F04C 2230/231
By welding
Official title: by welding
F04C2230/231 (By welding) appears on 81 US grants and 98 published applications in this corpus.
Search patents in F04C- Granted patents
- 81
- Published applications
- 98
- Assignees
- 55
- Inventors
- 248
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2000 | 2 | 0 |
| 2001 | 4 | 1 |
| 2002 | 4 | 5 |
| 2003 | 3 | 2 |
| 2004 | 0 | 10 |
| 2005 | 3 | 1 |
| 2006 | 2 | 4 |
| 2007 | 3 | 3 |
| 2008 | 4 | 4 |
| 2009 | 2 | 4 |
| 2010 | 3 | 4 |
| 2011 | 1 | 3 |
| 2012 | 3 | 3 |
| 2013 | 2 | 3 |
| 2014 | 3 | 1 |
| 2015 | 4 | 2 |
| 2016 | 1 | 7 |
| 2017 | 3 | 3 |
| 2018 | 2 | 6 |
| 2019 | 2 | 3 |
| 2020 | 6 | 5 |
| 2021 | 4 | 4 |
| 2022 | 5 | 6 |
| 2023 | 0 | 6 |
| 2024 | 8 | 4 |
| 2025 | 6 | 1 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Compressor including refrigerant introduction tube10 Feb 2026US 12,546,317 B2Daikin Industries, Ltd.
- Compressor with bottom cover and bearing block arrangement16 Dec 2025US 12,497,966 B2Copeland Climate Technologies (Suzhou) Co. Ltd.
- Horizontal compressor16 Dec 2025US 12,497,967 B2Samsung Electronics Co., Ltd.
- Hermetic compressor23 Sep 2025US 12,421,951 B2Fujitsu General Limited
- Rotary compressor12 Aug 2025US 12,385,488 B1Rechi Precision Co., Ltd.
- Compliant bearing housing for compressor systems13 Aug 2026US 2026/0235123 A1
- Progressive cavity fluid pump and associated methods12 Mar 2026US 2026/0071621 A1Thru Tubing Solutions, Inc.
- Progressive cavity fluid pump and associated methods5 Mar 2026US 2026/0063125 A1
- Compressor and refrigeration apparatus22 May 2025US 2025/0163914 A1Daikin Industries, Ltd.
- Hermetic type compressor15 Aug 2024US 2024/0271607 A1Fujitsu General Limited
Most cited
By later US patents
- Scroll compressor having separation plate between high and low pressures15US 6,017,203 AMitsubishi Denki Kabushiki Kaisha · 2000
- Refrigeration system having a rotary compressor13US 7,128,540 B2Sanyo Electric Co., Ltd. · 2006
- Electric power terminal feed-through12US 7,745,725 B2Emerson Electric Co. · 2010
- Seal structure for casing11US 6,193,485 B1Daikin Industries, Ltd. · 2001
- Pump equipment with plural rotary pumps and method for assembling same11US 6,264,451 B1Denso Corporation · 2001