responsive to abnormal operating conditions

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Applications of checking, fault-correcting or safety devices in elevators > responsive to abnormal operating conditions

CPC:

Applications of checking, fault-correcting, or safety devices in elevators > responsive to abnormal operating conditions

Of 8 combined children, 5 exist in both systems.

3 codes are CPC-only extensions.

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B66B 5/021 +3 CPC CPC only CPC only
B66B 5/027 CPC only CPC only
B66B 5/028 CPC only CPC only
B66B 5/04 for detecting excessive speed +3 CPC IPC+CPC Available in IPC and CPC
B66B 5/08 for preventing overwinding IPC+CPC Available in IPC and CPC
B66B 5/12 in case of rope or cable slack +1 CPC IPC+CPC Available in IPC and CPC
B66B 5/14 in case of excessive loads +1 CPC IPC+CPC Available in IPC and CPC
B66B 5/16 Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well IPC+CPC Available in IPC and CPC

Class B66,2013–2023, worldwide · Source: EPO PATSTAT

Class B66,2013–2023, worldwide · Source: EPO PATSTAT