Raychem Limited

Bbc Aktiengesellschaft Brown, Boveri & Cie

Edelwald Lutz

Horst Plettner

Gerhard Korner

Gerhard Koerner

Rudi Weingaertner

Egon Orth

A hydraulic drive includes a pressure housing having a blind axial recess formed therein with a wall and a bottom, an accumulator piston with first and second opposite ends disposed in the recess, an energy accumulator in the form of springs disposed symmetrical to the central axis of the accumulator piston for continuously engaging the accumulator piston braced against the springs, a working piston in the form of a differential piston guided in the recess having a piston rod passing through the accumulator piston and disposed centrally in the pressure housing, the piston rod, the pressure housing and the accumulator piston defining the wall of the recess, the piston rod, the pressure housing, the first end of the accumulator piston and the working piston defining an accumulator space in the form of a hydraulic accumulator providing pressure energy for the hydraulic drive without requiring an external energy supply, the second end of the accumulator piston and the wall and the bottom of the recess defining a plenum for receiving spent hydraulic fluid at low pressure, and the accumulator piston separating the accumulator space from the plenum.

Hydraulic drive

A hydraulic accumulator for providing pressurized fluid for a hydraulic system, includes a cylinder, a piston movably disposed in the cylinder defining a space in the cylinder on one side of the piston for pressurized fluid, and a mechanical spring device connected to the piston for generating pressure in the pressurized fluid.

Hydraulic accumulator for providing pressurized fluid

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Rodgau, Germany

Edelwald Lutz