F15B 21/0423
Cooling
F15B21/0423 (Cooling) appears on 158 US grants and 164 published applications in this corpus.
Search patents in F15B- Granted patents
- 158
- Published applications
- 164
- Assignees
- 115
- Inventors
- 384
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 3 | 4 |
| 2004 | 2 | 5 |
| 2005 | 4 | 1 |
| 2006 | 0 | 2 |
| 2007 | 3 | 6 |
| 2008 | 0 | 2 |
| 2009 | 0 | 4 |
| 2010 | 2 | 1 |
| 2011 | 5 | 8 |
| 2012 | 1 | 3 |
| 2013 | 2 | 4 |
| 2014 | 4 | 4 |
| 2015 | 5 | 6 |
| 2016 | 4 | 3 |
| 2017 | 4 | 5 |
| 2018 | 2 | 5 |
| 2019 | 6 | 8 |
| 2020 | 8 | 11 |
| 2021 | 16 | 18 |
| 2022 | 16 | 17 |
| 2023 | 13 | 10 |
| 2024 | 11 | 14 |
| 2025 | 12 | 10 |
| 2026 | 7 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Transportation vehicle22 Sep 2026US 12,742,411 B2Hitachi Construction Machinery Co., Ltd.
- Hydraulic system with cooling circuit and machine tool8 Sep 2026US 12,729,701 B2HAWE Hydraulik SE
- Hydraulic system having a conditioning circuit4 Aug 2026US 12,698,788 B2Robert Bosch GmbH
- Hydraulic unit24 Mar 2026US 12,584,504 B2Daikin Industries, Ltd.
- Hydraulic circuit control device and molding machine17 Mar 2026US 12,577,963 B2Aisin Corporation
- Construction Machine3 Sep 2026US 2026/0257547 A1Putzmeister Engineering GmbH
- Integrated Electrohydraulic Actuator30 Jul 2026US 2026/0218734 A1Parker-Hannifin Corporation
- Transportation Vehicle9 Jul 2026US 2026/0194001 A1Hitachi Construction Machinery Co., Ltd.
- Hydraulic System having a Conditioning Circuit25 Jun 2026US 2026/0177085 A1Robert Bosch GmbH
- Cooling nozzle vanes of a turbine engine18 Jun 2026US 2026/0168385 A1Rtx Corporation
Most cited
By later US patents
- Control apparatus and method for automatically controlling a hydraulic system for heavy construction equipment45US 5,251,440 ASamsung Heavy Industries Co., Ltd. · 1993
- Device for cooling components by means of hydraulic fluid from a hydraulic circuit43US 6,672,056 B2Linde Aktiengesellschaft · 2004
- Servovalve27US 10,962,143 B2Hamilton Sunstrand Corporation · 2021
- Hydraulic unit20US 5,725,361 AMannesmann Rexroth GmbH · 1998
- Constant speed hydraulic motor18US 4,022,021 A1977