Mobile crane hydraulic ground support - has ram valve shut by differential piston with larger face towards ram

The hydraulic jacking system is designed for the outriggers or pendulum-mounted axles of mobile cranes or excavators. It has one or more rams pressurised over a predetermined low pressure range by a control valve, or is hydraulically lockable by this valve. A valve (2) is mounted directly on the ram...

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Bibliographische Detailangaben
1. Verfasser:	DECHAMPS, CARL, 8000 MUENCHEN, DE
Format:	Patent
Sprache:	eng
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL TAPS THERMAL INSULATION IN GENERAL TRANSPORTING VALVES VEHICLE SUSPENSION ARRANGEMENTS VEHICLES IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	The hydraulic jacking system is designed for the outriggers or pendulum-mounted axles of mobile cranes or excavators. It has one or more rams pressurised over a predetermined low pressure range by a control valve, or is hydraulically lockable by this valve. A valve (2) is mounted directly on the ram (34) and has a plug (4), urged to open position by a spring and shut by a differential piston (6). The larger working face (15) of the piston faces towards the ram. Pref. the valve has separate inlet and outlet ducts, a connecting duct branching-off from the inlet to the outlet duct. The piston slides sealingly between the inlet and outlet ducts. PS.