# US 7,408,104 B2 · Pedal device for drum > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,408,104 B2 - Document ID: US7408104B2 - Status: Granted - Kind: B2 - Application number: 11/234,449 - Filed: 2005-09-23 - Published: 2007-01-11 - Granted: 2008-08-05 - Earliest claimed: 2005-07-08 - Assignees: Hoshino Gakki Mfg. Co., Ltd. - Inventors: Naoki Sato - Web page: https://patentgrep.com/patent/US7408104B2 ## CPC - G10D 13/11: Pedals; Pedal mechanisms - 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 pedal device for a drum includes a base plate, a pedal, a chain, a pivot shaft, a beater, and an extension coil spring. When the pedal is freed from a depressed state, the urging force of the extension coil spring returns the beater from an operation position to a suspended position and returns the pedal to a standby position. A compression coil spring is arranged between the pedal and the base plate. ## Claims ### Claim 1 A pedal device used to play a drum, the pedal device comprising: a base; a beater pivotally supported by the base and configured to pivot between an operation position for beating the drum and a suspended position separated from the drum; a pedal pivotally supported by the base and configured to operate the beater, the pedal being located at a standby position that is separated from the base when in a free state and being located at a position that is close to the base when in a depressed state; a connection member configured to connect the pedal and the beater; a first urging member configured to hold the beater at the suspended position and the pedal at the standby position when the pedal is in the free state, the beater being positioned and configured to be pivoted from the suspended position to the operation position against an urging force of the first urging member when the pedal is depressed, the urging force of the first urging member returning the beater to the suspended position from the operation position and the pedal to the standby position when the pedal is freed from the depressed state; and a second urging member attached to the base and configured to urge the pedal away from the base by adding a second urging force in an auxiliary manner to the urging force of the first urging member when the beater returns to the suspended position, wherein the second urging force of the second urging member is smaller than a load produced by the pedals, the base being configured such that the second urging member is slidable along a longitudinal direction of the base to adjust a longitudinal position of the second urging member to control the second urging force. ### Claim 2 (depends on 1) The pedal device according to claim 1, wherein the second urging member is positioned between the base and the pedal and is configured to apply the urging force to the pedal and to move the pedal away from the base when the beater is located at the operation position. ### Claim 3 (depends on 1) The pedal device according to claim 1, wherein the second urging member is spaced from the pedal when the pedal is located at the standby position. ### Claim 4 (depends on 3) The pedal device according to claim 3, wherein the first urging member is an extension coil spring, and the second urging member is a compression coil spring. ### Claim 5 (depends on 4) The pedal device according to claim 4, wherein the compression coil spring has an axis that is perpendicular to the pedal when the beater is located at the operation position. ### Claim 6 (depends on 5) The pedal device according to claim 5, wherein the compression coil spring has a lower end attached to the base and an upper end spaced from the pedal when the pedal is in the free state. ### Claim 7 (depends on 6) The pedal device according to claim 6, wherein the upper end of the compression coil spring faces toward a middle part of the pedal with respect to a longitudinal direction of the pedal. ### Claim 8 (depends on 6) The pedal device according to claim 6, wherein the compression coil spring is detachably attached to the base. ### Claim 9 (depends on 6) The pedal device according to claim 6, wherein the upper end of the compression coil spring faces toward a middle part of the pedal with respect to a lateral direction of the pedal. ### Claim 10 (depends on 6) The pedal device according to claim 6, wherein an absorber is arranged on the pedal at a position facing toward the upper end of the compression coil spring. ### Claim 11 (depends on 6) The pedal device according to claim 6, wherein an absorber is attached to the compression coil spring so as to cover the upper end of the compression coil spring. ### Claim 12 (depends on 1) In combination the pedal device used to play the drum according to claim 1, and the drum. ### Claim 13 (depends on 1) The pedal device according to claim 1, further comprising an absorber positioned on the second urging member. ### Claim 14 (depends on 1) The pedal device according to claim 1, the base comprising an elongate hole configured to receive a fastening member for securing the second urging member to the base such that the second urging member is adjustable in the longitudinal position by sliding the fastening member in the elongate hole.