Abstract: A seed meter for a planting machine is provided with an adjustable drive coupling between the seed meter and the planting machine main drive. The drive coupling includes a drive member connected to the planter drive and a driven member coupled to the seed meter shaft. The drive member and driven member are drivingly engagable with one another and held into the engaged position by a biasing member. The drive member and driven member are selectively movable relative to one another to a disengaged position, enabling adjustment of the seed meter relative to the drive by rotation of the meter shaft. Once released, the coupling self-engages.

Abstract: A transmission mechanism includes a threaded fastener and a nut assembly. The nut assembly is sleeved on the threaded fastener, and includes a first nut, a second nut, and an elastic member. The first nut forms two receiving portions, and the second nut defines two receiving cutouts. The elastic member is positioned between the first nut and the second nut. The receiving portions are received in the receiving cutouts, such that the first nut and second nut move only along an axis of the threaded fastener. The elastic member is compressed by the first nut and the second nut, to generate an elastic force exceeding a component force along the axis of the threaded fastener of an external force for rotating the first nut or the second nut.

Abstract: Disclosed is a clearance adjusting decelerator and an electric power steering apparatus having the same.

Abstract: An adjustment device with a dual-guiding structure has two worm wheels respectively meshed with two coaxial worm gears. The two worm gears are pivotally and longitudinally fixed by a driving shaft in line. An adjacent end of each worm gear has a locking recess to receive a locking head mounted on the driving shaft. Thereby, the locking head is selectively engaged with the locking recess of one of the worm gears to drive the corresponding worm gear when the locking head on the driving shaft is reciprocated. Then, one worm wheel engaged with the corresponding worm gear is rotated to rewind or release the wires on the work wheel.

Abstract: A step-by-step motor able to carry out up-and-down motion includes a housing, a transmitting gear, a worm gear, an interacting member, a top rod, a circuit board with a transmitting motor, a cover body and an adjusting member. The level of the headlamp of an automobile can be adjusted by inserting an adjustment tool through one lateral through hole of the recessed chamber of the cover body from outside to have the engage teeth of the adjustment tool engaged with one engage notch of the adjusting member and turning the adjustment tool to actuate the adjusting member to rotate and actuate the top rod to move upward, or by inserting an adjustment tool in the bottom slit of the projecting post of the adjusting member and turning it around to drive the adjusting member to rotate and actuate the top rod and the headlamp to move upward or downward.

Abstract: The furnace comprises a tubular inner chamber for the treatment of the raw material, mounted inside the enveloping body of the furnace which is insulated from the exterior and is provided with internal resistor systems for heating the chamber of the furnace by radiation, comprising means for feeding raw material at one end and means for controlling the output of completed product at the other end of the treatment chamber of the furnace, inside which a worm screw, driven in rotation from the exterior, is mounted rotatably, respective percussion devices being incorporated in the ends of the screw to prevent compaction of the mass on the screw.

Abstract: The invention concerns a control panel for a motor vehicle system comprising a housing supporting at least a double control unit formed by two rotating knobs arranged projecting relative to the housing and respectively coupled with two shafts, which are capable of being connected to the system elements. One of the shafts bears a coaxial worm screw for driving in rotation a toothed wheel about an axis orthogonal to the shaft axis, said toothed wheel capable of being functionally coupled with a first member of the system, while the other shaft is parallel to the first shaft and is capable of being functionally coupled with a second member of the system. The invention is particularly applicable to heating-ventilating and/or air conditioning systems.