A locking window that is selectively movable between a first closed position and a second open position and a window latch adapted to be attached to the window is disclosed. The window latch includes a cam latch, a housing including a support wall, a pivot fastener for attaching the cam latch to the
A locking window that is selectively movable between a first closed position and a second open position and a window latch adapted to be attached to the window is disclosed. The window latch includes a cam latch, a housing including a support wall, a pivot fastener for attaching the cam latch to the housing, and a detent for retaining the cam latch in one of the open and the locked positions.
대표청구항▼
We claim: 1. A window latch for a locking window, said window having a window frame including at least one window sash which is selectively movable between a first closed position and a second open position, said window latch comprising: (a) a cam latch selectively movable between a first open posi
We claim: 1. A window latch for a locking window, said window having a window frame including at least one window sash which is selectively movable between a first closed position and a second open position, said window latch comprising: (a) a cam latch selectively movable between a first open position and a second locked position to secure the window sash in said closed position; (b) a housing including an opening for said cam latch, a perimeter wall having opposing ends defining said opening on one side of said housing, and a pair of rigid interior support walls, each partially defining said opening and extending across said housing from one opposing end of said perimeter wall to said perimeter wall on an opposite side of the housing wherein said perimeter wall having an opening for said cam latch and said pair of rigid interior support walls extend downward to engage the surface of the window sash to provide support for said housing; (c) a pivot fastener for attaching said cam latch to said housing; (d) a bushing adapted for use with said pivot fastener; and (e) a detent for retaining said cam latch in one of said open and said locked positions, wherein said detent includes at least one protrusion on one of said housing and said cam latch and a receiving groove on the other of said housing and said cam latch, said receiving groove for receiving said protrusion, said protrusion and said groove being substantially parallel to the axis of said pivot fastener. 2. The apparatus according to claim 1, wherein said cam latch includes an actuator arm, a locking arm and a pivot point location between said actuator arm and said locking arm. 3. The apparatus according to claim 2, further including a finger tab on said actuator arm. 4. The apparatus according to claim 2, said locking arm further including a cam wall. 5. The apparatus according to claim 2, wherein the ratio of the length of said actuator arm to the length of said locking arm is greater than about 2 to provide a mechanical advantage when said window latch is operated. 6. The apparatus according to claim 2, wherein one of said actuator arm and said locking arm includes a key lock receptor and the other of said actuator arm and said locking arm including a complementary key lock extending into said key lock receptor for attaching said cam latch to said housing. 7. The apparatus according to claim 6, further including a fastener extending into said key lock and key lock receptor. 8. The apparatus according to claim 7, said fastener is a self-tapping threaded fastener. 9. The apparatus according to claim 6, one of said key lock and said key lock receptor further including an alignment feature and the other of said key lock and said key lock receptor further including a mating alignment feature. 10. The apparatus according to claim 1, wherein said housing extends beyond said pivot fastener parallel to said window frame and includes an aperture for receiving a fastener for attaching said housing to said window. 11. The apparatus according to claim 10, wherein said aperture for receiving a fastener for attaching said housing to said window includes a retainer for receiving a fastener. 12. The apparatus according to claim 10, wherein the base of said aperture for receiving a fastener includes a cavity for receiving shavings formed by attaching said window latch to said window. 13. The apparatus according to claim 1, wherein said housing extends beyond said pivot fastener parallel to said window frame to include a finger shoulder for providing access to said cam latch. 14. The apparatus according to claim 13, wherein said support wall is between said aperture and cam latch. 15. The apparatus according to claim 14, wherein said support wall is substantially perpendicular to said window frame. 16. The apparatus according to claim 1, further including a locking arm catch. 17. The apparatus according to claim 16, further including a cam detent for engaging said locking arm. 18. The apparatus according to claim 16, further including an aperture for receiving a fastener for attaching said locking arm catch to said window. 19. The apparatus according to claim 18, wherein said aperture for receiving a fastener for attaching said locking arm catch to said window includes a retainer for receiving a fastener. 20. The apparatus according to claim 1, wherein said pivot fastener is substantially non-compressible so as to facilitate the selective movement of said cam latch between said first open position and said second locked position. 