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:
Sep. 03, 1996
Filed:
Dec. 19, 1994
Thomas W Baehler, Rockford, IL (US);
Henry R Vanderzyden, Byron, IL (US);
Kenneth N Baker, Rockford, IL (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
A method of increasing service life of an oil comprises placing a quantity of oil within a circuit, and placing a filter in the circuit, the filter having surfaces including interstices which contain a quantity of a liquid additive at a time of placement in the circuit, the additive being washed from the interstices of the filter into solution with the oil during filling and operation of the circuit to form a mixture of the oil and additive which reduces the formation of metallo-organic soaps. The oil may be an synthetic ester based oil or a mineral oil. The additive either reacts with an organic acid formed from hydrolysis of the oil during operation of the circuit to neutralize the acid, or alternatively the additive coats metallic wear particles formed during operation of the circuit so that organic acids formed from hydrolysis of the oil during operation of the circuit cannot attach thereto. A filter in accordance with the instant invention comprises an input for receiving oil and an output for discharging oil, and an element through which oil flows from the input to the output with the element having surfaces including interstices which contain a quantity of liquid additive at a time of placement in the circuit, the quantity of liquid additive being washed from the interstices of the filter into solution with the oil during filling and operation of an oil circuit to form a mixture of the oil and additive which reduces the formation of metallo-organic soaps.