Back to results
US 9,517,919 B2Granted
Elevator with adjustable buffer length
AssigneeKone Corporation
InventorsJaakko Kalliomäki, Mikko Puranen
Life of this patent
Estimating the term…
Abstract
An elevator includes at least one elevator car driving along an elevator shaft as well as an elevator control measuring the car position. The elevator further includes a buffer in the shaft pit, whose length is adjustable in response to the car position and car speed. Via this measure, the shaft pit can be reduced in high speed elevator requiring large buffer lengths.
Claims18
An elevator comprising:
- at least one elevator car driving in an elevator shaft;
- an elevator control measuring the car position;
- and
- a buffer in a shaft pit of the elevator shaft,
- whereby a length of the buffer is adjustable in response to the car position,
- wherein the elevator control has a buffer control part which is configured to monitor the deceleration of the elevator car when approaching the lowest landing in the elevator shaft, and wherein the buffer control part is configured to decrease the buffer length if the car deceleration during approach to the lowest landing corresponds to a given slope.
3 more elements
A method for adjusting the length of a buffer in the shaft pit of an elevator shaft, said method comprising the steps of:
- determining the position of an elevator car;
- and
- adjusting the length of the buffer in response to the actual car position,
- wherein the buffer length is reduced when the elevator car approaches the lowest landing and decelerates according to a given deceleration slope.
1 more element
Dependencies are inferred from the claim text.