Spool valve for hydraulic system - has sealing rings between chambers around inner sleeve and between spool sections

The spool valve for e.g. a hydraulic circuit, has a spool (3) down the centre which slides axially inside a sleeve (2) inside the housing (1). The sleeve has grooves (6, 8, 10) around it communicating through radial holes (5, 7, 13) with the spool chamber and communicating also with a working line (...

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Bibliographische Detailangaben
1. Verfasser:	HAERTWIG,MANFRED
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	The spool valve for e.g. a hydraulic circuit, has a spool (3) down the centre which slides axially inside a sleeve (2) inside the housing (1). The sleeve has grooves (6, 8, 10) around it communicating through radial holes (5, 7, 13) with the spool chamber and communicating also with a working line (A), the tank (T) and the pump (P) respectively. Movement of the piston connects the latter lines selectively via a chamber (4) near the middle of the spool. The spool also has grooves (12, 19, 20) around it, for sealing rings. The spool has two grooves (12, 19) near the return spring end, and one (20) near the other end, with the chamber (4) between them. There are further sealing rings inset in the sleeve (2) between its chambers.