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:
Apr. 09, 2002
Filed:
Apr. 19, 2001
Jay Lowell Hanson, Bloomington, MN (US);
Steven Bruce Helgeson, Lakeville, MN (US);
Thermo King Corporation, Minneapolis, MN (US);
Abstract
A method of controlling the operation of an electronic throttling valve in a temperature control unit having first and second pressure measurement devices. The method includes determining whether the first pressure measurement device is functioning, determining whether the second pressure measurement device is functioning, controlling the electronic throttling valve using data measured by both the first and second pressure measurement devices when both the first and second pressure measurement devices functioning, controlling the electronic throttling valve using data measured by only one of the first and second pressure measurement devices when the other of the first and second pressure measurement devices is determined to be non-functional, and controlling the electronic throttling valve using temperature data measured by the temperature control unit when both the first and second pressure measurement devices are determined to be non-functional.