F04B 15/023
Supply of fluid to the pump by gravity through a hopper
Official title: {supply of fluid to the pump by gravity through a hopper, e.g. without intake valve}
F04B15/023 (Supply of fluid to the pump by gravity through a hopper) appears on 142 US grants and 104 published applications in this corpus.
Search patents in F04B- Granted patents
- 142
- Published applications
- 104
- Assignees
- 73
- Inventors
- 239
- Latest grant
- 12 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 1 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 1 |
| 2002 | 5 | 0 |
| 2003 | 1 | 6 |
| 2004 | 4 | 3 |
| 2005 | 2 | 2 |
| 2006 | 3 | 7 |
| 2007 | 1 | 6 |
| 2008 | 2 | 4 |
| 2009 | 3 | 5 |
| 2010 | 2 | 5 |
| 2011 | 3 | 6 |
| 2012 | 3 | 5 |
| 2013 | 4 | 3 |
| 2014 | 2 | 5 |
| 2015 | 4 | 4 |
| 2016 | 1 | 5 |
| 2017 | 4 | 0 |
| 2018 | 4 | 6 |
| 2019 | 3 | 4 |
| 2020 | 3 | 10 |
| 2021 | 2 | 5 |
| 2022 | 6 | 5 |
| 2023 | 4 | 5 |
| 2024 | 6 | 1 |
| 2025 | 2 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydro excavation vacuum apparatus and fluid storage and supply systems thereof12 Aug 2025US 12,385,215 B2Vermeer Manufacturing Company
- Vacuum excavation apparatus having a deceleration vessel and methods for excavating a site15 Apr 2025US 12,276,080 B2Vermeer Manufacturing Company
- Powder supply apparatus1 Oct 2024US 12,102,110 B2Yutaka Mfg. Co., Ltd.
- Computer-aided method and device for optimized control of the delivery rate of a concrete pump or the like10 Sep 2024US 12,085,070 B2Peri SE
- Hydro excavation vacuum apparatus3 Sep 2024US 12,077,936 B2Vermeer Manufacturing Company
- Thick material pump and method for operating a thick material pump30 Apr 2026US 2026/0117757 A1Putzmeister Engineering GmbH
- Operation monitoring for a thick matter conveying system5 Sep 2024US 2024/0295132 A1Putzmeister Engineering GmbH
- Method for Operating a Construction-Material And/or Viscous-Material Pump for Conveying Construction Material And/or Viscous Material, and Construction-Material And/or Viscous-Material Pump for Conveying Construction Material And/or Viscous Material24 Aug 2023US 2023/0265843 A1Putzmeister Engineering GmbH
- Pump with a lubricant reservoir6 Apr 2023US 2023/0109102 A1DROPSA S.p.A.
- Powder supply apparatus2 Feb 2023US 2023/0029502 A1Yutaka Mfg. Co., Ltd.
Most cited
By later US patents
- High pressure pumping apparatus for semi-fluid material28US 4,533,300 A1985
- Concrete pumping apparatus21US 4,036,564 A1977
- Machine for continuous pumping of plastic materials21US 4,097,962 AMarlen Research Corporation · 1978
- Method and device for suppressing vibration of boom of concrete pump truck18US 8,037,682 B2Sany Heavy Industry Co., Ltd. · 2011
- Positive double-piston displacement pump conveying pasteous material16US 4,653,990 A1987