Elevator pressure traction arrangement
AssigneeOtis Elevator Company
InventorsSlawomir Drabot, Michael Flynn, Simon Shang
Life of this patent
Estimating the term…
Abstract
A traction arrangement for propelling an elevator cab within an elevator system includes a traction device. The traction device applies a load normal to a driving sheave that biases the elevator rope or belt against the sheave. The tension device preferably includes a plurality of rolling members that move about their axes responsive to relative movement between the driving sheave and the rope or belt. A traction belt rides upon the rolling members and the traction belt engages the rope or belt to bias it against the driving sheave with a preferably distributed force.
Claims16
An assembly for propelling an elevator cab, comprising:
- at least one sheave having a rotating portion;
- an elongated load bearing member that engages the rotating portion such that movement of the rotating portion propels the elevator cab;
- and
- at least one traction device supported near the rotating portion, the traction device continuously biasing the load bearing member against the rotating portion along an arcuate portion of the rotating portion, the traction device including a plurality of rolling members and a traction belt that is supported on the rolling members, the traction belt engaging the load bearing member, the traction belt moving relative to the rolling members responsive to movement of the rotating portion.
An elevator system comprising:
- a cab adapted to carry a load between landings;
- an elongated load bearing member that supports the cab and an associated load;
- at least one driving sheave that is supported for movement with the elevator cab and that has a rotating portion that engages the load bearing member such that movement of the rotating portion moves the elevator cab relative to the load bearing member;
- and
- at least one traction device supported near the driving sheave, the traction device continuously biasing a corresponding portion of the load bearing member against the rotating portion, the traction device including a plurality of rolling members and a traction belt that is supported on the rolling members, the traction belt engaging the load bearing member.
An elevator system comprising:
- a cab adapted to carry a load between landings;
- an elongated load bearing member that supports the cab and an associated load;
- at least one driving sheave supported for movement with the elevator cab that has a rotating portion that engages the load bearing member such that movement of the rotating portion moves the elevator cab relative to the load bearing member;
- and
- at least one traction device supported near the driving sheave, the traction device contacting and continuously biasing a corresponding portion of the load bearing member against the rotating portion, the traction device providing sufficient traction between the load bearing member and the rotating portion to allow the movement of the rotating portion to move the elevator cab.
Dependencies are inferred from the claim text.