Stability control system
First Claim
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1. A method of controlling tipping of a wheelchair frame based on downward movement of first and second rear casters with respect to the wheelchair frame comprising:
- allowing upward and downward movement of first and second front casters relative to the frame when the first and second rear casters are in normal operating positions relative to the frame;
allowing upward and downward movement of the first and second front casters relative to the frame when one of the rear casters moves downward from a normal operating position relative to the frame;
inhibiting upward movement of the first and second front casters relative to the frame when both of the rear casters move downward from the normal operating positions relative to the frame.
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Abstract
Embodiments of a suspension for a vehicle is provided. The suspension includes, for example, a frame and a locking assembly. The locking assembly inhibits tipping of a frame of the vehicle when tipping of the frame is detected.
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Citations
12 Claims
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1. A method of controlling tipping of a wheelchair frame based on downward movement of first and second rear casters with respect to the wheelchair frame comprising:
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allowing upward and downward movement of first and second front casters relative to the frame when the first and second rear casters are in normal operating positions relative to the frame; allowing upward and downward movement of the first and second front casters relative to the frame when one of the rear casters moves downward from a normal operating position relative to the frame; inhibiting upward movement of the first and second front casters relative to the frame when both of the rear casters move downward from the normal operating positions relative to the frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of controlling tipping of a wheelchair frame based on downward movement of first and second rear casters with respect to the wheelchair frame comprising:
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locking a first front caster and a second front caster against upward movement relative to the frame when both of the rear casters move downward from normal operating positions relative to the frame; allowing upward movement of both the first front caster and the second front caster relative to the frame when one of the rear casters returns to a normal operating position relative to the frame. - View Dependent Claims (10, 11, 12)
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Specification