Power assisted wheeled carriage

摘要

A power assisted wheeled carriage includes a patient support having a length, a wheeled base supporting the patient support, and an auxiliary wheel mechanism including an auxiliary wheel spring support for biasing an auxiliary wheel into contact with a floor. The carriage further includes a control apparatus for moving the auxiliary wheel away from the floor. The auxiliary wheel spring support can be a spring steel member having an opening and biased to move the auxiliary wheel into contact with the floor. The control apparatus can include a foot pedal for turning a rotatable shaft that enables a cam apparatus to apply an upward force to the auxiliary wheel. The wheeled carriage also includes a drive handle pivotable about a single axis to control a drive motor for the auxiliary wheel. The drive handle controls driving of the wheeled carriage in forward and rearward directions.