Abstract: A dual seed metering device for seeds, grain or other granulate materials, powered by direct drive. More specifically, a dual seed metering device for sowing machines, driven by a single electric motor of the annular type, with a hollow shaft, which comprises two chambers or seed reservoirs, each being loaded with seeds of different types, the device being capable of selectively sowing seeds from one reservoir or the other, wherein selection of the type of seed is instantaneous and does not require stopping the equipment nor require manual mechanical adjustments.

Abstract: The present invention refers to a dual seed metering device for seeds, grain or other granulate materials, powered by direct drive. More specifically, the present invention refers to a dual seed metering device for sowing machines, driven by a single electric motor of the annular type, with a hollow shaft, which comprises two chambers or seed reservoirs, each being loaded with seeds of different types, the device being capable of selectively sowing seeds from one reservoir or the other, wherein selection of the type of seed is instantaneous and does not require stopping the equipment nor require manual mechanical adjustments.

Abstract: A direct drive seed metering device for a sowing machines with a rotatable vacuum chamber operated by vacuum and driven by a coaxial electric motor. The rotatable vacuum chamber has a seed metering disc for capturing seeds from a reservoir and laying them in a controlled manner in a furrow in the soil. The rotatable vacuum chamber is created by a concave plate located within the housing and sealingly attached to a face of the seed metering disc that is supplied a vacuum by a non-rotatable tube having a protruding hollow member, a flange and an of extraction outlet attached to a vacuum generator. A motor with an annular hollow-shaft is coupled to the concave plate wherein the vacuum generator lowers the air pressure on a face of the metering disc so as to capture and retain the seeds within the seed capturing and retaining holes arranged on another face of the metering disc opposite the rotatable vacuum chamber.

Abstract: A direct drive seed metering device for a row crop sowing machine with a seed metering disc rotatable about a central shaft having a plurality of seed capturing and retaining holes for capturing and retaining the seeds and laying them in a controlled manner in a furrow. The seed disc has a flexible sealing member attached to an inner wall of the housing and sealingly pressed against a face of the metering disc thereby forming a vacuum chamber by a the vacuum generator that lowers the air pressure on a face of the metering disc so as to capture and retain the seeds. The vacuum chamber is created by the vacuum generator being fluidly connected to the chamber through a hollow shaft of a drive motor and through a perforated hollow hub.

Abstract: A direct drive seed metering device for sowing machines comprising a rotatable vacuum chamber operated by vacuum and driven by a coaxial electric motor, the rotatable vacuum chamber comprising a seed metering disc for capturing seeds from a reservoir and laying them in a controlled manner in a furrow in the soil, where in the coaxial electrical motor couples directly and coaxially to the rotatable vacuum chamber without the need for intermediate transmission elements, redactors, gears or timing belts, and where said coaxial electrical motor is a toroidal electric motor with a hollow rotor shaft, which fluidly connects said seed capturing means with a vacuum generating means.

Abstract: A direct drive seed metering device for sowing machines operated by vacuum and driven by a coaxial electric motor, comprising a seed metering disc for capturing seeds from a reservoir and laying them in a controlled manner in a furrow in the soil, where in the coaxial electrical motor couples directly and coaxially to the metering disc without the need for intermediate transmission elements, redactors, gears or timing belts, and where said coaxial electrical motor is a toroidal electric motor with a hollow rotor shaft, which fluidly connects said seed capturing means with a vacuum generating means.

Abstract: A direct drive seed metering device for sowing machines operated by vacuum or high pressure and driven by a coaxial electric motor with a seed metering disc for capturing seeds from a reservoir and laying the seed in a controlled manner in a furrow in the soil. The coaxial electrical motor couples directly and coaxially to the metering disc without the need for intermediate transmission elements, redactors, gears or timing belts, and the coaxial electrical motor is a toroidal electric motor with a perforated hollow rotor shaft which fluidly captures the seed with a vacuum or high pressure generating device.

Abstract: A direct drive seed metering device for sowing machines operated by vacuum or high pressure and driven by a coaxial electric motor, comprising a seed metering disc for capturing seeds from a reservoir and laying them in a controlled manner in a furrow in the soil, where in the coaxial electrical motor couples directly and coaxially to the metering disc without the need for intermediate transmission elements, redactors, gears or timing belts, and where said coaxial electrical motor is a toroidal electric motor with a hollow rotor shaft, which fluidly connects said seed capturing means with a vacuum or high pressure generating means.