Abstract: The invention relates to an actuator comprising a stationary structure and an actuating element that is movable relative to the stationary structure, a device for locking the actuating element in position which is mounted on the stationary structure and has a state for locking and a state for releasing the actuating element. The locking device comprises, successively, a stress limiter and at least one locking element so arranged as to be butting against one surface of the actuating element, in order to oppose a motion of the actuating element in a predetermined direction. The actuator comprises a member for controlling the locking device in the releasing state thereof and a member for resiliently returning the locking device to the locking state thereof.

Abstract: A drive power transmission device capable of transmitting drive power asynchronously with rotation of an input shaft. The drive power transmission device includes a first rotation shaft, a second rotation shaft, an elastic member, and a vibration element. One end of the elastic member is fixed to the second rotation shaft at a position spaced from its central axis, while the other end of the elastic member is fixed to the vibration element. The vibration element is capable of being placed in either one of a first state of being connected to the first rotation shaft and a second state of being disconnected from the first rotation shaft.

Abstract: An articulating surgical instrument is disclosed, and includes an end effector and a drive assembly operably coupled with the end effector. The end effector includes a first drive shaft defining a first axis, and a second drive shaft operably engaged with and extending away from the first drive shaft. The second drive shaft is operably coupled with the end effector and defines a second axis, the second axis different from the first axis. The first drive shaft and the second drive shaft are pivotably arranged such that the first drive shaft and the second drive shaft are configured to transition between a first, substantially straight arrangement and a second, substantially perpendicular arrangement.

Abstract: A fully power-shiftable double clutch transmission DCT of a drive train for a motor vehicle, in particular for a commercial vehicle having has a drive shaft on the drive side, an output shaft on the output side, and a double clutch which comprises at least two clutches with a main transmission assembly comprising at least two component transmissions. The clutches are connected in each case to an input shaft of a component transmission, the component transmissions, furthermore, preferably spur gears in four input gear planes and two output gear planes and a rear-mounted group. The double clutch transmission, furthermore, comprising a multiplicity of shifting elements, and the double clutch transmission and being of fully power-shiftable configuration with at least 12 gears by way of a suitable arrangement and configuration of the spur gear stages, consisting of movable gear and fixed gear, and the shifting elements.

Abstract: A dual clutch continuously variable transmission (“CVT”) includes an input member connected to an engine of the motor vehicle, an output member connected to a final drive unit, a first member, a second member, a third member, and a dual input assembly having a first element and a second element. The dual input member may be a dual clutch or a torque converter and clutch assembly. The dual clutch CVT also includes a fixed gear assembly having a first co-planar gear set selectively connectable to the first member and fixedly connected to the third member and a second co-planar gear set fixedly connected to the third member and fixedly connected to the output member. A continuously variable unit is connected directly to the second member and the third member. The output from the fixed gear unit may be connected to drive wheels separate from the continuously variable unit.

Abstract: A drive train device for a motor vehicle is disclosed. The drive train device has at least one component which is included for the purpose of transmitting a torque, and at least one cast-in element which is partially cast into the component, which is included for the purpose of transmitting the torque, where the component and the cast-in element are made of different materials. The drive train device has a sealing device which is included for the purpose of sealing a junction between the component and the cast-in element.

Abstract: A torque converter includes a torsional damper assembly. The torsional damper assembly includes a damper. The damper has an electromagnetic coil and a magnetorheological fluid. The electromagnetic coil is positioned such that a magnetic field from the electromagnetic coil adjusts a viscosity of the magnetorheological fluid when a current flows through the electromagnetic coil.

Abstract: A hydraulic system for a transmission device includes a primary pressure circuit and a secondary pressure circuit suppliable with hydraulic fluid from a defined saturation condition of the primary pressure circuit. A converter lock-up clutch is subjected to an operating pressure by a converter clutch valve. An inner torus chamber is suppliable with hydraulic fluid at a converter pressure of the secondary pressure circuit by a converter switching valve and by a valve device and a throttle device of the primary pressure circuit. The throttle device of the primary pressure circuit is downstream of the valve device of the primary pressure circuit.

Abstract: The invention provides a wave speed reducer having a self-locking function comprising a structure for outputting driving rotation of a bearing member or a spline wheel at a specific reduction ratio which drives rollers to rotate by a cam. A designed convex arc of the cam has self-locking function of restricting the rollers to reversely rotate so as to form a compound type reducer device having a multi-reducer function by mutually combining the wave speed reducer and a planetary gear set. To solve conventional problems, poor driving accuracy at tiny rotation angle and scarcity of self-locking function for conventional reducers are improved.

