A sash lock (10) for a sash window assembly ( 12) is provided. The sash window assembly (12) includes an upper sash window (14) and a lower sash window (16), each of the sash windows (14), (16) mounted within opposed guide rails (18) on a master frame (20), wherein at least one of the sash windows (
A sash lock (10) for a sash window assembly ( 12) is provided. The sash window assembly (12) includes an upper sash window (14) and a lower sash window (16), each of the sash windows (14), (16) mounted within opposed guide rails (18) on a master frame (20), wherein at least one of the sash windows (14), (16) is slidable within the frame (20) relative to the other sash window (14), (16). The sash lock (10) of the present invention includes a keeper ( 22) adapted for mounting on one of the sash windows (14), ( 16). The keeper (22) includes a keeper surface. The sash lock (10) also includes a locking assembly (24) adapted for mounting on the other of the sash windows (14), (16). The locking assembly (24) comprises a housing (30) having an aperture (33), an actuator arm (32) rotatable between an unlocked position and a locked position and a cam (34) having a cam surface (40) for engaging the keeper surface. A shaft ( 35) is also provided extending through the aperture (33) and coupling the actuator arm (32) to the cam (34) such that the actuator arm (32) and cam (34) are rotatably mounted to the housing (30). A tab (44) mounted to the housing is also provided wherein the tab (44) engages the actuator arm (32) to retain the actuator arm (32) in its locked position.
대표청구항▼
We claim: 1. A sash lock for a sash window assembly, the sash window assembly including an upper sash window and a lower sash window, each of the sash windows mounted within opposed guide rails on a master frame, wherein at least one of the sash windows is slidable within the frame relative to the
We claim: 1. A sash lock for a sash window assembly, the sash window assembly including an upper sash window and a lower sash window, each of the sash windows mounted within opposed guide rails on a master frame, wherein at least one of the sash windows is slidable within the frame relative to the other sash window, the sash lock comprising: a keeper adapted for mounting on one of the sash windows, the keeper including a keeper surface; and a locking assembly adapted for mounting on the other of the sash windows, the locking assembly comprising: a cam supported by the other of the sash windows, the cam having a cam surface for engaging the keeper surface; an actuator arm rotatable between an unlocked position and a locked position; the actuator arm operably connected to the cam; a housing having an aperture; a shaft extending through the aperture and coupling the actuator arm to the cam such that the actuator arm and cam are rotatably supported by the housing; and a body integrally formed with the housing, the body having a tab having a first end mounted to the body and a second free end extending away from the first end wherein the tab confronts the actuator arm to retain the actuator in its locked position. 2. The sash lock of claim 1 wherein the tab has a deflected position to allow rotation of the actuator arm to the unlocked position. 3. The sash lock of claim 1 wherein the tab has a thumb button extending therefrom. 4. The sash lock of claim 1 wherein the tab has an engagement surface adapted to abut the actuator arm. 5. The sash lock of claim 1 wherein the tab has an engagement position wherein the tab abuts the actuator arm. 6. The sash lock of claim 5 wherein the tab has a deflected position wherein the actuator arm can rotate from the locked position to the unlocked position. 7. The sash lock of claim 6 wherein the tab has an inclined surface. 8. The sash lock of claim 7 wherein the actuator arm slides along the inclined surface when moving from the unlocked position to the locked position wherein the tab moves to the deflected position. 9. The sash lock of claim 8 where in the tab moves to the engagement position after the actuator arm moves past the tab. 10. A sash lock for a sash window assembly, the sash window assembly including an upper sash window and a lower sash window, each of the sash windows mounted within opposed guide rails on a master frame, wherein at least one of the sash windows is slidable within the frame relative to the other sash window, the sash lock comprising: a keeper adapted for mounting on one of the sash windows, the keeper including a keeper surface; and a locking assembly comprising: a housing having a housing mount hole adapted for receiving a fastener for fastening the housing to the other of the sash windows, the housing further having an aperture; a cam having a cam surface for engaging the keeper; an actuator arm rotatable between an unlocked position and a locked position; a shaft extending through the aperture and coupling the actuator arm to the cam such that the actuator arm and cam are rotatably supported by the housing; and an anti-rotation device having a base with a base mount hole adapted to receive the fastener, the body further having a tab integrally formed with the housing, the tab having a free end with a surface adapted to selectively engage the actuator arm to prevent rotation of the actuator arm from the locked position to the unlocked position, the tab further having a thumb button having a first end attached to the tab and a second end extending away from the tab. 11. The sash lock of claim 10 wherein the second end of the thumb button is curved. 12. The sash lock of claim 10 wherein the first end of the thumb button is attached to an underside of the tab. 13. A sash lock for a sash window assembly, the sash window assembly including an upper sash window and a lower sash window, each of the sash windows mounted within opposed guide rails on a master frame, wherein at least one of the sash windows is slidable within the frame relative to the other sash window, the sash lock comprising: a keeper adapted for mounting on one of the sash windows, the keeper including a keeper surface; and a locking assembly comprising: a fastener; a housing having a housing mount hole that receives the fastener to secure the housing to the other of the sash windows, the housing further having an aperture; a cam having a cam surface for engaging the keeper and located in an interior of the housing; an actuator arm rotatable between an unlocked position and a locked position; a shaft extending through the housing aperture and coupling the actuator arm to the cam such that the actuator arm and cam are rotatably supported by the housing; and an anti-rotation device having a base with a base mount hole cooperatively positioned with the housing mount hole to receive the fastener, the device further having a resiliently deflectable tab with an inclined free end extending from the base, the free end having a terminal end wall that selectively engages the actuator arm to prevent rotation of the actuator arm from the locked position to the unlocked position. 14. The sash lock of claim 13 wherein the tab further has a thumb button having a first end attached to the tab and a second end extending away from the tab, the base further being mounted to an exterior of the housing. 15. The sash lock of claim 13 wherein the end wall of the tab has a planar configuration, the end wall confronting a portion of the actuator arm in the locked position. 16. The sash lock of claim 13 wherein the resilient tab is moveable to a deflected position to permit the actuator arm to move between the locked and unlocked positions. 17. The sash lock of claim 16 wherein in the deflected position, a portion of the actuator arm slidingly engages the tab as the actuator arm moves between the locked and unlocked positions. 18. The sash lock of 16 wherein the tab moves from the deflected position to an engagement position after the actuator arm moves past the tab.
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이 특허에 인용된 특허 (39)
Hunt Larry R. (Indianapolis IN) Foster John R. (Indianapolis IN), Apparatus for operating a door latching and unlatching device.
Draheim Harvey J. (Weyauwega WI) Charlson Glenn T. (New London WI) Beiswenger John L. (Salem WI) Brunner Merlin A. (New London WI), Crib dropside including latch mechanism.
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