A device for closing a delivery head of a dispensing machine for delivering fluid products includes a stationary support, a drive shaft, which rotates with respect to the stationary support around a vertical axis, and can be moved with respect to the stationary support along the same vertical axis, a cup-shaped closing element carried at the distal end of an arm fixed to a lower end of the drive shaft, and a screw and nut mechanism which controls a translation of the closing element in the direction of the longitudinal axis and a rotation movement to the longitudinal axis using a single actuator.

Disclosed is a linear actuator, including a drive motor, a transmission assembly, a rotary screw, a transmission nut, a clutch device, a self-locking device and a hand-pull release assembly. The clutch device is arranged between the transmission assembly and the rotary screw. The self-locking device is configured to generate frictional resistance to the rotary screw when the rotary screw rotates reversely, and the self-locking device includes a release torsion spring. The hand-pull release assembly includes a first driving member connected with the clutch device and a second driving member connected with the self-locking device, and has an initial state and a fully released state. During the process from the initial state to the fully released state, the first driving member drives the clutch device to disconnect power, and the second driving member drives the release torsion spring to extend.

Provided in this disclosure is a self-tightening nut and bolt system. The nut and bolt system can be configured to provide a consistent level of tightness and torque to reliably attach two mechanical components together. The nut comes with a microcontroller, and a motorized thread, where the microcontroller controls the tightness of the nut. The microcontroller allows the nut's tightness to be monitored, and controlled over time. This prevents the nut from becoming loose, and allows certain levels of tightness to be controlled over time.

An electromechanical brake pressure generator for a hydraulic braking system of a vehicle, including at least one threaded drive system. The system includes a hydraulic piston, a spindle and a spindle nut, which cooperate via a thread, and includes an electromotive drive, via which the spindle and the spindle nut are rotatable relative to one another. The hydraulic piston of the piston/cylinder unit at least partially radially surrounds the spindle and the spindle nut, the hydraulic piston being accommodated in a hydraulic cylinder of the piston/cylinder unit. An anti-twist protection is formed by a recess extending in the axial direction and forming a sliding surface, and by a sliding element protruding into the recess. The sliding element rests against a planar contact area of the sliding surface so that the hydraulic piston is secured against twisting and is axially displaceable by a rotation of the spindle or the spindle nut.

A system and method to enable treatment through cell therapy. The system can enable cell injection such as, for example, injecting beta cells/islets, cartilage cells, fat cells, and others. The system and method ensure that the delivery rate and delivered volume of the material pumped through a tube and into the injection needle is consistent over the course of the start-operation-stop process from run to run. The system and method can automatically stop delivery and alarm if an occlusion is detected during delivery.

An actuator is provided. The actuator includes a housing and a ram linearly movable relative to the housing. The ram is selectively mechanically coupled to a drive screw of the actuator such that in one configuration, the ram is decoupled from the drive screw to allow it to linearly move independently from rotation of the drive screw.

A locking mechanism for releasably locking a lock bolt against axial movement, the mechanism comprising an axially moveable member, arranged to move axially with the lock bolt biasing means, arranged to bias the piston towards the lock bolt; rotation means in threaded engagement with the piston such that rotation of the rotation means causes axial movement of the piston, and a solenoid assembly arranged to prevent rotation of said rotation means in a locked state, the solenoid assembly comprising: a solenoid plunger having a solenoid tip and a solenoid arranged to cause movement of the solenoid plunger relative to the rotation means, the solenoid assembly arranged such that in a locked state the solenoid causes the solenoid tip to engage with the rotation means such as to prevent rotation thereof, thus preventing axial movement of the piston.

A method of inserting a rivet into a workpiece comprises moving the rivet and workpiece relative to one another, along a longitudinal axis of the rivet, so as to drive the rivet into the workpiece. The rivet is rotated about its longitudinal axis, relative to the workpiece, for at least part of the time during which it is in contact with the workpiece. The speed of said rotation, or the speed of movement along the longitudinal axis of the rivet, is altered at least once before driving of the rivet into the workpiece is complete. One axial end of the rivet has a tip for piercing the workpiece, and the rivet has a substantially cylindrical shank extending longitudinally from the tip. The shank has one or more surface irregularities.

A linear actuator with an electric motor at one end and an electro-mechanical brake at the other, which is used to deploy and retract expandable rooms of recreational vehicles. When power is applied to the electro-mechanical brake, the leadscrew freewheels and allows manual compression of the actuator to return the expandable room to its highway travel position.

A lower attachment system for a trimmable horizontal stabiliser actuator (THSA) includes a screwshaft forming a part of or coupled to a main screw of the actuator, the screwshaft having an axial direction and a primary ballnut disposed on the screwshaft and forming a part of a primary load path of the lower attachment system. The THSA also includes a lower secondary nut and an upper secondary nut as well as a secondary connection arranged for axial and rotational movement and coupled to each of the lower secondary nut and the upper secondary nut. The secondary connection is arranged to be loaded when the secondary load path is loaded and the secondary load path also includes the upper and lower secondary nuts.