Patent ID: 7216526
Filing Date: 2007-05-15
Classification: G01N

Abstract:
1. In combination, a sliding vane rotary pump and a wear calibration device, comprising: a housing, the interior of the housing defining a bore; an inspection port formed in the housing; a rotor including a plurality of radially-extending slots, the rotor being positioned within the bore; and a plurality of vanes corresponding to the plurality of slots in the rotor, each of the vanes being slideably received in a corresponding slot; an elongated wear calibration member including a first indicator mark at a position pre-calibrated to indicate that the wear calibration member is in contact with the rotor and therefore incorrectly inserted when inserted into the inspection port and a second indicator mark at a position from the end of the member pre-calibrated to indicate that the pump is worn and should be replaced when inserted into the inspection port; and a marking device slideably mounted on the elongated wear calibration member to provide a comparator to the first and second indicator marks; wherein the elongated member is inserted into the inspection port until the elongated member contacts a surface and the marking device is slid along the elongated member until the marking device contacts the housing to provide a mark comparable to the first and second indicator marks to indicate whether the elongated wear calibration member is inserted in a slot and whether the pump is worn.