Patent ID: 7758055
Filing Date: 2010-07-20
Classification: B62B

Abstract:
1. A dolly that is used with a cleaning device, and has: a base; a set of parallel wheels; a brake arm that is hinged to the base and pivots between a) an engaged position in which part of the brake arm acts to retard rotation of one of the parallel wheels and b) a disengaged position in which the brake arm is disengaged from the wheel; a spring that biases the brake arm to the disengaged position; a pin that is connected to the base and extends through a slot in the brake arm; and an operator-engagable lever that is hinged to an end of the pin and pivots between a) a locked position in which a part of the lever presses the brake arm into the engaged position and b) an unlocked position in which the part of the lever that presses the brake arm into the engaged position is in a different position, enabling the spring to move the brake arm into the disengaged position.