F04B 43/1136
With two or more pumping chambers in parallel
Official title: {with two or more pumping chambers in parallel}
F04B43/1136 (With two or more pumping chambers in parallel) appears on 56 US grants and 45 published applications in this corpus.
Search patents in F04B- Granted patents
- 56
- Published applications
- 45
- Assignees
- 36
- Inventors
- 90
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 5 |
| 2011 | 0 | 1 |
| 2012 | 2 | 0 |
| 2013 | 3 | 3 |
| 2014 | 1 | 2 |
| 2015 | 1 | 2 |
| 2016 | 3 | 2 |
| 2017 | 0 | 2 |
| 2018 | 2 | 2 |
| 2019 | 3 | 3 |
| 2020 | 3 | 5 |
| 2021 | 2 | 2 |
| 2022 | 5 | 3 |
| 2023 | 2 | 1 |
| 2024 | 2 | 2 |
| 2025 | 2 | 2 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Expandable, inner liner pump7 Jul 2026US 12,674,450 B2Viking Pump, Inc.
- Conveying device17 Feb 2026US 12,553,430 B2Hydac Technology GmbH
- Air compression system13 Jan 2026US 12,523,214 B2
- Bellows pump device28 Oct 2025US 12,454,948 B2Pillar Corporation
- Expandable, inner liner pump13 May 2025US 12,297,825 B2Viking Pump, Inc.
- Expandable, inner liner pump1 Oct 2026US 2026/0298221 A1Viking Pump, Inc.
- Bellows pump device11 Jun 2026US 2026/0160241 A1Nippon Pillar Packing Co., Ltd.
- Expandable, inner liner pump17 Jul 2025US 2025/0230810 A1Viking Pump, Inc.
- Bellows pump device10 Jul 2025US 2025/0223955 A1Pillar Corporation
- Air compression system, requiring on mechanical compressor, electricity, or other external energy to operate12 Sep 2024US 2024/0301822 A1
Most cited
By later US patents
- Linear peristaltic pump249US 6,213,739 B1Niagara Pump Corporation · 2001
- Bellows pump52US 4,902,206 AHaluna Kabushiki Kaisha · 1990
- Pneumatically shifted reciprocating pump50US 5,558,506 A1996
- Dual chamber pump46US 5,573,385 AAsti Sae · 1996
- Air-operated high-temperature corrosive liquid pump42US 5,195,878 AHytec Flow Systems · 1993