Engine having a high pressure hydraulic system and low pressure lubricating system

Patent Number:	6,067,962
Issued:	May 30, 2000
Official Filing:	View the Complete Patent at the US Patent & Trademark Office
Abstract:	An engine includes a high pressure hydraulic system having a high pressure pump and at least one hydraulically-actuated device attached to an engine housing. A low pressure engine lubricating system is attached to the engine housing and includes a circulation conduit fluidly connected to an outlet from the high pressure pump.
Inventors:	Bartley; Bradley E. (Manito, IL), Blass; James R. (Bloomington, IL), Gibson; Dennis H. (Chillicothe, IL)
Assignee:	Caterpillar Inc. (Peoria, IL)
Application Number:	09/ 189,108
Filed:	November 10, 1998
Government Interests:	The Government has the rights in this invention pursuant to Contract No. DE-FC05-97OR22605-S-90,700 awarded by the U.S. Department of Energy.