Skip to content
Search Classifications
Search for IPC and CPC classification codes or keywords
IPC Subgroup
F16L 21/02

with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings

Introduced: September 1968

Last revised: January 2006

Full Title

Joints with sleeve or socket > with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
Subclass:
PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL

Related Keywords

RING(S) sealings for pipe joints

5 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

  • F16L 21/025 Rolling sealing rings
  • F16L 21/03 placed in the socket before connection
  • F16L 21/035 placed around the spigot end before connection
  • F16L 21/04 in which sealing rings are compressed by axially-movable members
  • F16L 21/05 comprising a first ring being placed on a male part and a second ring in the sleeve or socket

Top Applicants

Top 10 applicants by patent filingsfor class F16, 2013–2023, worldwide · Source: EPO PATSTAT

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