closed when a rising liquid reaches a predetermined level (float-actuated valves F16K31/18)

Introduced: September 1968

Title

Titles differ between systems:

IPC: closed when a rising liquid reaches a predetermined level

CPC: closed when a rising liquid reaches a predetermined level (float-actuated valves F16K31/18)

Full Title

Full titles differ between systems:

IPC:

Fluid-delivery valves > Self-closing valves, i.e. closing automatically after operation > closed when a rising liquid reaches a predetermined level

CPC:

Fluid-delivery valves, (for liquid handling B67D; for flushing devices for water-closets or the like E03D) > Self-closing valves, i.e. closing automatically after operation > closed when a rising liquid reaches a predetermined level (float-actuated valves F16K31/18)

Of 2 combined children, 1 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

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F16K 21/185 CPC only CPC only
F16K 21/20 by means making use of air-suction through an opening closed by the rising liquid IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class F16,2013–2023, worldwide · Source: EPO PATSTAT

SCHAEFFLER TECHNOLOGIES & COMPANY DE 21,545
ZAHNRADFABRIK FRIEDRICHSHAFEN DE 9,446
TOYOTA MOTOR CORPORATION 7,215
HYUNDAI MOTOR COMPANY KR 6,846
ROBERT BOSCH DE 6,106
NTN CORPORATION 5,305
SKF SE 4,219
KIA MOTORS CORPORATION KR 3,852
NSK 3,850
HONDA MOTOR COMPANY 3,639

Top Applicants (CPC)

Class F16,2013–2023, worldwide · Source: EPO PATSTAT

SCHAEFFLER TECHNOLOGIES & COMPANY DE 22,817
ZAHNRADFABRIK FRIEDRICHSHAFEN DE 10,523
HYUNDAI MOTOR COMPANY KR 7,933
ROBERT BOSCH DE 7,059
KIA MOTORS CORPORATION KR 4,867
SKF SE 4,729
TOYOTA MOTOR CORPORATION JP 4,111
FORD GLOBAL TECHNOLOGIES US 3,838
GM GLOBAL TECHNOLOGY OPERATIONS US 3,575
TOYOTA MOTOR CORPORATION 3,499