Abstract: A linear electric actuator system, preferably for patient lifters, comprising at least one linear electric actuator and a controller having a power limiting circuit for limiting the power to the at least one linear electric actuator. The actuator system is arranged such that the threshold value of the maximum permissible power in the power limiting circuit may be changed, and that this change may be performed via reference to the position of the spindle nut on the spindle as a look up in a table showing a corresponding value for the power limit.

Abstract: An object of the present invention is to provide an actuator capable of reducing a shock in acceleration at the time of a turn caused by a load in a lateral direction orthogonal to an axis of the actuator even when the load is excessive while reducing manufacturing cost and manufacturing man-hours, and a tripod structure including the actuator. An actuator according to the present invention includes: a pipe; a ball screw used as a feed screw; a conversion nut used as a feed nut and screwed with the ball screw; a piston fixed integrally to the conversion nut and driven to expand and contract from a free end which is one end of the pipe; and a rolling bearing unit being provided on a tip of the free end of the pipe and including a plurality of roller followers holding the piston movably.

Abstract: Revving an engine may be helpful in various contexts, such as when servicing the vehicle. For example, in some types of services, a cleaning agent may be introduced into the intake and surrounding regions of an engine, and the engine may be revved to reduce a likelihood that the cleaning agent might puddle. In some instances, a device can be positioned within a vehicle interior and can be used to automatically rev the vehicle engine by depressing on the vehicle throttle. In other examples, an engine revving device may send a signal to an electronic-controlled throttle actuator.

Abstract: Drive for an adjusting instrument, comprising a single motor, in particular an electric motor, and a driving shaft coupled therewith. The driving shaft cooperates via a transmission selectively with a first and a second driving path respectively. The drive comprises furthermore an operating mechanism with which the transmission is switchable between the first and the second driving path. The operating mechanism is energized by the motor via the driving shaft and is configured, upon successive energization of the motor from rest of the drive, to select alternately the first and the second driving path as initial driving path.

Abstract: An automated game feeder that is virtually silent includes a hopper for holding feed, a bottom wall thereof defining a dispensing opening that, when open, allows feed to be dispensed. A dispensing gate is pivotally mounted to the bottom wall of the dispensing gate being operative to move, when actuated, between a closed configuration covering the dispensing opening and an open figuration allowing the feed to flow out of the hopper. A digital timer is electrically connected to the dispensing gate and programmable to determine when to open and close the dispensing gate. To maintain virtual silence, the deer feeder may include a linear actuator electrically connected to the dispensing gate and timer, the linear actuator having a servo motor that is very quiet when extending a rod configured to open or close the dispensing gate. When actuated, the linear actuator operates the gate according to an array of pivotal couplings.

Abstract: An electromotive drive for motor vehicle applications. In particular, the electromotive drive is part of a locking device of an electric connection device for electric or hybrid motor vehicles. For this purpose, an electric motor and a multistage transmission which is arranged downstream of the electric motor are provided as drive elements for acting on an actuating element, and a drive housing which houses drive elements is also provided. The actuating element is a locking element of the locking device for example. The drive housing is equipped with inner and/or edge-side protrusions. The protrusions have direct bearing points for individual drive elements or all of the drive elements.

Abstract: This extendable device includes: a base member; a first ball screw that is provided to the base member and that rotates according to a driving force supplied from a drive source; a first movable member that is coupled to the base member via the first ball screw and that moves relative to the base member as the first ball screw rotates; a second ball screw that is provided to the first movable member and that rotates as the first movable member moves; a third ball screw that is provided to the first movable member; a transmission mechanism that transmits the rotation of the second ball screw to the third ball screw; and a second movable member that is coupled to the first movable member via the third ball screw and that moves relative to the first movable member as the third ball screw rotates.

Abstract: A multifunctional steering column for a transportation vehicle having a steering bracket for connection of the steering column to a transportation vehicle body of the transportation vehicle; a steering tube held on the steering bracket and which has a steering tube axis; a steering wheel connection for mechanical coupling of the steering column to a steering wheel; and a steering gear end at which a steering gear clutch with a steering gear connection for mechanical coupling to a steering gear of the transportation vehicle is arranged. Also disclosed is a transportation vehicle and a method for operating a transportation vehicle.

