Robert Boschgmbh

Denison Hydraulik Gmbh

Bernd Killing

Wolfgang Backe

Christoph Latour

A bubble storing device for storing a liquid under pressure has a container having an interior, a bubble composed of an elastic material and located in the container so as to subdivide the interior into a liquid chamber and a gas chamber, a gas valve and a liquid valve provided in the container and associated with a respective one of the zones. The bubble has at least two zones located one after the other in a longitudinal direction of the bubble and composed of different material, the zones including a first zone which is associated with the gas valve and composed of a material which is substantially insensitive to thermal loads, and a second zone which is associated with the liquid valve and composed of a material which is substantially insensitive to mechanical loads.

Bubble storing device with bubble having different zones

A directly controlled hydraulic pressure valve includes a valve housing and an outer valve sleeve which is placed in a port of the valve housing. The port is closed by a cover. A cylindrical inflow component is arranged in the interior of the valve sleeve. The inflow component has a first portion whose diameter is smaller than the internal diameter of the valve sleeve and a second portion having a greater diameter, wherein the outer valve sleeve rests with its end face against the second portion. The pressure valve further includes a cup-shaped tubular piston which is longitudinally movably arranged in an annular space between the valve sleeve and the inflow component, wherein the bottom of the tubular piston is located remote from the second portion. An annular groove is formed in the first portion of the inflow component. Axially extending inflow ducts are provided in the end face of the second portion of the inflow component. The inflow ducts connect the annular groove to an inflow bore in the valve housing. A deflection chamber is formed at the outer circumference of the first portion of the inflow component and adjacent the second portion, wherein the deflection chamber is in communication with outlet openings formed in the valve sleeve. The valve control edges are formed by an edge of the annular groove and an adjacent edge of the tubular piston. The valve further includes a device for exerting a force on the inflow component in a direction which is directed opposite the direction of the pressure force in the inflow bore.

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Erkrath, Germany

Bernd Killing