F04C 29/0035
Equalization of pressure pulses
Official title: {Equalization of pressure pulses (silencing F04C29/06)}
F04C29/0035 (Equalization of pressure pulses) appears on 158 US grants and 125 published applications in this corpus.
Search patents in F04C- Granted patents
- 158
- Published applications
- 125
- Assignees
- 102
- Inventors
- 375
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 6 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 8 | 0 |
| 2001 | 4 | 1 |
| 2002 | 2 | 1 |
| 2003 | 3 | 5 |
| 2004 | 6 | 2 |
| 2005 | 3 | 4 |
| 2006 | 0 | 7 |
| 2007 | 2 | 5 |
| 2008 | 0 | 3 |
| 2009 | 2 | 5 |
| 2010 | 1 | 4 |
| 2011 | 4 | 5 |
| 2012 | 3 | 11 |
| 2013 | 6 | 2 |
| 2014 | 4 | 4 |
| 2015 | 10 | 12 |
| 2016 | 4 | 4 |
| 2017 | 6 | 3 |
| 2018 | 5 | 12 |
| 2019 | 4 | 3 |
| 2020 | 6 | 4 |
| 2021 | 5 | 2 |
| 2022 | 5 | 6 |
| 2023 | 5 | 6 |
| 2024 | 7 | 9 |
| 2025 | 8 | 2 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Positive displacement roots blower noise suppression12 May 2026US 12,624,693 B2Ingersoll-Rand Industrial U.S., Inc.
- Pump device, respiratory device and method for providing a respiratory gas24 Mar 2026US 12,582,793 B2Weinmann Emergency Medical Technology GmbH + Co. KG
- Slide valve for a twin-screw compressor30 Sep 2025US 12,429,053 B2Johnson Controls Air Conditioning and Refrigeration (Wuxi) Co., Ltd.
- Scroll compressor26 Aug 2025US 12,398,722 B2LG Electronics Inc.
- Scroll compressor12 Aug 2025US 12,385,485 B2LG Electronics Inc.
- Scroll compressor16 Jul 2026US 2026/0201884 A1Kabushiki Kaisha Toyota Jidoshokki
- Scroll compressor and heat pump device7 May 2026US 2026/0126041 A1Robert Bosch GmbH
- Rotary compressor16 Apr 2026US 2026/0104048 A1Samsung Electronics Co., Ltd.
- Optimized energy recovery device14 Aug 2025US 2025/0257730 A1
- Rotary compressor10 Apr 2025US 2025/0116273 A1Panasonic Intellectual Property Management Co., Ltd.
Most cited
By later US patents
- Portable ventilator system278US 7,188,621 B2Pulmonetic Systems, Inc. · 2007
- Scroll compressor with valved port for each compression chamber91US 4,818,195 AHitachi, Ltd. · 1989
- Mechanical ventilation system utilizing bias valve85US 8,118,024 B2CareFusion 203, Inc. · 2012
- Compressor having refrigerant injection ports70US 5,722,257 ADenso Corporation · 1998
- Shunt pulsation trap for positive-displacement machinery60US 9,732,754 B2Hi-Bar Blowers, Inc. · 2017