Abstract: A power tool system includes a portable power tool (10), a stationary control unit (11), and a cable assembly (12), which includes a multi-core cable 15 and connection pieces (13, 14), for communicating power and/or signals between the power tool (10) and the control unit (11). The cable assembly (12) is provided with an electronic memory module in the form a data chip (16) for storing data relating to the identity and operation characteristics of the cable assembly (12) as well as data concerning the compatibility of the power tool (10), the control unit (11) and the cable assembly (12). The data chip is arranged to register and accumulate the number power tool operations performed via the cable assembly (12) and to indicate when a predetermined limit for power tool operations as regards mechanical wear of the cable assembly (12) is reached.

Abstract: A pneumatic impact tool comprises a housing having pressure air supply passage, and an impact mechanism movably supported in the housing and having a front opening for receiving a working implement and a hammer piston for delivering hammer blows to the working implement. The impact mechanism is supported in the housing by a pivot device in a point located between the forward and rear ends of the impact mechanism and allowing longitudinal and pivotal movements but preventing in the support point radial and rotational movements of the impact mechanism relative to the housing. A resilient membrane is located at a distance from the pivot device and is arranged to bias the impact mechanism to a neutral position relative to the housing while absorbing longitudinal as well as radial vibration movements of the impact mechanism. The membrane has at least one air feed passage connecting the air supply passage to the impact mechanism.

Abstract: A power tool having a rotation motor coupled to an output shaft (11) via a reduction gearing (13,14), wherein the reduction gearing (13,14) comprises at least one planetary gearing (14) with a sun gear (30), a ring gear (22), a planet wheel carrier (32) supporting two or more planet wheel units (35) each comprising two axially spaced spur gears (36,37) both secured to a spindle (38) which is rotatively journalled relative to the planet wheel carrier (32) via a bearing located between the spur gears (36,37).

Abstract: A pneumatic high speed motor includes a stator housing, a rotor journalled in the stator housing, and a pressure air inlet passage. A speed governor for the motor includes a valve element that is shiftable between an open position and a closed position for controlling pressure air flow through the pressure air inlet passage, and a spring which continuously biases the valve element toward open position. An air compressor is driven by the rotor to deliver an output pressure, which is responsive to a speed of the rotor, to an activating surface of the valve element. The activating surface of the valve element is acted upon by the output pressure of the air compressor to shift the valve element toward the closed position against the bias force of the spring at rotor speed levels exceeding a desired operating speed level.

Abstract: A portable power grinder has a housing, a rotating output shaft with a grinding wheel mounting device, a grinding wheel safety guard adjustable between angular positions defined by apertures in the safety guard, and a manually operable safety guard arresting device engageable with an aperture. The arresting device has a lock slide movable on the housing and operable by an articulated lever connected at one end to the housing and at another end to the lock slide and being shifted by folding and unfolding, thereby moving the lock slide between a safety guard arresting position and a safety guard releasing position and locking the lock slide in the arresting position. The lock slide includes a spring exerting a force onto the safety guard in the arrested position. A lock spindle displaceably supported on the lock slide moves between a retracted safety guard locking position and an advanced position to lock the output shaft.

Abstract: A connector plug intended for a multi-conductor cable (12) with a set o power conductors (30) and set of signal conductors (31) and comprising a casing (10) with a rear cable receiving opening (11), a number of contact elements (42, 43) connected to the power and signal conductors (30, 31) and arranged to engage contact elements on a connectable matching connector plug or jack, and a transition chamber (17) located between the rear cable receiving opening (11) and the contact elements (42, 43) and arranged to be penetrated by the power and signal conductors (30, 31), wherein a coiling core element (18, 118) is mounted in the transition chamber (17) to form separate routing paths (40, 41) for the power conductors (30) and the signal conductors (31) such that added lengths and slacks are provided in the conductors (30, 31) for absorbing length changes therein due to bending of the cable (12).

