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US 6,659,230 B1Granted
Safety brake for stairlifts
AssigneeStannah Stairlifts Limited
InventorMartyn Harry Jenkins
Life of this patent
Estimating the term…
Abstract
The present invention relates to an overspeed governor for a stairlift and is characterised in that it can operate in two opposite directions. This means that the same device can be fitted to stairlifts regardless of whether the stairlift installation is left or right handed.
Claims11
A governor apparatus for governing speed of movement of a stairlift carriage along a stairlift rail, the stairlift carriage being movable in opposite directions along a longitudinal axis of the stairlift rail, said governor apparatus comprising:
- a braking member displaceable into contact with the stairlift rail;
- and,
- operating means operable for causing engagement of said braking member with the stairlift rail when the speed of movement of the stairlift carriage along the stairlift rail exceeds a predetermined maximum speed,
- said operating means comprising:
- a guiding surface, rotatable with movement of the stairlift carriage along the stairlift rail;
- and,
- a follower, operatively connected to said braking member, in sliding contact with said guiding surface when the speed of movement of the stairlift carriage is less than said predetermined maximum speed.
4 more elements
A stairlift apparatus, comprising:
- a stairlift rail;
- a stairlift carriage movable in opposite directions along a longitudinal axis of said stairlift rail;
- and,
- a governor apparatus for governing a speed of movement of said stairlift carriage along said stairlift rail, said governor apparatus comprising:
- a braking member displaceable into contact with said stairlift rail;
- and,
- operating means operable for causing engagement of said braking member with said stairlift rail when the speed of movement of said stairlift carriage along said stairlift rail exceeds a predetermined maximum speed,
- said operating means comprising:
- a guiding surface, rotatable with movement of said stairlift carriage along said stairlift rail;
- and,
- a follower, operatively connected to said braking member, in sliding contact with said guiding surface when the speed of movement of said stairlift carriage is less than said predetermined maximum speed.
8 more elements
Dependencies are inferred from the claim text.