F04B 53/008
Spacing or clearance between cylinder and piston
Official title: {Spacing or clearance between cylinder and piston}
F04B53/008 (Spacing or clearance between cylinder and piston) appears on 84 US grants and 77 published applications in this corpus.
Search patents in F04B- Granted patents
- 84
- Published applications
- 77
- Assignees
- 74
- Inventors
- 200
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 2 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 2 | 0 |
| 2010 | 0 | 7 |
| 2011 | 4 | 1 |
| 2012 | 1 | 1 |
| 2013 | 0 | 4 |
| 2014 | 3 | 4 |
| 2015 | 0 | 6 |
| 2016 | 4 | 5 |
| 2017 | 2 | 6 |
| 2018 | 8 | 11 |
| 2019 | 9 | 4 |
| 2020 | 7 | 0 |
| 2021 | 3 | 5 |
| 2022 | 3 | 7 |
| 2023 | 2 | 1 |
| 2024 | 4 | 4 |
| 2025 | 2 | 2 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fluid retention apparatus for fluid end of positive displacement pump and related method25 Aug 2026US 12,716,412 B2
- Modular plunger packing gland assembly7 Jul 2026US 12,674,452 B2Caterpillar Inc. Joint OC
- Balanced pressure seal for high pressure pumps2 Jun 2026US 12,644,451 B2Wanner Engineering, Inc.
- Plunger pump and liquid blow molding device10 Mar 2026US 12,571,390 B2Yoshino Kogyosho Co., Ltd.
- Asymmetric gas bearing bushing for thermo-pump21 Oct 2025US 12,448,963 B2KLA Corporation
- Piston intended for a fluid machine and provided with a system for pressing seals, fluid machine comprising such a piston2 Apr 2026US 2026/0092603 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Balanced pressure seal for high pressure pumps10 Apr 2025US 2025/0116270 A1Wanner Engineering, Inc.
- Fluid Retention Apparatus for Fluid End of Positive Displacement Pump and Related Method23 Jan 2025US 2025/0027492 A1
- Asymmetric gas bearing bushing for thermo-pump10 Oct 2024US 2024/0337259 A1KLA Corporation
- System for dispensing abrasive material18 Jul 2024US 2024/0240625 A1Graco Minnesota Inc.
Most cited
By later US patents
- Fluid bearing with compliant linkage for centering reciprocating bodies84US 5,525,845 ASunPower Corporation · 1996
- Low power electromagnetic pump46US 4,569,641 AGreatbatch Enterprises, Inc. · 1986
- Reciprocating high-pressure compressor piston with annular clearance43US 5,033,940 ASulzer Brothers Limited · 1991
- Low power electromagnetic pump41US 4,636,150 AGreatbatch Enterprises, Inc. · 1987
- Reciprocating diaphragm pump with packless piston-cylinder unit35US 6,299,419 B1Lang Apparatebau GmbH (Lang) · 2001