F04B 39/0276
The pump being of the reciprocating piston type
Official title: {the pump being of the reciprocating piston type, e.g. oscillating, free-piston compressors}
F04B39/0276 (The pump being of the reciprocating piston type) appears on 50 US grants and 70 published applications in this corpus.
Search patents in F04B- Granted patents
- 50
- Published applications
- 70
- Assignees
- 46
- Inventors
- 163
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 4 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 1 |
| 2013 | 0 | 3 |
| 2014 | 1 | 2 |
| 2015 | 1 | 10 |
| 2016 | 5 | 2 |
| 2017 | 1 | 8 |
| 2018 | 2 | 3 |
| 2019 | 2 | 5 |
| 2020 | 4 | 7 |
| 2021 | 5 | 3 |
| 2022 | 5 | 7 |
| 2023 | 3 | 2 |
| 2024 | 6 | 3 |
| 2025 | 6 | 4 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Reciprocating compressor with dual oil pump28 Jul 2026US 12,692,852 B2Samsung Electronics Co., Ltd.
- Fluid sample pump system9 Jun 2026US 12,650,118 B2Mustang Sampling, LLC
- Oil supply device for compressor, compressor, and refrigeration equipment10 Feb 2026US 12,546,301 B2Haier Smart Home Co., Ltd.
- Oil supply device for compressor, compressor, and refrigeration equipment21 Oct 2025US 12,448,959 B2Haier Smart Home Co., Ltd.
- Linear compressor14 Oct 2025US 12,442,365 B2LG Electronics Inc.
- Compressor oil injection cooling19 Mar 2026US 2026/0078747 A1Thermo King Corporation
- Refrigerating apparatus using non-azeotropic mixed refrigerant1 Jan 2026US 2026/0002710 A1LG Electronics Inc.
- Fluid Sample Pump System21 Aug 2025US 2025/0264092 A1Mustang Sampling, LLC
- Reciprocating compressor with dual oil pump6 Mar 2025US 2025/0075692 A1Samsung Electronics Co., Ltd.
- Oil supply device for compressor, compressor, and refrigeration equipment13 Feb 2025US 2025/0052235 A1Haier Smart Home Co., Ltd.
Most cited
By later US patents
- Oil supply unit of linear compressor12US 6,409,484 B1LG Electronics Inc. · 2002
- Refrigerating system having reciprocating compressor7US 7,404,701 B2LG Electronics Inc. · 2008
- Reciprocating compressor6US 8,109,199 B2LG Electronics Inc. · 2012
- Linear compressor5US 6,571,917 B1LG Electronics Inc. · 2003
- Reciprocating compressor having fluid bearing4US 9,494,148 B2LG Electronics Inc. · 2016