US 6,308,857 B1Granted

Vacuum chamber

AssigneeABB Patent GmbH

InventorsMarkus Heimbach, Dietmar Gentsch

Life of this patent

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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.

Claims21

Dependent claims

A vacuum chamber, comprising:

a plurality of covers each constructed in a cup-shaped fashion and having a main region with a first thickness and a free end with a second thickness being thinner than said first thickness and extending from said main region;
at least one insulating cylinder made from ceramic and having end faces each closed by one of said covers;
at least one support ring disposed between each of said covers and an end face of said end faces of said insulating cylinder, said free end of each of said covers firmly soldered to said end faces of said insulating cylinder with an interposition of said support ring there-between;
a movable contact stem;
a movable contact piece attached to said movable contact stem;
a fixed contact stem;
a fixed contact piece attached to said fixed contact stem, said movable contact piece attached to said movable contact stem and said fixed contact piece attached to said fixed contact, respectively, penetrating said covers;
and
a vacuum-tight sealing element fastened between one of said covers and said movable contact stem and permits a movement of said moveable contact stem, said sealing element having at least one layer connected to said one of said covers and said movable contact stem.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/592,298Filed 12 Jun 2000
Priority: DE 199 26 36910 Jun 1999
Granted: 30 Oct 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H01H 33/662
Vacuum switches: housings or protective screens
H01H 33/66207
Housings or protective screens: specific housing details, e.g. sealing, soldering or brazing
H01H 33/66261
Housings or protective screens: specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
H01H 2033/66215
Specific housing details, e.g. sealing, soldering or brazing: details relating to the soldering or brazing of vacuum switch housings