BorgWarner has filed a patent for a radial air bearing device that includes a bearing plate, spring steel sheet, and bearing receptacle. The device is designed to improve stability and performance by allowing the spring steel sheet to run between the bearing plate and inner wall of the receptacle, with retaining lugs engaging in grooves. GlobalData’s report on BorgWarner 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 BorgWarner, turbocharger bearings was a key innovation area identified from patents. BorgWarner's grant share as of September 2023 was 64%. Grant share is based on the ratio of number of grants to total number of patents.

Radial air bearing device with retaining lugs and grooves

Source: United States Patent and Trademark Office (USPTO). Credit: BorgWarner Inc

A recently filed patent (Publication Number: US20230313831A1) describes a radial air bearing device. The device includes a bearing plate with one or more parts, each having an inner main side and two wide sides. The wide sides of the bearing plate parts have retaining lugs that are bent outward. A spring steel sheet is also included, with one or more parts that run between the bearing plate and an inner wall of a bearing receptacle. The spring steel sheet parts also have retaining lugs that engage with grooves in the recess of the bearing receptacle.

The patent also describes various configurations and features of the radial air bearing device. For example, the retaining lugs on the spring steel sheet parts can engage in the grooves of the bearing receptacle. The retaining lugs can be bent outward either longitudinally or transversely to the axial direction of the recess. In the case of a single bearing plate part or spring steel sheet part, the wide sides face each other. However, in the case of multiple parts, the wide sides of adjacent parts face each other.

The retaining lugs are formed from plate portions of the bearing plate part and/or the spring steel sheet part. The bearing plate part or the spring steel sheet part can have a rectangular shape with slots or protruding plate portions for the retaining lugs. The bearing plate can also have tongues formed by recesses, and the spring steel sheet can have corresponding tongues. The recess in the bearing receptacle can be U-shaped, H-shaped, rectangular, or triangular.

The patent also includes a method for producing the radial air bearing device. This method involves imprinting a wave form into a spring steel sheet blank to form a spring steel sheet part, bending plate regions of a bearing plate blank to form a bearing plate part, and inserting the spring steel sheet part and the bearing plate part into the recess of the bearing receptacle.

Overall, this patent describes a radial air bearing device with various configurations and features that improve its performance and manufacturing process.

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