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:
Nov. 02, 1993
Filed:
May. 19, 1992
Jan D Clarke, York, PA (US);
Steven A Bennis, Lancaster, PA (US);
Buford B Chidester, York, PA (US);
Gregory P Klidonas, York, PA (US);
Stephen E Klinger, Etters, PA (US);
Brian K Mohlman, Seven Valleys, PA (US);
Donald E Sweigart, II, Hunt Valley, MD (US);
FES, Inc., York, PA (US);
Abstract
A closed stainless steel tube is used to provide pressure and media isolation between the core and coils of a sensor in the form of a variable core transformer. The core is connected to and moved with a slide valve of a screw compressor and its actuating piston. The current output from the secondary coil is converted into a voltage, linearized and communicated to a microprocessor for controlling the position of the slide valve and thereby the loading of the compressor.