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US 2008/0174282 A1Published application
Power supply device
AssigneeYokogawa Electric Corporation
InventorsToshiyuki Kano, Toshiyuki Iai
Life of this patent
Estimating the term…
Abstract
A power generator is connected with an air pipe through which compressed air is supplied to drive a valve arranged in a plant. The power generator generates power by utilization of the difference between the pressure of the compressed air and the atmospheric pressure. The power generator is used as a supply source of electricity to the battery or a power source to a wireless sensor. The battery is used as a power source for the wireless sensor.
Claims7
A power supply device for supplying electric power to a field device, the power supply device comprising:
- an air pipe;
- and
- a power generator that generates electric power under positive or negative pressure of a gas in the air pipe.
Dependencies are inferred from the claim text.