with variable-area piston

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Patents Grantslast 30 patents

Information Patent Grant
Puffer interrupter with main and auxiliary pistons and common cylinder
- Patent number 4,103,131
- Issue date Jul 25, 1978
- Sprecher & Schuh Ltd. (SSA)
- Rudolf Graf
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Gas-blast switch
- Patent number 4,011,421
- Issue date Mar 8, 1977
- Sprecher & Schuh AG
- Richard Thaler
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Puffer-type gas-blast circuit-interrupter having variable-area stat...
- Patent number 3,987,262
- Issue date Oct 19, 1976
- Westinghouse Electric Corporation
- Joseph R. Rostron
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
3881079
- Patent number 3,881,079
- Issue date Apr 29, 1975
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
3829641
- Patent number 3,829,641
- Issue date Aug 13, 1974
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
3786215
- Patent number 3,786,215
- Issue date Jan 15, 1974
- H01 - BASIC ELECTRIC ELEMENTS