Abstract: A high vacuum pump having a centrifugally filtered intake with a particular utility as an aspirator in a dentist's office, for example, having a coaxial intake/output at the pump's rotor hub with a radial outlet therefrom, a liquid pressure seal on the top and bottom of the pump impeller assembly and an automatically flushed sump tank surrounding the intake filter.

Abstract: A servicing rack for motorcycles and the like includes a base having a track supported upward therefrom with a stationary section of the track and a pivotal section of the track adapted to receive the wheels of a vehicle such as a motorcycle or the like and support the vehicle in an elevated position for servicing, with power means for lifting the pivotal section of the track and the vehicle to the elevated position. The rack includes clamping means for clamping one wheel of the vehicle in position for holding it in an upright position and for cooperating with an adjustable support stand for supporting the vehicle in a suspended position when the pivotal portion of the track is lowered to the supporting surface.

Abstract: A self-cleaning fluid filter for filtering fluid entering an inlet of a pump, such as an air pump, in which a fluid filter is wrapped around a filter spool forming a filter drum and the drum coupled to the shaft of the pump motor for rotation thereof. The fluid entering the rotating filter will then be filtered of its impurities which, due to centrifugal force, will be dispersed outwardly from the filter drum to drop into a residue container. A deflector plate is disposed in proximity to the inlet for deflecting heavy particles to the residue container.