F16J 15/18
With stuffing-boxes for elastic or plastic packings
Official title: with stuffing-boxes for elastic or plastic packings
F16J15/18 (With stuffing-boxes for elastic or plastic packings) appears on 820 US grants and 666 published applications in this corpus.
Search patents in F16J- Granted patents
- 820
- Published applications
- 666
- Assignees
- 470
- Inventors
- 1,455
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 10 | 0 |
| 1978 | 11 | 0 |
| 1979 | 13 | 0 |
| 1980 | 13 | 0 |
| 1981 | 18 | 0 |
| 1982 | 12 | 0 |
| 1983 | 12 | 0 |
| 1984 | 14 | 0 |
| 1985 | 10 | 0 |
| 1986 | 13 | 0 |
| 1987 | 11 | 0 |
| 1988 | 10 | 0 |
| 1989 | 17 | 0 |
| 1990 | 12 | 0 |
| 1991 | 15 | 0 |
| 1992 | 12 | 0 |
| 1993 | 16 | 0 |
| 1994 | 19 | 0 |
| 1995 | 9 | 0 |
| 1996 | 17 | 0 |
| 1997 | 15 | 0 |
| 1998 | 17 | 0 |
| 1999 | 4 | 0 |
| 2000 | 7 | 0 |
| 2001 | 14 | 7 |
| 2002 | 12 | 5 |
| 2003 | 14 | 19 |
| 2004 | 6 | 9 |
| 2005 | 3 | 20 |
| 2006 | 10 | 10 |
| 2007 | 4 | 15 |
| 2008 | 7 | 13 |
| 2009 | 5 | 14 |
| 2010 | 10 | 20 |
| 2011 | 2 | 12 |
| 2012 | 11 | 15 |
| 2013 | 9 | 23 |
| 2014 | 15 | 23 |
| 2015 | 18 | 44 |
| 2016 | 36 | 19 |
| 2017 | 22 | 29 |
| 2018 | 18 | 47 |
| 2019 | 38 | 38 |
| 2020 | 29 | 44 |
| 2021 | 36 | 36 |
| 2022 | 29 | 48 |
| 2023 | 40 | 40 |
| 2024 | 47 | 53 |
| 2025 | 49 | 35 |
| 2026 | 18 | 28 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F16J 15/20Packing materials therefor276
- F16J 15/184Tightening mechanisms208
- F16J 15/182With lubricating, cooling or draining means136
- F16J 15/24With radially or tangentially compressed packing80
- F16J 15/187Self-aligning stuffing-boxes47
- F16J 15/188Split assemblies46
- F16J 15/181For plastic packings41
- F16J 15/189Means for facilitating the removal of the packing23
Recent patents
- Sealing system for a rotary shaft with radially directed sealing forces15 Sep 2026US 12,736,135 B2Tamar (R.C.) Technologies Development Ltd.
- Sealing device and back-up ring25 Aug 2026US 12,716,494 B2Nok Corporation
- Fluid end with clamped retention25 Aug 2026US 12,716,495 B2Kerr Machine Co.
- Packing system of a valve assembly25 Aug 2026US 12,716,521 B2Fisher Controls International LLC
- Fluid end assembly18 Aug 2026US 12,710,039 B2Kerr Machine Co.
- Adjustable high pressure packing assembly8 Oct 2026US 2026/0309229 A1Third Coast Innovation LLC
- Adjustable seal system for a reciprocating pump1 Oct 2026US 2026/0298225 A1Gd Energy Products, LLC
- Shaft Seal Assembly3 Sep 2026US 2026/0258869 A1Inpro/Seal LLC
- Scroll fluid machine with elastic member27 Aug 2026US 2026/0251140 A1Anest Iwata Corporation
- Piston sealing ring assembly having a gap cover element13 Aug 2026US 2026/0235203 A1Mainspring Energy, Inc.
Most cited
By later US patents
- Packing cartridges and pressure-dampening elements for plunger-type pumps108US 8,100,407 B22012
- Rotary shaft seal82US 4,484,753 ANL Industries, Inc. · 1984
- Seal81US 4,451,047 ASmith International, Inc. · 1984
- Valve stem packing structure79US 5,056,758 A1991
- Seal and seal assembly for well tools77US 4,753,444 AOtis Engineering Corporation · 1988