Patent ID: 9125544
Filing Date: 2015-09-08
Classification: A47L

Abstract:
1. A floor surface maintenance machine, comprising: a longitudinally extending frame; wheels operatively connected to the frame; and a scrub head operatively connected to the frame and adjustable to an operational mode and a transport mode, the scrub head including a housing and a floor-engaging brush carried by the housing; and a lift mechanism and suspension including a linear actuator operable to adjust the scrub head to the operational mode and the transport mode, the lift mechanism and suspension includes a main suspension arm pivotally coupled to the scrub head, a bell crank pivotally coupled to the main suspension arm, the linear actuator pivotally coupled to the bell crank, and a biasing linkage that restricts the pivoting between bell crank and main arm, the restricted pivoting permitting the scrub head to rise and fall while passing over any undulations in the floor without requiring engagement of the linear actuator.