Abstract: A power tool comprises a housing (10) with a cylindrical outer surface (11), a rotation motor, and a power train including a reverse gearing (14, 24) with a first planetary gearing (14) for “forward” operation and a second planetary gearing (24) for “reverse” operation, and a ring gear mechanism (19, 26, 40) for establishing a reaction torque support relative to the housing (10) by coupling either one of the first planetary gearing (14) and the second planetary gearing (24) to the housing (10) to thereby shift the power transmission from a “forward” operation mode to a “reverse” operation mode, wherein the gear ring mechanism comprises a separate rotatable ring gear (19, 26) for each planetary gearing (14, 24) and an axially displaceable coupling ring (40) for alternative engagement with the ring gears (19, 26).

Abstract: A power tool system comprises a portable power tool (10), a stationery control unit (11), and a multi-core cable (12) for communicating power and/or signals between the power tool (10) and the control unit (11), wherein the cable (12) is provided with an electronic memory module in the form a data chip for storing data relating to the identity and operation characteristics of the cable (12) as well as data concerning the compatibility of the power tool (10), the control unit (11) and the cable (12), wherein the data chip is arranged to register and accumulate the number power tool operations performed via the cable (12) and indicate when a predetermined limit for power tool operations as regards mechanical wear of the cable (12) is reached.

Abstract: A portable power tool is provided which includes a rotation motor (11), an output shaft (14), a gearing (13) and a drive spindle (12; 112) connecting the gearing (13) to the motor (11). A drive line arresting lock device (17; 117) is provided to facilitate loosening and/or tightening of a working implement mounting device (15), and a releasable safety clutch (23; 123) is provided between the lock device (17; 117) and the gearing (13) for protecting the gearing (13) against transmission of detrimental excessive torque magnitudes manually applied on the output shaft/mounting device (14, 15).

Abstract: A pneumatic power tool comprises a housing (10), a motor, a pressure air inlet passage (11,15), an exhaust air outlet passage (12,17), and an exhaust air outlet flow deflector (14) including an outlet piece (20) with radial as well as axial outlet openings (25, 26) and a valve element (21) with radial as well as axial apertures (30, 28), wherein the outlet piece (20) and the valve element (21) are rotatable relative to the housing (10) as well as to each other to bring alternatively a radial opening (25) of the outlet piece (20) into or out of alignment with a radial aperture (30) of the valve element (21), and at the same time bring the axial apertures (28) of the valve element (21) out of or into alignment with the openings (26) of the outlet piece (20), thereby shifting the exhaust outlet flow direction as desired between a radial direction and an axial direction.

Abstract: A pneumatic power nut runner with a rotation motor which is connected to a drive train including a torque responsive release clutch (10) and a disengageable torque non-responsive clutch (11), a pressure air inlet valve (12), and an activation mechanism (49, 50) for automatic power shut-off at the attainment of a desired maximum torque level. The activation mechanism (49, 50) comprises a transversely displaceable latch element (49) provided with a blind bore (54) for permitting closure of the inlet valve (12) and a depression (55) for allowing engagement of the torque non-responsive clutch (11), wherein a transverse displacement of the latch element (49) at the attainment of the desired torque level results in a freeing of the inlet valve (12) for displacement toward closed position and a forcing of the torque non-responsive clutch (11) out of engagement.

Abstract: A throttle valve device for a pneumatic power tool comprises a casing (10) with an air inlet passage (11), an air outlet passage (12), a valve chamber (13) with a main valve seat (14) and a main valve element (15), and a manually shiftable activating rod (21) which is sealingly guided in a lateral guide way (19) and arranged to engage and displace the main valve element (15) off the main seat (14), wherein the activating rod (21) has a valve portion (27,28) for co-operation with a secondary valve seat (24) in the guide way (19) for controlling a bypass passage (23,24,29) extending between the inlet passage (11) and the outlet passage (12) such that the activation rod valve portion (27,28) is separated from the secondary valve seat (24) and opens up the bypass passage (23,24,29) before the activation rod (21) engages and displaces the main valve element (15) off the main seat (14) when operating the activation rod (21) in the opening direction.

