F01B 9/00
Reciprocating-piston machines or engines characterised by connections between pistons and main shafts
Official title: Reciprocating-piston machines or engines characterised by connections between pistons and main shafts, not specific to groups F01B1/00 - F01B7/00
F01B9/00 (Reciprocating-piston machines or engines characterised by connections between pistons and main shafts) appears on 756 US grants and 492 published applications in this corpus.
Search patents in F01B- Granted patents
- 756
- Published applications
- 492
- Assignees
- 265
- Inventors
- 955
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 11 | 0 |
| 1978 | 10 | 0 |
| 1979 | 11 | 0 |
| 1980 | 9 | 0 |
| 1981 | 13 | 0 |
| 1982 | 10 | 0 |
| 1983 | 12 | 0 |
| 1984 | 20 | 0 |
| 1985 | 17 | 0 |
| 1986 | 9 | 0 |
| 1987 | 8 | 0 |
| 1988 | 11 | 0 |
| 1989 | 15 | 0 |
| 1990 | 20 | 0 |
| 1991 | 7 | 0 |
| 1992 | 13 | 0 |
| 1993 | 14 | 0 |
| 1994 | 19 | 0 |
| 1995 | 13 | 0 |
| 1996 | 24 | 0 |
| 1997 | 15 | 0 |
| 1998 | 17 | 0 |
| 1999 | 17 | 0 |
| 2000 | 16 | 0 |
| 2001 | 17 | 6 |
| 2002 | 11 | 13 |
| 2003 | 14 | 10 |
| 2004 | 11 | 21 |
| 2005 | 9 | 11 |
| 2006 | 10 | 15 |
| 2007 | 11 | 21 |
| 2008 | 13 | 13 |
| 2009 | 12 | 27 |
| 2010 | 6 | 23 |
| 2011 | 10 | 26 |
| 2012 | 21 | 29 |
| 2013 | 20 | 30 |
| 2014 | 27 | 25 |
| 2015 | 18 | 25 |
| 2016 | 16 | 26 |
| 2017 | 24 | 19 |
| 2018 | 19 | 17 |
| 2019 | 28 | 31 |
| 2020 | 21 | 28 |
| 2021 | 33 | 27 |
| 2022 | 18 | 22 |
| 2023 | 18 | 10 |
| 2024 | 10 | 4 |
| 2025 | 10 | 10 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Waissi Engine drivetrain bearing ring interface to piston base bearing pad28 Jul 2026US 12,692,813 B2
- Radial cam engine23 Jun 2026US 12,662,941 B2
- Power system with carbon dioxide working fluid, generator, and propulsion system10 Mar 2026US 12,571,310 B2
- Internal combustion engine with improved oil pump arrangement13 Jan 2026US 12,523,166 B2ASF Technologies (Australia) Pty Ltd
- Driving engine for vehicles30 Sep 2025US 12,429,011 B2Ferrari S.P. A.
- Hypocycloidal mechanism6 Aug 2026US 2026/0226966 A1
- Multi-stage system16 Apr 2026US 2026/0103985 A1Kn Gg IP Holding and Licensing, LLC
- Free piston engine12 Feb 2026US 2026/0043344 A1
- Valved-piston and actuator with recycled combustion4 Dec 2025US 2025/0369373 A1
- Electro-fluidic drive system6 Nov 2025US 2025/0341224 A1PHD, Inc.
Most cited
By later US patents
- Opposed piston internal combustion engine with inviscid layer sealing470US 9,909,492 B2Prime Group Alliance, LLC · 2018
- Reciprocating machine178US 5,762,480 A1998
- Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange119US 8,436,489 B2LightSail Energy, Inc. · 2013
- Continuously variable transmission106US 8,480,529 B2Fallbrook Intellectual Property Company LLC · 2013
- Continuously variable transmission70US 9,017,207 B2Fallbrook Intellectual Property Company LLC · 2015