# US 2019/0313754 A1 · Key wallet butterfly type > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0313754 A1 - Document ID: US20190313754A1 - Status: Published application - Kind: A1 - Application number: 16/314,267 - Filed: 2017-06-30 - Published: 2019-10-17 - Earliest claimed: 2016-06-30 - Assignees: R.J. Van Geer Beheer BV - Inventors: René Johan VAN GEER - Web page: https://patentgrep.com/patent/US20190313754A1 ## CPC - A45C 11/32: Bags or wallets for holding keys {(key-holding inserts A45C13/023)} - A45C 11/324: {with pivoting keys (A45C11/325 takes precedence)} - A45C 1/06: Wallets ({devices for the prevention of theft or loss of wallets A45C13/185}; for holding keys A45C11/32); Notecases - A45C 13/005: {Hinges} - A45C 13/007: {with spring means} - A45C 2001/067: {Rigid casings} - A45C: PURSES; LUGGAGE; HAND CARRIED BAGS ## Abstract Disclosed is a wallet comprising two shell halves which are associated by a rigid spine to open and close the wallet, and containing a bunch of keys, anchored to the wallet. The wallet is biased to the open position by a pre tensioned skin which covers windows in the two shell halves. The skin allows temporary outward bulging by elasticity, and immediately springs back into the initial unloaded state at the time the bulging load is removed. ## Claims ### Claim at position 1 1-18. (canceled) ### Claim 19 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 can pivot relative to one another around a pivot axis at the spine such that a first longitudinal boundary edge of the one shell element, can move away from the 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, both if the wallet is in the open and closed position, and each shell element provides a main face of the wallet and further pivoting, due to the bias of the pre tensioned membrane material, of the shell elements in the direction from the closed to the open position of the wallet, beyond the open position of the wallet is blocked by a stop means of the wallet. ### Claim 20 (depends on 19) Wallet according to claim 19, comprising an open position and a closed position, in the closed position providing an elongated sleeve like shape, in the completely open position of the wallet the shell elements make a mutual angle limited to less than 120 degrees, the shell elements are merely connected to each other along a second longitudinal boundary edge, also providing a hinged connection providing a rigid spine, in the closed position the inner space of the wallet is open to the environment via three of its four wallet boundary edges, which four wallet boundary edges provide a rectangular shape when viewing towards one of the main faces of the wallet, the wallet moves between the open and closed position by pivoting of the shell elements at the spine, preferably the wallet boundary edge provided with the spine is the only wallet boundary edge that seals the wallet from the environment. ### Claim 21 (depends on 19) Wallet according to claim 19, containing a bunch of metal house door keys, which bunch is anchored to the wallet by retaining means, which retaining means can move between a retracted position, in which the retaining means and the bunch of keys are completely within the wallet, and an extended position, in which part of the retaining means and the complete bunch of keys project outside the wallet, the wallet is designed such that it can be in the closed position both if the retaining means are in the retracted position and the retaining means and the bunch of keys are completely inside the wallet, and in the extended position and part of the retaining means and the complete bunch of keys are outside the wallet. ### Claim 22 (depends on 19) Wallet according to claim 19, at least one of the shell elements has a first area allowing temporary outward bulging by elastic deformation of the membrane material, which area is delimited, completely circumferentially, by rigid boundaries, such that said area immediately springs back into the initial unloaded state at the time the bulging load is removed. ### Claim 23 (depends on 21) Wallet according to claim 21, wherein the wallet is designed such that the assembly of retaining means and bunch of keys is allowed to move between the retracted and extended position merely when the wallet is in an open position. ### Claim 24 (depends on 19) Wallet according to claim 19, wherein the membrane material provides an elastically resilient foil covering both shell elements and extending from the one shell element to the other shell element via the spine and being pre tensioned by at least 5% yield both in the closed and open position of the wallet such that both in the open and closed position of the wallet the pre tensioned membrane material biases the shell elements in the direction of moving from the closed to the open position of the wallet. ### Claim 25 (depends on 22) Wallet according to claim 22, at least one shell element comprises