F16L 21/02
Joints with sleeve or socket: with elastic sealing rings between pipe and
Official title: with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings (F16L21/06, F16L21/08 take precedence; if adjustability is essential F16L27/00)
F16L21/02 (Joints with sleeve or socket: with elastic sealing rings between pipe and) appears on 1,032 US grants and 1,013 published applications in this corpus.
Search patents in F16L- Granted patents
- 1,032
- Published applications
- 1,013
- Assignees
- 626
- Inventors
- 1,658
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 8 | 0 |
| 1978 | 20 | 0 |
| 1979 | 6 | 0 |
| 1980 | 10 | 0 |
| 1981 | 10 | 0 |
| 1982 | 4 | 0 |
| 1983 | 7 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 6 | 0 |
| 1987 | 8 | 0 |
| 1988 | 9 | 0 |
| 1989 | 6 | 0 |
| 1990 | 10 | 0 |
| 1991 | 9 | 0 |
| 1992 | 10 | 0 |
| 1993 | 11 | 0 |
| 1994 | 10 | 0 |
| 1995 | 8 | 0 |
| 1996 | 12 | 0 |
| 1997 | 10 | 0 |
| 1998 | 10 | 0 |
| 1999 | 11 | 0 |
| 2000 | 18 | 0 |
| 2001 | 24 | 12 |
| 2002 | 17 | 12 |
| 2003 | 15 | 11 |
| 2004 | 6 | 28 |
| 2005 | 14 | 32 |
| 2006 | 15 | 19 |
| 2007 | 11 | 12 |
| 2008 | 15 | 35 |
| 2009 | 8 | 28 |
| 2010 | 21 | 30 |
| 2011 | 9 | 28 |
| 2012 | 11 | 20 |
| 2013 | 13 | 50 |
| 2014 | 25 | 44 |
| 2015 | 31 | 76 |
| 2016 | 38 | 60 |
| 2017 | 53 | 75 |
| 2018 | 64 | 69 |
| 2019 | 55 | 65 |
| 2020 | 63 | 75 |
| 2021 | 58 | 54 |
| 2022 | 69 | 35 |
| 2023 | 52 | 46 |
| 2024 | 43 | 39 |
| 2025 | 46 | 41 |
| 2026 | 19 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F16L 21/03Placed in the socket before connection373
- F16L 21/04In which sealing rings are compressed by axially-movable members237
- F16L 21/035Placed around the spigot end before connection181
- F16L 21/022Used with sleeves or nipples for pipes of the same diameter, or159
- F16L 21/025Rolling sealing rings19
- F16L 21/05Comprising a first ring being placed on a male part and a12
Recent patents
- Snap-fit sealing gasket with rigid reinforcing ring and use of the same in forming a joing in a fluid conveying plastic pipeline29 Sep 2026US 12,747,811 B1S & B Technical Products, Inc.
- Assembly of resin pipe and metal member and method of manufacturing assembly15 Sep 2026US 12,736,158 B2The Yokohama Rubber Co., Ltd.
- Seal arrangement in the cooling circuit of an E-axle module25 Aug 2026US 12,716,496 B2Robert Bosch GmbH
- Testable termination fitting4 Aug 2026US 12,698,860 B2Franklin Fueling Systems, Inc.
- Constant velocity joint21 Jul 2026US 12,687,202 B2Neapco Intellectual Property Holdings, LLC
- Pressure element1 Oct 2026US 2026/0298378 A1Georg Fischer WAGA N.V.
- Chamfer ring for pipe coupling24 Sep 2026US 2026/0287095 A1
- Pre-assembled coupling assembly with cap6 Aug 2026US 2026/0227014 A1ASC Engineered Solutions, LLC
- Fluid connection assembly with retainer including overmolded seal6 Aug 2026US 2026/0227016 A1Oetiker NY, Inc.
- Plug connector16 Jul 2026US 2026/0201986 A1Carl Freudenberg KG
Most cited
By later US patents
- Deformable mechanical pipe coupling117US 7,086,131 B2Victaulic Company · 2006
- Mechanical pipe coupling having spacers113US 7,401,819 B2Victaulic Company · 2008
- Apparatus for connecting ducts with a self-sealing joint102US 3,955,834 AAktiebolaget Svenska Flaktfabriken · 1976
- Locking joint for pipe systems91US 5,297,826 APont-A-Mousson S. A. · 1994
- Cooperating combination of a gland and a grip ring installed in restrained sealed bolted joints of fluid piping systems including both plastic pipe and metallic pipe91US 5,335,946 ARomac Industries, Inc. · 1994