The invention relates to a device for transmitting energy to a fastener, with a reaction chamber, an energy-transmission element that can move in a fastening direction for transmitting energy released in the reaction chamber to a fastener, a first supply channel opening into the reaction chamber for feeding a first reagent to the reaction chamber, wherein the first supply channel comprises a feeder device for feeding the first reagent into the reaction chamber and a controllable closing device for a time-wise closing of the first supply channel.

Disclosed is a fluid hammer tool with two separate fluid hammers in separate sections of the tool. The tool includes an upper poppet valve assembly along one fluid flow path, and a lower poppet valve assembly along a separate outer flow path. Both fluid flow paths are fed from an upper sub and both exit through a lower sub. Both poppet valves include spring return mechanisms. Sealing of each poppet valve propagates an upstream shock wave. The lower poppet valve assembly encounters greater fluid flow and generates a larger shock wave. In the period when the upper poppet valve is closed, the lower poppet valve cannot open.

A percussion unit for a rotary hammer and/or percussion hammer includes a control unit that is configured for open-loop and/or closed loop control of a pneumatic percussion mechanism. In at least one operating state in which the control unit changes from an idle mode to a percussion mode, the control unit is configured to adjust at least one operating parameter temporarily to a starting value.

A cooling gas is fed from an ejection nozzle into the interior of a through-hole which is formed in a radially central portion of a main spindle, and which penetrates through said main spindle in an axial direction. The cooling gas passes through radial venting holes provided in a plurality of locations, in the circumferential direction, in an axially intermediate portion of the main spindle, is fed into axial venting holes provided in a plurality of locations, in the circumferential direction, extending from one axial-direction end of the main spindle to an intermediate portion thereof, is caused to flow through the axial venting holes, and is discharged from discharge holes.

A cutting tool mechanism 11 for providing a cutting, abrading or grinding action is disclosed. The mechanism 11 has an inner circular part 17 having teeth 19 extending radially outwardly, a surrounding circular part 25 having inner teeth 27 extending radially inwardly. The circular parts 17 and 25 co-operate by engagement their teeth 19 and 27. Rotation of one circular part causes the other to move constrained by the engagement of the teeth in an orbital, oscillatory or impact motion. An input coupling 81 is provided for transmission of rotary motion, and an output coupling 37 is provided to transmit said orbital, oscillatory or impact motion to a blade 13. In further embodiments, the surrounding circular part 25 can be provided with outwardly extending teeth and surrounded by a further outer circular part with inwardly extending teeth, to cooperate with the outwardly extending teeth, to provide more complex orbital, oscillatory or impact motion.

The present invention relates to a versatile nail magazine for a nailing gun. In certain embodiments, the versatile nail magazine includes an elongated nail magazine body for loading nails. The nail magazine body includes: a front end connected to a nailing head of the nailing gun, and a rear end for reloading various types of nails, a nail shank track having a lower end, and an upper end, a nail head track disposed on the upper end of the nail shank track, and one or more nail head positioning protrusions disposed between the upper end of the nail shank track and the nail head track for securing the plurality of nails. The nail shank track, and the nail head track extend lengthwise along nail magazine body. Nails in a nail strip are loaded in the nail head track, and the nail shank track from rear end of nail magazine body.

Positive feed tools that include gear heads configured to be driven by a motor. The gear heads further include a pneumatic manifold that provides for access to input/output signals to add on additional components that include additional air logic functionality. The gear head includes first and second interface positions. Each interface is configured to receive either the motor for powering the gear head or an add-on component to provide additional functionality to the tool.

A machine tool is disclosed. The machine tool has a tool receptacle for receiving a tool on a working axis, a housing, and a striking mechanism. An impact stop is provided for a beater or an intermediate beater. An impact absorber has two polymer-based absorber rings that are offset axially to one another and are disposed so that they overlap radially and has two iron-based disks disposed axially between the absorber rings.

An automatic fastening device includes a driving mechanism for driving a double-headed fastener and a magazine for receiving and delivering the double-headed fastener to the driving mechanism. The magazine includes a first channel that receives a first head of the fastener and a second channel that receives a second head of the same fastener. The first and second channels guide the fastener along the magazine and toward an actuation component of the driving mechanism for driving the fastener into an object. A plurality of double-headed fasteners are inserted into the magazine, guided by the magazine to the driving mechanism, and driven one at a time into an object such that the first head of the fasteners extends from the object for easy removal of the fasteners.

An improved pile hammer provides a cylinder, such as one with a uniform interior diameter wall and uses a piston ram to cycle up and down therein to contact an anvil on a downstroke. The anvil preferably provides a cavity to both lessen the weight and improve upward force on the ram for the upstroke. An air inlet is preferably located above an air outlet which was not possible with prior art designs. An air reservoir can be located above and external to the wall in the cylinder.