Abstract: A portable power tool comprises a housing (10), a motor, a handle (11), and a connection device for fixed connection of a terminal end of a flexible power supply line (16), wherein a support device (17) is mounted on the housing (10) for supporting the power supply line (16) at a support point (A) located at a certain distance from the terminal end (15) of the line (16), which support device (17) is swivelled relative to the housing (10) about a first axis (x--x) substantially coinciding with the longitudinal direction of the power supply line (16) at the terminal end (15) of the latter and about a second axis (y--y) extending perpendicularly to the first axis (x--x) as well as to the longitudinal direction of the power supply line (16) in the support point (A). Between its terminal end (15) and its support point (A), the power support line (16) is routed in a free loop (19) large enough to avoid a detrimental sharp bending thereof.

Abstract: A power nutrunner includes a planetary reduction gearing (12) and a torque limiting release clutch (13) disposed between a ring gear (25) of the reduction gearing (12) and the tool housing (11), wherein the ring gear (25) is tubular in shape and has an outer annular shoulder (41) at its one end carrying cam teeth (42) for cooperation with a spring biased thrust element (45) via balls (43) and cam surfaces (44). The thrust element (45) encircles the ring gear (25) and is biased by a pretensioned spring (53) which is backed by an adjustable support (52) including a rotatable screw element (70) connected to the housing (11) and provided with gear teeth (74) to be engaged by a setting tool (80) inserted through a front opening (79) in the housing (11).

Abstract: A power nutrunner has two consecutive planetary reduction gearings (12) and a torque limiting release clutch (13) disposed between a common ring gear (25) of the reduction gearings (12) and the tool housing (11). The ring gear (25) is tubular in shape and has an outer annular shoulder (41) at its one end carrying cam teeth (42) for cooperation with a spring biased thrust element (45) via balls (43) and cam surfaces (44). The thrust element (45) encircles the ring gear (25) and is rotationally locked relative to the housing (11) via a ball spline connection (47-49).

Abstract: A method for simultaneous tightening of two or more screw joints to a desired pretension condition by means of a nut running tool having two or more output spindles each having an adjustable output torque, wherein each one of the output spindles is individually operated according to at least one primary tightening parameter from among torque, angular position, time, clampload, and screw joint elongation. An instantaneous value of the at least one primary tightening parameter is continuously detected for each one of the output spindles, and the instantaneous tightening parameter value for each one of said output spindles is continuously compared with a corresponding instantaneous tightening parameter value of each other one of the output spindles.

Abstract: A process for fabricating a stator for an electric machine having a tubular unslotted ferromagnetic flux collector ring (16) and stator winding coils (18, 19, 20) with two legs which extend substantially axially along the inner cylindrical surface of the flux collector ring (16). Each winding coil leg is confined within an envelope (22) of a thin, flexible, non-conductive non-magnetizable material which is impregnated with and bonded to the next legs as well as to the flux collector ring (16) by a hot-setting resinous material.

Abstract: An electric power tool includes a power supply which is one of a replaceable battery unit, a rechargeable battery unit, and a cable connection for detachably connecting to a mains power supply. A code receiver is provided for receiving a code signal from a code signal emitting device via a contact free transmission. An electronic controller is arranged to switch the power tool to an operable mode when the power supply is coupled to the power tool and the code signal is received by the code signal receiver. The electronic controller is also arranged to switch the power tool to an inoperable mode when the power supply is uncoupled from the power tool and to maintain the power tool in the inoperable mode until the power supply is re-coupled to the power tool and the code signal is again received by the code signal receiver.

Abstract: A portable power tool for operating a wheel type working element comprises an output spindle (12) which is drivingly connected to a rotation motor (11) and which is provided with an automatic ball type balancing device (21) and a working implement mounting device (22), wherein the balancing device (21) comprises a peripheral wall (38) provided with a ball race (43), a transverse end wall (39) and a number of balls (41) freely movable along the ball race (43), and the peripheral wall (38) and the end wall (39) are formed in one piece with each other as well as with the output spindle (12).

Abstract: A pneumatic power tool includes a housing (10) with a pistol handle (11), a pneumatic motor provided in the housing (10), a pressure air inlet passage (13) and an exhaust air passage (14) extending substantially in parallel through the pistol handle (11), and a manually operable throttle valve (12) provided in the housing (10). The pistol handle (11) includes: (i) a tubular stem (20) rigidly secured to the housing (10) and forming a portion of the air inlet passage (13), (ii) a separate hollow grip element (30) surrounding at least partly the tubular stem (20) and defining together with the tubular stem (20) a portion of the exhaust air passage (14), and (iii) a clamping device (22-24,28,29) arranged to detachably secure the grip element (30) to the housing (10).

Abstract: A pneumatically or electrically powered power tool having a rotating working implement carrying output spindle (14), an exhaust or cooling air outlet passage (21), air outlet openings communicating the outlet air to the atmosphere and comprising a first section (22) located on one side of the tool housing (10, 20) and a second section (23) located on an other side of the housing (10, 20), and an air outlet flow directing valve (25) shiftable between a first condition in which it directs the air flow out through the first opening section (22) and a second condition in which it directs the air flow out through the second opening section (23). The air outlet flow directing valve (25) is shiftable by a maneouver mechanism (35, 36) including a rotatable annular handle (35) on the outside of the housing (10, 20) between the first and second conditions in which it alternatively directs the outlet air flow through the first and second outlet opening sections (22, 23).

