The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 1993
Filed:
Sep. 04, 1990
Lawrence J Rhoades, Pittsburgh, PA (US);
Ralph L Resnick, Slickville, PA (US);
John R Rose, Pittsburgh, PA (US);
Extrude Hone Corporation, Irwin, PA (US);
Abstract
The surface parameters and characteristics of a conductive workpiece are determined by applying a voltage between the workpiece and a capacitance probe having proximity sensing capabilities, and moving the probe in two or three co-ordinate axes relative to the workpiece while measuring the capacitance between the probe and workpiece, and controlling the probe velocity and/or direction within a stand-off band adjacent to the workpiece as a function of the capacitance value measured for purposes of effecting significant real time process controls, and determining the workpiece surface parameters as a function of the probe movement and capacitance measured.