Abstract: The present disclosure relates to a linear actuator including drive means for driving a movable component assembly for actuating a tool controlled by an electronic module. In exemplary embodiments, the module comprises acquisition means for acquiring a quantity that is representative of the instantaneous force supplied by the drive means and/or the time derivative of this variable, and the electronic module is capable of controlling interruption means for interrupting the operation of the drive means if the variable does not exceed a first predetermined value during a first predetermined time period from the start of the driving of the movable component assembly, and/or if the derivative does not exceed a second predetermined value during the first predetermined time period from the start of the driving of the movable component assembly.

Abstract: This device (4) for electrically connecting an electric power supply source (8) such as a battery to an electric appliance (2), is characterized in that it comprises: at least two conductive elements (16, 18) in tended for electrically connecting the electric power supply source (8) to the electric appliance (2), each conductive element (16, 18) defining an aperture (58, 60); a shell (10) capable of receiving the conductive elements, the shell comprising a first half-shell (12) and a second half-shell (14), the shell defining at least two slots (42, 44) capable of receiving the conductive elements and of maintaining said conductive elements substantially parallel to each other, the shell further comprising at least one locking member (46) capable of engaging into the apertures of the conductive elements and of maintaining said conductive elements engaged in said slots of the shell. Application to a linear actuator intended to receive a removable tool.

Abstract: The invention relates to a linear actuator (5) including drive means (10) for driving a movable component assembly (15) for actuating a tool (20), controlled by an electronic module (25), characterised in that the module (25) comprises acquisition means for acquiring a quantity that is representative of the instantaneous force supplied by the drive means (10) and/or the time derivative of this variable, and in that the electronic module (25) is capable of controlling interruption means for interrupting the operation of the drive means (10) if the said variable does not exceed a first predetermined value during a first predetermined time period from the start of the driving of the movable component assembly (15), and/or if the said derivative does not exceed a second predetermined value during the first predetermined time period from the start of the driving of the movable component assembly (15).

Abstract: A linear portable actuator including a direct current electric motor (2) rotationally driving a screw with the aid of a reduction element, wherein the motor (2) is controlled by an electronic module (5) comprising means (12) for the acquisition of instantaneous intensity of a supply current for the motor. Further, the electronic module (5) also comprises means (13) for calculating the differential coefficient in relation to supply-current intensity time, which are connected to means (14) for comparing the differential coefficient to a first predetermined value, and a comparing means controlling means (15) for switching off the supply current it the differential coefficient is greater than the first predetermined value.

Abstract: The present invention relates to the tool for working tubes. The tool includes a body having hinged thereto a trigger for moving back-and-fourth, and which is connected to a support member supporting a working head. A drive device is provided for driving the support member mounted on the body and connected to the trigger. The support member includes a toothed rack, and the drive device includes a first toothed gearwheel having a first module and meshing with the rack, a drive pawl serving to advance the rack forwards, and a retaining pawl preventing it from moving backwards. The drive device includes a second toothed gearwheel having a second module smaller than the first module, the second gear-wheel being secured to the first gearwheel, the drive pawl and the retaining pawl being engaged with the second gearwheel.

Abstract: A manual appliance for cutting pipes made of plastic, such as polyethylene, comprising a cutting blade mounted on a blade-holder moving under the action of a control screw between the two parallel branches of a guide saddle closed by means of a completely opening lower saddle.

Abstract: The invention relates to an on-site pipe-cutter assembly which is intended for manual sectioning of rigid, large-diameter pipes located in narrow trenches. The pipe-cutter assembly includes two yokes (1,2) which are connected at their associated ends by tie bars (3) and nuts (4), the yokes including cutter wheels (5) and ratchet sectors (9) arranged at the periphery of the yokes (1,2), the ratchet sectors being concentric with the cutter wheels (5) and a lever (12) having with a forked end which is equipped with two pawls, the pawls making it possible to obtain changes in the angular position of the lever by 10.degree. to 15.degree. or by a multiple of this angle.

Abstract: The present patent relates to chain pipe-cutters equipped to cut all kind of material. The chain pipe-cutters include: a tensioner which is a deformable system formed by a cylindrical rod fast with a support, a slider slidably mounted on said rod, said support bearing four articulated rockers connected to the slider in pairs by two links and having their lower ends shaped as hooks to permit attachment of the chain thereon; said cylindrical rod cooperating with a handle through the agency of a screw-thread and said handle being formed by two superimposed cylindrical elements and having four superimposed lobes arranged cruciform-fashion.

Abstract: Apparatus for rotating a cylindrical workpiece to be machined, having one or two automatic clamping devices on a rotatable hollow driven shaft into which the workpiece is inserted. Each clamping device has three chuck jaws mounted to swing into clamping engagement with the workpiece. Two pivots are provided for each jaw which swings about one or the other of them depending on the direction of rotation: the provision of two pivots gives a smaller and less cumbersome apparatus. To make the pivots swing into clamping engagement, a floating drag plate is freely rotatable on the shaft adjacent the clamping device. It is braked, to restrain rotation with the clamping device but it is positively linked to each jaw by a gudgeon pin, so that on rotation of the clamping device the braking restraint on the floating drag plate is transmitted to the jaws and urges them into clamping engagement with the workpiece.