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US 10,519,002 B2Granted
Stairlift speed control
AssigneeStannah Stairlifts Limited
InventorsPaul Alexander Cook, Gavin Scott Pugh
Life of this patent
Estimating the term…
Abstract
The invention provides a method and apparatus for controlling the speed of a stairlift (10). The speed of rotation of the carriage (12), whilst traversing bends in the rail (11), is monitored and the speed of the carriage drive motor (13) then controlled in reaction to the speed of rotation. A 3-axis gyroscope (31) is preferably used to monitor the speeds of rotation of the carriage (12) and the outputs from this gyroscope (31) may be processed to provide different degrees of speed control.
Claims9
A method of controlling the speed of a stairlift, the stairlift having:
- a rail having at least one bend therein;
- a carriage mounted on said rail;
- a carriage drive motor operable to drive said carriage along said rail;
- and
- a chair mounted on said carriage, said method including generating a signal representative of a speed of rotation of said carriage as said carriage moves through said at least one bend;
- and using said signal as a control to said carriage drive motor.
3 more elements
A stairlift, including:
- a rail having at least one bend therein;
- a carriage mounted on said rail;
- a carriage drive motor operable to drive said carriage along said rail;
- and a chair mounted on said carriage;
- said stairlift further including a speed control facility configured to generate a signal representative of a speed of rotation of said carriage as said carriage moves through said at least one bend;
- and to apply said signal as a control to a speed of said carriage drive motor.
3 more elements
Dependencies are inferred from the claim text.