Patent Number: 6,308,857

Title: Vacuum chamber

Abstract: A vacuum chamber having at least one insulating cylinder whose end faces are closed with the aid of one cover each is described. The vacuum chamber has a movable contact stem and a movable contact piece that is attached thereto and opposite which there is a correspondingly constructed a fixed contact piece. Fastened in a vacuum-tight fashion between the one cover and the movable contact stem is a sealing element which permits movement of the contact stem and is constructed as a bellows. The cover is of cup-shaped construction in this case, and is fastened with its free edge end, which has a section of reduced wall thickness, on the end face of the insulating body, a support ring being provided which produces a mechanical reinforcement in the region of the connection of the free edge of the cover to the insulating body. Moreover, the bellows is also of multi-layered construction, if appropriate. The vacuum chamber is capable of withstanding pressures of up to 25 bars given suitable dimensioning of the support ring and of the cover as well as of the bellows.

Inventors: Heimbach; Markus (Dusseldorf, DE), Gentsch; Dietmar (Ratingen, DE)

Assignee: ABB Patent GmbH

International Classification: H01H 33/662 (20060101); H01H 33/66 (20060101); F17C 001/00 ()

Expiration Date: 10/30/2018