Abstract: A grasp assist device includes a glove with first and second tendon-driven fingers, a tendon, and a sleeve with a shared tendon actuator assembly. Tendon ends are connected to the respective first and second fingers. The actuator assembly includes a drive assembly having a drive axis and a tendon hook. The tendon hook, which defines an arcuate surface slot, is linearly translatable along the drive axis via the drive assembly, e.g., a servo motor thereof. The flexible tendon is routed through the surface slot such that the surface slot divides the flexible tendon into two portions each terminating in a respective one of the first and second ends. The drive assembly may include a ball screw and nut. An end cap of the actuator assembly may define two channels through which the respective tendon portions pass. The servo motor may be positioned off-axis with respect to the drive axis.

Abstract: The invention concerns a displacement device comprising a transmission 2 driven by an electric motor 1, guide rails 5, a displacement slider 6, a transmission housing 8 and a closure cover 7, characterized in that an externally threaded nut (4) is arranged longitudinally slidably on a profile bar (3) between the transmission (2) and said externally threaded nut (4) and said externally threaded nut (4) is mounted rotatably in a displacement slider (6) in such a way that said externally threaded nut (4) is longitudinally displaced upon rotation by the transmission (2) which is driven by the drive motor (1) and the profile bar (3) in the thread profile segments of the guide rails (5) and is displaced along the guide rails (5) by way of the end run-on surfaces (9) of the displacement slider (6).

Abstract: A linear step motor can include: a motor housing fixedly mounted at an inner surface of a ring-shaped stator and formed with an opening; a rotor rotatably mounted at a space centrally formed at the stator; a cover member coupled to a bearing to open/close the opening; a nut shaft centrally arranged at the rotor, coupled to an outside of the cover member by passing through a shaft hole centrally formed at an inner ring of the bearing, coupled at a periphery by a magnet and formed with a female screw gear-combined with a lead screw member formed at an inner surface with a male screw; and a fixing unit integrally formed with the nut shaft and fixed to the bearing coupled to the cover member.

Abstract: A pneumato-mechanical regenerative power source converts mechanical rotational power at an input/output shaft to stored potential energy, and vice versa, by coupling the input/output shaft to a ball screw via a planetary gear system, which translates a ball nut in cooperation therewith, which in turn translates a piston that provides for either compressing or expanding an associated energy storage gas. A first roller-clutch mechanism provides for locking the carrier of the planetary gear system when storing energy, and releasing the carrier when releasing stored energy, wherein upon release, the ball screw is coupled to the input/output shaft via an overrunning clutch, and the carrier may be locked to limit the release of stored energy.

Abstract: An actuator having two or more interconnected movement components, wherein the movement components are designed as linear actuators with substantially coaxial longitudinal axes or longitudinal axes that are parallel to each other and that are interconnected in longitudinal direction such that their linear movements are superimposed on one another, and such that at least one of the linear actuators can be stopped at one or several predetermined positions.

Abstract: An actuator comprising a motor having a drive shaft, a spindle which is directly or indirectly driven by the drive shaft and which exhibits an axial recess being delimited by an internal limiting surface, said spindle comprising an internal thread arranged on the limiting surface, said thread having a predetermined axial extension, and a piston rod which is arranged in the recess to perform a translational movement relative to the spindle between a first end position and a second end position when the spindle is rotating, said end positions defining a length of stroke of the piston rod, said piston rod comprising a threaded portion which exhibits an external thread and has a predetermined axial extension, said external thread being adapted to interact with the internal thread of the spindle. According to the invention, the axial extension of the internal thread of the spindle is at least twice as long as the axial extension of the threaded portion of the piston rod.

Abstract: A mechanical linear actuator having a tubular member that is defined by a housing for rotatably and axially supporting a circular nut, a lead screw is mated to the circular nut so that it can move axially in and out of the tubular member. A torsion spring clutch brake is wound about the circular nut to normally brake the nut and thus prevent the lead screw from moving into or out of the tubular member. An unlocking mechanism can remotely unwind the torsion spring clutch brake to sufficiently release the circular nut and thus allow the lead screw to pass in and out of the tubular member. An adjustable stop is provided for adjusting the stroke of the actuator.

Abstract: An adjusting distance device using a resilient lead screw automatically includes a pair of split semi-screws which have exterior screw threads resiliently retained in place inside a lead sleeve which have inner screw threads. When the resilient lead screw is in an open status, the threads of the split semi-screws will be in mesh with the threads of the lead sleeve. When the resilient lead screw is a closed status, the threads of the split semi-screws will not be in mesh with the threads of the lead sleeve, thus the lead screw can be rapidly pushed to its working position or retracted to adjust distance rapidly. The lead screw can be centered, engaged, split and self-locked automatically. This device has compact structure, can be used effectively, and can be fabricated relatively small in size. It can be used in vice or jack.