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. 13, 2007
Filed:
Jan. 26, 2004
Thomas M. Wall, Nashville, TN (US);
Daniel D. Green, Nashville, TN (US);
Thomas M. Wall, Nashville, TN (US);
Daniel D. Green, Nashville, TN (US);
Other;
Abstract
Debris is filtered from refrigerant in a refrigerant system by: (1) installing a filtration apparatus in the high pressure side of a refrigerant system, the apparatus comprising a filtration housing having primary and secondary passages, a primary filter disposed in the primary passage, and a diverter means for selectively directing refrigerant flow through either the primary or the secondary circuit passages; (2) directing refrigerant flow through the primary circuit passage; (3) operating the refrigerant system until a shifting parameter is obtained; and (4) operating the diverter means so as to direct refrigerant flow to the secondary circuit passage. Optionally, a secondary filter is disposed in the secondary filter channel. In alternate methods, the shifting parameter comprises one of: elapsed time of operation of the system; selected differential pressure across the primary filter; or a selected compressor discharge pressure above said normal compressor discharge pressure.