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.

A window system includes a window frame; a transparent window pane; an energy harvesting device coupled to the window frame or the transparent window frame; an output device that uses or transmits electricity; and a battery housed in the window frame, the battery being in electrical communication with the energy harvesting device and the output device.

A moving coil, constant force, curl spring window balance assembly for installation in a hung window assembly comprising a sash is disclosed. The window balance assembly can include a carrier, a mounting bracket, a curl spring and a sash support bracket. The sash support bracket can be positioned intermediate the carrier and the mounting bracket. The sash support bracket can selectively engage at least one of the carrier or the mounting bracket. The sash support bracket is operable to supplement the counter-balance or holding force provided by the curl spring of the window balance assembly against the weight of the sash when the sash is in a raised position.

A window assembly is disclosed that includes a double-hung window aesthetic with an alternative opening procedure and mechanism. The window assembly may include various hardware systems. The hardware systems may include locking portions to assist in locking sash members to a frame and balance assembly for moving the sash members. The window assembly may be formed of selected materials.

A counterbalance system for a window sash in a window frame. The window frame has guide tracks. The guide tracks have wall surfaces. The wall surfaces are supported by reinforcement ribs. A mounting slot is formed in the guide track. The mounting slot is formed in a limited area of a wall that is not supported by a reinforcement rib. A coil spring is provided. The coil spring is made of a steel ribbon having a first end, an opposite second end, and a slot engagement configuration proximate said second end. The coil spring has a wide first width from its first end to the slot engagement configuration. This first width is too large to directly engage the mounting slot. The steel ribbon is reduced to a second width through the slot engagement configuration and continuing to the second end to pass into the mounting slot.

A side-load, hung window assembly can include a sash guide attached to the window sash and extending into a space between the window sash and the jamb channel. The sash guide can include a recess at an outer end to provide clearance for the sash guide to pass over the uncurled end portion of the curl spring and the mounting device. In addition, an aesthetic cover can be disposed over the mounting device. Alternatively or in addition, a spring cover can be disposed over the uncurled end portion of the curl spring and the mounting device.

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.

An inverted constant force window balance system includes a carrier assembly and a mounting bracket. The carrier assembly includes a housing, a coil spring disposed within the housing, and a shoe assembly coupled to the housing. The shoe assembly is configured to receive a pivot bar from a window sash and extend at least one brake upon rotation of the pivot bar. The mounting bracket is releasably coupled to the housing opposite the shoe assembly and is coupled to the free end of the coil spring. At least a portion of the mounting bracket is configured to slideably move in relation to the free end of the coil spring between at least two positions. When at least a portion of the mounting bracket moves between the at least two positions, the mounting bracket disengages from the housing and releases the mounting bracket from the carrier assembly.

An anchor mount system for anchoring a free end of a ribbon coil spring to a guide track of a window. The ribbon coil spring has an opening formed through its structure at a first distance from the free end. The anchor mount has a body with a first section and a second section. A first tab and a second tab protrude from the second section of the body. The second tab is angled toward said first tab at an inclined angle. A second distance exists between the first tab and the second tab. This second distance is generally equal to the first distance along the ribbon coil spring. This enables the end of the ribbon coil spring to become entrapped between the tabs when engaged with the tabs and manipulated in a certain manner.

A constant force window balance assembly for a side-load, hung window is disclosed. A side rail of a window sash disposed in a jamb channel has a first opening. The balance assembly is installed in the jamb channel and engages the sash at the first opening to support the sash with a counterbalance force. A carrier of the balance assembly includes a body having a sash engaging seat located at an upper end that directly engages the first opening in the side wall of the side rail of the window sash. The carrier can also include a lip located at an inner side of the carrier and extending upwardly from the sash engaging seat. The carrier can also include a projection at an upper end of the body to engage a retaining aperture in an uncurled end portion of a curl spring in a pre-installed configuration of the window balance.