According to GlobalData’s company profile on REE Automotive, In-wheel motor EV suspensions was a key innovation area identified from patents. REE Automotive's grant share as of January 2024 was 36%. Grant share is based on the ratio of number of grants to total number of patents.

Hydraulic pump with screw, nut, tube, and piston assembly

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Source: United States Patent and Trademark Office (USPTO). Credit: REE Automotive Ltd.

A hydraulic pump system has been patented, comprising a screw with an internal tubular cavity and port, a nut, a cylindrical tube with a hollow channel, and a piston assembly to control liquid flow. The system includes a motor to rotate the nut, a housing accommodating the components, and a source tubular cavity for generating pressure difference. The piston assembly dampens pressure fluctuations, and various sensors and gauges are included for monitoring and control purposes.

Furthermore, the patented system can be integrated into brake systems and wheel corner systems. In brake systems, the hydraulic pump circulates brake liquid between the reservoir and actuator, controlled by a controller. In wheel corner systems, the pump is coupled to the sub-frame and communicates with the brake liquid reservoir and actuator to control the rotation rate of the wheel hub. The design includes sealing mechanisms, pressure sensors, and couplers to ensure efficient and reliable operation, making it a versatile and adaptable solution for hydraulic applications in various systems.

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