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IPC Subgroup
B66B 1/48

Adaptations of mechanically-operated limit switches

Introduced: September 1968

Last revised: January 2006

Full Title

Control systems of elevators in general > Details > Adaptations of switches or switchgear > Adaptations of mechanically-operated limit switches

Classification Context

Section:
PERFORMING OPERATIONS; TRANSPORTING
Class:
HOISTING; LIFTING; HAULING
Subclass:
ELEVATORS; ESCALATORS OR MOVING WALKWAYS

Additional Content

Applications of limit circuits or of limit-switch arrangement for controlling cranes, capstans, winches or tackles Capstans or winding mechanism using safety gear limit switches

Top Applicants

Top 10 applicants by patent filingsfor class B66, 2013–2023, worldwide · Source: EPO PATSTAT

  1. INVENTIO CH 3,843
  2. OTIS ELEVATOR COMPANY US 3,709
  3. SGCC(STATE GRID CORPORATION OF CHINA) 2,987
  4. KONE CORPORATION FI 2,922
  5. TOSHIBA ELEVATOR COMPANY 2,922
  6. HITACHI 2,321
  7. MITSUBISHI ELECTRIC CORPORATION JP 2,287
  8. MITSUBISHI ELECTRIC CORPORATION 1,870
  9. HITACHI BUILDING SYSTEMS COMPANY 1,700
  10. ANHUI HELI COMPANY 1,325