# US 7,607,202 B1 · Hinge with multiple strength-enhanced resilient flat washers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,607,202 B1 - Document ID: US7607202B1 - Status: Granted - Kind: B1 - Application number: 12/122,675 - Filed: 2008-05-17 - Published: 2009-11-19 - Granted: 2009-10-27 - Earliest claimed: 2008-05-17 - Assignees: Shin Zu Shing Co., Ltd. - Inventors: Chung-Yu Lee - Web page: https://patentgrep.com/patent/US7607202B1 ## CPC - G06F 1/1681: {Details related solely to hinges (hinge details related to the transmission of signals or power are classified in G06F1/1683)} - G06F 1/1616: {with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position} - E05D 11/087: {with substantially axial friction, e.g. friction disks} - E05Y 2999/00: Subject-matter not otherwise provided for in this subclass - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - E05D: HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS (pivotal connections in general F16C11/00) - 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 has a stationary leaf, multiple resilient flat washers and a pintle. The stationary leaf has a sleeve. The resilient flat washers are mounted in the sleeve and each resilient flat washer has a ring and a key wing. The ring has a receiving recess formed in a first surface and a mounting rib formed in a second surface. The receiving recess of each resilient flat washer engages the mounting rib of a corresponding resilient flat washer. With the engagements of the receiving recesses and the mounting ribs, the resilient flat washers are connected to each other to enhance the strength of the resilient flat washers. Therefore, the resilient flat washers are strong enough to bear the abrasion for long term use. ## Claims ### Claim 1 A hinge comprising: a stationary leaf having a body having a side; and an elongated keyway being formed longitudinally in the side of the body; and a sleeve being formed on the side of the body, communicating with the elongated keyway; multiple resilient flat washers being mounted in the sleeve and being mounted securely in the body, and each resilient flat washer having a ring being mounted in the sleeve and having a first surface; a second surface being opposite to the first surface; an inner annular edge; an outer annular edge; a gap being formed through the inner and outer annular edges; a receiving recess being formed annularly in the first surface; and a mounting rib formed annularly on the second surface, wherein the receiving recess of the ring of each resilient flat washer engages the mounting rib of the ring of a corresponding resilient flat washer; and a key wing being formed on and protruding transversely from the outer annular edge of the ring, being mounted securely in the keyway of the stationary leaf and having a first surface; a second surface being opposite to the first surface of the key wing; two sides; a receiving recess being formed in the first surface of the key wing; and a mounting rib being formed on the second surface of the key wing, wherein the receiving recess of the key wing of each resilient flat washer engages the mounting rib of the key wing of a corresponding resilient flat washer; and a pintle being mounted rotatably in the rings of the resilient flat washers. ### Claim 2 (depends on 1) The hinge as claimed in claim 1, wherein the first surface of the key wing of each resilient flat washer corresponds to the first surface of the ring of the resilient flat washer; the receiving recess of the key wing of each resilient flat washer communicates with the receiving recess of the ring of the resilient flat washer; and the mounting rib of the key wing of each resilient flat washer is connected to the mounting rib of the ring of the resilient flat washer. ### Claim 3 (depends on 2) The hinge as claimed in claim 2, wherein the ring of each resilient flat washer further has multiple abrasion protrusions being formed separately on and protruding transversely from the inner annular edge of the ring, and each abrasion protrusion having an outer surface; and multiple teeth being formed on the outer surface of the abrasion protrusion. ### Claim 4 (depends on 3) The hinge as claimed in claim 3, wherein the key wing of each resilient flat washer is adjacent to the gap of the ring of the resilient flat washer. ### Claim 5 (depends on 4) The hinge as claimed in claim 4, wherein the elongated keyway of the stationary leaf is a cross in cross section; and the key wing of each resilient flat washer has two keyed protrusions being formed respectively on the sides of the key wing and engaging the elongated keyway of the stationary