a plate metal space frame of rectangular shape which provides the boundary edges of the shell element and also provides the external boundaries of a single window of said shell element which window provides said first area and is covered by said membrane material such that the wallet has rigid wallet boundary edges and has main faces that, in the area of the window, can be outwardly bulged by bulky contents within the closed wallet. ### Claim 26 (depends on 24) Wallet according to claim 24, the foil is fixedly attached to the first longitudinal boundary edges of the shell elements that are located opposite the second longitudinal boundary edges that are hingedly connected at the spine and the foil lays loose at the other boundary edges of the shell elements. ### Claim 27 (depends on 19) Wallet according to claim 19, wherein the membrane material has a rectangular shape, is pre tensioned such that it is elastically yielded for at least 10%, is wrinkle free, is easy pleatable and foldable, and has a dimension in the direction parallel to the orientation of the pivot axis, which orientation is parallel to the first and second longitudinal boundary edges of the shell elements, equal to or not more than the dimension of the shell element in the same orientation. ### Claim 28 (depends on 19) Wallet according to claim 19, the membrane material provides a foil that allows an elastic yield of at least 100% and provides an elastic bias of at least 0.5 Newton and not more than 5 Newton for 1 millimeter yield for a sheet of 100 millimeter length and 100 millimeter width, the foil thickness is at least 0.25 and not more than 1.7 millimeter, the foil allows an elastic yield in the one direction parallel to the face of the foil that is at least 50% different from the elastic yield in the perpendicular direction parallel to the face of the foil, such that the foil has an anisotropic yield behavior, wherein the direction in which the foil allows lowest yield is parallel to the wallet pivot axis and the foil is braided from elastic yielding yarns. ### Claim 29 (depends on 19) Wallet according to claim 19, wherein the membrane material is braided from elastic yielding yarns. ### Claim 30 (depends on 19) Wallet according to claim 19, provided with a mechanical stop associated with the spine to limit the opening angle of the shell elements to less than 90 degrees. ### Claim 31 (depends on 19) Wallet according to claim 19, the spine provides a hinge which is shaft less and the shell elements have second longitudinal boundary edges at the hinge shaped such that they have mutual form fit to allow the pivoting movement of the shell elements at the spine and the second longitudinal boundary edges have a loose mutual engagement at the spine and are kept in mutual engagement and are kept pressed against each other, while fitting into each other, by the bias of the pre tensioned membrane material. ### Claim 32 (depends on 25) Wallet according to claim 25, containing a bunch of metal house door keys providing a stack thicker than the thickness of the empty, closed wallet, wherein when hand held, the closed wallet feels solid while at the same time a main face can be squeezed like a sponge by the finger tips and the enclosed keys can be sensed through the main face while the solid sense is due to the fixed length and width and thickness provided by the rigid wallet boundary edges while the wallet in the empty, closed position provides the image of a container having flat and smooth main faces, while when packed with said bunch of keys one or both main faces are bulged outward and the foil is such that, when the wallet is packed with said stack of keys, the foil obtains a relief making the bunch of keys visible through the foil by a coining or embossing effect of the foil by the keys. ### Claim 33 (depends on 21) Wallet according to claim 21, wherein a to the retaining means connected bunch of keys is absent. ### Claim 34 (depends on 19) Wallet according to claim 19, having a length, parallel to the first and second longitudinal boundary edge, between 80 and 120 millimeter, a width, perpendicular to the first and second longitudinal boundary edge, between 30 and 60 millimeter and a thickness between 5 and 30 millimeter, if unloaded and closed. ### Claim 35 (depends on 21) Wallet according to claim 21 wherein the wallet is designed such that, starting from the closed position, the wallet is held in a single hand and an operating button of the wallet is operated by a finger of said hand such that a lock is released such that shell elements of the wallet, by the bias of the foil, automatically pivot to the open wallet position and are kept in said position by continued bias of the foil and then the retaining means are moved from the retracted to the extended position such that the retaining means and also the keys associated with the retaining means are brought outside the wallet and then, while the