B60T 15/20
Controlled by two fluid pressures
Official title: controlled by two fluid pressures
B60T15/20 (Controlled by two fluid pressures) appears on 84 US grants and 41 published applications in this corpus.
Search patents in B60T- Granted patents
- 84
- Published applications
- 41
- Assignees
- 45
- Inventors
- 166
- Latest grant
- 9 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 2 |
| 2015 | 1 | 3 |
| 2016 | 1 | 0 |
| 2017 | 4 | 5 |
| 2018 | 3 | 5 |
| 2019 | 2 | 0 |
| 2020 | 4 | 4 |
| 2021 | 1 | 8 |
| 2022 | 3 | 2 |
| 2023 | 6 | 3 |
| 2024 | 4 | 1 |
| 2025 | 1 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Trailer brake control module9 Sep 2025US 12,409,826 B2Zf Cv Systems Europe BV
- Auxiliary brake system for outdoor grounds maintenance vehicles having hydrostatic traction drive systems3 Dec 2024US 12,157,443 B2The Toro Company
- Method for the brake control of a vehicle combination26 Nov 2024US 12,151,662 B2Zf Cv Systems Europe BV
- Valve arrangement24 Sep 2024US 12,097,830 B2KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
- Brake control valve arrangement20 Aug 2024US 12,065,120 B2Knorr-Bremse Systeme FüR Schienenfahrzeuge GmbH
- Control valve assembly for a hydraulic braking system of a vehicle connected to a trailer27 Aug 2026US 2026/0249825 A1Raicam Driveline S.R.L.
- Trailer control valve and method for controlling a trailer brake pressure21 May 2026US 2026/0138579 A1
- Trailer control module with tractor protection function9 Jan 2025US 2025/0010838 A1
- Trailer Control Module for a Brake Device, and Parking Brake Device5 Dec 2024US 2024/0400023 A1KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
- Trailer brake control module14 Dec 2023US 2023/0398973 A1Zf Cv Systems Europe BV
Most cited
By later US patents
- Method of determining maximum service brake reduction44US 6,487,488 B1New York Air Brake Corporation · 2002
- Truck mounted pneumatic brake control system26US 4,653,812 AGeneral Signal Corporation · 1987
- Full-function valve for heavy duty semi-trailer brake systems23US 5,236,250 AMidland Brake, Inc. · 1993
- Combined load-sensing proportion and relay valve for an air brake system21US 3,944,294 AJidosha Kiki Co., Ltd. · 1976
- Vehicle air brake system with emergency features19US 4,121,873 AMidland-Ross Corporation · 1978