A hydraulic, pneumatic, gasoline, diesel, or electric tool may include a spindle that is adapted for rotational movement. A swing arm may be coupled to the spindle such that rotational motion of the spindle is transferred to the swing arm. The swing arm makes contact with a piston such that the rotational motion causes the piston to move along a linear path. The piston may interact with an energy storage medium when the swing arm moves the piston in the first direction, causing energy to be stored in the energy storage medium. As the swing arm continues to rotate, the swing arm may lose contact with the piston, thus allowing the energy storage medium to urge the piston in a second direction opposite the first direction to strike an anvil. The swing arm may be a multiple roller swing arm. The energy storage medium may be a compound spring assembly.

The present disclosure generally relates to quick change attachments for a pneumatic percussive tool. The attachments convert a pneumatic percussive tool, such as an air impact tool with proximal attachment means, which has a pushing force, into a pneumatic percussive tool having a pulling force. Once attached to the pneumatic percussive tool, the attachments also provide a quick change feature for allowing pulling tools to be simply and easily removed and replaced.

A pneumatic tool includes: a drive mechanism which is configured to be driven by compressed air of a first pressure: and a valve mechanism which is configured to be actuated by compressed air of a second pressure, which is higher than an atmospheric pressure and lower than the first pressure, and which is configured to switch whether or not to supply the compressed air of the first pressure to the drive mechanism.

A pneumatic tool includes: a drive mechanism which is configured to be driven by compressed air of a first pressure: and a valve mechanism which is configured to be actuated by compressed air of a second pressure, which is higher than an atmospheric pressure and lower than the first pressure, and which is configured to switch whether or not to supply the compressed air of the first pressure to the drive mechanism.

A pneumatic chisel includes a housing having a double-acting pneumatic cylinder in which a piston including a chisel is movably arranged along a longitudinal axis. The cylinder has a work-side section and a return-side section. The return-side section includes a damping portion and a pressure-equalization opening. The work-side section includes an end-position damping member and a compressed air connection. A compressed air reservoir is connected to the return-side section of the cylinder. A chisel guide housing includes a sealing air chamber. The piston is constructed as one piece with the chisel.

A pneumatic chisel includes a housing having a double-acting pneumatic cylinder in which a piston including a chisel is movably arranged along a longitudinal axis. The cylinder has a work-side section and a return-side section. The return-side section includes a damping portion and a pressure-equalization opening. The work-side section includes an end-position damping member and a compressed air connection. A compressed air reservoir is connected to the return-side section of the cylinder. A chisel guide housing includes a sealing air chamber. The piston is constructed as one piece with the chisel.

A linerbolt removal tool, including: a housing; a moil supported for reciprocating movement by the housing; an inertial body located within the housing; a gas charged accumulator extending from the inertial body away from the moil; a piston moveable within the inertial body between a striking position at which the piston strikes the moil and a retracted position, whereby firing the piston from its retracted position to its striking position includes causing pressurised gas within the accumulator to accelerate the piston toward the moil, wherein the piston has a striking end for striking the moil and an opposing rear end; and a piston cap that encloses the rear end of the piston, wherein during firing, the piston and the piston cap initially accelerate together and prior to the piston reaching its striking position the piston cap separates from the piston, whereby the piston cap isolates the piston from the accumulator.

A linerbolt removal tool, including: a housing; a moil supported for reciprocating movement by the housing; an inertial body located within the housing; a gas charged accumulator extending from the inertial body away from the moil; a piston moveable within the inertial body between a striking position at which the piston strikes the moil and a retracted position, whereby firing the piston from its retracted position to its striking position includes causing pressurised gas within the accumulator to accelerate the piston toward the moil, wherein the piston has a striking end for striking the moil and an opposing rear end; and a piston cap that encloses the rear end of the piston, wherein during firing, the piston and the piston cap initially accelerate together and prior to the piston reaching its striking position the piston cap separates from the piston, whereby the piston cap isolates the piston from the accumulator.

A pneumatically operated tool driver has a debris suction apparatus including a dust gathering assembly fastened to the front head of tool driver and surrounding the tool, a venturi element mounted on the tool driver, and an air diverting apparatus that uses pressurized air to establish an airflow through the venturi element to create a suction upstream of the venturi element that draws debris from the dust gathering assembly to a dust collection site. The air diverting apparatus obtains the pressurized air from an exhaust diverter that captures pressurized exhaust air expelled through the tool driver's exhaust port, and from a capillary tube coupled to the tool driver's inlet air port.

A pneumatically operated tool driver has a debris suction apparatus including a dust gathering assembly fastened to the front head of tool driver and surrounding the tool, a venturi element mounted on the tool driver, and an air diverting apparatus that uses pressurized air to establish an airflow through the venturi element to create a suction upstream of the venturi element that draws debris from the dust gathering assembly to a dust collection site. The air diverting apparatus obtains the pressurized air from an exhaust diverter that captures pressurized exhaust air expelled through the tool driver's exhaust port, and from a capillary tube coupled to the tool driver's inlet air port.