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.

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.

A robotic surgical tool includes a drive housing having first and second ends, a spline extending between the ends and including a drive gear that rotates with spline rotation, and a carriage mounted to the spline. A shaft extends from the carriage, penetrates the first end, and has an end effector arranged at a distal end. An activating mechanism is housed in the carriage and includes an input gear operatively coupled to the drive gear such that rotation of the drive gear correspondingly rotates the input gear, and a firing rod defining external threads threadably engageable with internal threads of the input gear. The firing rod is coupled to a knife at the end effector such that movement of the firing rod correspondingly moves the knife in the same direction. The drive gear is rotated to rotate the input gear and thereby move the firing rod and the knife.

A torque transmission device (100) includes a variator of a continuously variable unit (CVU) (20) arranged in parallel with a layshaft gearset (30). The CVU (20) includes a first pulley (22) rotatably coupled to a second pulley (24), and the layshaft gearset (30) includes a first gear element (32) meshingly engaged with an intermediate gear element (34) meshingly engaged with a second gear element (36). A transmission input member (12) is rotatably coupled to the first pulley (22) of the CVU (20), and is selectively rotatably coupled to the first gear element (32) of the layshaft gearset (30) by activation of a first clutch (37). A transmission output member (14) is rotatably coupled to the second pulley (24) of the CVU (20) and rotatably coupled to the second gear element (36) of the layshaft gearset (30). The transmission is disposed to operate in a continuously variable mode when the first clutch (37) is disengaged, and to operate in a fixed gear mode when the first clutch (37) is engaged.

A transmission arrangement for a hybrid vehicle includes a powershift transmission, a summing gear assembly, a first transmission input shaft, and a second transmission input shaft. The summing gear assembly is for transmitting a drive torque to a drive shaft. The first transmission input shaft is connectable to an electric machine to transmit a first drive torque from the electric machine directly to the summing gear assembly. The second transmission input shaft is connectable to an internal combustion engine to transmit a second drive torque from the internal combustion engine to the summing gear assembly via the powershift transmission.

An electric commercial vehicle power steering system includes an input shaft, an electric motor, and a planetary gear set, a drive coupling, and an output shaft. A first one of a sun gear, a planet carrier, and a ring gear of the planetary gear set is connected to and rotatable with a rotor of the electric motor, and a second one of the sun gear, the planet carrier, and the ring gear of the planetary gear set is connected to and rotatable with a first gear of the drive coupling. A second gear of the drive coupling is connected to and rotatable with the input shaft. A globoidal worm drive is arranged between the input shaft and the output shaft. The globoidal worm drive couples the input shaft to the output shaft such that the output shaft is rotatable with the input shaft via the globoidal worm drive.

An electric commercial vehicle power steering system includes an input shaft, an electric motor, and a planetary gear set, a drive coupling, and an output shaft. A first one of a sun gear, a planet carrier, and a ring gear of the planetary gear set is connected to and rotatable with a rotor of the electric motor, and a second one of the sun gear, the planet carrier, and the ring gear of the planetary gear set is connected to and rotatable with a first gear of the drive coupling. A second gear of the drive coupling is connected to and rotatable with the input shaft. A globoidal worm drive is arranged between the input shaft and the output shaft. The globoidal worm drive couples the input shaft to the output shaft such that the output shaft is rotatable with the input shaft via the globoidal worm drive.

A coaxial gear (1), includes an axially oriented tooth system (5) with respect to a rotational axis (3) of the coaxial gear (1), a tooth carrier (7) having axially oriented guideways (9), tooth pins (11) received within the guideways (9) for engaging with the tooth system (5), wherein the tooth pins (11) are axially oriented within the guideways (9) by their respective longitudinal axes and are mounted within the guideways (9) in an axially displaceable manner, and a cam disc (15) rotatable about the rotational axis (3) for axially driving the tooth pins (11), wherein a plurality of bearing segments (17) is disposed between the cam disc (15) and the tooth pins (11) for bearing the tooth pins (11), and wherein, on a side facing the tooth pins, the bearing segments (17) have an elevation at least in sections formed as a spherical cap for bearing the respective tooth pin (11).

A coaxial gear (1), includes an axially oriented tooth system (5) with respect to a rotational axis (3) of the coaxial gear (1), a tooth carrier (7) having axially oriented guideways (9), tooth pins (11) received within the guideways (9) for engaging with the tooth system (5), wherein the tooth pins (11) are axially oriented within the guideways (9) by their respective longitudinal axes and are mounted within the guideways (9) in an axially displaceable manner, and a cam disc (15) rotatable about the rotational axis (3) for axially driving the tooth pins (11), wherein a plurality of bearing segments (17) is disposed between the cam disc (15) and the tooth pins (11) for bearing the tooth pins (11), and wherein, on a side facing the tooth pins, the bearing segments (17) have an elevation at least in sections formed as a spherical cap for bearing the respective tooth pin (11).

A washing machine appliance includes a wash basket rotatably mounted within a wash tub for receiving of a load of articles for washing. A motor assembly is operably coupled to the wash basket and an agitation element for selectively rotating the wash basket and the agitation element and includes a drive motor having a motor shaft defining an axial direction, a transmission assembly operably coupled to the wash basket for transmitting torque from the motor shaft to the wash basket and the agitation element and the agitation element, and a cooling fan mechanically coupled to the motor shaft for urging a flow of air as the drive motor rotates the motor shaft, the cooling fan comprising a plurality of blades, wherein the plurality of blades have a geometry that varies along the axial direction to follow a contour of an external surface of the drive motor.