An impact tool (1) includes: a motor (10); an impact mechanism (115), which is rotatable about an output rotational axis (BX) and is operably driven by the motor; an anvil (16) having an anvil shaft (113) disposed forward of the impact mechanism, and a radially-outward-protruding anvil projection (114) that is impacted in a rotational direction by the impact mechanism; a hammer case (6) housing the impact mechanism; an anvil bearing (115) held by the hammer case and surrounding the anvil shaft; a first groove (121) formed on an outer-circumferential surface of the anvil shaft so as to encircle the output rotational axis; a second groove (122) formed on an inner-circumferential surface of the anvil bearing so as to encircle the output rotational axis; and a restraining member (123) having a first portion (124) disposed in the first groove, and a second portion (125) disposed in the second groove.

An impact tool (1) includes: a motor (10); an impact mechanism (115), which is rotatable about an output rotational axis (BX) and is operably driven by the motor; an anvil (16) having an anvil shaft (113) disposed forward of the impact mechanism, and a radially-outward-protruding anvil projection (114) that is impacted in a rotational direction by the impact mechanism; a hammer case (6) housing the impact mechanism; an anvil bearing (115) held by the hammer case and surrounding the anvil shaft; a first groove (121) formed on an outer-circumferential surface of the anvil shaft so as to encircle the output rotational axis; a second groove (122) formed on an inner-circumferential surface of the anvil bearing so as to encircle the output rotational axis; and a restraining member (123) having a first portion (124) disposed in the first groove, and a second portion (125) disposed in the second groove.

An anvil for use with a power tool may include a shank and ram lug. The stank may have a first end and a second end. The ram lug may extend radially from the second end of the shank. The am lug may include an impact surface configured to receive an impact force from a hammer of the power tool and an impact layer comprising the impact surface. The impact layer may have been formed via a treatment process to have an impact layer depth to an impact layer transitional material interface with an interior region of the ram lug. The impact layer may have a first hardness and the interior region of the ram lug may have a second hardness. The first hardness may be greater than the second hardness.

An anvil for use with a power tool may include a shank and ram lug. The stank may have a first end and a second end. The ram lug may extend radially from the second end of the shank. The am lug may include an impact surface configured to receive an impact force from a hammer of the power tool and an impact layer comprising the impact surface. The impact layer may have been formed via a treatment process to have an impact layer depth to an impact layer transitional material interface with an interior region of the ram lug. The impact layer may have a first hardness and the interior region of the ram lug may have a second hardness. The first hardness may be greater than the second hardness.

Rotary drive for driving a tool fitting of a hand-held power tool, in particular of a combination hammer or hammer drill, wherein the rotary drive is configured, with respect to a working axis of the tool fitting, to convert a thrust input movement into a rotary output movement, wherein the rotary drive is in the form of a slotted-link mechanism with a freewheel-mounted track body and a ball cage arranged coaxially with the track body, wherein, when the ball cage is subjected to the thrust input movement, at least one ball of the ball cage slides along in an endless track contour formed on an outer surface of the track body and thus brings about a rotation of the freewheel-mounted track body.

Rotary drive for driving a tool fitting of a hand-held power tool, in particular of a combination hammer or hammer drill, wherein the rotary drive is configured, with respect to a working axis of the tool fitting, to convert a thrust input movement into a rotary output movement, wherein the rotary drive is in the form of a slotted-link mechanism with a freewheel-mounted track body and a ball cage arranged coaxially with the track body, wherein, when the ball cage is subjected to the thrust input movement, at least one ball of the ball cage slides along in an endless track contour formed on an outer surface of the track body and thus brings about a rotation of the freewheel-mounted track body.

A spring hammer for rapping a surface, the spring hammer includes an anvil with an impact surface. The anvil can fastened to the surface to be rapped. A movable piston has a first end that is in operation moved towards the impact surface of the anvil. A guiding structure guides the piston to move in a defined direction with respect the anvil and a device for launching the piston to move the piston towards the impact surface of the anvil. The piston is a solid block in which the first end of the piston is machined to an integrated flexible spring geometry.

A spring hammer for rapping a surface, the spring hammer includes an anvil with an impact surface. The anvil can fastened to the surface to be rapped. A movable piston has a first end that is in operation moved towards the impact surface of the anvil. A guiding structure guides the piston to move in a defined direction with respect the anvil and a device for launching the piston to move the piston towards the impact surface of the anvil. The piston is a solid block in which the first end of the piston is machined to an integrated flexible spring geometry.

The hydraulic rotary-percussive hammer drill includes a body; a shank; a striking piston configured to hit the shank; a stop piston configured to position the shank in a predetermined balanced position, the body and the stop piston delimiting a first control chamber permanently connected to a high-pressure fluid feed-in conduit and configured to urge the stop piston forwards, and a second control chamber configured to urge the stop piston forwards. The hydraulic rotary-percussive hammer drill comprises a fluidic communication channel opening into the second control chamber, configured to supply the second control chamber with high-pressure fluid and provided with a calibrated orifice.

The hydraulic rotary-percussive hammer drill includes a body; a shank; a striking piston configured to hit the shank; a stop piston configured to position the shank in a predetermined balanced position, the body and the stop piston delimiting a first control chamber permanently connected to a high-pressure fluid feed-in conduit and configured to urge the stop piston forwards, and a second control chamber configured to urge the stop piston forwards. The hydraulic rotary-percussive hammer drill comprises a fluidic communication channel opening into the second control chamber, configured to supply the second control chamber with high-pressure fluid and provided with a calibrated orifice.