F04C 18/165
Having more than two rotary pistons with parallel axes
Official title: {having more than two rotary pistons with parallel axes}
F04C18/165 (Having more than two rotary pistons with parallel axes) appears on 41 US grants and 40 published applications in this corpus.
Search patents in F04C- Granted patents
- 41
- Published applications
- 40
- Assignees
- 18
- Inventors
- 60
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 2 | 2 |
| 2004 | 1 | 1 |
| 2005 | 2 | 4 |
| 2006 | 1 | 2 |
| 2007 | 1 | 2 |
| 2008 | 1 | 3 |
| 2009 | 1 | 3 |
| 2010 | 1 | 1 |
| 2011 | 5 | 3 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 2 |
| 2015 | 2 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 2 |
| 2020 | 1 | 2 |
| 2021 | 2 | 3 |
| 2022 | 2 | 1 |
| 2023 | 1 | 0 |
| 2024 | 3 | 5 |
| 2025 | 3 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Scavenge loss limiter for a rotary compressor12 May 2026US 12,624,696 B2Ingersoll-Rand Industrial U.S., Inc.
- Screw pump with a tapered suction-side section and a pressure-side section with a decreasing clearance5 Aug 2025US 12,378,961 B2Leybold Aktiengesellschaft
- Rotor assembly, compressor and air conditioner20 May 2025US 12,305,641 B2Gree Electric Appliances, Inc. of Zhuhai
- Scavenge loss limiter for a rotary compressor4 Feb 2025US 12,215,692 B1Ingersoll-Rand Industrial U.S., Inc.
- Compressor with two rotors coaxially disposed on a connecting assembly sleeved on the shaft that limits relative movement between them24 Sep 2024US 12,098,720 B2Gree Electric Appliances, Inc. of Zhuhai
- Screw pump and its components25 Jun 2026US 2026/0175493 A1Illiois Tool Works Inc.
- Screw pump and its components9 Oct 2025US 2025/0314248 A1Illinois Tool Works Inc.
- Scavenge loss limiter for a rotary compressor21 Aug 2025US 2025/0264103 A1Ingersoll-Rand Industrial U.S., Inc.
- Screw pump, screw rotor, method of manufacturing a screw rotor, and use of a screw pump or a screw rotor3 Oct 2024US 2024/0328419 A1Leybold Aktiengesellschaft
- Screw assembly for a triple screw pump and triple screw pump comprising said assembly18 Apr 2024US 2024/0125322 A1Settima Meccanica S.r.l.
Most cited
By later US patents