Abstract: A hand-held drive-in tool for driving in fastening elements includes a drive-in ram (13) displaceably supported in a drive (30) for driving the drive-in ram (13) and having a driving spring member (31) for displacing the drive-in ram (13), a device (70) for preloading the driving spring member (31), a locking device (50) having a locking position (54) in which the locking device (50) retains the driving spring member (31) in its preloaded position and a release position (55) into which the locking device (50) is displaced upon actuation of an actuation switch (19) of the drive-in tool (10), and a mechanical blocking device (60) operating independently of the actuation switch (19) and having an active position (68) in which the blocking device (60) retains the locking device (50) in its locking position (54), and a passive position (69) in which the locking device (50) can be displaced in its release position. (55).

Abstract: A method for operating an internal combustion engine, injects fuel directly into a combustion chamber as a main injection, a postinjection and optionally also as a preinjection. An injection nozzle with a plurality of injection bores effects the preinjection and the postinjection preferably which is carried out cyclically. To minimize wetting of the combustion chamber walls, during the postinjection the partial quantities of fuel and a lift of the nozzle needle of the injection nozzle are set so that, for each partial quantity of the postinjection injected into the combustion chamber, the reach of the respective fuel jet in the combustion chamber is limited and the reach is less than the distance to a combustion chamber boundary.

Abstract: A hand-held drive-in tool driving fastening elements (60), e.g., nails in a workpiece (U) includes a magazine (61) projecting sidewise from the muzzle part (15) and having a spring-biased transporting slide (63) for displacing the fastening elements (60) in the magazine guide channel (62), a safety device (25) including a press-on member (14) secured on the tool muzzle part (15) of the tool, and a device (40) actuatable by the press-on member (14) for positioning of the transporting slide (63) and for displacing the transporting slide (63) against a biasing force of the transporting spring.

Abstract: A hand-held drive-in tool for driving fastening elements (60) in a workpiece (U) includes a drive-in ram (13) for driving the fastening elements (60) in the workpiece (U), at least one drive spring member (31) for driving the drive-in ram (13), a preloading device (70) for the drive-in ram (13) and the drive spring member (31), a locking device (50) which retains the drive-in ram (13) and the drive spring member (31) in a preloaded position (33) when the locking device is located in its locking position (54), an actuation switch (19), for initiating the drive-in process for displacing the locking device (50), and into a release position (55) thereof, and at least one further switch for displacing the locking device (50) in the release position thereof (55) independent from actuation of the actuation switch (19).

Abstract: A positioning device for a hand-held setting tool (10) includes an actuating switching device having an actuation element (24), a switching link (30) for connecting an actuation element (24) to the actuation switch (13) of the setting tool (10) and having a switching member axially displaceable relative to a stationary, with respect to the holder, structural component, and a safety device (50) for preventing actuation of the actuation switch (13) at a predetermined orientation of the setting tool (10) and including a displaceable blocking element (55), first and second annular recesses (51, 52) for receiving the blocking element and extending radially circumferentially about the structural component and about the switching member, respectively, with the first (51) and the second (52) annular recesses being open toward the switching member and the structural component, respectively, and with the blocking element (55) being completely positionable in one of the first and second annular recesses (51) in an opera

Abstract: A positioning device for a hand-held setting tool (10) having an actuation switch (13) for actuating the setting tool (10), with the positioning device including a rod-shaped holder (21); a connection element (22) for the setting tool (10) arranged at an end of the holder (21), and an actuating switching device including an actuation element (24), a switching link (30) connecting an actuation element (24) to the actuation switch (13), and a safety device (40) for preventing actuation of the actuation switch (13) and having a gravity-controlled intermediate element (41) having an actuation position in which it is positioned between first controlling element (34) and second control element (35) of the switching link (30), and an interruption position (16) in which it interrupts the switching link (30).

Abstract: A positioning device for a hand-held setting tool (10) includes a holder (21), a support (22) for the setting tool (10) arranged at an end of the holder and fixedly connected with an elongate support element (23) extending parallel to the longitudinal axis (A) defined by the holder and having, at its end remote from the support, a base part, and a switching device for actuating the actuation switch (13) of the setting tool (10) and including an operating element for actuating the actuation switch (13), and an actuation element (24) arranged radially outwardly of the support element (23) and displaceable axially thereto and connectable with the operating element, with the base part extending beyond the end of the actuation element (24) remote from the support (22).

Abstract: The invention relates to an internal combustion engine with a fuel injection device with an injection nozzle having a nozzle needle and a plurality of injection bores. The injection nozzle is arranged to inject fuel into the combustion space in the form of a plurality of fuel jets as a main injection, as a post-injection and/or a preinjection. The injection bores of the injection nozzle are arranged in at least two different separately activatable rows of holes, an operating stroke of the nozzle needle being set by control unit as a function of a piston position and/or an operating point of the engine, and the rows of holes of the injection nozzle different injection-hole cone angles.

