F04B 39/023
Hermetic compressors
Official title: {Hermetic compressors}
F04B39/023 (Hermetic compressors) appears on 336 US grants and 356 published applications in this corpus.
Search patents in F04B- Granted patents
- 336
- Published applications
- 356
- Assignees
- 126
- Inventors
- 791
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 9 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 8 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 7 | 0 |
| 1999 | 4 | 0 |
| 2000 | 7 | 0 |
| 2001 | 6 | 1 |
| 2002 | 10 | 10 |
| 2003 | 5 | 3 |
| 2004 | 6 | 14 |
| 2005 | 6 | 13 |
| 2006 | 7 | 16 |
| 2007 | 4 | 7 |
| 2008 | 7 | 5 |
| 2009 | 4 | 13 |
| 2010 | 3 | 22 |
| 2011 | 7 | 13 |
| 2012 | 6 | 16 |
| 2013 | 6 | 17 |
| 2014 | 13 | 18 |
| 2015 | 9 | 16 |
| 2016 | 15 | 15 |
| 2017 | 14 | 22 |
| 2018 | 12 | 16 |
| 2019 | 17 | 17 |
| 2020 | 12 | 25 |
| 2021 | 19 | 20 |
| 2022 | 17 | 13 |
| 2023 | 11 | 22 |
| 2024 | 16 | 6 |
| 2025 | 12 | 7 |
| 2026 | 7 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Refrigerant compressor15 Sep 2026US 12,736,041 B2Secop GmbH
- Compressor18 Aug 2026US 12,710,034 B2Samsung Electronics Co., Ltd.
- Reciprocating compressor with dual oil pump28 Jul 2026US 12,692,852 B2Samsung Electronics Co., Ltd.
- Refrigerant compressor including an oil level sensor arrangement26 May 2026US 12,638,324 B2Danfoss Commercial Compressors
- Reciprocating compressor19 May 2026US 12,631,169 B2LG Electronics Inc.
- Refrigerant compressor13 Aug 2026US 2026/0235336 A1Secop GmbH
- Refrigeration apparatus30 Jul 2026US 2026/0218948 A1Daikin Industries, Ltd.
- Compressor11 Jun 2026US 2026/0160253 A1Daikin Industries, Ltd.
- Dry-sump reciprocating piston compressor with lubricant circuit14 May 2026US 2026/0132776 A1Officine Mario Dorin S.P.A.
- Electrode terminal, compressor and refrigeration device14 May 2026US 2026/0135328 A1Guangdong Meizhi Compressor Co., Ltd.
Most cited
By later US patents
- Combination sight glass and sump oil level sensor for a hermetic compressor102US 6,276,901 B1Tecumseh Products Company · 2001
- Rotary compressor with fluid diode check value for lubricating pump53US 4,385,875 ATokyo Shibaura Denki Kabushiki Kaisha · 1983
- Vented compressor lubrication system47US 5,176,506 ACopeland Corporation · 1993
- Two stage reciprocating compressors and associated HVAC system and methods47US 6,389,823 B1Bristol Compressors, Inc. · 2002
- Two stage reciprocating compressors and associated HVAC systems and methods35US 6,132,177 ABristol Compressors, Inc. · 2000