Patent ID: 8819896
Filing Date: 2014-09-02
Classification: E05D,E05Y,Y10T

Abstract:
1. A moving coil window balance assembly for installation in a window assembly, the window balance assembly comprising: a carrier; a curl spring; a mounting bracket; and wherein the carrier comprises a clamshell-type housing containing the curl spring and a receiver; wherein the housing comprises opposing first and second housing portions, a first aperture extending through the housing along a first axis and being located proximate a bottom end of the housing, arcuate recesses that at least partially surround the first aperture, and axial cam followers; wherein the receiver is rotatably engaged in the aperture and comprises a generally cylindrical member including slotted recesses formed in each end and having two symmetric, annular cams extending around a portion of the perimeter of the receiver; wherein when the receiver is in a first rotational position the cams are received in the recesses and the first and second housing portions are closed against one another at the bottom end; and wherein when the receiver is in a second rotational position the cams engage the axial cam followers and displace the first and second housing portions away from one another at the bottom end of the housing in a direction along the first axis; and wherein the housing further comprises an insert comprising a friction enhancing feature that protrudes from an exterior face of the housing that is perpendicular to the first axis.