F16K 41/02
Spindle sealings: with stuffing-box
Official title: with stuffing-box {; Sealing rings}
F16K41/02 (Spindle sealings: with stuffing-box) appears on 505 US grants and 401 published applications in this corpus.
Search patents in F16K- Granted patents
- 505
- Published applications
- 401
- Assignees
- 325
- Inventors
- 1,004
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 7 | 0 |
| 1982 | 11 | 0 |
| 1983 | 7 | 0 |
| 1984 | 10 | 0 |
| 1985 | 14 | 0 |
| 1986 | 9 | 0 |
| 1987 | 7 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 10 | 0 |
| 1993 | 14 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 9 | 0 |
| 1999 | 8 | 0 |
| 2000 | 10 | 0 |
| 2001 | 12 | 3 |
| 2002 | 5 | 3 |
| 2003 | 6 | 8 |
| 2004 | 1 | 9 |
| 2005 | 8 | 10 |
| 2006 | 8 | 9 |
| 2007 | 5 | 11 |
| 2008 | 2 | 9 |
| 2009 | 5 | 5 |
| 2010 | 6 | 6 |
| 2011 | 5 | 16 |
| 2012 | 7 | 9 |
| 2013 | 10 | 15 |
| 2014 | 14 | 12 |
| 2015 | 9 | 19 |
| 2016 | 20 | 16 |
| 2017 | 9 | 12 |
| 2018 | 16 | 22 |
| 2019 | 20 | 29 |
| 2020 | 15 | 24 |
| 2021 | 25 | 30 |
| 2022 | 29 | 18 |
| 2023 | 28 | 26 |
| 2024 | 20 | 34 |
| 2025 | 30 | 25 |
| 2026 | 18 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F16K 41/04With at least one ring of rubber or like material between spindle249
- F16K 41/023For spindles which only rotate, i.e. non-rising spindles93
- F16K 41/08With at least one ring provided with axially-protruding peripheral closing-lip37
- F16K 41/06With at least one ring attached to both spindle and housing20
Recent patents
- High-pressure fluid on/off valve and components and method of use of same29 Sep 2026US 12,747,803 B2Flow International Corporation
- Connector structure of stepless capacity control actuator of reciprocating compressor22 Sep 2026US 12,742,451 B2Beijing University of Chemical Technology
- Packing system of a valve assembly25 Aug 2026US 12,716,521 B2Fisher Controls International LLC
- Vibration reducing device25 Aug 2026US 12,716,522 B2FMC Technologies, Inc.
- Multi-functional valve travel stop18 Aug 2026US 12,710,099 B2Bray International, Inc.
- Improvements in, or relating to valves and methods therefor24 Sep 2026US 2026/0287081 A1
- Compact valve for cryogen media with conditioning system30 Jul 2026US 2026/0218798 A1Linde Aktiengesellschaft
- A valve with a spring30 Jul 2026US 2026/0218811 A1Valmet Flow Control Oy
- Cryogenic fluid shut-off valve9 Jul 2026US 2026/0194145 A1Engineered Controls International, LLC
- Three-way valve for flow rate control, and temperature control device2 Jul 2026US 2026/0185619 A1Shinwa Controls Co., Ltd
Most cited
By later US patents
- Cooling control system and expansion valve therefor118US 4,506,518 APacific Industrial Co., Ltd. · 1985
- Safety shut-off valve98US 3,958,592 AWillis Oil Tool Co. · 1976
- Valve stem packing system85US 5,263,682 AWhitey Co. · 1993
- High pressure gate valve with preloaded, stacked, solid lubricated stem seals80US 4,340,204 ASmith International, Inc. · 1982
- Valve stem packing structure79US 5,056,758 A1991