Abstract: An electromechanical actuator may include a motor assembly and a ball nut. A split ball screw may be disposed between the motor assembly and the ball nut. The split ball screw may have an inner portion and an outer portion. The inner portion may interface with the motor assembly. The outer portion may interface with the ball nut. A pin may be configured to engage with the inner portion and the outer portion of the split ball screw to couple the outer portion with the inner portion.

Abstract: Linear actuator system comprising a linear actuator and at least one box, such as a control box containing a control and possibly also a mains-based power supply or a battery box with a rechargeable battery pack. The linear actuator system further comprises a fastening means for the box, wherein the fastening means is constituted by an elongated item with a rectangular outline and a square cross-section. The box has a groove for receiving the fastening means. The fastening means and the groove are constituted with mutually interacting releasable locking connections. The fastening means can be designed as an independent item that can be fastened where the box is to be placed. The fastening means can also be used to interconnect two or more boxes by fastening the fastening means to a box. Alternatively, the fastening means can be formed as an integral part of the box.

Abstract: There is provided a linear actuator provided with a dust-proof mechanism capable of preventing dust-proof belts from being deformed, improving a sealing performance between the dust-proof belts and a housing member, and achieving high dust-proof performance irrespective of a size of the linear actuator.

Abstract: In a ball screw apparatus according to the present invention, a ball guide path 19 for guiding a ball 15 scooped up in a tangential direction of a ball center track circle to a ball return path 17 is formed between a ball guide face 182 of a ball circulating member 18 and a ball guide path forming face 20 that is provided at a nut 12. Accordingly, it is possible to provide a ball screw apparatus capable of scooping up a ball in a tangential direction of a ball center track circle to circulate without reducing a diameter of the ball even when a groove interval of a ball screw groove is narrow or when the ball screw groove is a multistreak screw groove.

Abstract: A linear actuator with a dustproof mechanism provides reliable dustproof capability over the entire stroke of the actuator. A linear actuator 100 with a dustproof mechanism includes a ball screw, a movable stage 4 including a ball screw nut that engages the ball screw, the movable stage capable of making linear reciprocating motion in the axial direction of the ball screw in response to rotary motion of the ball screw, a housing member 2 disposed to cover at least the ball screw, openings 27, 28 formed in the housing member 2 along the path along which the movable stage 4 travels, and dustproof belts 29, 30 disposed inside the housing member 2 to block the openings 27, 28. The linear actuator 100 with a dustproof mechanism further includes end plate covers 105a, 105b that cover both ends of the housing member 2 and hence has high dustproof performance.

Abstract: A sliding device for use with a variety of machines is reduced in overall length, thereby being compact in construction. The sliding device has a drive train enclosure made airtight and is acceptable for use in a clean environment. The sliding device includes an elongated sliding unit enclosure of airtight construction, a sliding table and a driving motor that is coupled to the drive train enclosure in parallel with the sliding unit enclosure. The drive train enclosure receives a drive train to carry power from the driving motor to the sliding table. The drive train enclosure is mounted with the driving motor while maintaining airtightness.

Abstract: The invention concerns a piston wherein the mobile screw (2) is engaged in the bolt (8) integral with the mobile assembly (1). It is provided with a cylindrical axial housing (10) wherein is engaged the rod (7) integral at its front end with the expander assembly (4). At the end of its front travel, the rod is retained by its flange (19) pressed on the stop (11) such that the expanding ring (5) is compressed by the thrust of the piston body (3) and causes the flexible envelope (6) to expand.

Abstract: An improved linear actuator incorporates a DC motor whose stator is secured to a frame is provided for. To improve operational longevity and reliability of a linear actuator, the improved actuator includes a retention clutch and an axial load limiter. An axially configured retention clutch is configured to slidably fit within the open inner channel diameter of an axial load limiter and over a motor shaft of a linear actuator. In operation, the retention clutch reduces the impact loads on the stop and extending the fatigue life of these wearable components. Similarly, when the screw encounters axial loads during operation, these loads are distributed across both the axial load limiter and the motor, thereby reducing direct forces on the motor and contributing to an extended use of the motor component.

Abstract: One end of a cylinder disposed on the outer periphery of a ball screw shaft is fixed to the end face of a ball nut, while the other end of the cylinder is closed by an end plate to thereby form a lubricant filling space between the end plate and the leading end face of the ball screw shaft. And, the lubricant is supplied into the lubricant filling space from a grease nipple mounted on the cylinder.