F01D 1/34
Non-positive-displacement machines or engines: characterised by non-bladed rotor
Official title: characterised by non-bladed rotor, e.g. with drilled holes (F01D1/32 takes precedence; sirens G10K7/00 {; impact turbines with buckets F01D1/026; hand-held tools with a non-bladed rotor F01D15/067})
F01D1/34 (Non-positive-displacement machines or engines: characterised by non-bladed rotor) appears on 195 US grants and 170 published applications in this corpus.
Search patents in F01D- Granted patents
- 195
- Published applications
- 170
- Assignees
- 87
- Inventors
- 296
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 5 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 8 | 0 |
| 1981 | 7 | 0 |
| 1982 | 1 | 0 |
| 1983 | 8 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 12 | 2 |
| 2002 | 10 | 11 |
| 2003 | 7 | 4 |
| 2004 | 6 | 6 |
| 2005 | 6 | 11 |
| 2006 | 2 | 6 |
| 2007 | 3 | 9 |
| 2008 | 4 | 2 |
| 2009 | 2 | 6 |
| 2010 | 5 | 4 |
| 2011 | 2 | 7 |
| 2012 | 1 | 3 |
| 2013 | 1 | 10 |
| 2014 | 5 | 13 |
| 2015 | 4 | 9 |
| 2016 | 7 | 9 |
| 2017 | 4 | 2 |
| 2018 | 4 | 11 |
| 2019 | 5 | 6 |
| 2020 | 6 | 7 |
| 2021 | 7 | 11 |
| 2022 | 9 | 4 |
| 2023 | 6 | 5 |
| 2024 | 3 | 4 |
| 2025 | 5 | 6 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Double-suction split case multi-disc pump3 Feb 2026US 12,540,622 B1
- Supercharged combustor cooling using turbomachinery13 Jan 2026US 12,523,173 B2Rtx Corporation
- Boundary-layer turbomachine2 Dec 2025US 12,486,772 B2
- Pulsating pneumatic motor26 Aug 2025US 12,398,643 B2
- Engine1 Jul 2025US 12,345,202 B2Tree Associates Ltd.
- Turbine engine system7 May 2026US 2026/0125981 A1Heleng Inc.
- System and method for generating power5 Mar 2026US 2026/0063038 A1Boundary Energy Inc.
- Supercharged combustor cooling using turbomachinery13 Nov 2025US 2025/0347249 A1Rtx Corporation
- Turbomachine and apparatus comprising said turbomachine26 Jun 2025US 2025/0207605 A1Sf Energy Srl
- Ultra-efficient bladeless turbomachinery5 Jun 2025US 2025/0179919 A1
Most cited
By later US patents
- Viscous drag impeller components incorporated into pumps, turbines and transmissions164US 6,375,412 B12002
- Natural gas turbine generator128US 7,683,499 B2S & W Holding, Inc. · 2010
- Prandtl layer turbine92US 6,328,527 B1Fantom Technologies Inc. · 2001
- Turbines and methods of generating power58US 7,341,424 B2Dial Discoveries, LLC · 2008
- Prandtl layer turbine57US 6,183,641 B2Fantom Technologies Inc. · 2001