Abstract: A window cleaning apparatus includes a cleaning mechanism that is mounted for movement relative to a window. The cleaning mechanism includes one or more cleaning tools, such as a brush and a wiper blade, and an onboard hydro-mechanical motor that provides the motive force for moving the cleaning mechanism. The cleaning mechanism has first and second drive wheels that engage first and second upright tracks, respectively, mounted on opposite sides of the window. The motor receives pressurized water from a water source (e.g., a water line of the building) and derives output mechanical power for rotating the drive wheels, which move along the tracks.

Abstract: This invention relates to apparatus and methods for measuring height variations on a floor surface to test for floor flatness sufficient for automated high level warehousing applications. An inclinometer mounted on a trolley set to follow a reference line produces signals indicative of the floor profile. A computer samples the sensor output at selected intervals and calculates floor height at the data points relative to a reference level. The floor profile data may be stored for subsequent use or it may be printed to form a plot or graph of the floor profile along the reference line.

Abstract: This invention relates to apparatus and methods for measuring height variations on a floor surface to test for floor flatness sufficient for automated high level warehousing applications. An inclinometer mounted on a trolley set to follow a reference line produces signals indicative of the floor profile. A computer samples the sensor output at selected intervals and calculates floor height at the data points relative to a reference level. The floor profile data may be stored for subsequent use or it may be printed to form a plot or graph of the floor profile along the reference line.