B60H 1/3214
For improving the lubrication of a refrigerant compressor in a vehicle
Official title: {for improving the lubrication of a refrigerant compressor in a vehicle}
B60H1/3214 (For improving the lubrication of a refrigerant compressor in a vehicle) appears on 54 US grants and 58 published applications in this corpus.
Search patents in B60H- Granted patents
- 54
- Published applications
- 58
- Assignees
- 26
- Inventors
- 140
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 7 | 11 |
| 2005 | 3 | 3 |
| 2006 | 3 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 1 | 0 |
| 2010 | 2 | 2 |
| 2011 | 0 | 2 |
| 2012 | 2 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 2 |
| 2016 | 1 | 2 |
| 2017 | 1 | 1 |
| 2018 | 2 | 3 |
| 2019 | 4 | 6 |
| 2020 | 1 | 7 |
| 2021 | 3 | 3 |
| 2022 | 5 | 1 |
| 2023 | 2 | 3 |
| 2024 | 2 | 1 |
| 2025 | 4 | 5 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Bypass for heat pump systems23 Sep 2025US 12,420,611 B2Rivian IP Holdings, LLC
- Multi-compressor oil migration mitigation climate system23 Sep 2025US 12,420,616 B2Bergstrom, Inc.
- Compressor control method27 May 2025US 12,311,738 B2Hanon Systems
- Refrigerant circuit compressor gas bearing feed6 May 2025US 12,292,219 B2Trane International Inc.
- Lubricant management for an HVACR system15 Oct 2024US 12,117,222 B2Trane International Inc.
- Refrigerant circuit compressor gas bearing feed16 Jul 2026US 2026/0202110 A1Trane International Inc.
- Control method using electronic expansion valves to regulate oil circulation through refrigerant systems with multiple evaporators21 May 2026US 2026/0138419 A1Ford Global Technologies, LLC
- Variable speed compressor control scheme for lubricant control11 Dec 2025US 2025/0376006 A1Thermo King Corporation
- Multi-compressor oil migration mitigation climate system18 Sep 2025US 2025/0289292 A1Bergstrom, Inc.
- Refrigerant circulation system4 Sep 2025US 2025/0277611 A1Mazda Motor Corporation
Most cited
By later US patents
- Heat pump air conditioner56US 6,314,750 B1Denso Corporation · 2001
- Heat pump type refrigerant cycle system45US 6,237,351 B1Denso Corporation · 2001
- Automotive air conditioner23US 5,884,497 ADenso Corporation · 1999
- Ejector cycle21US 6,834,514 B2Denso Corporation · 2004
- Fluid machine, rankine cycle and control method21US 7,836,696 B2Denso Corporation · 2010