| 摘要 |
The present invention provides a balance assembly ( 10 ) for use with a sash window assembly ( 104 ) slidable within a master frame ( 110 ). The balance assembly ( 10 ) generally includes a plate ( 20 ), at least one coil ( 40 ), and a shoe or pivot brake assembly ( 60 ). The plate ( 20 ) is adapted to be attached to the master frame ( 110 ). The spring ( 40 ) has a coiled portion ( 42 ), an intermediate portion ( 43 ), and a free portion ( 44 ). The coiled portion ( 42 ) of the spring ( 40 ) is rotatably supported by a support member ( 30 ) extending from the plate ( 20 ). The free portion ( 44 ) of the spring ( 40 ) has a curved configuration with a curved end ( 46 ). The pivot brake assembly ( 60 ) has at least one slot ( 76 ) adapted to receive and retain the free portion ( 44 ) of the spring ( 40 ). The slot ( 76 ) defines a protrusion ( 83 ) that engages the free portion ( 44 ). |
