# US 10,767,404 B2 · Four-bar linkage hinge > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,767,404 B2 - Document ID: US10767404B2 - Status: Granted - Kind: B2 - Application number: 15/885,441 - Filed: 2018-01-31 - Published: 2018-08-02 - Granted: 2020-09-08 - Earliest claimed: 2017-01-31 - Assignees: Hartwell Corporation - Applicants: Hartwell Corporation - Inventors: Brandon L. Spoelstra; Michael A. Grande - Web page: https://patentgrep.com/patent/US10767404B2 ## CPC - E05D 7/00: Hinges or pivots of special construction (used for special suspension arrangements E05D15/00; so as to be self-closing E05F1/06, E05F1/12; with means for raising wings before being turned E05F7/02) - B64D 29/08: Inspection panels for power plants - E05D 3/06: with two or more pins (E05D7/08 takes precedence) - E05D 3/14: with four parallel pins and two arms - E05D 5/06: Bent flaps - E05F 1/1207: {with a coil spring parallel with the pivot axis} - E05D 2005/067: {gooseneck shaped} - E05F 1/1215: {with a canted-coil torsion spring} - E05Y 2201/484: Torsion springs - E05Y 2900/502: for aircraft or spacecraft - E05D: HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS (pivotal connections in general F16C11/00) - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING - E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF ## Abstract A hinge is coupled to a first component and a second component. The hinge supports the second component for movement relative to the first component between a closed position covering an opening through the first component and an opened position displaced from the opening. The hinge includes a first bracket coupled to the second component, a second bracket coupled to the first component, a support link coupled to the first and second brackets, and a control link coupled to the first and second brackets. Rotation of the support link relative to the first bracket causes rotation of the first component relative to the second component and relative to the support link. ## Claims ### Claim 1 A four-bar linkage hinge comprising: a first bracket including a base and a pair of spaced apart flanges extending outward from the base to define a channel therebetween; a second bracket spaced apart from the first bracket; a support link coupled to the first bracket for rotation about a first axis and coupled to the second bracket for rotation about a second axis; at least one control link coupled to the first bracket for rotation about a third axis and coupled to the second bracket for rotation about a fourth axis; and a spring, wherein the first, second, third, and fourth axes are spaced apart from one another such that rotation of the support link relative to the first bracket causes rotation of the second bracket relative to the first bracket and relative to the support link, wherein at least a portion of the support link is received in the channel, and wherein at least a portion of the at least one control link is positioned along one of the flanges outside of the channel, and wherein the spring is received in the channel, the spring is engaged with the first bracket and the support link, and the spring is configured to bias the support link relative to the first bracket. ### Claim 2 (depends on 1) The four-bar linkage hinge of claim 1, wherein the support link and the at least one control link each include a first arm and a spaced apart second arm coupled together by a neck, wherein the first arms are coupled to the first bracket and the second arms are coupled to the second bracket. ### Claim 3 (depends on 1) The four-bar linkage hinge of claim 1, wherein the second bracket includes a base and a column extending outward from the base, and wherein a slot is formed at an opposing end of the column from the base. ### Claim 4 (depends on 3) The four-bar linkage hinge of claim 3, wherein at least a portion of the support link is received in the slot, and wherein at least a portion of the at least one control link is positioned along the column outside of the slot. ### Claim 5 (depends on 4) The four-bar linkage hinge of claim 4, wherein the at least one control link includes a first control link and a second control link, wherein each of the first and second control links is coupled to the first bracket for rotation about the third axis and coupled to the second bracket for rotation about the fourth axis, wherein at least a portion of the first control link is positioned along one of the flanges of the first bracket outside of the channel and at least a portion of the second control link is positioned along the other of the flanges of the first bracket outside of the channel opposite from the first control link, and wherein at least a portion of the first control link is positioned along the column of the second bracket outside of the slot and at least a portion of the second control link is positioned along the column of the second bracket outside of the slot opposite from the first control link. ### Claim 6 A four-bar linkage hinge for use in supporting a first component for movement relative to a second component between a closed position covering an opening through the second components and an opened position displaced from the opening, the four-bar linkage hinge comprising: a first bracket coupled to the second component, the first bracket including a base and a pair of spaced apart flanges extending outward from the base to define a channel therebetween; a second bracket coupled to the first