F04B 53/02
Packing the free space between cylinders and pistons
F04B53/02 (Packing the free space between cylinders and pistons) appears on 176 US grants and 233 published applications in this corpus.
Search patents in F04B- Granted patents
- 176
- Published applications
- 233
- Assignees
- 131
- Inventors
- 442
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 3 |
| 2009 | 1 | 3 |
| 2010 | 1 | 5 |
| 2011 | 1 | 1 |
| 2012 | 1 | 5 |
| 2013 | 4 | 7 |
| 2014 | 4 | 11 |
| 2015 | 5 | 7 |
| 2016 | 5 | 12 |
| 2017 | 16 | 20 |
| 2018 | 5 | 14 |
| 2019 | 12 | 11 |
| 2020 | 10 | 18 |
| 2021 | 10 | 17 |
| 2022 | 13 | 18 |
| 2023 | 14 | 18 |
| 2024 | 17 | 26 |
| 2025 | 21 | 17 |
| 2026 | 20 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Adjustable high pressure packing assembly8 Oct 2026US 2026/0309229 A1Third Coast Innovation LLC
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- Systems and methods of sealing fluids at eccentric temperatures in static and dynamic environments10 Sep 2026US 2026/0266282 A1Shape Technologies Group, Inc.
- Header Ring10 Sep 2026US 2026/0266283 A1Utex Industries, Inc.
- Compressor unit6 Aug 2026US 2026/0226891 A1Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
Most cited
By later US patents
- Disposable ambulatory microprocessor controlled volumetric pump249US 5,807,075 ASarcos Corp. · 1998
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- Volumetric pump and value65US 5,556,263 ASarcos Group · 1996
- Volumetric pump/valve61US 5,603,354 ASarcos Group · 1997