US Patent No: 7,304,262
Number of patents in Portfolio can not be more than 2000
Vacuum encapsulation having an empty chamber
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Dec 4, 2007
Issued date -
Mar 16, 2004
filing date -
10/802,409
serial no -
In Force
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Importance
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Abstract
A vacuum assembly including a vacuum interrupter may be sealed with a compliant material and/or rubber plugs, so that a cavity is created and maintained within the assembly for use with a current exchange housing and/or bellows, during operation of the vacuum interrupter. During vacuum molding of the vacuum assembly to encapsulate the vacuum assembly in an epoxy, a resulting pressure differential caused by the vacuum molding is prevented from disturbing the seal around the vacuum assembly, by way of a needle or tube included in the seal. In this way, air from within the cavity is allowed to escape, while the epoxy is prevented from entering the cavity. Then, once encapsulation is complete, the vacuum assembly can be joined with an operating rod and other components to complete a vacuum switching device.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,597,992 Current interchange for vacuum capacitor switch | 18 | 1996 | |
| 5,747,765 Vertical antitracking skirts | 34 | 1996 | |
| 5,917,167 Encapsulated vacuum interrupter and method of making same | 51 | 1997 | |
| 6,331,687 Control method and device for a switchgear actuator | 20 | 1998 | |
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| 4,568,804 High voltage vacuum type circuit interrupter | 73 | 1983 | |
Patent Citation Ranking
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