CPC B60B 33/023 (2013.01) [A61G 5/04 (2013.01); F16C 19/383 (2013.01)] | 32 Claims |
1. A vehicle comprising:
a frame;
a drive wheel coupled to the frame;
a caster housing coupled to the frame, the caster housing including an opening;
a caster including a caster wheel and a caster stem extending through the opening in the caster housing, the caster stem configured to rotate relative to the caster housing;
a locking element coupled to the caster stem;
a first bearing coupled to the caster stem; and
a biasing element spaced apart from the caster housing and coupled to the caster stem,
wherein the biasing element is configured to exert a force on the first bearing to increase friction in the first bearing.
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