Patent ID: 11859424
Assignee: JOHN EVANS' SONS, INCORPORATED
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. In a tilt-in window assembly having a sash that moves in a guide track, wherein the sash can be selectively moved into a tilted orientation, a counterbalance system comprising:
a ribbon spring having a first end, said ribbon spring having a flexible tab formed thereon;
a brake shoe that moves in said guide track with said sash, said brake shoe having a receptacle that receives and retains said first end of said ribbon spring, wherein said brake shoe expands and locks in said guide track when said sash is moved into said tilted orientation;
a protrusion extending from said brake shoe, wherein said protrusion presses against said flexible tab and moves said flexible tab into contact with said guide track when said brake shoe expands.