Abstract: A flat strain wave gearing (1) has a mechanism for preventing a flexible externally toothed gear (4) from moving in the direction of the device center axis (1a) with respect to a rigid internally toothed gears (2, 3). The mechanism has an inner-peripheral groove (11) formed on inner teeth (3a) of the internally toothed gear (3), an outer-peripheral groove (12) formed on outer teeth (4a) of the externally toothed gear (4), and a flexible ring (13) mounted between the inner-peripheral groove (11) and the outer-peripheral groove (12). The ring (13) is engageable with groove inner-peripheral surfaces (11a, 11b, 12a, 12b), from the direction of the device center axis (1a), at meshing positions of the both gears (2, 4).

Abstract: A gear box includes a gear box body for accommodating a gear, multiple shaft holes which are formed on a side wall portion of the gear box body to support a shaft, a fixing portion which is provided in the gear box body and on which a fixing member for installing the gear box body on an installation surface parallel to the shaft is mounted, and an output hole reinforcement rib which is formed on the side wall portion and extends from a peripheral edge portion of an output shaft hole for supporting an output shaft among the multiple shaft holes toward the fixing portion.

Abstract: A mechanism housing (140) for an adjustment mechanism (100) for a vehicle seat includes a first housing part (150) and a second housing part (160). A first cylinder segment (155) of the first housing part (150) and a second cylinder segment (165) of the second housing part (160) join as a pair to form a cylinder portion (170) through which a spindle (4) extending along an axis (A) can be passed. In the radial direction relative to the axis (A), facing away from each other, the two housing parts (150, 160) are held together by two spring clips (180).

Abstract: A transaxle case with an overhanging portion that overhangs outward relative to a vertical line (a tangential line) that extends upward from a 90-degree rotated portion at a location rotated from the vertically lower portion of a differential ring gear by 90 degrees, and an extending rib that extends from the overhanging portion toward the center of rotation of the differential ring gear to the vicinity of the outer periphery of the differential ring gear, and the overhanging portion and the extending rib constitute a splattering space. The lower surface of the extending rib is formed as an inclined surface such that working oil is pushed toward a converter housing when working oil splattered to the splattering space collides against the lower surface. Consequently, working oil is caused to be splattered to the splattering space, collides against the lower surface of the extending rib, and pushed toward the converter housing.

Abstract: A differential ring gear is a helical gear disposed so as to rake up working oil in a differential chamber obliquely toward a working oil storage chamber 65 when the differential ring gear is rotated in the main rotational direction. A ring gear covering portion of a reservoir plate that separates the differential chamber and the working oil storage chamber from each other is provided with first and second guide portions along upper edge portions of first and second opening portions configured to discharge the working oil raked up by the differential ring gear. Lower surfaces of the first and second guide portions are formed to be inclined upward toward the working oil storage chamber.

Abstract: A planetary roller power transmission device includes: a stationary ring; a sun shaft; planetary rollers provided between the stationary ring and the sun shaft so as to be pressed against them; a carrier that supports the planetary rollers so that the planetary rollers are rotatable and that rotates in conjunction with revolution of the planetary rollers; and a disk-shaped support plate supporting an oil-containing member that can be in contact with a peripheral surface of each planetary roller. Axial free movement of the support plate is restricted by the planetary rollers and the sun shaft or a member that is integrated with the sun shaft so as to be integrally rotatable. The support plate is structured so as to be rotatable relatively to the sun shaft in conjunction with rotation of the sun shaft due to contact with the sun shaft or the member.

Abstract: A planetary gear assembly comprising: a housing, which contains: a planetary carrier, a sun gear, at least one planetary gear, a ring gear, a coil spring; an input shaft; and an output shaft. The coil spring extends around at least a portion of the planetary carrier. The coil spring includes a first tang in communication with the ring gear and a second tang in communication with the housing. When torque is applied to the input shaft, the planetary carrier rotates within the coil spring in one or more driving directions so that torque is transferred to the output shaft. When no torque is applied to the input shaft and torque is applied to the output shaft, the coil spring constricts and provides sufficient contact force to the planetary carrier and housing to prevent the planetary carrier from moving relative to the housing in at least one of the driving directions.

