An axisymmetric clutch mechanism includes a drive clutch body having a drive bearing surface and a drive clutch surface; an intermediate clutch body having an intermediate clutch surface configured for sliding contacting engagement with the drive clutch surface; a driven clutch body having a driven bearing surface configured for transferring compressive axial force to the drive bearing surface; and rotational drag means for generating resistance to rotational slippage between the drive clutch surface and the intermediate clutch surface. The intermediate and driven clutch bodies are helically coupled in a first rotational direction, forming a first helical coupling having a first lead angle, and with the taper angle of the drive clutch surface and the intermediate clutch surfaces and the first lead angle being selected such that the clutch mechanism will lock when the drive clutch body is rotated relative to the driven clutch body in the first rotational direction.

An integrated torque limiter/no-back device for use in an actuator with an input shaft, an output, and a gear reduction. The device includes an input ramp, an output ramp coupled to the gear reduction, a combined ramp disposed between the input ramp and the output ramp, a first plurality of balls arranged between the input ramp and the combined ramp, a second plurality of balls arranged between the combined ramp and the output ramp, a pin, and a brake. The pin extends from the input ramp to the combined ramp and coupled to the input shaft. The combined ramp, the output ramp, and the second plurality of balls therebetween are configured to operate as a torque limiter by causing the combined ramp and the output ramp to separate and the output ramp to engage the brake when the torque from the input shaft exceeds a torque threshold.

A rotary device assembly is provided and includes an input shaft coupled to a torque generating device, an output shaft and a rotary device disposed to transmit first torque from the input shaft to the output shaft and configured with no-back capability to prevent second torque applied to the output shaft from being transmitted to the input shaft in an event the second torque deceeds a torque-limiting threshold and the no-back capability and torsional lock-up capability to prevent an overload of the torque generating device in an event the second torque exceeds the torque-limiting threshold.

A rotary device assembly is provided and includes an input shaft coupled to a torque generating device, an output shaft and a rotary device disposed to transmit first torque from the input shaft to the output shaft and configured with no-back capability to prevent second torque applied to the output shaft from being transmitted to the input shaft in an event the second torque deceeds a torque-limiting threshold and the no-back capability and torsional lock-up capability to prevent an overload of the torque generating device in an event the second torque exceeds the torque-limiting threshold.

Proposed is a complex clutch apparatus which includes a rotating block provided with a central shaft extending upward and an upward inclined protrusion part which surrounds a lower portion of the central shaft and is spaced apart by a predetermined distance from the central shaft, a C-shaped plate spring which surrounds an outer circumferential surface of the upward inclined protrusion part and is in elastically close contact with the outer side surface of the upward inclined protrusion part, a clutch gear provided with a downward inclined protrusion part press-fitted between the central shaft and the upward inclined protrusion part, and a holding protrusion inserted between opposite ends of the C-shaped plate spring in a longitudinal direction thereof; and an elastic body which is fixedly coupled to the central shaft and applies a downward elastic force to an upper surface of the clutch gear.

Proposed is a complex clutch apparatus which includes a rotating block provided with a central shaft extending upward and an upward inclined protrusion part which surrounds a lower portion of the central shaft and is spaced apart by a predetermined distance from the central shaft, a C-shaped plate spring which surrounds an outer circumferential surface of the upward inclined protrusion part and is in elastically close contact with the outer side surface of the upward inclined protrusion part, a clutch gear provided with a downward inclined protrusion part press-fitted between the central shaft and the upward inclined protrusion part, and a holding protrusion inserted between opposite ends of the C-shaped plate spring in a longitudinal direction thereof; and an elastic body which is fixedly coupled to the central shaft and applies a downward elastic force to an upper surface of the clutch gear.