1. CPC Sections
  2. CPC Section B
  3. CPC Class B61
  4. CPC Subclass B61K
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Version: 2026.01
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CPC
COOPERATIVE PATENT CLASSIFICATION
B61K
AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR [2026-01]
B61K 1/00
Transferring passengers, articles, or freight to and from moving trains; Slipping or coupling vehicles from or to moving trains [2013-01]
B61K 1/02
.
transferring articles to and from moving trains, e.g. mailbag catchers [2013-01]
B61K 3/00
Wetting or lubricating rails or wheel flanges [2013-01]
B61K 3/02
.
Apparatus therefor combined with vehicles [2013-01]
B61K 5/00
Apparatus for placing vehicles on the track; Derailers; Lifting or lowering rail vehicle axles or wheels [2026-01]
B61K 5/02
.
Devices secured to the vehicles; Turntables integral with the vehicles [2013-01]
B61K 5/04
.
Devices secured to the track [2013-01]
B61K 5/06
. .
Derailing or re-railing blocks [2013-01]
B61K 7/00
Railway stops fixed to permanent way; Track brakes or retarding apparatus fixed to permanent way; Sand tracks or the like [2026-01]
B61K 7/02
.
Track brakes or retarding apparatus [2026-01]
B61K 7/025
. .
{Retarders of the mushroom type} [2013-01]
B61K 7/04
. .
with clamping action [2013-01]
B61K 7/06
. . .
operated mechanically [2013-01]
B61K 7/08
. . .
operated pneumatically or hydraulically [2013-01]
B61K 7/10
. .
electrodynamic {(B61K 7/025 takes precedence)} [2026-01]
B61K 7/12
. .
electrically controlled {(B61K 7/025 takes precedence)} [2013-01]
B61K 7/14
.
Sand or like tracks [2013-01]
B61K 7/16
.
Positive railway stops [2013-01]
B61K 7/18
. .
Buffer stops [2013-01]
B61K 7/20
. .
Positive wheel stops [2013-01]
B61K 7/22
. .
Axle stops [2013-01]
B61K 9/00
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 [2013-01]
B61K 9/02
.
Profile gauges, e.g. loading gauges [2013-01]
B61K 9/04
.
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 [2013-01]
B61K 9/06
. .
by detecting or indicating heat radiation from overheated axles [2013-01]
B61K 9/08
.
Measuring installations for surveying permanent way [2026-01]
B61K 9/10
. .
for detecting cracks in rails or welds thereof [2013-01]
B61K 9/12
.
Measuring or surveying wheel-rims [2026-01]
B61K 11/00
Serving peculiar to locomotives, e.g. filling with, or emptying of, water, sand or the like at the depots [2026-01]
B61K 11/02
.
Water columns for locomotives [2013-01]
B61K 13/00
Other auxiliaries or accessories for railways [2026-01]
B61K 13/02
.
Starting aids for cars amplifying the draw-bar pull and transmitting it to the wheels [2026-01]
B61K 13/04
.
Passenger-warning devices attached to vehicles; Safety devices for preventing accidents to passengers when entering or leaving vehicles [2026-01]