F23H GRATES (inlets for fluidisation air for fluidised bed combustion apparatus F23C10/20); CLEANING OR RAKING GRATES
Description
F23H covers mechanical grates used in combustion apparatus and devices for their maintenance. This classification encompasses fixed and moving grates designed to support fuel in furnaces, boilers, and fireplaces, as well as mechanisms for cleaning, raking, or removing ash and clinker from grate surfaces during operation. The scope includes grate constructions, support structures, and powered or manual cleaning systems integrated with or retrofitted to combustion equipment. Related combustion apparatus classifications (such as F23B for furnace structures) are distinguished by their focus on the overall combustion chamber rather than the grate element itself.
11 direct subcodes
Child Classifications
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- F23H 1/00 Grates with solid bars (double grates F23H5/00)
- F23H 11/00 Travelling-grates
- F23H 13/00 Grates not covered by any of groups F23H1/00-F23H11/00
- F23H 15/00 Cleaning arrangements for grates (not forming part of the grate F23J1/00); Moving fuel along grates (grates with bars rocked about their longitudinal axes and specially adapted for moving fuel along the grate F23H9/10; for travelling-grates F23H11/22)
- F23H 17/00 Details of grates
- F23H 2700/00 Grates characterised by special features or applications
- F23H 2900/00 Special features of combustion grates
- F23H 3/00 Grates with hollow bars
- F23H 5/00 Double grates
- F23H 7/00 Inclined grates (inclined travelling grates F23H11/12)
- F23H 9/00 Revolving-grates; Rocking or shaking grates (inclined grates F23H7/00)
Top Applicants
Top 10 applicants by patent filingsfor class F23, 2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 2,581
- UNITED TECHNOLOGIES CORPORATION (UTC) US 1,180
- SIEMENS DE 1,157
- GE (GENERAL ELECTRIC COMPANY) 994
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 769
- MITSUBISHI HEAVY INDUSTRIES JP 701
- MITSUBISHI HITACHI POWER SYSTEMS JP 695
- RAYTHEON TECHNOLOGIES CORPORATION US 587
- NINGBO FOTILE KITCHENWARE COMPANY 543
- GENERAL ELECTRIC TECHNOLOGY CH 490