F16J 15/26
With stuffing-boxes for rigid sealing rings
Official title: with stuffing-boxes for rigid sealing rings
F16J15/26 (With stuffing-boxes for rigid sealing rings) appears on 260 US grants and 229 published applications in this corpus.
Search patents in F16J- Granted patents
- 260
- Published applications
- 229
- Assignees
- 149
- Inventors
- 444
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 9 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 5 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 6 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 0 |
| 2002 | 9 | 1 |
| 2003 | 0 | 3 |
| 2004 | 1 | 3 |
| 2005 | 5 | 3 |
| 2006 | 1 | 1 |
| 2007 | 1 | 6 |
| 2008 | 1 | 5 |
| 2009 | 1 | 6 |
| 2010 | 5 | 4 |
| 2011 | 1 | 3 |
| 2012 | 5 | 4 |
| 2013 | 0 | 8 |
| 2014 | 4 | 9 |
| 2015 | 2 | 5 |
| 2016 | 9 | 10 |
| 2017 | 5 | 4 |
| 2018 | 6 | 12 |
| 2019 | 8 | 12 |
| 2020 | 12 | 25 |
| 2021 | 18 | 25 |
| 2022 | 21 | 16 |
| 2023 | 17 | 17 |
| 2024 | 21 | 22 |
| 2025 | 20 | 16 |
| 2026 | 10 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fluid end with clamped retention25 Aug 2026US 12,716,495 B2Kerr Machine Co.
- Fluid end assembly18 Aug 2026US 12,710,039 B2Kerr Machine Co.
- Piston for a compressor, compressor, and method and removal tool for disassembling a piston2 Jun 2026US 12,644,447 B2Burckhardt Compression AG
- Packaging ring with wear opening21 Apr 2026US 12,607,262 B2Hoerbiger Wien GmbH
- Packaging ring with diagonal relief opening21 Apr 2026US 12,607,263 B2Hoerbiger Wien GmbH
- Packing ring, sealing device, compressor, rotational system and method for detecting the condition of wear9 Jul 2026US 2026/0194143 A1Stasskol GmbH
- Circumferential Sealing Assembly with Duct-Fed Hydrodynamic Grooves9 Jul 2026US 2026/0194144 A1Stein Seal Company
- High performance sealing assembly18 Jun 2026US 2026/0168490 A1Vulcan Industrial Holdings, LLC
- Carbon Radial Seal4 Jun 2026US 2026/0153056 A1Rtx Corporation
- Packing seal assembly21 May 2026US 2026/0139663 A1Kerr Machine Co.
Most cited
By later US patents
- Well sealing system132US 4,288,082 AOtis Engineering Corporation · 1981
- Packing for piston and valve machine71US 5,145,340 ADowell Schlumberger Incorporated · 1992
- Flexible non-planar graphite sealing ring65US 5,201,532 AMark Controls Corporation · 1993
- Shaft seal assembly and seal ring therefor61US 4,116,451 AMaurer Engineering Inc. · 1978
- Seal utilizing composites of flexible graphite particles and amorphous carbon60US 4,826,181 AUnion Carbide Corporation · 1989