GEORGE W MINKKINEN
Engineering in Fitchburg, MA
License number
Massachusetts 21545
Issued Date
Sep 29, 1967
Expiration Date
Jun 30, 2002
Type
Mechanical Engineer
Address
Address
Fitchburg, MA 01420
Professional information
Dual Pressure Level Oil Supply System
US Patent:
3991564, Nov 16, 1976
Filed:
Feb 25, 1976
Appl. No.:
5/661169
Inventors:
Harry A. Mayor - Fitchburg MA
George W. Minkkinen - Fitchburg MA
George W. Minkkinen - Fitchburg MA
Assignee:
General Electric Company - Schenectady NY
International Classification:
F16D 3106
US Classification:
60325
Abstract:
A hydraulic fluid supply system includes a single motor driven pump which supplies a dual pressure level output for providing both a high pressure oil output and a low pressure oil output. In combination with a turbomachine, the dual pressure level output of the oil pump obviates the requirement of pressure reducing valves in the low pressure supply lines and losses associated therewith. Moreover, since only a portion of the entire oil requirement is raised to the higher pressure level, the pump motor horsepower requirements are reduced to save energy and thereby improve overall system efficiency. A further improvement is a system of pressure differential valves whereby under certain conditions, high pressure oil flow is conserved even though the low pressure oil flow momentarily drops below a preset value.