A hand-held hydraulic assembly includes a work tool having a hydraulic cylinder or main body, a ram piston disposed in the hydraulic main body and a spring or other biasing member mounted on the ram piston. An interchangeable work head is selectively engaged to the ram piston of the work tool. The ram piston is axially displaceable in the main body for actuating the work head. A quick release coupling mounted to the work tool releasably connects the interchangeable work head to the work tool.

A hand-held hydraulic assembly includes a work tool having a hydraulic cylinder or main body, a ram piston disposed in the hydraulic main body and a spring or other biasing member mounted on the ram piston. An interchangeable work head is selectively engaged to the ram piston of the work tool. The ram piston is axially displaceable in the main body for actuating the work head. A quick release coupling mounted to the work tool releasably connects the interchangeable work head to the work tool.

A coupling arrangement for a tool, the coupling arrangement comprising a drive part rotatable about a rotation axis, the drive part comprising a drive profile; a driven part rotatable about the rotation axis, the driven part comprising a driven profile complementary to the drive profile, the driven profile being arranged to mate with the drive profile in a coupled position for torque transfer between the drive part and the driven part; and an aligning arrangement arranged to force a relative rotation between the drive part and the driven part about the rotation axis from a nonaligned state of the coupling arrangement, where the drive profile is not rotationally aligned with the driven profile, towards an aligned state of the coupling arrangement, where the drive profile is rotationally aligned with the driven profile.

A coupling arrangement for a tool, the coupling arrangement comprising a drive part rotatable about a rotation axis, the drive part comprising a drive profile; a driven part rotatable about the rotation axis, the driven part comprising a driven profile complementary to the drive profile, the driven profile being arranged to mate with the drive profile in a coupled position for torque transfer between the drive part and the driven part; and an aligning arrangement arranged to force a relative rotation between the drive part and the driven part about the rotation axis from a nonaligned state of the coupling arrangement, where the drive profile is not rotationally aligned with the driven profile, towards an aligned state of the coupling arrangement, where the drive profile is rotationally aligned with the driven profile.

A clamping system having first and second clamping mechanisms with respective contact faces, that are couplable such that the contact faces press together with a coupling force. The first clamping mechanism has first and second elements and at least three clamping spheres, the first and second elements being twistable relative to one another, and the clamping spheres being mounted on fixed positions of the second element to be rollable along a circular line. The second clamping mechanism has groove guides assigned to the clamping spheres which have helical groove courses in clamping portions. When coupling the clamping mechanisms, by twisting the second element relative to the first, first regions of the clamping spheres are moved to a clamping position which presses the contact faces together via coupling force. When coupling, the clamping spheres in the clamping portions roll over large distances, leading to low wear and activation with reduced force.

A clamping system having first and second clamping mechanisms with respective contact faces, that are couplable such that the contact faces press together with a coupling force. The first clamping mechanism has first and second elements and at least three clamping spheres, the first and second elements being twistable relative to one another, and the clamping spheres being mounted on fixed positions of the second element to be rollable along a circular line. The second clamping mechanism has groove guides assigned to the clamping spheres which have helical groove courses in clamping portions. When coupling the clamping mechanisms, by twisting the second element relative to the first, first regions of the clamping spheres are moved to a clamping position which presses the contact faces together via coupling force. When coupling, the clamping spheres in the clamping portions roll over large distances, leading to low wear and activation with reduced force.

A power tool comprising a housing, an electric motor positioned with the housing, a gear case positioned partially within the housing, and a spindle positioned partially within the housing. The electric motor defines a motor axis. The gear case comprises a plurality of first fins extending beyond the housing. The first fins are configured to dissipate heat from the gear case. The spindle is configured to rotate about the motor axis and comprising a tool bit receptacle configured to receive a tool bit.

A power tool comprising a housing, an electric motor positioned with the housing, a gear case positioned partially within the housing, and a spindle positioned partially within the housing. The electric motor defines a motor axis. The gear case comprises a plurality of first fins extending beyond the housing. The first fins are configured to dissipate heat from the gear case. The spindle is configured to rotate about the motor axis and comprising a tool bit receptacle configured to receive a tool bit.