Abstract: The invention relates to an internal combustion engine with a fuel injection device with an injection nozzle having a nozzle needle and a plurality of injection bores. The injection nozzle is arranged to inject fuel into the combustion space in the form of a plurality of fuel jets as a main injection, as a post-injection and/or a preinjection. The injection bores of the injection nozzle are arranged in at least two different separately activatable rows of holes, an operating stroke of the nozzle needle being set by control unit as a function of a piston position and/or an operating point of the engine, and the rows of holes of the injection nozzle different injection-hole cone angles.

Abstract: A method is provided for operating an internal combustion piston engine, in which fuel is injected directly into a working chamber in the form of a pre-injection and main injection by means of an injection nozzle with a plurality of injection holes. The pre-injection takes place in a clocked manner. In order to minimize the moistening of the walls of the combustion chamber, a higher fuel pressure prevails in an injection device during the main injection than during the pre-injection. Furthermore, optimum homogenization of the pre-injected quantity of fuel is obtained by restricting the range of the injected fuel jets while simultaneously maximizing the atomization of the fuel particles and reinforcing the disintegration of the fuel jets during the clocked pre-injection.

Abstract: A method is provided for operating an internal combustion piston engine, in which fuel is injected directly into a working chamber in the form of a pre-injection and main injection by means of an injection nozzle with a plurality of injection holes. The pre-injection takes place in a clocked manner. In order to minimize the moistening of the walls of the combustion chamber, a higher fuel pressure prevails in an injection device during the main injection than during the pre-injection. Furthermore, optimum homogenization of the pre-injected quantity of fuel is obtained by restricting the range of the injected fuel jets while simultaneously maximizing the atomization of the fuel particles and reinforcing the disintegration of the fuel jets during the clocked pre-injection.

Abstract: A rotatable cutting tool having s support region (1) with an end surface (2) and a plurality of recesses (4) extending from the end surface (2) and in which, respectively, a plurality of cutting elements (5) are arranged, with each recess having a rigid stop surface (7) for a cutting element (5) and faces in a rotational direction (R) of the tool, and a gripping surface (8) facing in a direction opposite the tool rotational direction (R) and cooperating with the cutting element, with the gripping surface (8) being displaceable by a respective locking element in the direction opposite the tool rotational direction.

Abstract: A rotatable cutting tool having s support region (1) with an end surface (2) and a plurality of recesses (4) extending from the end surface (2) and in which, respectively, a plurality of cutting elements (5) are arranged, with each recess having a rigid stop surface (7) for a cutting element (5) and faces in a rotational direction (R) of the tool, and a gripping surface (8) facing in a direction opposite the tool rotational direction (R) and cooperating with the cutting element, with the gripping surface (8) being displaceable by a respective locking element in the direction opposite the tool rotational direction.

Abstract: A hand drill including a housing (2), a rotary drive (8-15) arranged in the housing (2) for driving a chuck (6) provided at a front, in the drilling direction, end of the housing and in which a drill or a chisel tool is received, a compressed air-operated hammer mechanism having a pneumatic cylinder (22), a die member (15) for imparting axial blows to the drill or chisel tool, and a percussion piston (30) displaceable in the pneumatic cylinder 922) upon being impinged by compressed air for intermittently applying axial blows to the die member (15), and a reversing valve for connecting the hammer mechanism (22) with a source of compressed air, integrated in the percussion piston (30), and having a plurality of recesses and bores (46-52) alternatively operationally connectable with at least one inlet opening (23) and at least one discharge opening (24) of the pneumatic cylinder (22) for feeding the compressed air into the pneumatic cylinder (22) and for discharging the compressed air therefrom.

Abstract: A spreading anchor including a sleeve (2) having an expansion region (3) provided with longitudinal slots (4), and an axial bore (5) having a conical shape in the expansion region (3) conically tapering toward a rear, with respect to a setting direction (5) end (6) of the sleeve (2), and a spreading member (8) having a conical profile at least along a portion of its longitudinal extent and displaceable in the axial bore (5) upon radial expansion of the sleeve expansion region (3), the spreading member (8) having a cylindrical through-bore (9) and being formed of tensioning segments (11-14) which extend in an axial direction and are held together with a possibility of a radial resilient expansion.

Abstract: A threading apparatus has a rotatable and axially movable driving part, a driven part which is axially displaceable relative to the driving part and adapted for driving a threading tool, a switchable form-locking coupling device including a switching member connected with the driven part and provided with coupling members and at least one coupling part driven by the driving part and having coupling elements. The driven part with the switching member and the at least one coupling part are axially relatively displaceable so that the at least one coupling part with the coupling elements is positionable with the coupling members in form-locking coupling engagement with the driven part or in a not driven intermediate position. The switching member is connected with the driven part in an axially not-displaceable manner and coupled form-lockingly in a circumferential direction and drives the driven part.