F04B 19/20
Machines or pumps having pertinent characteristics not provided for in, or of
Official title: Other positive-displacement pumps
F04B19/20 (Machines or pumps having pertinent characteristics not provided for in, or of) appears on 818 US grants and 1,011 published applications in this corpus.
Search patents in F04B- Granted patents
- 818
- Published applications
- 1,011
- Assignees
- 473
- Inventors
- 1,664
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 3 |
| 2002 | 6 | 7 |
| 2003 | 12 | 8 |
| 2004 | 4 | 11 |
| 2005 | 4 | 11 |
| 2006 | 2 | 11 |
| 2007 | 6 | 9 |
| 2008 | 8 | 14 |
| 2009 | 3 | 14 |
| 2010 | 5 | 6 |
| 2011 | 8 | 12 |
| 2012 | 8 | 22 |
| 2013 | 11 | 25 |
| 2014 | 14 | 29 |
| 2015 | 18 | 52 |
| 2016 | 30 | 136 |
| 2017 | 52 | 143 |
| 2018 | 89 | 121 |
| 2019 | 127 | 64 |
| 2020 | 79 | 58 |
| 2021 | 81 | 37 |
| 2022 | 38 | 51 |
| 2023 | 38 | 48 |
| 2024 | 57 | 55 |
| 2025 | 49 | 41 |
| 2026 | 32 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Liquid cooled plunger system6 Oct 2026US 12,753,754 B2Kerr Machine Co.
- Syringe pump6 Oct 2026US 12,753,756 B2Fluid Metering, Inc.
- Pump startup algorithms and related systems and methods29 Sep 2026US 12,746,328 B2ICU Medical, Inc.
- Reciprocating pump seal devices, and associated systems and methods22 Sep 2026US 12,742,446 B2Patriot Acquisitions, LLC
- Single stage reciprocating piston compressor with cooling22 Sep 2026US 12,742,447 B2I-Jack Technologies Incorporated
- Adjustable high pressure packing assembly8 Oct 2026US 2026/0309229 A1Third Coast Innovation LLC
- Mop bucket pump water cleaning mechanism and working method thereof24 Sep 2026US 2026/0283440 A1Gaobeidian Restar Electrical Applicances Manufacture Co., Ltd
- Power end of reciprocating pump24 Sep 2026US 2026/0286955 A1Gd Energy Products, LLC
- Slide displacement pump system10 Sep 2026US 2026/0266273 A1Hydram Research
- Reciprocating pump seal devices, and associated systems and methods27 Aug 2026US 2026/0251133 A1Patriot Acquisitions, LLC
Most cited
By later US patents
- Device and method employing shape memory alloy491US 6,916,159 B2TheraSense, Inc. · 2005
- Mobile, modular, electrically powered system for use in fracturing underground formations358US 9,103,193 B2Evolution Well Services, LLC · 2015
- Membrane pump with stretchable pump membrane348US 6,948,918 B2Novo Nordisk A/S · 2005
- System for pumping hydraulic fracturing fluid using electric pumps342US 9,410,410 B2U.S. Well Services, LLC · 2016
- Mobile, modular, electrically powered system for use in fracturing underground formations334US 9,366,114 B2Evolution Well Services, LLC · 2016