Stability control system
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.
1. A wheelchair comprising:
a frame;
a pair of drive wheel supporting the frame;
first and second front casters;
first and second rear casters;
first and second rear caster pivot arms coupled to the frame at a first and second pivot connections;
first and second rear caster position sensing arrangements, each comprising:
a trigger engagement assembly having an elongate member, the elongate member having a first end portion coupled to the frame at a third pivot connection and a second end portion having an adjustable trigger engagement member.
2. The wheelchair of claim 1 wherein the first, second and third pivot connections are substantially co-axial.
3. The wheelchair of claim 1 wherein the third pivot is axially offset from the first and second pivot connections.
4. The wheelchair of claim 1 wherein the rear caster position sensing arrangement further comprises a brace connecting each elongate member together.
5. The wheelchair of claim 4 wherein the brace is axially offset from the third pivot connection.
6. The wheelchair of claim 4 wherein the brace rigidly connects each elongate member together.
7. The wheelchair of claim 1 further comprising a stop member coupled to each rear caster pivot arm.
8. The wheelchair of claim 1 wherein the rear caster position sensing arrangement further comprises:
a brace connecting each elongate member together, the brace comprising a first engagement surface;
a stop member coupled to each rear caster pivot arm, the stop member comprising a second engagement surface configured to selectively engage and disengage the first engagement surface.
9. The wheelchair of claim 1 wherein the rear caster position sensing arrangement further comprises a brace for limiting the relative movement between each elongate member.
10. The wheelchair of claim 1 further comprising a biasing member disposed between each rear caster pivot arm and elongate member.
11. A wheelchair comprising:
a frame;
a pair of drive wheel supporting the frame;
first and second front casters;
first and second rear casters;
first and second rear caster pivot arms coupled to the frame at a first and second pivot connections;
first and second rear caster position sensing means, each comprising:
a trigger engagement means having an elongate means, the elongate means having a first portion coupled to the frame at a third pivot connection and a second portion having an adjustable trigger engagement means.
12. The wheelchair of claim 11 wherein the rear caster position sensing means further comprises a means for limiting the relative movement between each elongate means.
13. The wheelchair of claim 11 wherein the rear caster position sensing means further comprises:
a means connecting each elongate means together; and
a stop means coupled to each rear caster pivot arm, the stop means configured to selectively engaging and disengaging the means for connecting.
14. The wheelchair of claim 11 wherein the first, second and third pivot connections are substantially co-axial.
15. The wheelchair of claim 11 wherein the third pivot is axially offset from the first and second pivot connections.
16. The wheelchair of claim 11 further comprising a biasing means disposed between each rear caster pivot arm and elongate means.
17. A wheelchair comprising:
a frame;
a pair of drive wheel supporting the frame;
first and second front casters;
first and second rear casters;
first and second rear caster pivot arms coupled to the frame at a first and second pivot connections;
first and second rear caster position sensing arrangements, each comprising:
a trigger engagement assembly having an elongate member, the elongate member coupled to the frame at a third pivot connection and having an adjustable trigger engagement member.
18. The wheelchair of claim 17 wherein the rear caster position sensing arrangement further comprises a brace connecting each elongate member together and a stop member for each rear caster pivot arm and configured to selectively engage and disengage the brace member.
19. The wheelchair of claim 17 further comprising a biasing member disposed between each rear caster pivot arm and elongate member.
20. The wheelchair of claim 17 wherein the first, second and third pivot connections are substantially co-axial.
21. The wheelchair of claim 17 wherein the third pivot is axially offset from the first and second pivot connections.