Description
Class F03C : POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
Subclass 1/00: Reciprocating-piston liquid engines
F03C 1/00
Sub-Class
Stats
- 113 US PATENTS IN FORCE
- 9 US APPLICATIONS PENDING
- 43 Total Patent Owners
- 287 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12264678 | Fuel pump driven by a variable displacement motor for aerial refueling operation | Dec 08, 23 | Apr 01, 25 | FEDERAL INDUSTRIES, INC. |
| 12000369 | Thermal energy storage system including a plurality of vessels each having hot and cold liquid portions separated by a floating piston | Nov 04, 22 | Jun 04, 24 | NORWICH TECHNOLOGIES, INC. |
| 11867185 | Fuel pump driven by a variable displacement motor for aerial refueling operation | Apr 30, 21 | Jan 09, 24 | FEDERAL INDUSTRIES, INC. |
| 11592000 | Servoless motor | Jul 31, 18 | Feb 28, 23 | Danfoss Power Solutions Inc. |
| 11578693 | Thermal energy storage system including a vessel having hot and cold liquid portions separated by floating piston | Dec 14, 21 | Feb 14, 23 | NORWICH TECHNOLOGIES, INC. |
| 11519504 | Piston ring for floating piston in a thermal energy storage system | Dec 14, 21 | Dec 06, 22 | NORWICH TECHNOLOGIES, INC. |
| 11073147 | Measuring hydraulic fluid pressure in a fluid-working machine | Sep 21, 18 | Jul 27, 21 | Artemis Intelligent Power Limited |
| 11067144 | Braking system for a hydraulic machine | Jul 12, 17 | Jul 20, 21 | Poclain Hydraulics Industrie |
| 10953442 | Hydraulic culvert cleaner | Aug 27, 18 | Mar 23, 21 | Diversified Products, LLC |
| 10931169 | Buoyant synchrony actuated inductance AC generator/BSAI AC generator | Nov 18, 16 | Feb 23, 21 | Not available |
| 10865765 | Device for supplying and modifying a cylinder cubic capacity of a hydraulic motor | Aug 01, 18 | Dec 15, 20 | Manitou Italia S.R.L. |
| 10746203 | Side inflow and side outflow hydraulic pump | Apr 16, 18 | Aug 18, 20 | Not available |
| 10694687 | Electric tree felling head and associated control system for a forestry vehicle | Aug 11, 17 | Jun 30, 20 | Deere & Company |
| 10578084 | Hydraulic device with radial pistons comprising at least one ball bearing | Dec 17, 15 | Mar 03, 20 | Poclain Hydraulics Industrie |
| 10527022 | Hydraulic apparatus having an additional thrust section | Apr 01, 15 | Jan 07, 20 | Poclain Hydraulics Industrie |
| 10524026 | Hydrostatic system | Sep 12, 17 | Dec 31, 19 | Danfoss Power Solutions G.m.b.H. & Co. OHG |
| 10487477 | Apparatus and method for controlling construction machine | Jul 01, 16 | Nov 26, 19 | Doosan Infracore Co. Ltd. |
| 10458401 | Housing for a motor or compressor | Aug 01, 17 | Oct 29, 19 | Knorr-Bremse Systeme fuer Nutzfahrzeuge GmbH |
| 10352291 | Power take off system for wave energy convertor | Sep 16, 16 | Jul 16, 19 | Not available |
| 10247168 | Rotational mechanical transformer apparatus and methods | Apr 27, 17 | Apr 02, 19 | Not available |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0035,170 | ACTUATION SYSTEM FOR A MOTOR | Jul 24, 23 | Jan 30, 25 | Not available |
| 2024/0280,074 | Thermal Energy Storage System Including a Plurality of Vessels Each Having Hot and Cold Liquid Portions Separated by a Floating Piston | May 02, 24 | Aug 22, 24 | Not available |
| 2024/0280,101 | Reversible Reciprocating Pump | Apr 29, 24 | Aug 22, 24 | Quidnet Energy Inc. |
| 2024/0191,685 | ENERGY CONVERSION SYSTEM BASED ON PHASE CHANGE AND GRAVITATIONAL PRESSURE WAVE GENERATION AND CONVERSION | Apr 13, 21 | Jun 13, 24 | Not available |
| 2024/0093,666 | HYDROSTATIC RADIAL PISTON UNIT | Dec 29, 20 | Mar 21, 24 | Not available |
| 2022/0356,878 | Reversible Reciprocating Pump | Jun 26, 20 | Nov 10, 22 | Quidnet Energy Inc. |
| 2020/0309,088 | BRAKE SYSTEM AND FLUID PRESSURE MOTOR INCLUDING THE SAME | Jun 03, 19 | Oct 01, 20 | KYB Corporation |
| 2019/0093,625 | DEVICE FOR SUPPLYING AND MODIFYING A CYLINDER CUBIC CAPACITY OF A HYDRAULIC MOTOR | Aug 01, 18 | Mar 28, 19 | Not available |
| 2018/0094,617 | Device and Method to Convert Reciprocating Linear Motion into Linear Fluid Flow | Oct 04, 17 | Apr 05, 18 | Not available |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 33 Months (last 2 years Issuances)
- 33 Months (last 5 years Issuances)