| B | SK | PERFORMING OPERATIONS; TRANSPORTING |
| B61 | KL | RAILWAYS |
| B61K | UKL | OTHER AUXILIARY EQUIPMENT FOR RAILWAYS (energy-storing brakes B61H; protection of permanent way against weather influences E01B; rail cleaning, snow ploughs E01H) |
| B61K 1/00 | HGR | Transferring passengers, articles, or freight to and from moving trains; Slipping or coupling vehicles from or to moving trains |
| B61K 1/02 | UGR1 | | . | transferring articles to and from moving trains, e.g. mailbag catchers |
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| B61K 3/00 | HGR | Wetting or lubricating rails or wheel flanges |
| B61K 3/02 | UGR1 | | . | Apparatus therefor combined with vehicles |
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| B61K 5/00 | HGR | Apparatus for placing vehicles on the track; Derailers; Lifting or lowering rail vehicle axles or wheels (hoisting apparatus B66) |
| B61K 5/02 | UGR1 | | . | Devices secured to the vehicles; Turntables integral with the vehicles |
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| B61K 5/04 | UGR1 | | . | Devices secured to the track |
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| B61K 5/06 | UGR2 | | . . | Derailing or re-railing blocks |
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| B61K 7/00 | HGR | Railway stops fixed to permanent way; Track brakes or retarding apparatus fixed to permanent way; Sand tracks or the like (skids, wedges, vehicle-mounted scotch blocks B61H) |
| B61K 7/02 | UGR1 | | . | Track brakes or retarding apparatus (operating mechanisms for track-mounted scotch-blocks B61L) |
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| B61K 7/04 | UGR2 | |
| B61K 7/06 | UGR3 | | . . . | operated mechanically |
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| B61K 7/08 | UGR3 | | . . . | operated pneumatically or hydraulically |
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| B61K 7/10 | UGR2 | | . . | electrodynamic (on vehicles B60L) |
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| B61K 7/12 | UGR2 | | . . | electrically controlled |
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| B61K 7/14 | UGR1 | |
| B61K 7/16 | UGR1 | |
| B61K 7/18 | UGR2 | |
| B61K 7/20 | UGR2 | |
| B61K 7/22 | UGR2 | |
| B61K 9/00 | HGR | Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles |
| B61K 9/02 | UGR1 | | . | Profile gauges, e.g. loading gauges |
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| B61K 9/04 | UGR1 | | . | Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault |
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| B61K 9/06 | UGR2 | | . . | by detecting or indicating heat radiation from overheated axles |
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| B61K 9/08 | UGR1 | | . | Measuring installations for surveying permanent way (applications of measuring apparatus or devices for track-building purposes E01B 35/00; measuring techniques G01) |
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| B61K 9/10 | UGR2 | | . . | for detecting cracks in rails or welds thereof |
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| B61K 9/12 | UGR1 | | . | Measuring or surveying wheel-rims (measuring techniques G01) |
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| B61K 11/00 | HGR | Serving peculiar to locomotives, e.g. filling with, or emptying of, water, sand, or the like at the depots (lifting or lowering axles or wheels B61K 5/00; filling stations for steam or pneumatic accumulator locomotives B61C 8/00; water or fuel supply fittings on locomotives B61C 17/02; refuelling locomotives with solid fuels B65G 67/18; washing or cleaning boilers F28G) |
| B61K 11/02 | UGR1 | | . | Water columns for locomotives |
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| B61K 13/00 | HGR | Other auxiliaries or accessories for railways (safety belts or body harnesses A62B 35/00) |
| B61K 13/02 | UGR1 | | . | Starting aids for cars amplifying the draw-bar pull and transmitting it to the wheels |
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| B61K 13/04 | UGR1 | | . | Passenger-warning devices attached to vehicles; Safety devices for preventing accidents to passengers when entering or leaving vehicles |
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