Passenger conveyor step having an accoustic barrier
AssigneeOtis Elevator Company
InventorVijay Jayachandran
Life of this patent
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Abstract
An escalator step (12) includes a sound barrier material (40) covering over at least a portion of an inner surface (42) of a tread portion(30) and an inner surface (44) of a rise portion (32). In one example, the sound barrier material (40) comprises a sheet of vinyl. The sound barrier material (40) reduces noise radiation from the step (12) toward a cavity (26) within a passenger conveyor support structure (20) and reduces noise emanations from the cavity (26) through the steps (12). Several embodiments for securing the sound barrier material (40) in place are disclosed.
Claims24
A passenger conveyor step, comprising:
- a tread portion having an outer surface adapted to face toward a passenger and an inner surface facing in a generally opposite direction from the outer surface;
- a riser portion extending away from the tread portion and having an outer surface and an inner surface;
- and
- a sound barrier material covering at least some of the inner surface of the tread portion and at least some of the inner surface of the riser portion.
A method of controlling sound emission associated with a passenger conveyor system that has a plurality of steps each having an outwardly facing surface and an inner surface facing toward a cavity between the steps, comprising:
- covering inner surfaces of the steps with a sound barrier material to thereby reduce sound radiation from the steps into the cavity.
A passenger conveyor, comprising:
- a plurality of steps arranged to travel around a loop with a cavity defined between inner sides of steps on opposite sides of the loop;
- a drive machine for propelling the steps around the loop;
- and
- a sound barrier material covering at least some inner sides of the steps such that the sound barrier material reduces sound radiation from the steps toward the cavity.
Dependencies are inferred from the claim text.