B61K 9/04
Detectors for indicating the overheating of axle bearings and the like
Official title: Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault
B61K9/04 (Detectors for indicating the overheating of axle bearings and the like) appears on 140 US grants and 99 published applications in this corpus.
Search patents in B61K- Granted patents
- 140
- Published applications
- 99
- Assignees
- 72
- Inventors
- 242
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 8 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 8 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 3 |
| 2004 | 2 | 2 |
| 2005 | 4 | 5 |
| 2006 | 1 | 2 |
| 2007 | 2 | 3 |
| 2008 | 1 | 9 |
| 2009 | 0 | 2 |
| 2010 | 6 | 4 |
| 2011 | 2 | 3 |
| 2012 | 6 | 4 |
| 2013 | 2 | 8 |
| 2014 | 4 | 2 |
| 2015 | 9 | 6 |
| 2016 | 5 | 9 |
| 2017 | 4 | 5 |
| 2018 | 6 | 3 |
| 2019 | 4 | 8 |
| 2020 | 5 | 4 |
| 2021 | 5 | 2 |
| 2022 | 3 | 4 |
| 2023 | 0 | 1 |
| 2024 | 3 | 2 |
| 2025 | 3 | 4 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for monitoring the state of a wheel of a rail vehicle26 May 2026US 12,637,121 B2Knorr-Bremse Systeme FüR Schienenfahrzeuge GmbH
- Thermometric camera comprising a bolometer sensor and method of determining a temperature of an object in motion by a thermometric camera12 May 2026US 12,625,001 B2Axis AB
- Monitoring system for axles of a vehicle6 Jan 2026US 12,515,716 B2Transportation IP Holdings, LLC
- System, method and apparatus for monitoring the health of railcar wheelsets23 Sep 2025US 12,422,339 B2Amsted Rail Company, Inc.
- Monitoring system of a railroad axle and peripherals17 Jun 2025US 12,330,699 B2Vallourec Tubos Do Brasil Ltda.
- Automated on-wheel thermography for safety and prevention11 Jun 2026US 2026/0159141 A1Delta Thermal, Inc.
- Health evaluation method for train bearing28 May 2026US 2026/0146915 A1Aktiebolaget Skf
- Systems and methods for detecting applied railcar brakes using thermal imaging26 Feb 2026US 2026/0054755 A1BNSF Railway Company
- Automated on-wheel thermography for safety and prevention17 Apr 2025US 2025/0121862 A1Delta Thermal, Inc.
- Imaging and monitoring of high-speed objects17 Apr 2025US 2025/0121864 A1Delta Thermal, Inc.
Most cited
By later US patents
- Bearing with sensor module88US 6,161,962 AThe Timken Company · 2000
- Bearing with wireless self-powered sensor unit70US 6,535,135 B1The Timken Company · 2003
- Temperature monitoring system63US 5,446,452 A1995
- Thermal sensor for detection of railroad bearing failures58US 4,812,826 ACarnegie Mellon University · 1989
- Apparatus for detecting abnormally high temperature conditions in the wheels and bearings of moving railroad cars52US 5,677,533 AScience Applications International Corporation · 1997