F16L 21/04
In which sealing rings are compressed by axially-movable members
Official title: in which sealing rings are compressed by axially-movable members
F16L21/04 (In which sealing rings are compressed by axially-movable members) appears on 237 US grants and 189 published applications in this corpus.
Search patents in F16L- Granted patents
- 237
- Published applications
- 189
- Assignees
- 139
- Inventors
- 336
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 9 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 4 |
| 2002 | 6 | 2 |
| 2003 | 4 | 5 |
| 2004 | 2 | 5 |
| 2005 | 3 | 9 |
| 2006 | 6 | 4 |
| 2007 | 3 | 2 |
| 2008 | 3 | 4 |
| 2009 | 1 | 4 |
| 2010 | 3 | 1 |
| 2011 | 0 | 6 |
| 2012 | 3 | 3 |
| 2013 | 4 | 9 |
| 2014 | 3 | 5 |
| 2015 | 2 | 13 |
| 2016 | 5 | 12 |
| 2017 | 15 | 13 |
| 2018 | 11 | 12 |
| 2019 | 14 | 12 |
| 2020 | 14 | 21 |
| 2021 | 14 | 12 |
| 2022 | 14 | 6 |
| 2023 | 14 | 9 |
| 2024 | 9 | 6 |
| 2025 | 7 | 7 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Pipe fitting with draw mechanism19 May 2026US 12,631,273 B2Romac Industries, Inc.
- Mechanical joint restraint30 Dec 2025US 12,510,194 B2Mueller International, LLC
- Mechanical joint gasket with protrusions9 Dec 2025US 12,492,749 B2EBAA Iron, Inc.
- Pipe joint, gland, and method for joining pipes14 Oct 2025US 12,442,472 B2Daifuku Co., Ltd.
- Pipe joint, spacer provided in pipe joint, and dividing piece constituting spacer15 Jul 2025US 12,359,755 B2Kubota Corporation
- Pressure element1 Oct 2026US 2026/0298378 A1Georg Fischer WAGA N.V.
- Fluid connection assembly with retainer including overmolded seal6 Aug 2026US 2026/0227016 A1Oetiker NY, Inc.
- Ring body, pipe joint, and method for joining pipes using the ring body16 Jul 2026US 2026/0201987 A1Kubota Corporation
- Pipe connecting structure16 Oct 2025US 2025/0320939 A1Shimadzu Corporation
- Groove-free quick-insert pipe clamp and processing device thereof2 Oct 2025US 2025/0305600 A1Weifang 100Tong Casting Co.,Ltd.
Most cited
By later US patents
- 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
- Pipe junction holder71US 4,092,036 ASuiken Co., Ltd. · 1978
- Connector and coupling means62US 5,941,576 A1999
- Pipe coupling61US 6,481,762 B1Glynwed Pipe Systems Limited · 2002