F02F 3/0023
The parts being bolted or screwed together
Official title: {the parts being bolted or screwed together}
F02F3/0023 (The parts being bolted or screwed together) appears on 105 US grants and 66 published applications in this corpus.
Search patents in F02F- Granted patents
- 105
- Published applications
- 66
- Assignees
- 54
- Inventors
- 139
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 2 |
| 2003 | 1 | 3 |
| 2004 | 3 | 1 |
| 2005 | 2 | 3 |
| 2006 | 0 | 4 |
| 2007 | 5 | 3 |
| 2008 | 3 | 9 |
| 2009 | 4 | 6 |
| 2010 | 2 | 1 |
| 2011 | 5 | 7 |
| 2012 | 4 | 0 |
| 2013 | 0 | 4 |
| 2014 | 4 | 1 |
| 2015 | 1 | 4 |
| 2016 | 2 | 0 |
| 2017 | 2 | 1 |
| 2018 | 0 | 5 |
| 2019 | 3 | 2 |
| 2020 | 2 | 2 |
| 2021 | 2 | 0 |
| 2022 | 2 | 3 |
| 2023 | 0 | 1 |
| 2024 | 2 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Port assembly for 2-stroke diesel engine9 Jun 2026US 12,650,106 B2DeltaHawk Engines, Inc.
- Piston assembly with opposing injection regions for an opposed-piston engine3 Jun 2025US 12,320,312 B2Achates Power, Inc.
- Stirling cycle machine1 Oct 2024US 12,104,552 B2DEKA Products Limited Partnership
- Cylinder unit for eliminating secondary forces in inline internal combustion engines30 Jan 2024US 11,885,378 B2
- Piston having outer thread8 Nov 2022US 11,492,996 B2KS Kolbenschmidt GmbH
- Piston Assembly22 Jan 2026US 2026/0022677 A1DeltaHawk Engines, Inc.
- Port Assembly for 2-Stroke Diesel Engine17 Apr 2025US 2025/0122852 A1DeltaHawk Engines, Inc.
- Stirling cycle machine23 Jan 2025US 2025/0027461 A1DEKA Products Limited Partnership
- Method of designing and producing fiber-reinforced polymer pistons29 Feb 2024US 2024/0066644 A1AWA Forged Composites, LLC
- Piston assembly with opposing injection regions for an opposed-piston engine7 Dec 2023US 2023/0392564 A1Achates Power, Inc.
Most cited
By later US patents
- Pistons for an internal combustion engine40US 5,081,968 ABorgo-Nova SpA · 1992
- Piston having a barrel of forged steel and a cooling channel39US 6,026,777 AMahle GmbH · 2000
- Insulated composite piston35US 4,242,948 ACummins Engine Company, Inc. · 1981
- Engine parts and method of producing the same34US 4,667,627 ANGK Insulators, Ltd. · 1987
- Liquid-cooled composite piston for internal combustion engines28US 4,587,932 AKolbenschmidt Aktiengesellschaft · 1986