# US 11,443,722 B2 · Foldable stringed instrument > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,443,722 B2 - Document ID: US11443722B2 - Status: Granted - Kind: B2 - Application number: 17/471,287 - Filed: 2021-09-10 - Published: 2021-12-30 - Granted: 2022-09-13 - Earliest claimed: 2017-10-19 - Assignees: Ciari Guitars, Inc. - Applicants: Ciari Guitars, Inc. - Inventors: Jonathan D Spangler; James Coleman Lee; Matthew Poster; Jesse Darley; Elliot Sather - Web page: https://patentgrep.com/patent/US11443722B2 ## CPC - G10D 1/08: Guitars - G10D 1/085: {Mechanical design of electric guitars} - G10D 3/04: Bridges - G10D 3/06: Necks; Fingerboards, e.g. fret boards - G10D 3/095: Details of removable or collapsible necks, e.g. suitable for transport or storage - G10D 3/12: Anchoring devices for strings, e.g. tail pieces or hitchpins - G10H 1/32: Constructional details - G10H 3/18: using a string, e.g. electric guitar {(mechanical features G10D1/085)} - G10H 3/181: {Details of pick-up assemblies} - G10D 3/10: Strings - G10D 3/14: Tuning devices, e.g. pegs, pins, friction discs or worm gears - G10H 2210/211: Pitch vibrato, i.e. repetitive and smooth variation in pitch, e.g. as obtainable with a whammy bar or tremolo arm on a guitar - G10D: STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR (organs, harmoniums or similar wind musical instruments with associated blowing apparatus G10B; pianos, harpsichords, spinets or similar stringed musical instruments with one or more keyboards G10C; automatic musical instruments G10F; electrophonic musical instruments in which tones are generated by electromechanical means G10H) - G10H: ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE ## Abstract A foldable stringed instrument, for example in the form of a travel guitar that folds mid-neck to assume a reduced profile is described. The mid-neck folding is accomplished in a symmetrical manner about a three-part hinge located in the neck to configure the travel guitar into a reduced profile. The bridge assembly can be translated longitudinally relative to the head of the guitar to allow sufficient detensioning of the guitar strings to enable an upper portion of the neck to be folded away from a lower portion of the neck and/or body to assume a reduced profile. To deploy the travel guitar for playing, the upper portion of the neck is unfolded into alignment with the lower portion of the neck and/or body, and the bridge assembly translated longitudinally relative to the head and locked in position to allow the guitar to be tuned for playing. ## Claims ### Claim 1 A foldable stringed instrument, comprising: a body assembly including a bridge, a string roller assembly, and a translating tail piece all mounted to a body, wherein said translating tail piece is dimensioned to engage a plurality of strings; and a neck assembly having a hinge assembly, a neck coupled to said hinge assembly having a plurality of tuning machines dimensioned to engage said plurality of strings, and a multi-part fingerboard mounted to said neck and said hinge assembly; wherein said hinge assembly includes a base section, an upper section, and a middle section hingedly coupled to said base section and said upper section so as to enable said neck assembly to be selectively straightened and folded. ### Claim 2 (depends on 1) The foldable stringed instrument of claim 1, wherein said body includes an upper surface, a lower surface, and a recess formed in said lower surface, wherein said bridge is mounted to said upper surface, and wherein said string roller assembly and said translating tail piece are mounted within said recess formed in said lower surface. ### Claim 3 (depends on 1) The foldable stringed instrument of claim 1, wherein said translating tail piece is operable to be selectively moved along a longitudinal axis of said body in a first direction to tension said strings while said neck assembly is straightened and a second direction opposite to said first direction to detension said strings to enable folding said neck assembly. ### Claim 4 (depends on 1) The foldable stringed instrument of claim 1, wherein said base section, said middle section, and said upper section of said hinge assembly each has a generally flat upper surface and a curved lower surface, wherein said generally flat upper surfaces are dimensioned to be generally co-aligned when said neck assembly is straightened. ### Claim 5 (depends on 1) The foldable stringed instrument of claim 1, wherein said hinge assembly enables said neck to be folded approximately 180 degrees relative to said body. ### Claim 6 (depends on 1) The foldable stringed instrument of claim 1, wherein said translating tail piece is movable relative to a longitudinal axis of said body along at least one elongated member positioned along said longitudinal axis of said body. ### Claim 7 (depends on 1) The foldable stringed instrument of claim 1, further comprising