Abstract: The disclosure provides a device for adjusting a movement of an operating element for an automatic transmission of a vehicle. The device comprises a rotatable shaft and a bearing apparatus for the supporting of the operating element. At the same time, by means of the operating element, the bearing apparatus can be moved with the operating element in relation to the shaft toward a first movement axis and between a resting position and a deflecting position toward a second movement axis. The device is characterized by a blocking element for blocking a movement of the bearing apparatus from the resting position to the deflecting position. An actuating element for actuating the blocking element and a resetting element for resetting the bearing apparatus from the deflecting position to the position are arranged on the shaft.

Abstract: A multi-directional operating device includes an operating member, a support body, movable members, a pair of movable magnetic members, a facing magnetic member, stopper portions, a drive member, and a cam member. One of the drive member and the cam member has a guide surface having a first projection, and another of the drive member and the cam member has a sliding surface having a second projection. When the operating member is inclined in a first direction, one of the movable magnetic members is inclined, and inclination of another movable magnetic member is stopped by one of the stopper portions. When the operating member is inclined in a second direction, the first projection and the second projection are moved beyond projecting portions of each other and slide on each other. This multi-directional operating device is preferably applied to a vehicle shift apparatus.

Abstract: A hydraulic circuit for a transmission including a main pump and a sub pump is provided in which when the main pump and the sub pump are driven by an engine after it has been stopped for a long time, due to the internal pressure of a torque converter being low, a sufficient hydraulic pressure cannot be transmitted to a feedback port of a switching valve via a fifth oil passage; communication between a first port and a second port of the switching valve is cut off, and the oil discharged by the sub pump is therefore not supplied to a lubrication system via a sixth oil passage but is supplied via the path: second oil passage?first port of switching valve?fourth oil passage?first port and second port of second pressure regulating valve?torque converter.

Abstract: A method is disclosed for controlling a park mode in a motor vehicle that includes a powertrain with a powerplant. The method includes identifying whether the vehicle is stopped. The method also includes identifying whether the powerplant is operating or is turned off. The method additionally includes identifying whether an operator of the vehicle is present inside or has vacated the vehicle. The method also includes commanding automatic selection of the park mode if the powerplant is turned off. Furthermore, the method includes commanding automatic selection of the park mode if the operator has vacated the vehicle, whether the powerplant is turned on and operating, or is turned off. The powertrain may include an automatic transmission operatively connected to the powerplant, and the park mode can be affected inside the transmission. A system for controlling such a powertrain via a controller programmed to execute the method is also disclosed.

Abstract: A vehicle system includes: a shift operation device including an operator, the operator being configured to be returned to an initial position when not operated by a driver, the operator being configured to be operated by the driver to an operation position corresponding to a shift position of an automatic transmission; a change mechanism configured to change the shift position by activating an actuator; and an electronic control unit configured to set a first required position on the basis of the initial position and the operation position, electrically change the shift position on the basis of the required position, hold the required position as a second required position until a new required position is set on the basis of the operation position, and, by comparing the second required position with the shift position, determine whether the vehicle system is abnormal.

Abstract: A system includes a continuously variable transmission having a primary pulley assembly configured to receive power and a primary oil chamber coupled to the primary pulley assembly such that a pressure of oil within the primary oil chamber is applied to the primary pulley assembly. The continuously variable transmission also includes a secondary pulley assembly and a drive belt configured to transfer power from the primary pulley assembly to the secondary pulley assembly. The system also includes a pressure sensor coupled to the primary oil chamber and configured to detect a pressure of the oil within the primary oil chamber. The system also includes an electronic control unit coupled to the pressure sensor and configured to determine whether the continuously variable transmission is set to the maximum gear ratio based on the detected pressure of the oil within the primary oil chamber.

Abstract: Methods and systems are disclosed for reducing engine flywheel power reduction of an engine while protecting a drivetrain. The method includes monitoring transmission gear selection; determining reduction in flywheel power to protect the drivetrain; and monitoring engine power consumption by other engine power loads. When other engine power loads consume less power than the reduction in flywheel power to protect the drivetrain, the method includes reducing flywheel power by the power difference. When other engine power loads consume the same or more power than the reduction in flywheel power to protect the drivetrain, the method includes not reducing the flywheel power. Engine power can be consumed by both on-vehicle and off-vehicle power loads. Engine power can be consumed by an electric generator and/or a plurality of inverters, and their power consumption can be monitored. Information and commands can be communicated over a controller area network (CAN) bus.

