F04B 49/12
Control: by varying the length of stroke of the working members
Official title: by varying the length of stroke of the working members
F04B49/12 (Control: by varying the length of stroke of the working members) appears on 544 US grants and 432 published applications in this corpus.
Search patents in F04B- Granted patents
- 544
- Published applications
- 432
- Assignees
- 327
- Inventors
- 1,059
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 14 | 0 |
| 1978 | 11 | 0 |
| 1979 | 6 | 0 |
| 1980 | 10 | 0 |
| 1981 | 9 | 0 |
| 1982 | 11 | 0 |
| 1983 | 4 | 0 |
| 1984 | 9 | 0 |
| 1985 | 9 | 0 |
| 1986 | 2 | 0 |
| 1987 | 11 | 0 |
| 1988 | 7 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 10 | 0 |
| 1992 | 7 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 10 | 0 |
| 1998 | 9 | 0 |
| 1999 | 11 | 0 |
| 2000 | 18 | 0 |
| 2001 | 17 | 2 |
| 2002 | 10 | 9 |
| 2003 | 10 | 10 |
| 2004 | 7 | 6 |
| 2005 | 6 | 7 |
| 2006 | 4 | 5 |
| 2007 | 2 | 6 |
| 2008 | 1 | 3 |
| 2009 | 3 | 9 |
| 2010 | 4 | 13 |
| 2011 | 3 | 10 |
| 2012 | 6 | 14 |
| 2013 | 5 | 19 |
| 2014 | 10 | 16 |
| 2015 | 16 | 25 |
| 2016 | 15 | 25 |
| 2017 | 15 | 28 |
| 2018 | 17 | 35 |
| 2019 | 26 | 31 |
| 2020 | 24 | 25 |
| 2021 | 27 | 36 |
| 2022 | 27 | 24 |
| 2023 | 21 | 24 |
| 2024 | 25 | 18 |
| 2025 | 22 | 18 |
| 2026 | 11 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Rotary swash plate hydraulic pump15 Sep 2026US 12,736,037 B2Kawasaki Jukogyo Kabushiki Kaisha
- Rotary swash plate hydraulic pump1 Sep 2026US 12,723,576 B2Kawasaki Jukogyo Kabushiki Kaisha
- Dosing pump with stroke adjustment1 Sep 2026US 12,723,584 B2ProMinent GmbH
- Calibratable variable displacement pump4 Aug 2026US 12,698,767 B2Fluid Metering, Inc.
- Negative pressure wound therapy apparatus and methods19 May 2026US 12,629,466 B2Smith & Nephew, Inc.
- Volumetric variable displacement machine8 Oct 2026US 2026/0309147 A1
- Systems and method for dynamically calibrating a fluid dispensing system8 Oct 2026US 2026/0310243 A1Zaxis, Inc.
- Negative pressure wound therapy apparatus and methods17 Sep 2026US 2026/0273165 A1Smith & Nephew, Inc.
- Pump system20 Aug 2026US 2026/0243247 A1
- Variable displacement pump6 Aug 2026US 2026/0226889 A1Micro Matic USA, Inc.
Most cited
By later US patents
- System and methods for control of pumps employing electrical field sensing366US 6,261,065 B1Baxter International Inc. · 2001
- Disposable ambulatory microprocessor controlled volumetric pump249US 5,807,075 ASarcos Corp. · 1998
- Tube occluder for occluding collapsible tubes240US 7,559,524 B2DEKA Products Limited Partnership · 2009
- Tube occluder and method for occluding collapsible tubes210US 6,877,713 B1DEKA Products Limited Partnership · 2005
- Intravenous liquid pumping system and method191US 4,468,222 AValleylab, Inc. · 1984