CHANGCHUN RAILWAY VEHICLES CO., LTD.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B23K SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM 291
 
  
 
A62B DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING 136
 
  
 
B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING 155
 
  
 
B23P OTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS 155
 
  
 
B25B TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING143
 
  
 
B61F RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES, ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING; WHEELS GUARDS; OBSTRUCTION REMOVERS OR THE LIKE 121
 
  
 
F16H GEARING199

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9636730 Apparatus for correcting upward deformation of large member of stainless steel car roofJul 12, 11May 02, 17[B21D]
9302355 Method of processing gear reduction boxApr 29, 13Apr 05, 16[B23P, F16H]
9260119 Full butt joint structure of connection joint between side frame and cross beam of bogie frame and assembly welding processMar 28, 13Feb 16, 16[B23K, B61F]
9073181 Combined positioning device for side beam of stainless steel car roofJul 12, 11Jul 07, 15[B25B, B23K]
8544602 Safety protection device for roof construction of train body assemblyDec 02, 11Oct 01, 13[B66F, A62B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2013/0259,587 PROCESSING METHOD FOR VARIABLE DEPTH, DEEP-HOLE DRILLING, CHIP BREAKING AND REMOVALAbandonedMay 24, 13Oct 03, 13[B23B]
2013/0236,245 FRAME ASSEMBLY BASE FOR FRAME STRUCTURESAbandonedJul 12, 11Sep 12, 13[F16B]
2012/0073,151 MOVABLE MEASURING RULER DEVICE FOR MEASURING EXTERNAL CONTOUR PRECISION OF VEHICLE BODYAbandonedDec 02, 11Mar 29, 12[B43L]
2012/0073,391 RAIN TEST DEVICE FOR WHOLE RAILWAY VEHICLEAbandonedDec 02, 11Mar 29, 12[G01M]
2012/0073,412 WEIGHT REDUCTION RE-PROFILING PROCESS AFTER DYNAMIC BALANCE FOR WHEEL SET OF PASSENGER TRAINAbandonedDec 02, 11Mar 29, 12[B23B]

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