Allegheny Valve Company

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Warren, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Safety valving for cargo tanks used for bulk transportation of haza...
- Patent number 4,508,131
- Issue date Apr 2, 1985
- Allegheny Valve Company
- Joseph H. DeFrees
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Discharge control means for a storage tank for liquid
- Patent number 4,457,486
- Issue date Jul 3, 1984
- Allegheny Valve Company
- Joseph H. DeFrees
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Stuffing box with O-ring detent for control mechanism of emergency...
- Patent number 4,453,698
- Issue date Jun 12, 1984
- Allegheny Valve Company
- Joseph H. DeFrees
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Air check valve assembly for powdered bulk product transport
- Patent number 4,445,533
- Issue date May 1, 1984
- Allegheny Valve Company
- Joseph H. DeFrees
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...