A belt driven linear actuator includes: a base, a linearly movable unit, a belt driven unit, a first cover, a second cover, a drive source, and a slide block. With the first and second covers removably disposed on the base, the first and second covers can be located at different positions to define different gaps in different directions, so as to allow the slide block to be assembled in different directions, and reduce the restriction on the assembling direction of the drive source. Besides, the width of the base is equal to the height of the base, and the height of the cover portion is equal to the height and the width of the base, which allows the base to be assembled in the same position while in different directions.

A single axis actuator includes a driving-side timing pulley located at one end in a longitudinal direction of a device frame in such a manner that a rotational center thereof is vertically oriented, a rotation transmission shaft coaxially connected to the driving-side timing pulley and extending upwardly, a driven-side timing pulley located at another end in the longitudinal direction of the device frame in such a manner that a rotation shaft thereof is vertically oriented, a timing belt bridged between the driving-side and driven-side timing pulleys, a slider connected to a part of the timing belt to be made movable in the longitudinal direction of the device frame, and a motor having a motor shaft that is connected to an upper end of the rotation transmission shaft.

A breast pump according to the present invention includes a variable pressure generating unit, the variable pressure generating unit including a power driving unit including a stepping motor that is capable of rotating both normally and in reverse, and a negative pressure forming unit that creates a negative pressure state periodically by causing an elastic body to deform in accordance with a cycle period formed by the power driving unit, wherein the negative pressure forming unit is coupled to the expressing unit, and the stepping motor is capable of modifying an amplitude of the cycle period and the cycle period during negative pressure formation as desired. Hence, a suction pressure and a pressure increase/decrease cycle can both be set as desired, and moreover, a breast pump that uses electric power can be constructed compactly.

In one example, a carriage control process using rotary encoder counts includes: reading an outbound rotational count for a carriage drive when the carriage reaches a first translational reference position in an outbound pass along a path; reading a return rotational count for the carriage drive when the carriage reaches a second translational reference position on a return pass back along the path; advancing a rotational start count for the carriage drive at the beginning of a next outbound pass if the outbound count is less than the first reference count and the return count is less than the second reference count; or retarding a rotational start count for the carriage drive at the beginning of the next outbound pass if the outbound count is more than the first reference count and the return count is more than the second reference count.

One embodiment provides a drive system that includes a drive device with at least one drum for spooling at least one wire rope. A mounting device is connected to the drive device and a single-axis tracker. At least one partial pulley is connected to a torque tube. The at least one partial pulley is configured to accept the at least one wire rope and to transfer leveraged drive forces to the torque tube.

An automatic tensioning apparatus is provided that includes a tensioning drive unit having: a longitudinally extending stationary base frame with a plurality of guides extending between a lower portion and an upper portion, and a plurality of rotatable feed wheels axially secured at the lower portion, as well as a translatable drive frame slidably coupled to the plurality of guides with a drive assembly coupled to the drive frame, the drive assembly including a drive motor and a tensile member interface for engaging and rotationally translating a tensile member. The tensioning drive unit further including a plurality of drive frame actuators actuatable to move the drive frame between a bottom frame position and a top frame position, as well as a sensor for at least indirectly sensing the position of the drive frame along a longitudinal base frame axis.

A system for maneuvering a pick-up device such as a vacuum, claw, or other crane for an arcade game or the like comprises a metallic frame and two motors. A mount is suspended over the frame and the movement of the mount is managed by monofilament loops rotated by the motors using a set of four stacks of pulleys. The arrangement of the pulleys allows the mount and pick-up device to be easily maneuvered anywhere within the frame.

A quick fastening device, which comprises an energy storage medium, an impact unit, and a driving mechanism; the driving mechanism comprises a fixed sun gear, an output shaft not linked to the sun gear, a crank fixed on the upper end of the output shaft, a planetary gear installed on the crank in a spinning manner and capable of revolving around the sun gear as the crank rotates, and a connecting rod module mounted on the upper end of the planetary gear and connected to the impact unit. A linkage element is arranged between the planetary gear and the sun gear for driving the planetary gear to rotate in a direction opposite to the direction in which the planetary gear revolves relative to the sun gear.

A transmission converting rotational to translational movement for linear motion applications is provided. Several pulleys direct a single closed flexible continuous element to engage with two coupled pulleys on a moving element, forming a transmission which may realize large transmission ratios.

A translational-rotary machine is provided as a physical exercise machine particularly for the rehabilitation or training of upper and lower limbs for both passive and active therapies. The machine can perform movements that: allow a lower shaft to rotate while the carriage is stationary; allow the lower shaft to not rotate while the carriage translates in a direction of applied force; or allow a translational-rotary movement.