Description
POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS (positive-displacement engines for liquids and elastic fluids F01; positive-displacement machines for liquids F04; fluid-pressure actuators F15B; fluid gearing F16H)
F03C
Technology
Sub-Class
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- 13 921 US PATENTS IN FORCE
- 21 US APPLICATIONS PENDING
- 572 Total Patent Owners
- 2647 TOTAL INVENTORS
Subclasses
| Subclass | Title |
|---|---|
| 1/00 | Reciprocating-piston liquid engines |
| 1/007 | Reciprocating-piston liquid engines with single cylinder, double-acting piston |
| 1/013 | Reciprocating-piston liquid engines with single cylinder, single-acting piston |
| 1/02 | Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders (with movable cylinders F03C 1/22; of flexible-wall type F03C 7/00) |
| 1/03 | Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders (with movable cylinders F03C 1/22; of flexible-wall type F03C 7/00) with movement in two directions being obtained by two single-acting piston liquid engines, each acting in one direction |
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 9,121,237 | Methods of coating wellbore tools and components having such coatings | Jul 28, 11 | Sep 01, 15 | BAKER HUGHES INCORPORATED |
| 9,121,278 | Positive displacement expander and refrigeration cycle apparatus including positive displacement expander | Jan 19, 10 | Sep 01, 15 | MITSUBISHI ELECTRIC CORPORATION |
| 9,115,711 | Method for determining the displacement of a radial piston machine | Nov 29, 10 | Aug 25, 15 | ZF FRIEDRICHSHAFEN AG |
| 9,115,715 | Compressor with pressure reduction groove formed in eccentric part | Sep 24, 12 | Aug 25, 15 | DAIKIN INDUSTRIES, LTD. |
| 9,115,717 | Axial disc and gear pump with axial disc | Nov 30, 11 | Aug 25, 15 | ROBERT BOSCH GMBH |
| 9,109,570 | Tidal adjustment arrangement for a wave energy recovery system | Aug 18, 10 | Aug 18, 15 | AW-ENERGY OY |
| 9,109,586 | Electro-hydraulic drive system for a work machine | Jul 13, 11 | Aug 18, 15 | KAWASAKI JUKOGYO KABUSHIKI KAISHA |
| 9,109,596 | Variable displacement pump | Sep 14, 12 | Aug 18, 15 | HITACHI AUTOMOTIVE SYSTEMS, LTD. |
| 9,109,599 | Scroll compressor having oil hole | Sep 21, 12 | Aug 18, 15 | LG ELECTRONICS INC. |
| 9,112,398 | Nitrogen- and ceramic-surface-treated components for downhole motors and related methods | Jun 25, 13 | Aug 18, 15 | BAKER HUGHES INCORPORATED |
| 9,103,211 | Stator of a gerotor device and a method for manufacturing roller pockets in a stator of a gerotor device | Jan 10, 13 | Aug 11, 15 | WHITE DRIVE PRODUCTS, INC. |
| 9,103,333 | Axial piston machines | Oct 25, 11 | Aug 11, 15 | DUKE ENGINES LIMITED |
| 9,103,341 | Scroll refrigeration compressor with improved retaining means and bypass valves | Nov 29, 11 | Aug 11, 15 | DANFOSS COMMERCIAL COMPRESSORS |
Recent Publications
Not AvailableTop Owners in This Class
Top Owners in This Subclass
Applications Filed in This Class - By Year
Applications Filed in This Subclass - By Year
Patents Issued To Date - By Filing Year
Average Time to Issuance
- 37 Months (last 2 years Issuances)
- 37 Months (last 5 years Issuances)
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