Abstract: A pneumatic power wrench which comprises a rotation motor (11) lodged in a housing (10) having air inlet and outlet passages (16, 23) for communicating air to and from the motor (11), respectively, and a power transmission for connecting the motor (11) to an output shaft (14), wherein the air outlet passage (23) comprises an adjustable air flow restricting mechanism (24) in the form of a valve spindle (29) extending substantially longitudinally through the outlet passage (23), an annular valve seat (34), and a valve element (32) supported on the valve spindle (29) for flow restricting cooperation with the valve seat (34). The valve spindle (29) is axially adjustable relative to the valve seat (34) for varying the flow restriction through the outlet flow restricting mechanism (24).

Abstract: A cable connector for assembly and mounting on a front section of a housing of a power wrench is arranged to connect at least one operation parameter sensor of the power tool to a multi-core cable. The cable connector includes a multi-contact cable connector plug carried on the multi-core cable, and a one-piece mounting member which is made of an elastically resilient material and which is secured to the front section of the housing and supports a multi-contact jack. The multi-contact cable connector plug includes a coupling sleeve formed with an internal thread, and the mounting member includes an open ring portion to be mounted around the front section of the housing and a tubular coupling portion extending laterally from the ring portion.

Abstract: A portable power grinder for operating a wheel type of grinding tool, comprising an output spindle (12) drivingly connected to a rotation motor (11) and provided with a threaded coaxial bore (23) for receiving a grinding tool clamping screw (24) and with a radial support flange (25) for backing the grinding tool when clamped to the output spindle (12). An easily exchangeable tool support element (28) is sandwiched between the grinding tool and the support flange (25) and is provided with a coaxial through opening (30) for the clamping screw (24) and a forwardly directed tubular neck portion (27) for centering cooperation with a corresponding opening in the grinding tool.

Abstract: A suspension device for providing a universally movable support of a pneumatic power tool of the type having a housing (10) with a pistol grip handle (11), and comprises an arc-shaped yoke (31) with a slip member (38) movably guided thereon and connectable to an overhead balancing device. A first end (32) of the yoke (31) is connected to the tool housing (10) by a swivel connection (33, 35) at a location opposite the tool handle (11), and a second end (34) of the yoke (31) is rigidly secured to the rotatable inlet part (20) of a right angle air supply conduit swivel connection (17) to be mounted at the outer end of the tool handle (11), wherein the inlet part (20) of the swivel connection (17) is rotatable in a plane transverse to the longitudinal direction of the tool handle (11).

Abstract: A pneumatic power tool comprises a housing (10) with a pistol type handle (11), a motor located in the housing (10), a pressure air inlet passage (13) and an exhaust air passage (14) both extending through the handle (11) in substantially parallel with each other, and a manually operable throttle valve assembly (12) having two in sequence activatable valve elements (51, 53) for smooth starting and slow running of the motor, and a rotatable sleeve (40) for shifting between two positions corresponding to "forward" and "reverse" operation of the tool, respectively.

Abstract: A hydraulic torque impulse generator having a drive member (10) with a fluid chamber (12) and an output spindle (11) extending into the fluid chamber (12) and being provided with a movable seal element (19) and an axial seal ridge (22) for cooperation with oppositely disposed axial seal lands (13, 14) in the fluid chamber (12) to, thereby, divide the fluid chamber (12) into one high pressure compartment (H.P.) and one low pressure compartment (L.P.) during a limited angular interval of relative rotation between the drive member (10) and the output spindle (11), and a valve means comprising an elongate contact element (24, 44) which is supported in an axial groove (23, 43) in the seal ridge (22 ), which groove (23, 43) communicates with the high pressure compartment (H.P.) such that the contact element (24, 44) is urged into its sealing condition by the fluid pressure at pressure magnitudes above a certain level.

Abstract: A power screw driver for tightening self-tapping screws comprises a housing (10), a rotation motor, an output shaft (12), a torque limiting release clutch (11) having torque transferring cam unit (17, 19) and a spring biassed thrust element (20) exerting an engagement force on the cam unit (17, 19) and yielding axially to a release position as a desired output torque is reached. A screw bed (32) engaging contact member (31) coupled is to an activation unit (42) and is arranged to be axially displaced via the activation unit (42) of the activation means (42) a lock means (36, 39) from a thrust element (20) locking position during the thread forming phase of the tightening process to a thrust element (20) unlocking position during the final pretensioning phase.

Abstract: A portable power tool for operating a wheel type grinding or cutting working implement comprises a housing (10), a rotating output spindle (11) with a working implement supporting flange (14), a safety guard (16) adjustably supported on a guide flange (15) on the housing (10), and a selectively operable arresting device (18) for positively engaging lock openings (20) on the safety guard (16) for locking the latter in alternative positions relative to the housing (10), wherein the support flange (14) is provided with a number of peripheral indentations (21), and the arresting device (18) comprises a lock bolt (19) which is longitudinally shiftable between a first position in which it engages either one of the lock openings (20) on the safety guard (16), a second position in which it engages either one of the lock openings (20) on the safety guard (16) as well as either one of the support flange (14) indentations (21), and a third position in which it neither engages anyone of the safety guard (16) lock opening

Abstract: A multi-core cable (15) for communicating electric power and electrical signals to and from a hand held power nutrunner (10). Three longitudinal sections (16-18) are arranged in parallel with each other, and each has a geometric center (20-22) such that in any cross section of the cable (15) the geometric centers (20-22) are disposed on a straight line (24). A flex zone (A) is arranged adjacent the nutrunner (10) and has a preformed longitudinally twisted shape for obtaining a universal flexibility of the cable (15) and, thereby, a comfortable handling of the nutrunner (10).