Continuously self-compensating hydraulic positioner

A hydraulic positioner 10 comprises a cylinder 12, a piston chamber 32 in said cylinder closed at one end by an axially displaceable gland 24, a piston 30 axially reciprocable in said first chamber, a rod 16 axially connected to said piston and slidable through said gland, said rod moveable with sai...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	CLYDE R. PORTER
Format:	Patent
Sprache:	eng
Schlagworte:	AIRCRAFT ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSIONTRANSMISSIONS IN AIRCRAFT AVIATION BEDS BLASTING CHAIRS COFFEE MILLS COSMONAUTICS DOMESTIC ARTICLES OR APPLIANCES ENGINEERING ELEMENTS AND UNITS EQUIPMENT FOR FITTING IN OR TO AIRCRAFT FLYING SUITS FURNITURE GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HUMAN NECESSITIES LIGHTING MEANS FOR DAMPING VIBRATION MECHANICAL ENGINEERING PARACHUTES PERFORMING OPERATIONS SHOCK-ABSORBERS SOFAS SPICE MILLS SPRINGS SUCTION CLEANERS IN GENERAL THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A hydraulic positioner 10 comprises a cylinder 12, a piston chamber 32 in said cylinder closed at one end by an axially displaceable gland 24, a piston 30 axially reciprocable in said first chamber, a rod 16 axially connected to said piston and slidable through said gland, said rod moveable with said piston between an extended and a compressed condition, hydraulic fluid in said piston chamber, valve means 40 in said piston actuatable for allowing flow of said fluid across said piston, said valve means being normally closed for locking said piston and said rod against movement in said cylinder, first spring means 18 urging said rod to said extended condition, and second spring means 74 urging said gland against said fluid to compensate for changes in fluid volume in said chamber.