F04B 53/12
Arranged in or on pistons
Official title: arranged in or on pistons
F04B53/12 (Arranged in or on pistons) appears on 524 US grants and 381 published applications in this corpus.
Search patents in F04B- Granted patents
- 524
- Published applications
- 381
- Assignees
- 281
- Inventors
- 874
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 12 | 0 |
| 1978 | 11 | 0 |
| 1979 | 4 | 0 |
| 1980 | 7 | 0 |
| 1981 | 6 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 10 | 0 |
| 1985 | 5 | 0 |
| 1986 | 9 | 0 |
| 1987 | 7 | 0 |
| 1988 | 6 | 0 |
| 1989 | 6 | 0 |
| 1990 | 6 | 0 |
| 1991 | 7 | 0 |
| 1992 | 4 | 0 |
| 1993 | 9 | 0 |
| 1994 | 8 | 0 |
| 1995 | 12 | 0 |
| 1996 | 15 | 0 |
| 1997 | 17 | 0 |
| 1998 | 9 | 0 |
| 1999 | 14 | 0 |
| 2000 | 12 | 0 |
| 2001 | 12 | 2 |
| 2002 | 14 | 12 |
| 2003 | 11 | 4 |
| 2004 | 8 | 9 |
| 2005 | 2 | 4 |
| 2006 | 5 | 10 |
| 2007 | 4 | 8 |
| 2008 | 3 | 12 |
| 2009 | 4 | 7 |
| 2010 | 2 | 13 |
| 2011 | 4 | 11 |
| 2012 | 6 | 6 |
| 2013 | 12 | 19 |
| 2014 | 6 | 11 |
| 2015 | 9 | 15 |
| 2016 | 13 | 19 |
| 2017 | 10 | 21 |
| 2018 | 14 | 34 |
| 2019 | 26 | 24 |
| 2020 | 33 | 25 |
| 2021 | 25 | 23 |
| 2022 | 20 | 25 |
| 2023 | 17 | 20 |
| 2024 | 17 | 21 |
| 2025 | 21 | 14 |
| 2026 | 13 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Dart and clutch assembly15 Sep 2026US 12,735,962 B2Epic Lift Systems
- Air compressor structure8 Sep 2026US 12,729,671 B2Unik World Industrial Co., Ltd.
- Apparatus and method of pre-preparing a liquid delivery device valve for use8 Sep 2026US 12,729,678 B2Merxin Limited
- Through-hardened valve seat for hydraulic fracturing1 Sep 2026US 12,723,662 B2Apex Industrial LLC
- System and method for valve assembly28 Jul 2026US 12,692,945 B2Vulcan Industrial Holdings, LLC
- Through-Hardened Valve Seat for Hydraulic Fracturing1 Oct 2026US 2026/0298349 A1Apex Industrial LLC
- Oil overflow control for diaphragm compressor3 Sep 2026US 2026/0258800 A1
- Low-pressure pump for hydrogen pumping system25 Jun 2026US 2026/0177052 A1FirstElement Fuel, Inc.
- Plunger with plunger ball retention mechanism for plunger lift applications28 May 2026US 2026/0146516 A1ChampionX LLC
- Electrically operated linear pump and pump drive21 May 2026US 2026/0139662 A1Graco Minnesota Inc.
Most cited
By later US patents
- Linear pump231US 5,924,975 AInternational Business Machines Corporation · 1999
- Disposable plastic liquid pump118US 5,165,577 A1992
- Fluid end for reciprocating pump104US 5,061,159 A1991
- Device for producing high pressure in a fluid in miniature104US 5,964,416 ABoehringer Ingelheim GmbH · 1999
- Disposable plastic liquid pump101US 5,282,552 AHygiene-Technik Inc. · 1994