A garden tool power system comprises a motor, a reducer and a transmission shaft. The motor transmits the power to the transmission shaft through the reducer to drive wheels on the transmission shaft. The reducer comprises a pinion connected to an output end of the motor and a gear engaged with the pinion. The transmission shaft includes left and right shafts connected with each other through a connecting shaft. The gear mounted on the connecting shaft has at least two guiding rods transversely located thereon and two centrifugal blocks located between the guiding rods. Each guiding rod has a spring surrounded therearound and each spring located between two centrifugal blocks has two opposite ends respectively abutted against the corresponding portions of the centrifugal blocks. A fixing sleeve provided on the periphery of the centrifugal blocks is mounted on the transmission shaft and has buckle structures matching with the centrifugal blocks.

A garden tool power system comprises a motor, a reducer and a transmission shaft. The motor transmits the power to the transmission shaft through the reducer to drive wheels on the transmission shaft. The reducer comprises a pinion connected to an output end of the motor and a gear engaged with the pinion. The transmission shaft includes left and right shafts connected with each other through a connecting shaft. The gear mounted on the connecting shaft has at least two guiding rods transversely located thereon and two centrifugal blocks located between the guiding rods. Each guiding rod has a spring surrounded therearound and each spring located between two centrifugal blocks has two opposite ends respectively abutted against the corresponding portions of the centrifugal blocks. A fixing sleeve provided on the periphery of the centrifugal blocks is mounted on the transmission shaft and has buckle structures matching with the centrifugal blocks.

A surgical instrument system comprising a handle assembly is disclosed. The handle assembly comprises an actuation trigger comprising a curved proximal portion and a curved cylinder surrounding the curved proximal portion of the actuation trigger. The curved cylinder comprises an electroactive polymer. The surgical instrument system comprises an actuation rod which is configured to transmit an actuation force and a sensor system which is configured to detect the magnitude of the actuation force. The electroactive polymer is responsive to the actuation force and provides feedback to a user of the surgical instrument system.

A surgical instrument comprising an end effector is disclosed. The end effector comprises a surgical dissector.

A generator arrangement includes a housing with a mounting feature, a main generator with an outboard shaft arranged within the housing and axially offset from the mounting feature along a rotation axis, and a permanent magnet generator. The permanent magnet generator has an inboard shaft arranged within the housing between the main generator and the mounting feature. The outboard shaft is coupled to the inboard shaft to provide rotation to the main generator through the permanent magnet generator. Accessory gearboxes and methods of generating electrical power are also described.

A generator arrangement includes a housing with a mounting feature, a main generator with an outboard shaft arranged within the housing and axially offset from the mounting feature along a rotation axis, and a permanent magnet generator. The permanent magnet generator has an inboard shaft arranged within the housing between the main generator and the mounting feature. The outboard shaft is coupled to the inboard shaft to provide rotation to the main generator through the permanent magnet generator. Accessory gearboxes and methods of generating electrical power are also described.

A modular surgical instrument is disclosed. The modular surgical instrument comprises a control interface, a shaft extending from the control interface, an end effector extending from said shaft, and a control circuit. The control circuit is configured to sense the electrical potential applied to the modular surgical instrument, determine if the sensed electrical potential is above a predetermined threshold, and adjust the operation of the modular surgical instrument when the sensed electrical potential exceeds the predetermined threshold.

A seat height adjustment actuator includes a brake drum fixable to a seat and defining an outer brake race. A rotatable brake hub includes a floor with a shelf, and a wall around the floor with cam surfaces defining an inner brake race. A pinion fixed to the brake hub engages a seat adjustment mechanism through the brake drum. Rolling brake elements wedge between the inner and outer brake races to lock the brake hub at rest. A clutch drum defines an outer clutch race, and includes tabs extending between the brake races to displace the brake rollers, unlocking the brake hub, under actuator input. A centering bias element on the floor simultaneously engages the shelf and a projection of the clutch drum for centering the projection over the shelf at rest. A driver cam receives actuator input and drives rotation of the clutch drum.

A seat height adjustment actuator includes a brake drum fixable to a seat and defining an outer brake race. A rotatable brake hub includes a floor with a shelf, and a wall around the floor with cam surfaces defining an inner brake race. A pinion fixed to the brake hub engages a seat adjustment mechanism through the brake drum. Rolling brake elements wedge between the inner and outer brake races to lock the brake hub at rest. A clutch drum defines an outer clutch race, and includes tabs extending between the brake races to displace the brake rollers, unlocking the brake hub, under actuator input. A centering bias element on the floor simultaneously engages the shelf and a projection of the clutch drum for centering the projection over the shelf at rest. A driver cam receives actuator input and drives rotation of the clutch drum.

Provided is a clutch assembly, a SSSV, and a method for operating an SSSV. The clutch assembly, in one aspect, includes an output coupler housing, an input shaft, and an electromagnet coupled to the input shaft. In at least one aspect, the electromagnet is configured to axially translate the output coupler housing from a de-coupled state to a coupled state when the electromagnet is energized. The clutch assembly, in one aspect, further includes one or more grooves located in one of an outer surface of the input shaft or an inner surface of the central opening, and one or more engagement members located in the other of the inner surface of the central opening or the outer surface of the input shaft.