Demolition tools are presented including: a handle having a proximal end and a distal end; a prying head disposed along the distal end of the handle, the prying head including at least two tines mechanically coupled with a substantially cylindrical cross frame, where the at least two tines each includes: an upper surface forming a width, a proximal end and a distal end; a tapered base including a first end forming a profile complementary to the substantially cylindrical cross frame, the tapered base mechanically coupled to the cylindrical cross frame at the proximal end of the upper surface along the profile, the tapered base tapering upward towards the upper surface from the first end towards the distal end of the upper surface, where the at least two tines each form a fulcrum point where the tapered base is coupled with the cross frame.

A fluid discharger includes: a discharge nozzle configured to discharge fluid; a first rotation device configured to rotate the discharge nozzle; and a control device configured to control the first rotation device by remote operation. The control device includes a first mode control unit including a first automatic control unit configured to automatically perform reciprocating control of the discharge nozzle in a first rotation range set for each of the fluid dischargers; and a first switching unit configured to switch between a control signal to be outputted from the first automatic control unit and a control signal to rotate the discharge nozzle by a first rotation angle designated by remote operation. In a dust suppression system, this configuration can control the direction of the discharge nozzle by remote operation, and also can automatically reciprocate the direction of the discharge nozzle within a predetermined range.

A fluid discharger includes: a discharge nozzle configured to discharge fluid; a first rotation device configured to rotate the discharge nozzle; and a control device configured to control the first rotation device by remote operation. The control device includes a first mode control unit including a first automatic control unit configured to automatically perform reciprocating control of the discharge nozzle in a first rotation range set for each of the fluid dischargers; and a first switching unit configured to switch between a control signal to be outputted from the first automatic control unit and a control signal to rotate the discharge nozzle by a first rotation angle designated by remote operation. In a dust suppression system, this configuration can control the direction of the discharge nozzle by remote operation, and also can automatically reciprocate the direction of the discharge nozzle within a predetermined range.

The invention relates to a demolition robot (1), comprising a robot arm (2) with a saw tool (3) with an exchangeable saw blade (5), wherein the saw tool comprises a rotatable spindle (4) with an end portion (4.1) and a saw blade comprising a hub (6), and the saw blade hub is releasably arranged on the end portion (4.1) of the spindle with a torque-transmitting connection (7), wherein a release mechanism (30) for automatic exchange of the saw blade (5) is arranged on the robot arm.

Disclosed is a way of providing a surface processing method for concrete in which vitrifying is suppressed even when high-speed processing is performed. In a surface processing method of concrete, a surface of the concrete is irradiated with a laser beam so that a beam spot is scanned along a predetermined scanning pattern and the scanning pattern moves along the surface at a predetermined feed speed. When the beam spot repeatedly passes through a predetermined portion in the scanning pattern, an overlap ratio, which is a ratio of overlapping of a passage path of the beam spot over a passage path of the beam spot in an immediately preceding irradiation, is 90% or less.

Demolition tools are presented including: a handle having a proximal end and a distal end, where the handle includes a reinforcing gusset mechanically coupled with the prying head, and where the handle further includes at least three bends along a handle length; a prying head disposed along the distal end of the handle, the prying head including at least two tines mechanically coupled with a cross frame; and a striking head mechanically coupled with and disposed along at least one end of the cross frame.

Demolition tools are presented including: a handle having a proximal end and a distal end, where the handle includes a reinforcing gusset mechanically coupled with the prying head, and where the handle further includes at least three bends along a handle length; a prying head disposed along the distal end of the handle, the prying head including at least two tines mechanically coupled with a cross frame; and a striking head mechanically coupled with and disposed along at least one end of the cross frame.

A detonator includes a control circuit and a charging circuit. The control circuit receives a first signal transmitted using a voltage applied to a cable by a blasting device and transmits a second signal to the blasting device using a current flowing to the cable. The charging circuit performs a charging operation by receiving the voltage through the cable. The charging circuit stops the charging operation while the control circuit transmits the second signal to the blasting device.

A pry bar has a transversely disposed generally triangular cross-section handle grip portion having surfaces formed of a soft elastomeric over-molded material. The handle is formed with an inner hard thermoplastic core and molded over outer elastomeric cover. A metal tether receiving element and impact cap are fixedly secured at the handle proximate end.

A pry bar has a transversely disposed generally triangular cross-section handle grip portion having surfaces formed of a soft elastomeric over-molded material. The handle is formed with an inner hard thermoplastic core and molded over outer elastomeric cover. A metal tether receiving element and impact cap are fixedly secured at the handle proximate end.