Abstract: A piston device for a piston cylinder unit comprises a rod and a piston which is secured by means of plastic forming onto the rod.

Abstract: A piston assembly includes a piston cross-member having a first end disposed opposite a second end. The piston assembly also includes a first cap disposed on the first end of the piston cross-member, and a second cap disposed on the second end of the piston cross-member. A slot is formed in the piston cross-member transverse to a length of the piston cross-member. An insert is disposed in the slot, wherein the insert is a wear article configured to contact a crank.

Abstract: A five-spindle engine system having a stable center of gravity that operates without oil lubrication. an opposed-piston four-cylinder, two-stroke combustion engine, a double-acting opposed-piston pressure-gradient drive, a multi-rotor/multi-stator/multi-phase disk generator/disk motor including windings printed on printed circuit boards, and/or a heat pump may be integrated in the systemt and housed in a common sealed housing.

Abstract: A piston ring for a piston, the piston ring having a circumferential surface configured to engage an inner surface of a cylinder, the inner surface having at least one recess indented into the inner surface, the engagement of the circumferential surface of the piston ring with the inner surface of the cylinder defining a contact zone therebetween, wherein the circumferential surface of the piston ring is configured such that the ratio of the dimension of the contact zone the direction of travel of the piston to the dimension of the recess in the direction of travel of the piston is in the range of approximately 5:1 to 5:3.

Abstract: A bearing interface of an apparatus, the apparatus having a first element and a second element configured to move relative to each other during operation of the apparatus, the first element comprising a first bearing surface configured to engage at least a portion of a second bearing surface of the second element thereby defining a contact zone between the first bearing surface and the second bearing surface, the first bearing surface having at least one recess indented into the first bearing surface, wherein the dimension of the recess in the direction of movement of the second element relative to the first element is less than the dimension of the contact zone in the direction of movement of the second element.

Abstract: A piston ring for a piston, the piston ring having a circumferential surface configured to engage an inner surface of a cylinder, the inner surface having at least one recess indented into the inner surface, the engagement of the circumferential surface of the piston ring with the inner surface of the cylinder defining a contact zone therebetween, wherein the circumferential surface of the piston ring is configured such that the ratio of the dimension of the contact zone the direction of travel of the piston to the dimension of the recess in the direction of travel of the piston is in the range of approximately 5:1 to 5:3.

Abstract: A machine having one or more cylinders, each cylinder having an inner surface configured to engage a circumferential surface of a piston ring of a piston thereby defining a contact zone between the inner surface of the cylinder and the circumferential surface of the piston ring, the inner surface having at least one recess indented into the inner surface, wherein the ratio of the dimension of the recess in the direction of travel of the piston to the dimension of the contact zone in the direction of travel of the piston is in the range of approximately 1:5 to 3:5.

Abstract: Provided is a sealing device capable of suppressing leakage of a fluid to be sealed while reducing rotary torque regardless of rotational direction. In a sealing ring (100) slides against a side wall surface on a low pressure side of an annular groove, a dynamic pressure generating groove (120) that includes a first groove (121) having a constant width in a radial direction and extending in a circumferential direction and a second groove (122) extending from a center position of the first groove (121) in the circumferential direction to an inner circumferential surface and guiding a fluid to be sealed into the first groove (121) is provided on a sliding surface side which slides against the side wall surface. The first groove (121) is provided at a position within a sliding region in which the sealing ring slides against the side wall surface.

Abstract: A control plate for effecting superior shut-off in a proportional control valve comprises a moveable disk-shaped element that has a flat surface, generally perpendicular to the valve axis of symmetry when closed, and translates toward or away from an orifice surrounded by a narrow lip or orifice ridge. Enhanced leak tightness in the valve shut-off condition is achieved by selectively incorporating into the control plate materials that are softer than the material comprising the orifice ridge.

Abstract: The present invention provides a gate valve assembly having a valve body with a channel extending from a distal end to a proximal end, a gate configured to be moved from a first position to a second position, the second position being when the gate is positioned in the channel of the valve body between the distal end and the proximal end of the valve body. A seat insert is also provided to be threaded into a pocked of the valve body and a seat is configured to be positioned within the seat insert. A seal is adapted within a groove of the seat insert positioned between the valve body and the seat insert, wherein the seal is a fixed static seal providing no gaps and/or spaces between the seal insert and the valve body allowing no debris to corrupt the seals.

