Mahle has been granted a patent for a gerotor device for a pump apparatus. The device includes at least two gerotor stages with inner and outer rotors, a rotor body, and a housing. The tooth gaps of the gerotor stages are fluidically sealed, ensuring efficient operation. GlobalData’s report on Mahle gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Mahle, Battery management systems was a key innovation area identified from patents. Mahle's grant share as of February 2024 was 40%. Grant share is based on the ratio of number of grants to total number of patents.

Gerotor device for pump apparatus with fluidically sealed tooth gaps

Source: United States Patent and Trademark Office (USPTO). Credit: Mahle GmbH

A recently granted patent (Publication Number: US11927188B2) discloses a novel gerotor device for a pump apparatus. The device comprises at least two gerotor stages, each consisting of an inner rotor with teeth engaging outer rotors with tooth gaps. The device includes a rotor body with open tooth gaps and teeth, housed in a structure that seals the tooth gaps against each other or the surrounding area. The rotor body features circumferential grooves for sealing with axially projecting ribs on the housing, ensuring effective fluidic sealing.

Furthermore, the patent describes a pump apparatus incorporating the gerotor device for pumping liquids. The apparatus includes a cavity with a flow path and the gerotor device with multiple stages for liquid delivery. The design ensures efficient operation by sealing the tooth gaps and utilizing circumferential grooves filled with oil for effective sealing. The rotor body's structure allows it to function as both the inner and outer rotors of the gerotor stages, providing a compact and monolithic design. The pump apparatus is particularly suitable for use in motor vehicles, supplying liquid to transmissions, showcasing the versatility and applicability of the patented technology in various industries.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.