for controlling the speed (F15B11/024 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: for controlling the speed

CPC: for controlling the speed (F15B11/024 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Servomotor systems without provision for follow-up action > Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member > for controlling the speed

CPC:

Servomotor systems without provision for follow-up action; (F15B3/00 takes precedence) > Systems essentially incorporating special features for controlling the speed or actuating force of an output member > for controlling the speed (F15B11/024 takes precedence)

Of 6 combined children, 4 exist in both systems.

2 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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F15B 11/0406 CPC only CPC only
F15B 11/0413 CPC only CPC only
F15B 11/042 by means in the feed line (F15B11/046, F15B11/05 take precedence) since 1995 +2 CPC IPC+CPC Available in IPC and CPC
F15B 11/044 by means in the return line (F15B11/046, F15B11/05 take precedence) since 1995 +1 CPC IPC+CPC Available in IPC and CPC
F15B 11/046 depending on the position of the working member since 1995 IPC+CPC Available in IPC and CPC
F15B 11/05 specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive +1 CPC IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class F15,2013–2023, worldwide · Source: EPO PATSTAT

ROBERT BOSCH DE 1,079
SCHAEFFLER TECHNOLOGIES & COMPANY DE 980
SMC CORPORATION JP 737
HITACHI CONSTRUCTION MACHINERY COMPANY JP 674
KYB CORPORATION JP 525
CATERPILLAR US 461
FESTO & COMPANY DE 451
ZHEJIANG UNIVERSITY 448
HITACHI CONSTRUCTION MACHINERY COMPANY 442
XUZHOU HEAVY MACHINERY COMPANY 404

Top Applicants (CPC)

Class F15,2013–2023, worldwide · Source: EPO PATSTAT

ROBERT BOSCH DE 1,281
SMC CORPORATION JP 865
HITACHI CONSTRUCTION MACHINERY COMPANY JP 814
KYB CORPORATION JP 584
SCHAEFFLER TECHNOLOGIES & COMPANY DE 536
CATERPILLAR US 532
FESTO & COMPANY DE 486
JOHN DEERE US 419
KAWASAKI HEAVY IND JP 368
HAMILTON SUNDSTRAND US 368