E03D 3/04
With piston valve and pressure chamber for retarding the valve-closing movement
Official title: with piston valve and pressure chamber for retarding the valve-closing movement
E03D3/04 (With piston valve and pressure chamber for retarding the valve-closing movement) appears on 70 US grants and 57 published applications in this corpus.
Search patents in E03D- Granted patents
- 70
- Published applications
- 57
- Assignees
- 34
- Inventors
- 111
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 0 |
| 2003 | 0 | 2 |
| 2004 | 2 | 5 |
| 2005 | 5 | 7 |
| 2006 | 2 | 1 |
| 2007 | 3 | 2 |
| 2008 | 1 | 2 |
| 2009 | 2 | 0 |
| 2010 | 0 | 2 |
| 2011 | 1 | 4 |
| 2012 | 0 | 0 |
| 2013 | 1 | 3 |
| 2014 | 1 | 3 |
| 2015 | 4 | 1 |
| 2016 | 3 | 4 |
| 2017 | 5 | 2 |
| 2018 | 2 | 5 |
| 2019 | 0 | 3 |
| 2020 | 4 | 2 |
| 2021 | 3 | 2 |
| 2022 | 1 | 1 |
| 2023 | 0 | 2 |
| 2024 | 2 | 2 |
| 2025 | 1 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wall flush valve22 Sep 2026US 12,742,321 B2Kohler Co.
- Connecting rod drive mechanism for water discharge valve and water discharge valve having said mechanism14 Apr 2026US 12,601,421 B2Xiamen R&T Plumbing Technology Co., Ltd.
- Rigid piston for use in a flush valve2 Sep 2025US 12,404,949 B2SDB IP Holdings, LLC
- Flush water tank apparatus and flush toilet apparatus provided with the same16 Jul 2024US 12,037,779 B2Toto Ltd.
- Rigid piston valve incorporating a solenoid30 Jan 2024US 11,885,432 B2SDB IP Holdings, LLC
- Flush valve assembly18 Jun 2026US 2026/0168224 A1
- Wall flush valve27 Feb 2025US 2025/0067035 A1Kohler Co.
- Dual Flush Flushometer System3 Oct 2024US 2024/0328531 A1Sloan Valve Cpmpany
- Rigid Piston Valve Incorporating a Solenoid11 Apr 2024US 2024/0117893 A1SDB IP Holdings, LLC
- Connecting rod drive mechanism for water discharge valve and water discharge valve having said mechanism20 Jul 2023US 2023/0228344 A1Xiamen R&T Plumbing Technology Co., Ltd.
Most cited
By later US patents
- Water flow control system83US 5,341,839 AToto Ltd. · 1994
- Flush valves78US 4,272,052 AZurn Industries, LLC · 1981
- Flushometer piston77US 5,881,993 ASloan Valve Company · 1999
- Water flow control system74US 5,362,026 AToto Ltd. · 1994
- Pressure flush tank for toilets49US 4,233,698 AWater Control Products/N.A., Inc. · 1980