F23H GRATES; CLEANING OR RAKING GRATES
Introduced: September 1968
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- COMBUSTION APPARATUS; COMBUSTION PROCESSES
- Subclass:
- GRATES; 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.
Related Keywords
9 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- F23H 1/00 Grates with solid bars
- F23H 11/00 Travelling grates
- F23H 13/00 Grates not covered by any of groups
- F23H 15/00 Cleaning arrangements for grates; Moving fuel along grates
- F23H 17/00 Details of grates
- F23H 3/00 Grates with hollow bars
- F23H 5/00 Double grates
- F23H 7/00 Inclined grates
- F23H 9/00 Revolving grates; Rocking or shaking grates
Top Applicants
Top 10 applicants by patent filingsfor class F23, 2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 2,124
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 1,369
- NINGBO FOTILE KITCHENWARE COMPANY 1,363
- SIEMENS DE 997
- UNITED TECHNOLOGIES CORPORATION (UTC) US 937
- GE (GENERAL ELECTRIC COMPANY) 898
- VATTI 815
- CHINESE ACADEMY OF SCIENCES 719
- RINNAI COMPANY 708
- MITSUBISHI HITACHI POWER SYSTEMS 670