A hydraulic hammer is disclosed having a piston and an accumulator membrane disposed external and co-axial to the piston. Additionally, a sleeve is disposed between the piston and accumulator membrane, wherein the sleeve has a plurality of radial passages formed therein that fluidly connect the accumulator membrane with the piston.

Certain exemplary embodiments can provide a hammer. The hammer comprises a head. The hammer further comprises a head cap. The head cap is releasably coupled the head via a threaded fastener. The hammer comprises a claw. The claw comprises two forks. At least one of the two forks defines a serrated edge. The serrated edge is constructed to grip a slick surface when pulling a nail with the claw from the slick surface.

The handheld power tool has a tool receptacle for accommodating a tool on a working axis (11) and an electric motor (5). A pneumatic percussion mechanism (6) has an exciter, which is moved back-and-forth by the motor (5) periodically in parallel to the working axis (11), a striker (14), which is movable on the working axis (11) and is coupled via a pneumatic spring (18) to the exciter, and an anvil (19), which is situated movably on the working axis (11) and is situated downstream from the striker (14) in the percussion direction (12). The anvil (19) has a cylindrical anvil section (22) having a diameter and multiple channels (30) extending over the entire length (31) of the anvil section (22). A cross-sectional area of the anvil section (22) is at most 5% less than a circular area defined by the diameter.

A demolition hammer includes a housing defining an interior cavity, a power cell having a front head, and a wear plate. The power cell is disposed within the interior cavity of the housing. The wear plate is interposed between the housing and the front head of the power cell. The wear plate includes a body defining a central longitudinal axis. The body has a face that includes a bottom end, a top end in spaced relationship to the bottom end along the central longitudinal axis, and a pair of lateral edges in spaced relationship to each other along a transverse axis that is perpendicular to the central longitudinal axis. The face includes an interface surface that defines at least one channel extending along the central longitudinal axis and that is in proximate relationship with the front head of the power cell.

The hand-held power tool has a tool socket, a motor and a pneumatic striking mechanism. The striking mechanism has an exciter driven by the motor along a working axis, a striker coupled to the exciter via an air cushion, and an intermediate striker arranged between the striker and the tool socket in the striking direction. The striking mechanism also has a guide in which the intermediate striker is guided. The guide has a first sliding surface that guides a first section of the intermediate striker, and a second sliding surface that is arranged offset relative to the first sliding surface in the striking direction and that guides a second section of the intermediate striker. A radial dimension of the first section of the intermediate striker is greater than a radial dimension of the second section of the intermediate striker.

A hand-held power tool, in particular a hammer drill or a combined hammer, includes a safety coupling via which torque transmission between a motor shaft and a transmission shaft of the hand-held power tool can be established and interrupted. The safety coupling includes a coupling part at the input end and a coupling part at the output end and can be actuated by a coupling actuator. Mutually complementary catch profiles, in particular similar to a crown gear set, by which the coupling part at the input end and the coupling part at the output end can be interlocked, are arranged on the coupling part at the input end and on the coupling part at the output end.

A hydraulic hammer is disclosed having a piston and an accumulator membrane disposed external and co-axial to the piston. Additionally, a sleeve is disposed between the piston and accumulator membrane, wherein the sleeve has a plurality of radial passages formed therein that fluidly connect the accumulator membrane with the piston.

An impact system for a hydraulic hammer is disclosed. The impact system may include a piston, a sleeve disposed co-axial with the piston, and an accumulator membrane disposed external to the sleeve. A first seal may be located at an end of the sleeve, and configured to connect the sleeve to the piston. The accumulator membrane may have an extension configured to engage a recess in the sleeve.

A hydraulic hammer is disclosed having a piston and an accumulator membrane disposed external and co-axial to the piston. Additionally, a sleeve is disposed between the piston and accumulator membrane, wherein the sleeve has a plurality of radial passages formed therein that fluidly connect the accumulator membrane with the piston.

The striking pin (16) is arranged in a bearing (29). The striking pin (16) has a circumferential surface (25) and a stop surface (27) facing in the striking direction (11). The bearing (29) has a sleeve (30) arranged coaxially to the working axis (10) as well as a catcher (32). The circumferential surface (25) of the striking pin (16) is installed so as to slide on the inside of the sleeve (30). The catcher (32) is arranged in the striking direction (11) of the stop surface (27) of the striking pin (16) in order to limit the movement of the striking pin (16) in the striking direction (11). A connecting link (35) is provided for purposes of causing the striking pin (16) to execute a rotation relative to the bearing (29) when the striking pin (16) moves in the striking direction (11). The connecting link (35) has a flank (42; 53) on the striking pin (16) and another flank (49; 52) on the bearing (29), whereby the two flanks (42; 53, 49; 52) that rest against each other during the movement rise in the striking direction (11) in the same circumferential direction (39).