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IPC Subgroup
B66D 1/18

and the power being transmitted from a continuously-operating and irreversible prime mover

Introduced: September 1968

Last revised: January 2006

Full Title

Rope, cable, or chain winding mechanisms; Capstans > Driving gear > Power transmissions between power sources and drums or barrels > the drums or barrels being freely rotatable > and the power being transmitted from a continuously-operating and irreversible prime mover

Classification Context

Section:
PERFORMING OPERATIONS; TRANSPORTING
Class:
HOISTING; LIFTING; HAULING
Subclass:
CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS

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