leaf. ### Claim 6 (depends on 5) The hinge as claimed in claim 5, wherein the pintle has an enlarged head having an outside surface and an inside surface; a securing rod being formed on the outside surface of the enlarged head; and a pivoting rod being formed axially on and protruding out from the inside surface of the enlarged head, being mounted rotatably into the rings of the resilient flat washers. ### Claim 7 (depends on 6) The hinge as claimed in claim 6, wherein the sleeve of the stationary leaf further has two limiting stops being formed on and protruding out of opposite sides of the sleeve; and the hinge further comprises a limiting spacer being mounted securely on the pivoting rod of the pintle and having an edge; and a limiting protrusion being formed transversely on the edge of the limiting spacer and selectively abutting the limiting stops on the sleeve. ### Claim 8 (depends on 7) The hinge as claimed in claim 7, wherein the pintle further has a keyed fastening protrusion corresponding to the limiting stops on the sleeve and being formed between the inside surface of the enlarged head and the pivoting rod; and the limiting spacer has a keyhole engaging the fastening protrusion of the pintle. ### Claim 9 (depends on 3) The hinge as claimed in claim 3, wherein the key wing of each resilient flat washer is opposite to the gap of the ring of the resilient flat washer. ### Claim 10 (depends on 9) The hinge as claimed in claim 9, wherein the ring of each resilient flat washer further has multiple tightening knobs being formed separately on and protruding transversely out from the outer annular edge and abutting tightly the sleeve. ### Claim 11 (depends on 10) The hinge as claimed in claim 10, wherein the elongated keyway of the stationary leaf is a cross in cross section; and the key wing of each resilient flat washer has two keyed protrusions being formed respectively on the sides of the key wing and engaging the elongated keyway of the stationary leaf. ### Claim 12 (depends on 11) The hinge as claimed in claim 11, wherein the pintle has an enlarged head having an outside surface and an inside surface; a securing rod being formed on the outside surface of the enlarged head; and a pivoting rod being formed axially on and protruding out from the inside surface of the enlarged head, being mounted rotatably into the rings of the resilient flat washers. ### Claim 13 (depends on 12) The hinge as claimed in claim 12, wherein the sleeve of the stationary leaf further has two limiting stops being formed on and protruding out of opposite sides of the sleeve; and the hinge further comprises a limiting spacer being mounted securely on the pivoting rod of the pintle and having an edge; and a limiting protrusion being formed transversely on the edge of the limiting spacer and selectively abutting the limiting stops on the sleeve. ### Claim 14 (depends on 13) The hinge as claimed in claim 13, wherein the pintle further has a keyed fastening protrusion corresponding to the limiting stops on the sleeve and being formed between the inside surface of the enlarged head and the pivoting rod; and the limiting spacer has a keyhole engaging the fastening protrusion of the pintle. ### Claim 15 (depends on 1) The hinge as claimed in claim 1, wherein the ring of each resilient flat washer further has multiple abrasion protrusions being formed separately on and protruding transversely from the inner annular edge of the ring, and each abrasion protrusion having an outer surface; and multiple teeth being formed on the outer surface of the abrasion protrusion. ### Claim 16 (depends on 1) The hinge as claimed in claim 1, wherein the key wing of each resilient flat washer is adjacent to the gap of the ring of the resilient flat washer. ### Claim 17 (depends on 1) The hinge as claimed in claim 1, wherein the key wing of each resilient flat washer is opposite to the gap of the ring of the resilient flat washer. ### Claim 18 (depends on 1) The hinge as claimed in claim 1, wherein the elongated keyway of the stationary leaf is a cross in cross section; and the key wing of each resilient flat washer has two keyed protrusions being formed respectively on the sides of the key wing and engaging the elongated keyway of the stationary leaf. ### Claim 19 (depends on 1) The hinge as claimed in claim 1, wherein the pintle has an enlarged head having an outside surface and an inside surface; a securing rod being formed on the outside surface of the enlarged head; and a pivoting rod being formed axially on and protruding out from the inside surface of the enlarged head, being mounted rotatably into the rings of the resilient flat washers.