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Key wallet butterfly type

  • US 10,646,014 B2
  • Filed: 06/30/2017
  • Issued: 05/12/2020
  • Est. Priority Date: 06/30/2016
  • Status: Active Grant
First Claim
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1. Wallet, having four wallet boundary edges, comprising two shell elements which are associated by connection means at a spine of the wallet in such a manner that they are configured to pivot relative to one another around a pivot axis at the spine such that a first longitudinal boundary edge of one shell element is configured to move away from a corresponding first longitudinal boundary edge of the other shell element to move between an open and a closed position of the wallet by mutually pivoting of the shell elements, wherein a pre tensioned membrane material extends from the one shell element via the spine to the other shell element and biases the shell elements to pivot in the direction from the closed to the open position of the wallet, and each shell element provides a main face of the wallet,wherein the wallet is configured to be closed against the bias of the pre-tensioned membrane material by squeezing the shell elements together about the pivot axis, wherein the pre tension of the membrane material increases at least 2.5% while moving from the open position to the closed position of the wallet.

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