The present invention discloses an angle-adjustable crowbar that comprises a crowbar body and a crowbar head. The crowbar head includes a first hinge base and a second hinge base in a spaced manner, and a head of the crowbar body is rotatably mounted between the first hinge base and the second hinge base through an angle adjustment mechanism. The angle adjustment mechanism comprises a limit shaft penetrating through the first hinge base, the crowbar body and the second hinge base, a first tooth portion, a polygonal limit portion and a second tooth portion are sequentially disposed on an outer wall of the limit shaft in an axial direction. The angle-adjustable crowbar overcomes the defects that the limit strength of existing crowbars is weak, the tooth portion is unlikely to be damaged, and the crowbar head cannot be replaced.

A safety hammer is provided that may be designed to prevent injuries caused by flying nails when users accidentally fail to strike nails on their heads. The present invention may provide for a wooden handle with finger grooves. The wooden handle may be reinforced with a steel rod to add strength and attach the handle to the tempered steel head. Close to the end used for striking nails, the present invention may provide for a pin configured to attach the metal shield to the end used for striking nails. The track in the shield may fit over the pin to ensure the pin is positioned correctly around the face of the present invention's hammer face. In some embodiments, the shield may be secured by magnets, which may be embedded around the present invention's hammer head. The present invention may also provide for a fulcrum point that may be oriented above the nail removal portion of the present invention.

A compact impacting apparatus includes a spring anvil assembly with a spring, an anvil, and a barrel cam. A cam follower engages the barrel cam to energize the spring anvil assembly. The spring anvil assembly is thereafter released to impact a striker, which striker delivers impact force to an impact target. The spring anvil assembly may be biased in a starting operational position by the weight of the apparatus or the impact target. The spring anvil assembly may be disposed against a rotating pusher plate while engaged by the cam follower. Force of impact may be adjusted by repositioning the pusher plate and or changing the compression of the spring of the spring anvil assembly. The cam follower provides for repeated impacts upon the impact target and the striker holds the impact target in place for effective impacting.

Provided a hammer raising device configured to increase striking intensity by eliminating fluid resistance when a piston raised upward moves downward. To achieve this, the hammer raising device includes a hydraulic control valve that controls a supply of a fluid, a sub cylinder to which the fluid is supplied by an operation of the hydraulic control valve, a sub piston that is partially accommodated within the sub cylinder, and is raised or lowered by the fluid, a main piston that comes in close contact with a longitudinal end of the sub piston to be raised by the raising of the sub piston, and is lowered when the closely contacted longitudinal end of the sub piston is separated, and a main cylinder that accommodates the main piston.

A punch centering block device can include a first block and a second block. The first block can define a first reference surface and a first notch extending along a first axis. The first reference surface can lay flush on a workpiece. The first axis can be transverse to the first reference surface. The second block can define a second reference surface and a second notch extending along a centered second axis. The second reference surface can lay flush on the workpiece. The second axis can be transverse to the second reference surface. The first block and the second block can selectively abut one another and render the first axis and second axis collinear to receive a punch. The punch is slidable against the first notch and the second notch during the marking operation.

A force-limiting and damping device has a body, a tapping element, and an elastic element. The body has a connecting segment and a holding segment. The connecting segment is formed on an end of the body and has a mounting hole. The holding segment is formed on the body opposite the connecting segment. The tapping element is connected to the body to move relative to the connecting segment. The elastic element is mounted between the tapping element and the connecting segment to abut against the tapping element and to enable the tapping element to move relative to the connecting segment. The structural relationship between the connecting segment, the tapping element, and the elastic element may provide a delayed rebound and damping effect to the reaction force, and the applied force is continuously transferred to a tapping object, and this may reduce noise and the loss of energy.

A prior art powered wrist pin knocker is imported with a new plunger that prevents wobbling. The new plunger responds to a return vacuum pressure. The improved plunger is symmetrical along a longitudinal axis. New embodiments include a new side mount valve head to reduce length, a remote air controller and a variable length cylinder for the cannon. The new valve head is a simplified valve head assembly that adapts to an end of the cannon mount or a side mount or a remote mount. Another embodiment provides a stand for a surface mount application. This embodiment can have an extended piston for loosening tail bearings down a long channel. A manual return embodiment can use a rod to manually return the plunger to the proximal end for another firing cycle.

A force-limiting and damping device has a body, a tapping element, and an elastic element. The body has a connecting segment and a holding segment. The connecting segment is formed on an end of the body and has a mounting hole. The holding segment is formed on the body opposite the connecting segment. The tapping element is connected to the body to move relative to the connecting segment. The elastic element is mounted between the tapping element and the connecting segment to abut against the tapping element and to enable the tapping element to move relative to the connecting segment. The structural relationship between the connecting segment, the tapping element, and the elastic element may provide a delayed rebound and damping effect to the reaction force, and the applied force is continuously transferred to a tapping object. This may reduce noise and the loss of energy.

In a hand-held power tool including a gear for driving an output shaft, which is situated in an assigned gear housing, and including a mode-setting unit for setting the operating mode for an impact drilling mode, a drilling mode, or a screwing mode, the mode-setting unit including a rotatable actuating element and a rotatable setting element coupled to the rotatable actuating element. The setting element is coupled, at least in one operating mode, to a transmission element which is mounted on the gear housing and is axially displaceable on the gear housing in a screwing position assigned to the screwing mode and is axially fixed on the gear housing in impact drilling and drilling positions assigned to the impact drilling and drilling modes. The actuating element and the setting element are formed as one piece from plastic.

An adapter for a power tool including a housing, a tool-side connector, and a battery-side connector in electrical communication with each other. The tool-side connector is configured to couple to a power tool, and the battery-side connector is configured to couple to a battery pack. The adapter also includes a communication interface configured to couple with an external device, and a controller. The controller is configured to determine a state of the power tool, operate in a data transmission mode when the power tool is in the idle state, operate in a pass-through mode when the power tool is in the active state, and switch between the data transmission mode and the pass-through mode based on the state of the power tool.