Window balance assembly
View Patent ↗A window balance assembly may include a carrier, a spring element, and a mounting bracket. The spring element may include first and second portions. The first portion may be coupled to the carrier. The mounting bracket may engage the second portion of the spring element and may selectively engage the carrier. The mounting bracket may include a first mounting surface disposed at a non-perpendicular angle relative to an exterior surface of carrier when the window balance assembly is in an uninstalled configuration. The first mounting surface may be substantially parallel to the exterior surface of the carrier when the window balance assembly is in an installed configuration and the mounting bracket is disengaged from the carrier.
1. A window balance assembly comprising:
a carrier;
a spring element having first and second portions, the first portion being coupled to the carrier; and
a mounting bracket engaging the second portion of the spring element,
wherein the mounting bracket is releasably mounted to the carrier, and either or both of a portion of the mounting bracket and a portion of the carrier deform in response to application of a force to disengage the mounting bracket from the carrier.
2. The window balance assembly of claim 1 , wherein only one of the portion of the carrier and the portion of the mounting bracket deforms in response to application of the force.
3. The window balance assembly of claim 1 , wherein both of the portion of the carrier and the portion of the mounting bracket deform in response to application of the force.
4. The window balance assembly of claim 1 , wherein the portion of the carrier deforms in response to application of the force.
5. The window balance assembly of claim 4 , wherein the portion of the carrier deforms elastically in response to the application of force.
6. The window balance assembly of claim 4 , wherein the portion of the carrier deforms plastically in response to the application of force.
7. The window balance assembly of claim 1 , wherein the portion of the mounting bracket deforms in response to application of the force.
8. The window balance assembly of claim 7 , wherein the portion of the mounting bracket deforms elastically in response to the application of force.
9. The window balance assembly of claim 7 , wherein the portion of the mounting bracket deforms plastically in response to the application of force.
10. A window balance assembly comprising:
a carrier;
a spring element having first and second portions, the first portion being coupled to the carrier; and
a mounting bracket including a spring engagement feature engaging the second portion of the spring element,
wherein the mounting bracket is coupled to the carrier by a stress riser, the stress riser failing in response to application of a force to disengage the mounting bracket from the carrier.
11. The window balance assembly of claim 10 , wherein the stress riser is a part of the mounting bracket.
12. The window balance assembly of claim 10 , wherein the stress riser is a part of the carrier.
13. The window balance assembly of claim 10 , wherein the stress riser fails in response to a fastener being tightened against the mounting bracket to secure the mounting bracket to a window jamb.
14. The window balance assembly of claim 10 , wherein failing of the stress riser includes a fracture.
15. The window balance assembly of claim 10 , wherein failing of the stress riser includes elastic deformation.
16. The window balance assembly of claim 10 , wherein failing of the stress riser includes plastic deformation.
17. The window balance assembly of claim 10 , wherein the mounting bracket is coupled to the carrier when the window balance assembly is in a uninstalled configuration and is disengaged from the carrier when the window balance assembly is in an installed configuration.
18. The window balance assembly of claim 17 , wherein the mounting bracket includes a member connected to the stress riser in the uninstalled configuration, the member engaging the carrier in the uninstalled configuration.
19. The window balance assembly of claim 18 , wherein the member slidably engages the carrier.
20. The window balance assembly of claim 10 , wherein the carrier includes a first surface facing a second surface of a window sash, and wherein the mounting bracket includes a mounting surface that engages a third surface of a window jamb, the mounting surface being disposed at a non-perpendicular angle relative to the first surface when the window balance assembly is in an uninstalled configuration, the mounting surface being substantially parallel to the first surface in an installed configuration.
21. The window balance assembly of claim 10 , wherein the spring engagement feature includes a latch extending away from the carrier and engaging an aperture in the spring element.
22. The window balance assembly of claim 10 , wherein the mounting bracket includes slot receiving at least a portion of a window jamb cover.
23. The window balance assembly of claim 10 , wherein the mounting bracket engages a window jamb and the carrier engages a window sash and is movable with the window sash relative to the window jamb.
24. The window balance assembly of claim 23 , wherein the carrier includes a first housing portion, a second housing portion, and a cam member engaging a pivot bar of a window sash, wherein movement of the window sash into a tilted position causes rotation of said pivot bar, which rotates the cam member to separate the first and second housing portions and force the first and second housing portions against opposing surfaces of the window jamb to selectively fix the carrier relative to the window jamb.
25. The window balance assembly of claim 23 , wherein the carrier includes a housing and a rotatable receiver engaging the housing, the receiver having a first slot engaging a pivot bar connected to the window sash, the housing including a second slot adapted to at least partially receive the pivot bar, the second slot being substantially aligned with the first slot in the receiver.
26. The window balance assembly of claim 23 , wherein the spring element includes a curl spring.
27. The window balance assembly of claim 26 , wherein the carrier includes a nest engaging a curled portion of the spring element.
28. A window balance assembly for installation in a window assembly, the window balance assembly being configurable between an uninstalled configuration and an installed configuration and including a carrier, a spring element and a mounting bracket, the spring element having first and second portions, the first portion being coupled to the carrier, the second portion being coupled to the mounting bracket, the mounting bracket being coupled to the carrier by a stress riser in the uninstalled configuration, the stress riser failing in response to application of a force to disengage the mounting bracket from the carrier.
29. The window balance assembly of claim 28 , wherein the stress riser includes a portion of the mounting bracket.
30. The window balance assembly of claim 28 , wherein the stress riser is a portion of the carrier.
31. The window balance assembly of claim 28 , wherein the stress riser fails in response to a fastener being tightened against the mounting bracket to secure the mounting bracket to a window jamb.
32. The window balance assembly of claim 28 , wherein failing of the stress riser includes at least one of a fracture, an elastic deformation, and plastic deformation.
33. The window balance assembly of claim 28 , wherein the carrier includes a first surface facing a second surface of a window sash, and wherein the mounting bracket includes a mounting surface that engages a third surface of a window jamb, the mounting surface being disposed at a non-perpendicular angle relative to the first surface when the window balance assembly is in the uninstalled configuration, the mounting surface being substantially parallel to the first surface in the installed configuration.
34. The window balance assembly of claim 28 , wherein the uninstalled configuration is a shipping configuration.