F16L 21/00
Joints with sleeve or socket
Official title: Joints with sleeve or socket (F16L13/00, {F16L15/00,} F16L17/00, F16L19/00 take precedence; {joints for pipes made of reinforced concrete F16L25/0027;} connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics F16L47/00; specially adapted for pipes of brittle material F16L49/00)
F16L21/00 (Joints with sleeve or socket) appears on 2,301 US grants and 2,193 published applications in this corpus.
Search patents in F16L- Granted patents
- 2,301
- Published applications
- 2,193
- Assignees
- 1,159
- Inventors
- 3,625
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 26 | 0 |
| 1977 | 20 | 0 |
| 1978 | 37 | 0 |
| 1979 | 18 | 0 |
| 1980 | 18 | 0 |
| 1981 | 19 | 0 |
| 1982 | 13 | 0 |
| 1983 | 14 | 0 |
| 1984 | 17 | 0 |
| 1985 | 19 | 0 |
| 1986 | 22 | 0 |
| 1987 | 30 | 0 |
| 1988 | 16 | 0 |
| 1989 | 19 | 0 |
| 1990 | 18 | 0 |
| 1991 | 23 | 0 |
| 1992 | 24 | 0 |
| 1993 | 27 | 0 |
| 1994 | 23 | 0 |
| 1995 | 20 | 0 |
| 1996 | 23 | 0 |
| 1997 | 21 | 0 |
| 1998 | 31 | 0 |
| 1999 | 28 | 0 |
| 2000 | 38 | 0 |
| 2001 | 42 | 15 |
| 2002 | 28 | 25 |
| 2003 | 32 | 34 |
| 2004 | 24 | 57 |
| 2005 | 29 | 63 |
| 2006 | 32 | 50 |
| 2007 | 26 | 35 |
| 2008 | 29 | 81 |
| 2009 | 31 | 57 |
| 2010 | 45 | 65 |
| 2011 | 29 | 60 |
| 2012 | 26 | 49 |
| 2013 | 36 | 89 |
| 2014 | 45 | 103 |
| 2015 | 65 | 177 |
| 2016 | 90 | 137 |
| 2017 | 105 | 141 |
| 2018 | 138 | 141 |
| 2019 | 121 | 128 |
| 2020 | 141 | 140 |
| 2021 | 122 | 109 |
| 2022 | 123 | 97 |
| 2023 | 106 | 103 |
| 2024 | 112 | 94 |
| 2025 | 96 | 87 |
| 2026 | 64 | 56 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F16L 21/02Joints with sleeve or socket: with elastic sealing rings between pipe and1,032
- F16L 21/08Joints with sleeve or socket: with additional locking means719
- F16L 21/06Joints with sleeve or socket: with a divided sleeve or ring clamping644
- F16L 21/002Sleeves or nipples for pipes of the same diameter434
- F16L 21/007Clamped by a wedging action108
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.
- Quick-fitting pipe fitting29 Sep 2026US D1,149,644 S1Shanghai Vision Mechanical Joint Co., Ltd. · Design
- Retaining device for end rings of pipe coupling22 Sep 2026US 12,742,510 B1Krausz Industries Ltd.
- Sealing member for repairing a pipeline and method of use15 Sep 2026US 12,736,157 B2Oceaneering International, Inc.
- Assembly of resin pipe and metal member and method of manufacturing assembly15 Sep 2026US 12,736,158 B2The Yokohama Rubber Co., Ltd.
- Fluid-circulation housing and method for assembling such a housing8 Oct 2026US 2026/0309257 A1Vernet
- Pressure element1 Oct 2026US 2026/0298378 A1Georg Fischer WAGA N.V.
- Chamfer ring for pipe coupling24 Sep 2026US 2026/0287095 A1
- Fluid adaptor24 Sep 2026US 2026/0287096 A1Ckd Solutions, LLC
- Compression fittings and systems, kits, and methods incorporating the same24 Sep 2026US 2026/0287097 A1Titeflex Corporation
Most cited
By later US patents
- Pipe connection unit134US 5,098,134 A1992
- Pipe coupling130US 4,417,755 AFamilian Corp. · 1983
- Tubing interconnection system with different size snap ring grooves125US 5,845,945 A1998
- Pipeline system and method of assembly124US 4,601,495 AVictaulic Company of America · 1986
- Anti-mismatch or near-sized coupling segments123US 6,626,466 B1Victaulic Company of America · 2003