# US 8,769,873 B2 · Casement window with multi-angle locking window sash > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,769,873 B2 - Document ID: US8769873B2 - Status: Granted - Kind: B2 - Application number: 13/643,989 - Filed: 2010-04-26 - Published: 2013-05-02 - Granted: 2014-07-08 - Earliest claimed: 2010-04-26 - Assignees: Shenzhen Qichuangmei Technology Co., Ltd - Applicants: Lin Feng; Hoichi Leung; Lok Shun Leung - Inventors: Lin Feng; Hoichi Leung; Lok Shun Leung - Web page: https://patentgrep.com/patent/US8769873B2 ## CPC - E05D 7/06: to allow tilting of the members - E05C 17/28: with braking, clamping or securing means at the connection to the guide member - E05D 15/30: with pivoted arms and sliding guides - E05F 11/34: with screw mechanisms - G08B 3/00: Audible signalling systems, e.g. audible personal calling systems - E05Y 2400/66: Wireless transmission - E05Y 2800/00: Details, accessories and auxiliary operations not otherwise provided for - E05Y 2900/148: Windows - E05D: HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS (pivotal connections in general F16C11/00) - E05C: BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS (latching means for sideboard or tailgate structures for vehicles B62D, {B62D33/02}; fastening devices for constructional or engineering elements E04, F16B; locks, fastening devices structurally or operatively combined or having significant cooperation with locks E05B; means for operating or controlling wing fasteners in conjunction with mechanisms for moving the wing E05F) - 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 - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS - 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 casement window with multi-angle window sash includes a window frame (2) and a window sash (5). The window sash (5) is connected with the window frame (2) by a window hinge mechanical structure and a locking mechanism (7), wherein the mechanical structure of the window hinge includes a quadrilateral link mechanism (4), a movable sliding block (10), a gear (9), and a hinge seat (3); the locking mechanism (7) includes a screw rod (75) with an axial plane (78) and a thread (77). The screw rod (75) realizes the locking of the window sash (5) by meshing the thread (77) with the gear (9), and realizes the opening and closing of the window sash (5) by the axial plane (78). The casement window is simple in structure, low in cost, convenient to install and use, and provides high safety. ## Claims ### Claim 1 A casement window with multi-angle locking sash, comprising a window frame and a window sash, wherein said window sash accomplishes connecting with said window frame, and opening or closing by a window hinge mechanism and a locking mechanism, and said window sash is capable of locking at any angle with said window frame, wherein: said window hinge mechanism comprises a quadrilateral link mechanism, a movable sliding block, a gear and a hinge base, wherein said hinge base is fixed on said window frame, a concave sliding groove is provided on said hinge base, said movable sliding block is provided in said concave sliding groove, a wheel axle is provided on said movable sliding block, and said gear is provided on said wheel axle, wherein said quadrilateral link mechanism comprises a stationary swing rod, a movable swing rod, a link rod and a movable rod, wherein a first end of said stationary swing rod is hinged on said hinge base, a second end of said stationary swing rod is hinged on said movable rod, a first end of said link rod and a first end of said movable swing rod are hinged with said movable sliding block, a second end of said movable swing rod is hinged with said movable rod, a second end of said link rod is hinged with said stationary swing rod, wherein said movable rod is fixed with said window sash; said locking mechanism comprises a screw rod, an axial plane is provided on said screw rod, a screw thread is provided on a circumferential surface of said screw rod, two ends of said screw rod are respectively hinged on said hinge base via a stationary base, said screw rod accomplishes locking said window sash by engaging said screw thread with said gear on said movable sliding block, and said screw rod accomplishes opening or closing said window sash by rotating said axial plane corresponding to said gear on said movable sliding block. ### Claim 2 (depends on 1) The casement window with multi-angle locking sash, as recited in claim 1, wherein helical teeth are provided on said gear of said movable sliding block, a number of said helical teeth is the same with a modulus of said screw thread on said screw rod. ### Claim 3 (depends on 1) The casement window with multi-angle locking sash, as recited in claim 1, wherein springs are respectively provided between said two ends of said screw rod and said stationary bases. ### Claim 4 (depends on 1) The casement window with multi-angle locking sash, as recited in claim 1, wherein a rotating wrench for rotating said screw rod is provided on said screw rod. ### Claim 5 (depends on 1) The casement window with multi-angle locking sash, as recited in claim 1, wherein a first end of said screw rod is connected with a micro-switch, said micro-switch is connected with an alarming circuit, and a buzzer is provided on said alarming circuit. ### Claim 6 (depends on 5) The casement window with multi-angle locking sash, as recited in claim 5, wherein said alarming circuit comprises a solar panel, a high-capacity rechargeable capacitor or a high-capacity rechargeable battery, said micro-switch, an output terminal block, a reed switch and said buzzer, wherein said solar panel is connected with said high-capacity rechargeable capacitor or said high-capacity rechargeable battery to serve as a supplementary power, an output of a power is in series connection with said buzzer and connected with said micro-switch, said micro-switch not only turns said buzzer on but connects said output terminal block and said reed switch as well.