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US 2004/0163210 A1Published application
Block and tackle sash balance shoe
AssigneePomeroy, Incorporated
InventorNeeman Malek
Life of this patent
Estimating the term…
Abstract
A sash balance shoe housing designed to move along a window frame contains a spring attached to the housing and to a first pulley block that is movable along the housing, a second pulley block fixed against movement along the housing integrally molded with a brake mechanism bearing surface for supporting a cam designed to connect to a sash, and a cord attached by one end to one of the first pulley block and the second pulley block, wrapped around at least one pulley in each block and extending from the housing for attaching the other end to the window frame.
Claims10
A sash balance shoe comprising:
- a housing having a first length, adapted for moving along a second length of a window frame track,
- a first elastic element comprising a first end attached to said housing against movement in said housing along the first length, and a second end attached to a first pulley block that is movable in said housing along said first length,
- a second pulley block mounted in said housing fixed against movement in said housing along said first length, spaced from said first pulley block,
- a second element mounted in said second pulley block, rotatable about a first axis through said second pulley block by rotation of the sash out of the window frame when said second element is connected to the sash and the housing is mounted on the track.
1 more element
A sash balance shoe comprising:
- a housing having a first end, a second end and a first length from said first end to said second end, adapted for moving along a second length of a window frame track, the first length parallel to the second length,
- an elastic element having a second end attached to the housing against movement in said housing along said first length, and having a third end attached to a first pulley block that is movable in said housing along said first length,
- a second pulley block mounted in said housing fixed against movement in said housing along said first length, spaced from said first pulley block,
- a cam mounted in said second pulley block, rotatable about a first axis in response to rotation of the sash out of the window frame when said cam is connected to the sash,
- a cord having a first end attached to one of said first pulley block and said second pulley block, wrapped around a first pulley in said first pulley block, wrapped around a second pulley in said second pulley block, extending from said housing for attachment of a second end of said cord to the window frame when said housing is mounted on the track for movement along the track.
2 more elements
Dependencies are inferred from the claim text.