at least one locking element dimensioned to lock said hinge assembly when said neck assembly is straightened and to unlock said hinge assembly to enable folding said neck assembly. ### Claim 8 (depends on 1) The foldable stringed instrument of claim 1, further including a lever configured to selectively lock and unlock said translating tail piece, wherein when locked said translating tail piece applies tension to said strings for playing, and wherein when unlocked said translating tail piece removes tension from said strings to enable folding said neck assembly. ### Claim 9 (depends on 1) The foldable stringed instrument of claim 1, further including a mounting plate disposed within a recess formed within said body, said mounting plate dimensioned to mount said siring roller assembly and said translating tail piece to said body. ### Claim 10 (depends on 1) The foldable stringed instrument of claim 1, wherein said body and said neck assembly combine to comprise at least one of an electric guitar, an acoustic guitar, a bass guitar, and a ukulele. ### Claim 11 A foldable stringed instrument, comprising: a neck assembly having a hinge assembly, a neck coupled to said hinge assembly, and a multi-part fingerboard mounted to said neck and said hinge assembly, wherein said hinge assembly includes a base section, an upper section, and a middle section hingedly coupled to said base section and said upper section so as to enable said neck assembly to be selectively straightened and folded; a nut positioned at a first location relative to said multi-part fingerboard, said nut dimensioned to hold a plurality of strings a distance off said multi-part fingerboard when said neck assembly is straightened; a bridge positioned at a second location relative to said multi-part fingerboard, said bridge dimensioned to hold said plurality of strings a distance off said multi-part fingerboard when said neck assembly is straightened; and a translating tail piece dimensioned to be selectively moved in a first direction to tension said plurality of strings when said neck assembly is straightened and selectively moved in a second direction opposite said first direction to detension said plurality of strings to enable folding said neck assembly. ### Claim 12 (depends on 11) The foldable stringed instrument of claim 11, wherein said base section, said middle section, and said upper section of said hinge assembly each has a generally flat upper surface and a curved lower surface, wherein said generally flat upper surfaces are dimensioned to be generally co-aligned when said neck assembly is straightened. ### Claim 13 (depends on 11) The foldable stringed instrument of claim 11, wherein said base section of said hinge assembly is operable to be folded approximately 180 degrees relative to said upper section of said hinge assembly. ### Claim 14 (depends on 11) The foldable stringed instrument of claim 11, wherein said translating tail piece is movable in said first direction and said second direction along at least one elongated member. ### Claim 15 (depends on 11) The foldable stringed instrument of claim 11, further comprising at least one locking element dimensioned to lock said hinge assembly when said neck assembly is straightened and to unlock said hinge assembly to enable folding said neck assembly. ### Claim 16 (depends on 11) The foldable stringed instrument of claim 11, further comprising a lever configured to selectively lock and unlock said translating tail piece, wherein when locked said translating tail piece applies tension to said strings for playing, and wherein when unlocked said translating tail piece removes tension from said strings to enable folding said neck assembly. ### Claim 17 (depends on 11) The foldable stringed instrument of claim 11, further comprising a body coupled to said neck assembly. ### Claim 18 (depends on 17) The foldable stringed instrument of claim 17, wherein said body and said neck assembly combine to comprise at least one of an electric guitar, an acoustic guitar, a bass guitar, and a ukulele. ### Claim 19 A foldable stringed instrument, comprising: a neck assembly having a hinge assembly, a neck coupled to said hinge assembly, and a multi-part fingerboard mounted to said neck and said hinge assembly, wherein said hinge assembly includes a base section, an upper section, and a middle section hingedly coupled to said base section and said upper section so as to enable said neck assembly to be selectively straightened and folded. ### Claim 20 (depends on 19) The foldable stringed instrument of claim 19, further comprising: a translating tail piece dimensioned to be selectively moved in a first direction to tension a plurality of strings extending between a nut and a bridge when said neck assembly is straightened and selectively moved in a second direction opposite said first direction to detension said plurality of strings to enable folding said neck assembly.