Cochlear has been granted a patent for an electromagnetic transducer with a non-axial air gap and a coil that generates a dynamic magnetic field. The transducer allows the coil to move relative to a stationary component when the dimension of the air gap varies during transduction. GlobalData’s report on Cochlear 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 Cochlear, Neuromodulation implants was a key innovation area identified from patents. Cochlear's grant share as of September 2023 was 47%. Grant share is based on the ratio of number of grants to total number of patents.

Patent granted for an electromagnetic transducer with non-axial air gap

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

A recently granted patent (Publication Number: US11778385B2) describes an electromagnetic transducer with unique features. The transducer includes at least one active air gap and a coil that generates a dynamic magnetic field. The coil is spaced away from the active air gap, which is a non-axial air gap that varies in dimension during transduction. The transducer is designed so that the coil moves relative to a stationary component when the dimension of the air gap changes.

In one embodiment, the active air gap extends in the direction of the longitudinal axis of the coil. The air gap is established by two surfaces that tilt relative to each other during transduction. The transducer may also include a static component that remains static during transduction, while the surfaces of the air gap move relative to the static component.

The transducer can be coupled to an object through a coupling, and the surfaces of the air gap move relative to the coupling during transduction. Additionally, the transducer may include counter masses that tilt symmetrically or rock relative to the longitudinal axis of the transducer during transduction.

The patent also describes an actuator version of the transducer, where a seismic mass assembly is part of the dynamic magnetic flux circuit. The transducer is designed to generate a greater amount of force output compared to the same mass of seismic mass and the same battery power consumption. The transducer may include static magnetic flux circuits that interact with the dynamic magnetic flux circuit.

Furthermore, the patent discusses the configuration of the transducer in a device, where an output section remains static while the dimension of the air gap varies with transduction. The transducer can also include a coil that moves when the side of the air gap moves.

Overall, this granted patent presents an electromagnetic transducer with unique features, including non-axial air gaps, movable coils, and various configurations for different applications. These features aim to enhance the performance and efficiency of the transducer in generating force output and transducing energy.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

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.