Pressure responsive hydraulic control circuit

Patent · Tue Jul 19 00:00:00 EDT 1988

OSTI ID:6846733

Burchartzmeyer, J J

A pressure responsive hydraulic control circuit for controlling a hydraulic motor is described comprising; a directional control valve having an inlet port, an outlet port and a pair of motor ports; a source of variable pressure fluid; a supply conduit connecting the source of variable pressure fluid to the inlet port; a pair of motor conduits connecting the motor ports with respective sides of the hydraulic motor; a pair of makeup valves connected to the respective motor conduits; an exhaust conduit connected to the pair of makeup valves; and means for communicating pressurized fluid from the supply conduit to the exhaust conduit and super-charging the makeup valves only when the directional control valve is in the neutral position.

• Assignee: Caterpiller Inc., Peoria, IL
• Patent Number(s): US 4757685
• OSTI ID: 6846733
• Resource Relation: Patent File Date: Filed date 24 Aug 1987
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
HYDRAULIC EQUIPMENT
CONTROL SYSTEMS
INTERNAL COMBUSTION ENGINES
COMPRESSIBLE FLOW
EXHAUST SYSTEMS
HYDRAULICS
OPERATION
PRESSURE CONTROL
SUPERCHARGERS
VALVES
COMPRESSORS
CONTROL
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUID MECHANICS
HEAT ENGINES
MECHANICS
330100* - Internal Combustion Engines