Abstract: A valve rod (12) for a vacuum valve, the plunger having a first connection region (40) for a closure member (5) of the vacuum valve and at least one second connection region (41) for a valve drive of the vacuum valve. At least some sections of the valve rod (12) have a material (42) with an elastic modulus of at least 250 gigapascal, preferably at least 350 gigapascal.

Abstract: A screen valve (210) to control fluid flow comprising at least one multi-apertured valve plate (220) movable laterally relative to a multi-apertured valve seat (230) between a closed configuration whereby the apertures are not registered to prevent fluid flow, and an open configuration whereby the apertures are registered to permit fluid flow, wherein the valve plate is supported by a multi-apertured carrier plate (240) that moves laterally in synchrony with the valve plate (220) to maintain a predetermined lateral registration between their respective apertures as the valve plate moves between the open and closed configurations, the valve plate being movable relative to the carrier plate so as to be able to lift off and return into contact with the valve seat. The co-moving carrier plate shields the valve plate so as to minimise pressure locking. Aerodynamic features may be incorporated to urge the valve plate (220) towards or away from the carrier plate (240).

Abstract: A valve device includes: a ball valve having a ball face shaped in a convex spherical surface; and a valve seat having a seat face shaped in a concave spherical surface. The seat face is pressed onto the ball face. The ball valve is rotated to open a valve by communicating a valve opening defined in the ball valve and a seat opening defined in the valve seat with each other, and to close the valve by stop the communication. A diameter of the seat opening ?2 is smaller than a diameter of the valve opening ?1. A curvature radius of the ball face R1 is smaller than or equal to a curvature radius of the seat face is R2.

Abstract: A clamp for flexible tubing such as medical tubing or micro-tubing. The clamp comprises a clam-shell design having lateral non-opposing sidewalls that prevent the micro-tubing from bending out from under the mating clamping anvils when closed. The lateral non-opposing sidewalls of the clamp are non-opposing in order to facilitate injection molded in two halves of an injection mold without the use of additional slides.

Abstract: A valve body (12) of a pneumatic valve (10) includes a transversal compartment (20) for a shaft or spool (50) accessible according to an insertion direction (IN) for the insertion of annular gaskets (32a, 32b) for the seal with the shaft (50). The transversal compartment (20) has a downward support surface (30a) for a downward gasket (32a), and an upward support surface (30b) for an upward gasket (32b). The diameter of the upward support surface (30b) is greater than the diameter of the downward support surface (30a) for a convenient insertion of the downward gasket (32a).

Abstract: A modular sleeve valve apparatus can include a valve body including a first port and a second port on a first and second sidewall of the valve body. The apparatus can include a first and second valve core sleeved within the valve body. The first valve core can be a cylinder including a first aperture in a cylindrical sidewall and a second aperture in a top base-wall. The second valve core can be a cylinder including a third aperture in a cylindrical sidewall and a fourth aperture in a bottom base-wall. The first and second valve cores can be removable from the valve body and radially rotatable within the valve body. The second valve core can be positioned stacked upon the first valve core to align the second aperture and the fourth aperture.

Abstract: A one way valve is revealed. The one way valve includes a valve seat and a valve member supported by the valve seat. A hole is mounted at a center of the valve base while an outer circular base is disposed around the hole and an inner circular base is arranged at a center of the hole. The inner circular base has a circular sidewall around an opening. At least one gap is radially formed on the circular sidewall and the gap is vertically penetrating the circular sidewall. The valve member consists of a membrane portion and a rod portion extended from one side of the membrane portion. Thereby the rod portion is passed through the gap of the inner circular base to be set into the opening of the inner circular base.

Abstract: A flow limiting device with a back flow prevention mechanism includes a body that has an isolation board and a water-through cavity. The isolation board has a water-through hole connecting to the water-through cavity and a flow limiting device having a flow limiting component and stop ribs which limit the position change of the flow limiting component. The stop ribs are arranged on the inner wall of the water-through cavity at equal intervals. The flow limiting component is set in the water-through cavity. The outer side of the flow limiting component is contacted on the stop ribs. A back flow prevention mechanism comprises, a back flow prevention component which is fixed in the water-through hole and a supporting structure which is set for supporting the back flow prevention component when it expands on the inner wall of the water-through cavity.

