CPC Definition - Subclass E21F
This place covers:
Auxiliary machines and methods specifically adapted for use in underground mines or in tunnels.
This place does not cover:
Breathing aids for curative purposes | |
Respiratory apparatus | |
Breathing apparatus for accidentally buried persons |
This place covers:
Ventilation of mines or tunnels.
Distribution of ventilating currents.
This place does not cover:
Ventilating rooms or spaces in general |
This place covers:
Specific modes of longitudinal or transversal flow to ensure the renewal of fresh air inside the tunnel:
Evacuation of fumes caused by a fire:
This place does not cover:
Attention is drawn to the following places, which may be of interest for search:
Preventing escape of fumes using a central system | |
Railway stations | |
Railway tunnels | |
Means permanently installed along the road for removing or neutralising exhaust gases |
This place covers:
- Construction of ventilating ducts when the type of ventilation is determined by the ducts themselves.
- Mounting of ventilators:
Attention is drawn to the following places, which may be of interest for search:
Ventilators in general |
If the ventilation is for traffic tunnels, then the document is classified in E21F 1/003
This place covers:
Doors that can impede air circulation into a gallery, and can be opened when air circulation is necessary.
Safety doors for avoiding the extension of a fire or of smoke.
This place does not cover:
Air locks | |
Dam doors |
Attention is drawn to the following places, which may be of interest for search:
Doors in general |
If the ventilation is for traffic tunnels, then the document is classified in E21F 1/003
This place covers:
Fixed or adjustable constructions to regulate the flow of air into a gallery or among multiple galleries:
This place does not cover:
Dams |
Attention is drawn to the following places, which may be of interest for search:
Air locks for foundations |
If the ventilation is for traffic tunnels, then the document is classified in E21F 1/003
This place covers:
Covers for ventilation shafts.
Attention is drawn to the following places, which may be of interest for search:
Surface sealing of wellbores | |
Lining of shafts |
This place covers:
Reduction of dust in a mining atmosphere. Any means that can help prevent a fire from starting or from spreading.
This place does not cover:
Fire extinguishing equipment | |
Fire protection in buildings | |
Dust control in combination with mining machines |
Attention is drawn to the following places, which may be of interest for search:
Dams | |
Applying liquids or other fluent materials to surfaces in general |
This place covers:
Prevention of fires caused by ignition of coal dust and gas. A rock dust usually made of crushed limestone is sprayed to keep down the levels of coal dust.
This place covers:
Constructions for confining explosions:
This place covers:
Removal of dust from a mine atmosphere by using filters, cyclones or similar:
This place does not cover:
Dust-removing while slitting in mining operations |
This place covers:
Removal of gases for safety purposes
This place does not cover:
Production of coalbed methane | |
Gasification of coal underground |
This place covers:
Systems and operations for protecting workers in an underground environment in case of accidents, for gaining access to the area of the accident, or for bringing the workers to surface or to a safe environment.
This place does not cover:
Alarm devices |
Attention is drawn to the following places, which may be of interest for search:
Breathing aids for curative purposes | |
Respiratory apparatus | |
Revival apparatus |
This place covers:
Transport of staff, equipment or extracted rocks or minerals in underground operations. The transport can be vertical, inclined or horizontal. It can be continuous by conveyors or discontinuous by shuttle cars.
This main groups and its subgroups also includes the constructive details of scraper chain conveyors for collecting the coal as it is cut in longwall operations.
This place does not cover:
Attention is drawn to the following places, which may be of interest for search:
Mine cars |
In this place, the following terms or expressions are used with the meaning indicated:
Highwall mining | Method of mining by which a train typically formed by a continuous miner and multiple conveyors acting as pushbeams is propelled into a coal seam from the outside |
Attention is drawn to the following places, which may be of interest for search:
Crushing |
This place does not cover:
Transport of machines for slitting or completely freeing the mineral |
This place covers:
Means for transporting mined material to the surface or to some other point in the mine along one or more galleries:
This place does not cover:
Gathering at the working face |
This place covers:
Apparatuses for moving conveyors along a gallery as the working faces advances. Self-propelled conveyors are also included:
This place does not cover:
Guiding mining machines along conveyors for the cut mineral | |
Shifting conveyors in combination with mine roof supports for step-by-step movement |
This place covers:
Materials for filling up mine galleries and cavities. Machines for transporting and for placing the materials. Machines such as mixing bunkers for producing the filling-up materials that are adapted for use in an underground environment.
This place does not cover:
Dams | |
Chocks made of flexible containers filled with backfilling material |
Attention is drawn to the following places, which may be of interest for search:
Hydraulic cements |
This place does not cover:
A method or apparatus specific for use in mines must be disclosed in combination with the composition
Attention is drawn to the following places, which may be of interest for search:
Compositions of mortars, concrete or artificail stone |
Attention is drawn to the following places, which may be of interest for search:
Reinforcing elements for concrete cast in-situ for lining tunnels or galleries |
This place covers:
Gathering of water surrounding a subterranean formation. Extraction of water to the outside:
This place does not cover:
Keeping dry foundation sites or other areas in the ground | |
Waterproofing of tunnels |
This place covers:
Methods or devices for use in mines or tunnels, not covered elsewhere
Attention is drawn to the following places, which may be of interest for search:
Mine lighting | |
Tracing profiles of cavities or tunnels | |
Navigational instruments | |
Radar systems | |
Control of position of vehicles |
This place covers:
Constructions for sealing off underground volumes, such as inactive galleries.
This place does not cover:
Storing fluids in natural or artificial cavities or chambers in the earth | |
Excavation of large underground chambers |