Movable or removable closures – With means mounting closure for reciprocation – With counterbalance
Patent
1992-07-15
1993-12-07
Cuomo, Peter M.
Movable or removable closures
With means mounting closure for reciprocation
With counterbalance
16197, 49445, E05F 100
Patent
active
052674169
ABSTRACT:
A multiple spring counterbalance includes a torsion spring and a tension spring for exerting a combined lifting force on a window sash. A spiral rod is threadably engaged with a follower nut for converting a torque applied by the torsion spring into a lifting force on the window sash. The spiral rod has a pitch that is varied along one part of its length to produce a substantially constant combined lifting force throughout most of a range of sash travel between a lowered position and an intermediate position. However, the pitch is further varied along another part of the length of the spiral member to produce a larger combined lifting force within a remaining portion of the range of sash travel from the intermediate position to the raised position.
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Instruction Sheet for Tilt/Takeout System: "Field Adjustment Procedures for Single or Tandem Balances"-Caldwell Manufacturing Company, Rochester, NY.
Caldwell Manufacturing Company
Cuomo Peter M.
Milano Michael
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