Movable or removable closures – Up-and-over type; e.g. – moves from vertical to withdrawn... – With operator
Reissue Patent
2007-03-13
2007-03-13
Redman, Jerry (Department: 3634)
Movable or removable closures
Up-and-over type; e.g., moves from vertical to withdrawn...
With operator
C049S197000, C160S191000
Reissue Patent
active
10277442
ABSTRACT:
A counterbalance system for an upward-acting door includes spaced-apart wall brackets and cable drums supported on the brackets and connected to flexible cables which depend from the drums and connected to the lower side edges of an upward-acting sectional garage door. One or both of the cable drums may be connected to one end of a torsion coil spring and the opposite end of each spring is connected to a hub assembly. Elongated spring winding and protective cover tubes are sleeved over the springs and are connected to the brackets by worm-gear drive winding mechanisms, respectively, for rotating the tubes to effect winding of the torsion coil springs through the hub assemblies but preventing rotation of the tubes during normal operation of the counterbalance system. The cable drums and spring hub assemblies may be supported on an elongated synchronizing shaft or a torque transfer shaft extending between and supported on the wall brackets.
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Boucher D. Scott
Hoofard Richard K.
Krupke LeRoy G.
Scates John E.
Gardere Wynne & Sewell LLP
Overhead Door Corporation
Redman Jerry
LandOfFree
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