There is provided a power transmission device to switch a coupled state and an uncoupled state between a first member and a second member which are arranged in a transmission path of a driving force to thereby control transmission of the driving force. The device includes a movable body having ferromagnetic property, a first magnetic path and a second magnetic path, and a permanent magnet. The device also includes a driving portion to excite the electromagnet in the forward direction and then increases an attraction force on a side on which a magnetic flux is increased or decreased.

An overrunning, non-friction coupling and control assembly, an engageable coupling assembly and locking members for use in the assemblies are provided. A centroid or center of mass of at least one of the locking members is substantially centered on a pivot axis of the locking member so that the locking member is substantially centrifugally neutral or balanced thereby making the locking member easier to pivot between engaged and disengaged positions with respect to the coupling members of its corresponding assembly at high rotational speeds.

An overrunning, non-friction coupling and control assembly, an engageable coupling assembly and locking members for use in the assemblies are provided. A centroid or center of mass of at least one of the locking members is substantially centered on a pivot axis of the locking member so that the locking member is substantially centrifugally neutral or balanced thereby making the locking member easier to pivot between engaged and disengaged positions with respect to the coupling members of its corresponding assembly at high rotational speeds.

An apparatus for feeding or conveying grain includes (i) a conveyor for moving grain and having an input end and an output end, and (ii) a viscous clutch either directly or indirectly connected to the input end of the conveyor for transmitting torque from an input component to the conveyor in a variable manner. A method of feeding or conveying grain using the conveyor includes operating the viscous clutch to transmit torque from the input component to the conveyor.

A sintered member having an annular shape, includes: a first face facing one side in an axial direction; a second face facing the other side in the axial direction; an inner peripheral face connected to an inner peripheral edge of the first face; and a plurality of tooth groups and a plurality of tooth-missing parts which are alternately disposed along a circumferential direction of the inner peripheral face. The second face includes a plurality of ball grooves arranged in parallel in the circumferential direction. Each tooth group includes a plurality of spline teeth that are continuous in the circumferential direction of the peripheral face. The number of plurality of tooth-missing parts is the same as the plurality of ball grooves. Positions in a radial direction in which the plurality of tooth-missing parts are formed are within ranges in the radial direction in which the ball grooves are formed.

A clutch assembly that includes an actuator, an apply spring, a pocket plate, which has a pocket, and a strut (e.g., a teeter-totter strut) retained in the pocket, is provided. The apply spring continually acts on the strut for the strut to be in an engaged position. The strut, in response to the actuator additionally acting on the strut, pivots from the engaged position to a disengaged position. The clutch assembly is configured to prevent unintended deployment of the strut due to shock load so that, when the strut is in the disengaged position due to the actuator additionally acting on the strut, the clutch assembly prevents the shock load from causing the strut to pivot from the disengaged position to the engaged position.

A clutch assembly that includes an actuator, an apply spring, a pocket plate, which has a pocket, and a strut (e.g., a teeter-totter strut) retained in the pocket, is provided. The apply spring continually acts on the strut for the strut to be in an engaged position. The strut, in response to the actuator additionally acting on the strut, pivots from the engaged position to a disengaged position. The clutch assembly is configured to prevent unintended deployment of the strut due to shock load so that, when the strut is in the disengaged position due to the actuator additionally acting on the strut, the clutch assembly prevents the shock load from causing the strut to pivot from the disengaged position to the engaged position.

When relative positions of cages are changed from first positions to second positions, rollers are moved toward each other against an elastic biasing force of an elastic member such that an off state is achieved in which the rollers are disengaged from a cam surface or an inner peripheral surface portion to have a clearance therefrom. When the relative positions of the cages are changed from the second positions to the first positions, the rollers are moved away from each other by the elastic biasing force such that an on state is achieved in which one of the rollers on a downstream side engages with the cam surface or the inner peripheral surface portion without any clearance while the other of the rollers on an upstream side has a clearance from the cam surface or the inner peripheral surface portion.

Disclosed are engine flexplates with integrated engine disconnects, methods for making and for using such flexplates, and motor vehicles with an engine flexplate having an integrated engine disconnect device. An engine flexplate assembly is disclosed for operatively coupling an engine to a hydrokinetic torque converter. The flexplate assembly includes a disk-shaped body with a central hub that rigidly attaches on the fore side thereof to the engine output shaft for common rotation therewith. A disconnect device, which is positioned on the aft side of the disk-shaped body, includes concentric inner and outer races. The outer race is rigidly attached to the disk-shaped body for common rotation therewith. The inner race rigidly attaches to the front cover of the TC housing for common rotation therewith. The disconnect device operatively disconnects the engine output shaft from the TC housing front cover when a torque transmitted therebetween reverses direction.

A rotational coupling device drives an output synchronous with either of two inputs. The device includes a hub disposed about an axis and an output member supported on the hub for rotation about the axis. First and second input members disposed about the hub are configured to rotate in first and second rotational directions and at first and second speeds, respectively, with at least one of the directions and speeds differing. A clutch member is disposed axially between the input members and coupled to the output member. An electromagnet is on an opposite side of the second input member relative to the clutch member. When the electromagnet is deenergized, the clutch member engages the first input member and the output member rotates with the first input member. When the electromagnet is energized, the clutch member engages the second input member and the output member rotates with the second input member.