An improved telescopic linear actuator is disclosed comprising a rotational drive mechanism specially adapted and assembled within a tubular housing to reduce noise and vibration of the actuator during its operation. The rotational drive mechanism includes an electric motor adapted for low current operation, a gearbox containing a planetary gear axially connected to the motor with a stepped-up gear ratio, and a drive screw member operatively connected to the gearbox to extend longitudinally through the tubular housing with a specially configured threaded surface formed along the screw member having a reduced thread count and associated increased thread pitch to operatively engage and drive a movable piston member through the tubular housing with a substantially silent glide being exhibited.

A telescopic linear actuator includes a rotational drive mechanism specially adapted and assembled within a tubular housing to reduce noise and vibration of the actuator during its operation. The rotational drive mechanism includes an electric motor adapted for low current operation, a gearbox containing a planetary gear axially connected to the motor with a stepped-up gear ratio, and a drive screw member operatively connected to the gearbox to extend longitudinally through the tubular housing. The drive screw is provided with a specially configured threaded surface formed along the screw member having a reduced thread count and associated increased thread pitch to operatively engage and drive a movable piston member through the tubular housing.

The invention relates to a pipetting device for receiving and dispensing fluid volumes. The pipetting device has a drive device with an electric motor and a gear device with a first output device. The gear device is driven by the electric motor by means of a rotary motion and is designed to transmit a rotary motion of the electric motor to the first output device. According to the invention, the gear device has a second output device and is designed to transmit a rotary motion of the electric motor to the second output device.

A jam free dual redundant actuator lane changer system includes a primary lane system and a secondary lane system. The primary lane system is configured to provide actuation of a component during a normal operation while the secondary lane system remains in a standby configuration; and the secondary lane system is configured to provide an actuation of the component when the primary lane system fails or jams, but freed from its output to the component.

A landing gear assembly includes a leg assembly including a first portion and a second portion, wherein the first and second portions of the leg assembly telescopingly engage one another, a gear assembly operably coupled to the first and second leg portions and configured to telescopingly move the first and second leg portions with respect to one another, the gear assembly including an input shaft, and a drive assembly coupled to the gear assembly comprising a gear arrangement configured to drive the drive shaft of the gear assembly at a first speed and at a second speed that is different than the first speed, an electric motor configured to drive the gear arrangement, and a battery configured to provide power to the motor.

A rotation support structure for an electric cylinder includes a motor attached to a housing and including an output shaft; and a speed reduction mechanism connected to the output shaft. The speed reduction mechanism includes a gear unit including a first gear and a shaft support portion and has an outer member facing an inner surface of the housing and a ball, and an annular second gear fixed to the housing and meshing with the first gear, one side end portion of the outer member faces the inner surface of the housing or a spacer attached to the housing, and the other side end portion faces the second gear. A gap is formed between the outer member and the second gear, and between the outer member and at least either the housing or the spacer. A gap is formed between the outer member and the inner surface of the housing.

An actuator (1) comprising a motor (2) assembly, a drive coupling (113, 13, 313) assembly and an actuator shaft (114, 14). The motor (2) assembly comprising a motor housing (120, 20), having a cover (122, 22) and a base (123, 23); an electric motor (111, 11, 211, 2), comprising an external stator (111, 11, 211) and an internal rotor (112, 22); and a hollow output shaft (130, 30, 330) that is connected co-axially with the internal rotor (112, 12) such that rotation of the internal rotor (112, 12) causes a corresponding rotation of the hollow output shaft (130, 30, 330). The driving coupling (113, 13, 313) assembly comprises a drive coupling housing (115, 15, 315) containing a drive coupling (113, 13, 313), wherein the drive coupling (113, 13, 313) engages the hollow output shaft (130, 30, 330) such that rotation of the hollow output shaft (130, 30, 330) causes a corresponding rotation of the drive coupling (113, 13, 313). The actuator shaft (114, 14) extends through the hollow output shaft (130, 30, 330) and the internal rotor (112, 12), and engages the drive coupling (113, 13, 313) such that rotation of the drive coupling (113, 13, 313), by the hollow output shaft (130, 30, 330), causes the actuator shaft (114, 14) to move axially.

Spindle assembly for a spindle drive device (10) comprising a thrust tube (30) and a spindle nut (32), which is arranged on the thrust tube (30) in a rotationally fixed manner, wherein the spindle nut (32) can be brought into threaded engagement with a spindle (26) of the spindle drive device (10), and wherein an end stop for the spindle nut (32) is arranged on the spindle (26), wherein the end stop comprises a damping element (36) consisting of a resiliently formed and hollow-cylindrically shaped stamped part (60).

The subject matter of this specification can be embodied in, among other things, a rotary lock assembly that includes an epicyclic gear assembly that includes a sun gear assembly having a sun gear axial aperture defined therein, a ring gear assembly, and a planet gear assembly mechanically engaged to the sun gear assembly and to the ring gear assembly, a lock motor configured to urge rotation of the sun gear assembly, and a screw lead extending axially through the sun gear axial aperture.

A linear-actuated press machine comprises a press ram with a tool, a first linear actuator having a first actuator rod, a second line actuator having a second linear actuator rod, a high-speed motor coupled to the first linear actuator for providing a high-speed condition on the press ram, a first high-torque motor coupled to the first linear actuator, and a second high-torque motor coupled to the second linear actuator. The press machine (i) advances the tool toward the part by operation of the high-speed motor associated with the first linear actuator, (ii) forms the part with the tool by simultaneous operation of the first high-torque motor associated with the first linear actuator and the second high-torque motor associated with the second linear actuator, and (iii) retracts the tool from the part by operation of the high-speed motor associated with the first linear actuator.