the first surface portion at an acute angle to the orthogonal. A third surface portion connects to the second surface portion at an acute angle to the orthogonal. Angle is smaller than angle , which is smaller than angle .

A single-piece, indexable or repositionable tip blade for a demolition shear is disclosed which substantially or completely shrouds the tang of the moveable jaw on five-sides. According to the invention, the single piece defines a first and a second piercing edge such that the blade is reversible and can be rotated and provides two edges for shearing. The demolition blade is a one piece, join line free structure which shrouds the entire tang, to allow for maximum results whilst piercing. The single-piece demolition shear blade comprising a blade body (401), said blade body comprising a cavity for receiving the tang of a moveable jaw of a demolition shear therein; said blade body having spaced apart first (413) and second (414) piercing edges; said indexable demolition shear blade being removably attachable to a jaw of a demolition shear in either a first or a second position; the indexable demolition shear blade being rotatable 180? between said first and second position; wherein, in said first position, said first piercing edge (413) is presented for piercing use and in said second position said second piercing edge (414) is presented for piercing use; and in either the first or the second position, the single-piece demolition shear blade substantially shrouds the tang of said moveable jaw of a demolition shear.

A powered threaded rod cutter includes first and second cutting dies, an electric motor, a planetary transmission positioned downstream of the motor, a drivetrain for converting a rotational output of the transmission to a pivoting movement of the first cutting die, and a clutch mechanism for redirecting torque from the motor away from a drivetrain and the first cutting die in response to the first cutting die seizing during a rod-cutting operation. The clutch mechanism includes a ring gear in the planetary transmission, and a spring that rotationally affixes the ring gear below a predetermined threshold of reaction torque through the drivetrain and permits rotation of the ring gear above the threshold.

In a first stage or operation, at least one shear initiation breakthrough opening is formed through the ultra-high strength material sheet at an interior location. A leading terminal end of each of at least two inclined shearing edges of an interior opening shearing tool is positioned in the at least one shear initiation breakthrough opening. The interior opening shearing tool is different from the breakthrough opening forming tool. In a second stage or operation, shearing of the material is initiated from the at least one shear initiation breakthrough opening by advancing the at least two inclined shearing edges of the interior opening shearing tool against the ultra-high strength material sheet and relative to a corresponding shearing tool.

An intelligent shearing mechanism and a strip cut-to-length shear are provided. The shearing mechanism includes an upper blade holder and a lower blade holder that are provided on a frame and arranged vertically and correspondingly; a left connecting rod and a right connecting rod that are arranged side by side are provided between the upper blade holder and the frame; moreover, a left eccentric shaft is provided at the joint between the left connecting rod and the frame, and a right eccentric shaft is provided at the joint between the right connecting rod and the frame, a guide cylinder rod is hinged between the upper blade holder and the frame. The shearing mechanism is applied to the strip cut-to-length shear.