21. A locking window, said window comprising: (a) a window frame including at least one window sash which is selectively movable between a first closed position and a second open position; and (b) a window latch adapted to be attached to said window and that is selectively movable between a first open position and a second locked position to secure said window sash in said closed position, said window latch comprising: (i) a cam latch selectively movable between a first open position and a second locked position to secure the window sash in said closed position; (ii) a housing including an opening for said cam latch, a perimeter wall having opposing ends defining said opening on one side of said housing, and a pair of interior rigid support walls, each partially defining said opening and extending across said housing from one opposing end of said perimeter wall to said perimeter wall on an opposite side of the housing wherein said perimeter wall having an opening for said cam latch and said pair of rigid interior support walls extend downward to engage the surface of the window sash to provide support for the housing; (iii) a pivot fastener for attaching said cam latch to said housing; (iv) a bushing between said cam latch and said housing; and (v) a detent for retaining said cam latch in one of said open and said locked positions, wherein said detent includes at least one protrusion on one of said housing and said cam latch and a receiving groove on the other of said housing and said cam latch, said receiving groove for receiving said protrusion, said protrusion and said groove being substantially parallel to the axis of said pivot fastener. 22. The apparatus according to claim 21, wherein said detent provides an audible indication of said cam latch being in one of said open and said locked positions. 23. The apparatus according to claim 21, wherein said detent includes at least one protrusion on one of said housing and said cam latch and a receiving groove on the other of said housing and said cam latch, said protrusion and said groove being substantially parallel to the axis of said pivot fastener. 24. The apparatus according to claim 21, wherein said detent includes at least one protrusion on one of said housing and said cam latch and a semi-circular receiving groove on the other of said housing and said cam latch, said semi-circular receiving groove including at least one barbell shaped portion for receiving said protrusion, said protrusion being substantially parallel to the axis of said pivot fastener and said groove being substantially perpendicular to the axis of said pivot fastener. 25. The apparatus according to claim 21, wherein said detent includes at least one resilient portion on one of said housing and said bushing, said resilient portion for accommodating said protrusion when said cam latch is moved from one of said open and said locked positions to the other of said open and said locked positions. 26. The apparatus according to claim 21, wherein said cam latch includes an actuator arm, a locking arm and a pivot point location between said actuator arm and said locking arm. 27. The apparatus according to claim 26, further including a finger tab on said actuator arm. 28. The apparatus according to claim 26, said locking arm further including a cam wall. 29. The apparatus according to claim 26, wherein the ratio of the length of said actuator arm to the length of said locking arm is greater than about 2 to provide a mechanical advantage when said window latch is operated. 30. The apparatus according to claim 26, wherein one of said actuator arm and said locking arm includes a key lock receptor and the other of said actuator arm and said locking arm includes a complementary key lock extending into said key lock receptor for attaching said cam latch to said housing. 31. The apparatus according to claim 30, further including a fastener extending into said key lock and key lock receptor. 32. The apparatus according to claim 31, said fastener is a self-tapping threaded fastener. 33. The apparatus according to claim 30, one of said key lock and said key lock receptor further including an alignment feature and the other of said key lock and said key lock receptor further including a mating alignment feature. 34. The apparatus according to claim 21, wherein said housing extends beyond said pivot fastener parallel to said window frame and includes an aperture for receiving a fastener for attaching said housing to said window. 35. The apparatus according to claim 34, wherein said aperture for receiving a fastener for attaching said housing to said window includes a retainer for receiving a fastener. 36. The apparatus according to claim 34, wherein the base of said aperture for receiving a fastener includes a cavity for receiving shavings formed by attaching said window latch to said window. 37. The apparatus according to claim 21, wherein said housing extends beyond said pivot fastener parallel to said window frame to include a finger shoulder for providing access to said cam latch. 38. The apparatus according to claim 37, wherein said support wall is between said aperture and cam latch. 39. The apparatus according to claim 38, wherein said support wall is substantially perpendicular to said window frame. 40. The apparatus according to claim 21, further including a locking arm catch. 41. The apparatus according to claim 40, further including a cam detent for engaging said locking arm. 42. The apparatus according to claim 40, further including an aperture for receiving a fastener for attaching said locking arm catch to said window. 43. The apparatus according to claim 42, wherein said aperture for receiving a fastener for attaching said locking arm catch to said window includes a retainer for receiving a fastener. 44. The apparatus according to claim 21, wherein said pivot fastener is substantially non-compressible so as to facilitate the selective movement of said cam latch between said first open position and said second locked position.
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이 특허에 인용된 특허 (52)
Piltingsrud Stephen M. (Owatonna MN), Biased check rail lock.
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