F22D

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Description

PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER; FEED-WATER SUPPLY; CONTROLLING WATER LEVEL; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN BOILERS (chemical treatment of water, e.g. purification, C02F; enclosed heat-exchange apparatus in general F28D; controlling in general G05)

Subclasses

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Subclass Title
1/00 Feed-water heaters, e.g. preheaters
1/02 Feed-water heaters, e.g. preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways (heat-exchange tubes in general F28F)
1/04 Feed-water heaters, e.g. preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways (heat-exchange tubes in general F28F) the tubes having plain outer surfaces, e.g. in vertical arrangement
1/06 Feed-water heaters, e.g. preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways (heat-exchange tubes in general F28F) the tubes having plain outer surfaces, e.g. in vertical arrangement in horizontal arrangement
1/08 Feed-water heaters, e.g. preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways (heat-exchange tubes in general F28F) the tubes having fins, ribs, gills, corrugations, or the like on their outer surfaces, e.g. in vertical arrangement

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Recent Patents

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Recent Publications

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Publication #TitleFiling DatePub DatePatent Owner
2020/0066,244 SILENCER Oct 30, 19 Feb 27, 20 , TLV CO., LTD.

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Patents Issued To Date - By Filing Year

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