component and spaced apart from the first bracket with the first component in the closed position; a support link coupled to the first bracket for rotation about a first axis and coupled to the second bracket for rotation about a second axis, at least a portion of the support link received in the channel; and first and second control links, each of the first and second control link coupled to the first bracket for rotation about a third axis and coupled to the second bracket for rotation about a fourth axis, at least a portion of the first control link positioned along one of the flanges of the first bracket outside of the channel and at least a portion of the second control link positioned along the other of the flanges of the first bracket outside of the channel opposite from the first control link, wherein the first, second, third, and fourth axes are spaced apart from one another such that rotation of the support link relative to the first bracket causes rotation of the first component relative to the second component and relative to the support link. ### Claim 7 (depends on 6) The four-bar linkage hinge of claim 6, wherein the support link and the first and second control links each include a first arm and a spaced apart second arm coupled together by a neck, wherein the first arms are coupled to the first bracket and the second arms are coupled to the second bracket. ### Claim 8 (depends on 6) The four-bar linkage hinge of claim 6, wherein the second bracket includes a base and a column extending outward from the base, and wherein a slot is formed at an opposing end of the column from the base. ### Claim 9 (depends on 8) The four-bar linkage hinge of claim 8, wherein at least a portion of the support link is received in the slot, and wherein at least a portion of the first control link is positioned along the column of the second bracket outside of the slot and at least a portion of the second control link is positioned along the column of the second bracket outside of the slot opposite from the first control link. ### Claim 10 (depends on 9) The four-bar linkage hinge of claim 9, wherein a spring is engaged with the first bracket and the support link and configured to bias the first component toward the opened position. ### Claim 11 (depends on 10) The four-bar linkage hinge of claim 10, wherein the spring is received in the channel. ### Claim 12 (depends on 6) The four-bar linkage hinge of claim 6, wherein rotation of the support link relative to the first bracket by 70 degrees to 80 degrees results in a rotation of the first component through an angle of 160 degrees to 180 degrees from the closed position to the opened position. ### Claim 13 An airframe comprising: a body panel; an access door; and a four-bar linkage hinge coupled to the body panel and to the access door, the four-bar linkage hinge configured to support the access door for movement relative to the body panel between a closed position covering an opening through the body panel and an opened position displaced from the opening, the four-bar linkage hinge comprising: a first bracket coupled to the body panel, the first bracket including a base and a pair of spaced apart flanges extending outward from the base to define a channel therebetween; a second bracket coupled to the access door and spaced apart from the first bracket with the access door in the closed position; a support link coupled to the first bracket for rotation about a first axis and coupled to the second bracket for rotation about a second axis, at least a portion of the support link received in the channel; and first and second control links, each of the first and second control link coupled to the first bracket for rotation about a third axis and coupled to the second bracket for rotation about a fourth axis, at least a portion of the first control link positioned along one of the flanges of the first bracket outside of the channel and at least a portion of the second control link positioned along the other of the flanges of the first bracket outside of the channel opposite from the first control link, wherein the first, second, third, and fourth axes are spaced apart from one another such that rotation of the support link relative to the first bracket causes rotation of the access door relative to the body panel and relative to the support link. ### Claim 14 (depends on 13) The airframe of claim 13, wherein the second bracket includes a base and a column extending outward from the base, wherein a slot is formed at an opposing end of the column from the base, wherein at least a portion of the support link is received in the slot, and wherein at least a portion of the first control link is positioned along the column of the second bracket outside of the slot and at least a portion of the second control link is positioned along the column of the second bracket outside of the slot opposite from the first control link. ### Claim 15 (depends on 14) The airframe of claim 14, wherein a spring is received in the channel of the first bracket, and wherein the spring is engaged with the first bracket and the support link and configured to bias the access door toward the opened position. ### Claim 16 (depends on 13) The airframe of claim 13, wherein rotation of the support link relative to the first bracket by 70 degrees to 80 degrees results in a rotation of the access door through an angle of 160 degrees to 180 degrees from the closed position to the opened position.