Abstract: A connector plug intended for a multi-conductor cable (12) with a set o power conductors (30) and set of signal conductors (31) and comprising a casing (10) with a rear cable receiving opening (11), a number of contact elements (42, 43) connected to the power and signal conductors (30, 31) and arranged to engage contact elements on a connectable matching connector plug or jack, and a transition chamber (17) located between the rear cable receiving opening (11) and the contact elements (42, 43) and arranged to be penetrated by the power and signal conductors (30, 31), wherein a coiling core element (18, 118) is mounted in the transition chamber (17) to form separate routing paths (40, 41) for the power conductors (30) and the signal conductors (31) such that added lengths and slacks are provided in the conductors (30, 31) for absorbing length changes therein due to bending of the cable (12).

Abstract: A pneumatic high speed motor comprises a stator housing (10,26), a rotor (20) journalled in the stator housing (10,26), a pressure air inlet passage (33,34), a speed governor valve (28-31) shiftable between an open position and a closed position for controlling the pressure air flow through the pressure air inlet passage (33,34), and a spring (38) arranged to continuously bias the speed governor valve (28-31) in the direction of the open position, wherein an air compressor (46) is driven by the rotor (20) and delivers a speed responsive output pressure, the speed governor valve (28-31) includes a valve element (29) with an activating surface (44) acted upon by the output pressure of the air compressor (46), thereby accomplishing a shifting of the speed governor valve (28-31) in the direction of the closed position against the bias force of the spring (38) at rotor speed levels exceeding a desired operating speed level.

Abstract: A pneumatic power tool comprises a housing (10, 11) with a motor and a pressure air inlet passage (12) and an exhaust air outlet passage (16) both extending through the housing (10, 11) and communicating with the motor, wherein the outlet passage (16) is provided with sound attenuating elements (36, 37) formed in a highly porous resinous material and arranged to be penetrated by the exhaust flow for exhaust noise reduction, and an exhaust flow diverting deflector (17) mounted at the outlet end of the outlet passage (16) and comprising a shell like body (18) with a cylindrical neck portion (19) rotatively received in the outlet passage (16), a concave flow guiding surface (28), and two parallel inner walls (30a, b) forming between them a main flow passage (31) and between them and the shell body (18) two narrow secondary flow passages (32a, b) for accomplishing noise dampening low velocity air flow shields on both sides of the main flow.

Abstract: A pneumatic power nut runner with a rotation motor which is connected to a drive train including a torque responsive release clutch (10) and a disengageable torque non-responsive clutch (11), a pressure air inlet valve (12), and an activation mechanism (49, 50) for automatic power shut-off at the attainment of a desired maximum torque level. The activation mechanism (49, 50) comprises a transversely displaceable latch element (49) provided with a blind bore (54) for permitting closure of the inlet valve (12) and a depression (55) for allowing engagement of the torque non-responsive clutch (11), wherein a transverse displacement of the latch element (49) at the attainment of the desired torque level results in a freeing of the inlet valve (12) for displacement toward closed position and a forcing of the torque non-responsive clutch (11) out of engagement.

Abstract: A speed governor for a pneumatic rotation motor having a pressure air inlet passage (15, 15?), an inlet valve (16; 56) including a flow controlling valve element (18; 58) located in the inlet passage (15, 15?), and a speed responsive activating device (24; 54) operatively connected to the inlet valve (16; 56), wherein the activating device (24, 54) comprises a pilot circuit with an activating surface (20; 70) on the valve element (18; 58), a restricted air supply opening (21, 72) communicating with the activating surface (20; 70), a bleed-off valve (24; 54) which communicates with the activating surface (20; 70) and which comprises an electromagnet actuator (27; 76), and a generator (30) driven by the motor and delivering to the actuator (27; 76) a voltage of a magnitude responsive to the actual motor speed to thereby make the bleed-off valve (24; 54) operate in response to the output voltage of the generator (30) and the actual motor speed.