retaining means and its associated keys remain outside the wallet, the wallet is closed by moving the shell elements against the bias of the foil by squeezing the shell elements together by action of the fingers of said single hand wherein the pre tension of the foil increases at least 2.5% while moving from the opened to the closed position of the wallet. ### Claim 36 (depends on 35) Wallet according to claim 35, wherein the wallet is designed such that the retaining means are moved to the extended position by a wrist movement of said single hand while the wallet is in the open position. ### Claim 37 Wallet, having four wallet boundary edges, which wallet is provided by two opposite main faces, two opposite long minor faces and two opposite short minor faces, wherein the long and short minor faces provide the wallet thickness and a long minor face meets a short minor face at an angle of 90 degrees, the wallet further comprising two shell elements which are associated by connection means at a spine of the wallet in such a manner that they can pivot relative to one another around a pivot axis at the spine such that a first longitudinal boundary edge of the one shell element, can move away from the 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, providing an enveloping skin as external surface of the wallet, 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, both if the wallet is open and closed, and each shell element provides a main face of the wallet, wherein the membrane material allows an elastic yield of at least 20%, in the closed position the wallet provides an elongated sleeve like shape, in the completely open position of the wallet the shell elements make a mutual angle of at least 45 degrees and less than 120 degrees, the shell elements are merely connected to each other along a second longitudinal boundary edge, also providing a hinged connection providing a rigid spine, the wallet contains a bunch of metal house door keys, which bunch is anchored to the wallet by retaining means, which retaining means can move between a retracted position, in which the retaining means and the bunch of keys are completely within the wallet, and an extended position, in which part of the retaining means and the complete bunch of keys project outside the wallet, the membrane material provides an elastically resilient foil covering both shell elements and extending from the one shell element to the other shell element via the spine and being pre tensioned by at least 5% yield both in the closed and open position of the wallet such that both in the open and closed position of the wallet the pre tensioned membrane material biases the shell elements in the direction of moving from the closed to the open position of the wallet, each shell element comprises a rigid space frame of rectangular shape in the shape of a cadre which provides the boundary edges of the shell element and also provides the external boundaries of an opening of said shell element which opening is covered by said membrane material such that the wallet has rigid wallet boundary edges and has main faces that, at the area within the opening, can be outwardly bulged by bulky contents within the closed wallet by elastic yield of the membrane material, and which opening makes at least 50% of the surface area of the shell element, the wallet is provided with a mechanical stop associated with the spine to limit the opening angle of the shell elements to less than 120 degrees, against the bias of the foil, the wallet has a length, measured parallel to the first and second longitudinal boundary edge, between 80 and 120 millimeter, a width, measured perpendicular to the first and second longitudinal boundary edge, between 30 and 60 millimeter and a thickness between 5 and 30 millimeter, the pre tension of the foil increases at least 2.5% while moving from the opened to the closed position of the wallet and the foil is easy elastically pleatable and foldable and provides flat main faces of the wallet in its open and closed position in the area where the foil covers the opening, the wallet is designed such that, in the closed position of the wallet, both long minor faces are tight such that they do not allow a key to pass while a short minor face delimits an opening of at least 2 millimeter for a key to pass, and the wallet is provided with a releasable lock to keep the wallet in the closed position by locking the shell elements to each other against the bias of the membrane material and is provided with releasing means for unlocking the lock to release the shell elements. ### Claim 38 (depends on 37) Wallet according to claim 37, the membrane material provides a foil that allows an elastic yield of at least 100% and provides an elastic bias of at least 0.5 Newton for 1 millimeter yield for a sheet of 100 millimeter length and 100 millimeter width, the foil thickness is at least 0.25 and not more than 1.7 millimeter.