F01K 27/005
Plants for converting heat or fluid energy into mechanical energy, not otherwise
Official title: {by means of hydraulic motors}
F01K27/005 (Plants for converting heat or fluid energy into mechanical energy, not otherwise) appears on 92 US grants and 104 published applications in this corpus.
Search patents in F01K- Granted patents
- 92
- Published applications
- 104
- Assignees
- 44
- Inventors
- 160
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 1 |
| 2003 | 3 | 1 |
| 2004 | 1 | 4 |
| 2005 | 2 | 5 |
| 2006 | 2 | 2 |
| 2007 | 1 | 3 |
| 2008 | 2 | 3 |
| 2009 | 3 | 4 |
| 2010 | 0 | 9 |
| 2011 | 3 | 9 |
| 2012 | 1 | 6 |
| 2013 | 3 | 2 |
| 2014 | 6 | 6 |
| 2015 | 2 | 5 |
| 2016 | 3 | 6 |
| 2017 | 5 | 5 |
| 2018 | 9 | 5 |
| 2019 | 1 | 2 |
| 2020 | 4 | 2 |
| 2021 | 3 | 7 |
| 2022 | 2 | 5 |
| 2023 | 5 | 4 |
| 2024 | 4 | 3 |
| 2025 | 1 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Thermal energy system and method5 May 2026US 12,618,344 B2
- Apparatus for energy conversion31 Mar 2026US 12,590,550 B2G-En Pte Ltd
- Heat engine22 Apr 2025US 12,281,601 B2Technion Research & Development Foundation Limited
- Apparatus and method of utilizing thermal energy using multi fluid direct contact hydraulic cycles18 Jun 2024US 12,012,873 B2
- Heat engine12 Mar 2024US 11,927,117 B2Technion Research & Development Foundation Limited
- High temperature geothermal well tractor20 Aug 2026US 2026/0243139 A1Halliburton Energy Services.Inc.
- Heat engine3 Jul 2025US 2025/0215813 A1Technion Research & Development Foundation Limited
- Apparatus for energy conversion12 Jun 2025US 2025/0188854 A1G-En Pte Ltd
- Thermal energy system and method27 Mar 2025US 2025/0101889 A1
- System and method for power generation5 Dec 2024US 2024/0405638 A1
Most cited
By later US patents
- Power generating system employing geothermally heated fluid63US 4,063,417 ACarrier Corporation · 1977
- Building, or other self-supporting structure, incorporating multi-stage system for energy generation48US 6,434,942 B12002
- Liquid piston internal combustion power system47US 7,191,738 B2LiquidPiston, Inc. · 2007
- Control system for electric power plant46US 4,788,647 ADigitek, Inc. · 1988
- Hybrid RO/PRO system40US 7,871,522 B2Energy Recovery, Inc. · 2011