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IPC Subgroup
B66D 1/48

automatic

Introduced: September 1968

Last revised: January 2006

Full Title

Rope, cable, or chain winding mechanisms; Capstans > Other constructional details > Control devices > automatic

Classification Context

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

Related Keywords

LIMIT switches for lift systemscontrolling TENSION in winch systems

2 direct subcodes

Child Classifications

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  • B66D 1/5 for maintaining predetermined rope, cable, or chain tension, e.g. in ropes or cables for towing craft, in chains for anchors; Warping or mooring winch-cable tension control
  • B66D 1/52 for varying rope or cable tension, e.g. when recovering craft from water

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