IPC Main Group
F15B 5/00 Transducers converting variations of physical quantities, e.g. expressed by variations in positions of members, into fluid-pressure variations or vice versa; Varying fluid pressure as a function of variations of a plurality of fluid pressures or variations of other quantities
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- Subclass:
- SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
Related Keywords
TRANSDUCERS for fluid-pressure systems
Top Applicants
Top 10 applicants by patent filingsfor class F15, 2013–2023, worldwide · Source: EPO PATSTAT
- ROBERT BOSCH DE 1,079
- SCHAEFFLER TECHNOLOGIES & COMPANY DE 980
- SMC CORPORATION JP 737
- HITACHI CONSTRUCTION MACHINERY COMPANY JP 674
- KYB CORPORATION JP 525
- CATERPILLAR US 461
- FESTO & COMPANY DE 451
- ZHEJIANG UNIVERSITY 448
- HITACHI CONSTRUCTION MACHINERY COMPANY 442
- XUZHOU HEAVY MACHINERY COMPANY 404