Counterweight for elevator system
AssigneeOtis Elevator Company
InventorsBruce ST. PIERRE, Daniel B. DAVIS, III, Bruce P. SWAYBILL
Life of this patent
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Abstract
A counterweight is provided including a counterweight frame including a crosshead. A counterweight hitch is operably coupled to the counterweight frame. The counterweight hitch includes a vertically stacked first sheave channel and a second sheave channel. Each of the first sheave channel and second sheave channel includes an interior cavity within which at least one individual sheave assembly is mounted. The plurality of individual sheave assemblies is substantially identical and arranged at an angle relative to a central plane of the counterweight frame.
Claims15
A counterweight comprising:
- a counterweight frame including a crosshead;
- and
- a counterweight hitch operably coupled to the counterweight frame, the counterweight hitch including a first sheave channel and a second sheave channel vertically connected by an first upright and a second upright, each of the first sheave channel and second sheave channel includes an interior cavity within which at least one individual sheave assembly is mounted, the plurality of individual sheave assemblies being substantially identical and arranged at an angle relative to a central plane of the counterweight frame.
An elevator system, comprising:
- a hoistway having a machine room arranged at a first end;
- a car coupled with at least one car guide rail for movement in the hoistway;
- a counterweight coupled with at least one counterweight guide rail for movement in a hoistway, the counterweight and the at least one counterweight guide rail being offset from a center of the car, the counterweight including:
- a counterweight frame including a crosshead;
- and
- a counterweight hitch operably coupled to the counterweight frame, the counterweight hitch including a first sheave channel and a second sheave channel vertically connected by an first upright and a second upright, each of the first sheave channel and second sheave channel includes an interior cavity within which at least one individual sheave assembly is mounted, the plurality of individual sheave assemblies being substantially identical and arranged at an angle relative to a central plane of the counterweight frame;
- a plurality of tension members operably coupling the car and the counterweight, each of the plurality of tension members being arranged about one of the plurality of individual sheaves of the counterweight hitch;
- and
- a drive machine configured to engage the plurality of tension members to move the car and counterweight within the hoistway.
Dependencies are inferred from the claim text.