Membrane switch for use over a steering wheel airbag assembly

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5588673
SERIAL NO

08189936

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A low profile membrane switch adapted for use over an automobile steering wheel airbag assembly for actuating a horn. The low profile membrane switch is comprised of an opposing pair of flexible electrodes separated by a dielectric layer. The dielectric layer has a unique pattern defining opposing electrode contact portions. A plurality of integral outwardly-extending protrusions are screen printed on the exterior surface of each flexible electrode, one over each of the opposing contact portions. These protrusions help concentrate an applied force to bring the respective electrode contact portions together to make electrical contact with the other. The opposing contact portions are defined by the dielectric pattern, and have a high density to insure redundancy and closure of the switch when one depresses the membrane switch with one's hand, and to insure the switch does not inadvertently close when flexed. An applied force of as little as four pounds causes closure of the membrane switch, even when positioned over a resilient airbag device.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
BERGQUIST COMPANY THE5300 EDINA INDUSTRIAL BLVD MINNEAPOLIS MN 55439

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Green, Mark Eden Prairie, MN 26 213
Hartline, Robert B Richfield, MN 1 13

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