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CPC Subgroup
G05D 13/10

Centrifugal governors with fly-weights

Full Title

Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover > without auxiliary power > Centrifugal governors with fly-weights

Filing statistics

CPC G05D 13/10 belongs to the parent subclass G05D, which recorded 227,290 patent applications worldwide between 2013 and 2023. Annual filings grew from 7,629 in 2013 to 16,612 in 2023 (+118%), peaking at 30,148 applications in 2019. The most active applicants in class G05 are FANUC (6,367 applications), SIEMENS (5,963 applications) and FANUC (4,535 applications).

Source: EPO PATSTAT, worldwide filings

7 direct subcodes

Child Classifications

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  • G05D 13/18 counterbalanced by spider springs acting immediately upon the fly-weights
  • G05D 13/20 counterbalanced by spider springs acting upon the articulated riser
  • G05D 13/22 counterbalanced by fluid pressure acting upon the articulated riser
  • G05D 13/24 counterbalanced by two or more different appliances acting simultaneously upon the riser, e.g. with both spring force and fluid pressure or with both spring force and electromagnetic force
  • G05D 13/26 with provision for modulating the degree of non-uniformity of speed
  • G05D 13/28 with provision for performing braking effects in case of increased speed

Top Applicants

Top 10 applicants by patent filingsfor class G05, 2013–2023, worldwide · Source: EPO PATSTAT

  1. FANUC JP 6,367
  2. SIEMENS DE 5,963
  3. FANUC 4,535
  4. MITSUBISHI ELECTRIC CORPORATION JP 4,201
  5. ROBERT BOSCH DE 4,010
  6. LG ELECTRONICS KR 3,802
  7. SAMSUNG ELECTRONICS COMPANY KR 3,143
  8. FORD GLOBAL TECHNOLOGIES US 2,889
  9. TOYOTA MOTOR CORPORATION 2,778
  10. OMRON CORPORATION JP 2,743