Leybold Aktiengesellschaft

Oerlikon Leybold Vacuum Gmbh

Axel Veit

Wilhelm Strasser

Markus Jung

Dieter Sous

Ernst Schnacke

Holger Dietz

Heinz-Josef Dubbelfeld

André Siegel

Jiri Melichar

Ernst Schilling

Axel Persch

Mario Pietrangeli

A refrigerator () has a housing (), a cylindrical working chamber (), a cylindrical displacing member (), a gap () which is located between the housing and the displacing member, a regenerator which is disposed inside the displacing member, and a device alternatingly supplying the working chamber with an effective high-pressure gas and an effective low-pressure gas. In order to overcome the disadvantages associated with gas streams occurring in the gap (), an additional regenerator (gap gas regenerator), () is assigned to the gap ().

Refrigerator comprising a regenerator

This invention concerns a method of operating a cryogenic cooling device (1) with a cylinder (4, 5) in which a piston (6, 7) reciprocates and with a gas drive (8, 9) which produces the motion of the piston. In order to reduce the vibrations which occur during operation, the invention proposes that the gas drive (8, 9) is controlled in such a way that the piston (6, 7) is only accelerated for part of the stroke.

Method of operating a cryogenic cooling device, and a cryogenic cooling

A throttle valve with a separate flange, usable with a vacuum pump defining an inlet opening, and a controllable throttle assembly for varying a flow passage cross section of the inlet opening. The throttle assembly is disposed in the inlet opening and has a plurality of slats rotatable about respective longitudinal axes for varying their inclination and an actuating rod for turning the slats. The flange has a throughgoing bore through which the actuating rod passes. The slats have a substantially constant width and their longitudinal axes are oriented parallel to one another. The slats form a first and a second slat group, and a linkage connects the slats with one another for turning the slats of the first slat group and the slats of the second slat group in opposite directions. A chamber is situated externally of the inlet opening and communicates with the throughgoing bore. A pivotal lever articulated to the actuating rod is situated in the chamber and projects outwardly therefrom. There is further provided a swingable bellows supported in the chamber and surrounding the pivotal lever for providing an airtight separation of at least one part of the pivotal lever from the chamber.

Controllable throttle for a vacuum pump

Growing community of inventors

Pulheim, Germany

Axel Veit