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:
Oct. 16, 1990
Filed:
Mar. 17, 1989
Kenneth B Sugden, Rockford, IL (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
An oil management system (80) for a case (12) containing at least one rotating element which requires a supply of pressurized oil during rotation in accordance with the invention includes an oil sump (16) within the case for collecting oil after lubrication of the at least one rotating element; a tank (82) within the case for containing oil during lubrication of the at least one rotating element; a first pump (32) having an inlet (90) for supplying pressurized oil to the at least one rotating element; a second pump (26) having an inlet coupled to the sump and at least one outlet (84 and 88) coupled to the first pump for providing pressurized oil to the inlet of the first pump and to an outlet (93) of the tank; the outlet from the tank being coupled to the at least one outlet of the second pump, the tank being disposed above the second pump for providing a pressure head at the at least one outlet of the tank during a non-inverted operation which opposes pressure produced by the second pump; and when oil pressure at the at least one outlet the second pump is greater than the oil pressure at the outlet of the tank, the second pump provides pressurized oil to the tank and to the inlet of the first pump and when oil pressure at the at least one outlet of the second pump is less than oil pressure at the outlet of the tank, oil from the tank flows to the at least one inlet of the first pump.