# US 10,770,039 B1 · Drop tuner > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,770,039 B1 - Document ID: US10770039B1 - Status: Granted - Kind: B1 - Application number: 16/559,634 - Filed: 2019-09-04 - Granted: 2020-09-08 - Earliest claimed: 2019-09-04 - Assignees: Meister Works, Inc. - Applicants: Meister Works, Inc. - Inventors: Shinjiro Hirayama - Web page: https://patentgrep.com/patent/US10770039B1 ## CPC - G10D 3/147: Devices for altering the string tension during playing - G10D 1/085: {Mechanical design of electric guitars} - G10D 3/12: Anchoring devices for strings, e.g. tail pieces or hitchpins - G10D 3/14: Tuning devices, e.g. pegs, pins, friction discs or worm gears - 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) ## Abstract A drop tuner of the present invention has: a lock screw projected from a main saddle which is rotatably supported by the drop tuner; and a base body supported by the lock screw so as to be capable of being inserted between the lock screw and a fine tuning screw and separated from the fine tuning screw, wherein a rotation angle of the main saddle varies when the base body is switched between an inserted state and a separated state, and a fin member projected toward a radial direction of the lock screw is provided on the base body near an end portion farther from the main saddle. ## Claims ### Claim 1 A drop tuner, comprising: a lock screw projected from a main saddle which is rotatably supported by the drop tuner; and a base body supported by the lock screw so as to be capable of being inserted between the lock screw and a fine tuning screw and separated from the fine tuning screw, wherein a rotation angle of the main saddle varies when the base body is switched between an inserted state and a separated state, and a fin member projected toward a radial direction of the lock screw is provided on the base body near an end portion farther from the main saddle. ### Claim 2 (depends on 1) The drop tuner according to claim 1, wherein the fin member is projected toward a surface of a guitar on which the drop tuner is installed or projected upward of the guitar on which the drop tuner is installed. ### Claim 3 (depends on 1) The drop tuner according to claim 1, wherein the fin member has a surface of approximately perpendicular to the lock screw at the main saddle side of the fin member, and the fin member has an inclined surface approaching the lock screw as separated from the main saddle at an opposite side of the main saddle side of the fin member. ### Claim 4 (depends on 1) The drop tuner according to claim 1, wherein the base body extends in a longitudinal direction of the lock screw, the base body has a body part which is substantially penetrated by the lock screw and supported by the lock screw at the end portion farther from the main saddle and another end portion nearer to the main saddle, the end portion of the body part farther from the main saddle has a long hole shape so that the body part can be approached to the lock screw and separated from the lock screw, and a shift amount adjust screw is provided to penetrate the body part and screwed to the body part to project toward an axis of the lock screw. ### Claim 5 (depends on 1) The drop tuner according to claim 1, wherein the fine tuning screw is screwed to a bridge baseplate which extends in a longitudinal direction of the lock screw to penetrate the bridge baseplate, the fine tuning screw is supported by the bridge baseplate to abut an axis of the lock screw, another end portion of the base body nearer to the main saddle abuts the bridge baseplate, and the another end portion has an inclined surface so that a part of the base body can be moved toward the lock screw side. ### Claim 6 (depends on 1) The drop tuner according to claim 1, wherein the base body has a positioning protrusion which abuts on an end portion of the bridge baseplate to function as a positioning member when the base body is inserted between the bridge baseplate and the lock screw and contacted with the fine tuning screw. ### Claim 7 (depends on 6) The drop tuner according to claim 6, wherein the shift amount adjust screw is screwed to an opposite side of the main saddle with respect to the positioning protrusion. ### Claim 8 (depends on 1) The drop tuner according to claim 1, wherein the base body has an approximately U-shape in cross-section, and the base body is arranged so that the fine tuning screw side of the lock screw is surrounded by the base body and an opposite side is open. ### Claim 9 (depends on 1) The drop tuner according to claim 1, wherein a pivot point is located at the main saddle side with respect to an action point of a shift amount adjust screw. ### Claim 10 (depends on 1) The drop tuner according to claim 1, wherein an axis line of the shift amount adjust screw is arranged to cross the axis line of the lock screw. ### Claim 11 (depends on 1) The drop tuner according to claim 1, wherein an axis line of the shift amount adjust screw is arranged on a center surface of the base body.