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

Claim 8:
9. A counterbalance system set in a guide track of a tilt-in window, said system comprising:
a ribbon spring that terminates with a shaped head;
a flexible tab formed in said ribbon spring;
a brake shoe having a receptacle formed therein, wherein said receptacle receives and retains said shaped head of said ribbon spring, therein interconnecting said ribbon spring to said brake shoe;
a protrusion extending from said brake shoe;
a cam supported within said brake shoe, wherein said cam expands said brake shoe when turned, therein causing said protrusion on said brake shoe to be biased against said flexible tab in said ribbon spring, therein causing said flexible tab to flex and extend away from said ribbon spring at an inclined angle.