Hydraulic cylinder, in particular prop, with a combined function

A hydraulic cylinder consists of the outer cylinder (11), at least one inner cylinder (12) arranged therein, as well as the valve system, in case of necessity the rapid yield valve(s) and other safety valve(s). The hydraulic cylinder according to the invention can be characterized in that between th...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	TAMAS KOVACS, MIKLOS PETRASSY, OTTO LUKONITS, CSABA PINTER
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING EARTH DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GALLERIES GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LARGE UNDERGROUND CHAMBERS LIGHTING MEANS FOR DAMPING VIBRATION MECHANICAL ENGINEERING MINING SHAFTS SHOCK-ABSORBERS SPRINGS THERMAL INSULATION IN GENERAL TUNNELS WEAPONS
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Beschreibung
Zusammenfassung:	A hydraulic cylinder consists of the outer cylinder (11), at least one inner cylinder (12) arranged therein, as well as the valve system, in case of necessity the rapid yield valve(s) and other safety valve(s). The hydraulic cylinder according to the invention can be characterized in that between the outer cylinder (11) and the inner cylinder (12) there is a hydraulic pressure space (13) which is connected to a pneumatic gas pressure space (14) for cushioning shock loadings and in the hydraulic pressure space (13) there is a hollow extension (17) which fits into the inner cylinder (12) to effect end of stroke damping. In a preferred embodiment the gas space (14) is formed in the inner cylinder (12) and/or in the hollow extension (17) and the gas space (14) and the hydraulic pressure space (13) are separated by a piston (15).