Abstract: A relief valve comprises a ball body separated from a seat member when a pressure of a working oil from a supply passage exceeds a set pressure, and a ball-body support member biased by a biasing member and supporting the ball body. The ball-body support member comprises a holding recess portion for holding the ball body and a taper portion formed around the holding recess portion and inclined so as to become deeper toward the holding recess portion.

Abstract: A valve assembly includes a valve housing having an internal generally cup-shaped bore, a valve control cartridge inserted into the bore and having a rotatable control stem extending upwardly therefrom, and a bonnet nut having a through-bore. The bonnet nut is threaded to the valve housing such that the control stem extends through the through-bore. Flexible fingers are provided along the through-bore to control a level of resistance to a rotation of the rotatable control stem. The stem is positioned to frictionally engage the flexible fingers as the stem is rotated.

Abstract: A rigid piston assembly for use in a conventional flush valve includes a rigid piston configured to fixedly engage within the valve body. The present invention is also directed to a flush valve for a plumbing fixture as well as a method of retrofitting a rigid piston into a diaphragm flush valve body.

Abstract: A rigid piston assembly for use in a conventional flush valve includes a rigid piston and a solenoid configured to fixedly engage within the valve body. A flush valve for a plumbing fixture as well as a method of retrofitting a piston valve into a diaphragm flush valve body which includes a rigid piston and solenoid configuration.

Abstract: A control system for controlling a drive motor operating a discharge valve installed in a conduit on a firefighting vehicle. The system includes a pressure sensor configured to measure a pressure of liquids flowing through the conduit, a flow sensor configured to measure a flow rate of liquids flowing through the conduit, a variable control switch operable to generate a variable control signal in response to manual activation, and a microcontroller operable to receive the pressure and flow rate, and generate a variable non-linear control signal operable to cause the drive motor to change the position of the discharge valve at a variable non-linear speed directly proportional to a distance of a current setting from a desired setting.

Abstract: A system for automatically filling a fuel tank coupled to a fracking pump is described. The filling system includes a device that automatically opens and closes fuel flow to the fuel tank based on a level of fuel in the fuel tank. The device may close fuel flow to the fuel tank when a fill capacity of the fuel tank is reached. The device may open fuel flow to the fuel tank when a fuel level in the fuel tank drops below a selected level (e.g., below 1/4 of the fill capacity of the fuel tank). The device may be used to substantially continuously supply fuel to the fuel tank.

Abstract: To provide a regulating valve of which stability of an operation is high, a regulating valve is disclosed that includes a valve box in which a first flow channel and a second flow channel are formed; a cage having a first throttle portion provided in a boundary between the first flow channel and the second flow channel; a plug head having a second throttle portion slidably inserted into an inside of the cage; and a guide ring slidably holding a plug guide holding the plug head. In a closed state of the regulating valve, a distance between a through-hole of the first throttle portion and an end portion of the plug head on the other end side is equal to a distance between a through-hole of the second throttle portion and an end portion of the cage on the opened one end side.

Abstract: To provide a regulating valve whose stability of an operation is high,a regulating valve is disclosed that includes a valve box in which a first flow channel and a second flow channel are formed, a cage having a first throttle portion provided in a boundary between the first flow channel and the second flow channel, a plug head having a second throttle portion slidably inserted into an inside of the cage, and a guide ring slidably holding a plug guide holding the plug head. In a closed state of the regulating valve, a distance between a through-hole of the first throttle portion and an end portion of the plug head on the other end side is shorter than a distance between a through-hole of the second throttle portion and an end portion of the cage on the opened one end side.

Abstract: A pipe laying machine for laying a pipe in a trench, includes a first self-propelled chassis (10) on which a driver's cab (11) and powertrain (12) are located, a beam (20) connected at a first end (20a) to the chassis and which extends laterally therefrom, a second moving chassis (30) connected at a second end (20b) of the beam and a guiding and supporting element (40) of a pipe, sliding on the beam toward and away from the self-propelled chassis, in which the self-propelled chassis can travel on a track (P) at the edge of the trench, the moving chassis (30) can travel on the bottom of the trench, and the guiding and supporting element can translate to carry the pipe to the trench so that by moving the machine forward along a direction of forward movement the cantilevered portion of pipe is laid on the bottom of the trench.