F04B 9/123 having only one pumping chamber
Full Title
Piston machines or pumps characterised by the driving or driven means to or from their working members > the means being fluid > the fluid being elastic, e.g. steam or air > having only one pumping chamber
Filing statistics
CPC F04B 9/123 belongs to the parent subclass F04B, which recorded 98,292 patent applications worldwide between 2013 and 2023. Annual filings grew from 6,699 in 2013 to 8,239 in 2023 (+23%), peaking at 10,621 applications in 2016. The most active applicants in class F04 are LG ELECTRONICS (3,855 applications), ROBERT BOSCH (3,549 applications) and GREE ELECTRIC APPLIANCES (2,273 applications).
Source: EPO PATSTAT, worldwide filings
3 direct subcodes
Child Classifications
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- F04B 9/125 reciprocating movement of the pumping member being obtained by a double-acting elastic-fluid motor
- F04B 9/127 rectilinear movement of the pumping member in the working direction being obtained by a single-acting elastic-fluid motor, e.g. actuated in the other direction by gravity or a spring
Top Applicants
Top 10 applicants by patent filingsfor class F04, 2013–2023, worldwide · Source: EPO PATSTAT
- LG ELECTRONICS KR 3,855
- ROBERT BOSCH DE 3,549
- GREE ELECTRIC APPLIANCES 2,273
- GE (GENERAL ELECTRIC COMPANY) US 2,126
- MITSUBISHI ELECTRIC CORPORATION JP 1,881
- UNITED TECHNOLOGIES CORPORATION (UTC) US 1,866
- SAFRAN AIRCRAFT ENGINES FR 1,499
- MITSUBISHI HEAVY INDUSTRIES JP 1,258
- TOYOTA INDUSTRIES CORPORATION JP 1,247
- ATLAS COPCO AIRPOWER BE 1,168