B60T 13/38
Brakes applied by springs or weights and released by compressed air
Official title: Brakes applied by springs or weights and released by compressed air {(B60T13/261 takes precedence)}
B60T13/38 (Brakes applied by springs or weights and released by compressed air) appears on 148 US grants and 175 published applications in this corpus.
Search patents in B60T- Granted patents
- 148
- Published applications
- 175
- Assignees
- 77
- Inventors
- 364
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 2 |
| 2005 | 1 | 1 |
| 2006 | 2 | 5 |
| 2007 | 2 | 1 |
| 2008 | 0 | 0 |
| 2009 | 2 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 4 |
| 2012 | 0 | 1 |
| 2013 | 1 | 2 |
| 2014 | 3 | 3 |
| 2015 | 1 | 2 |
| 2016 | 3 | 4 |
| 2017 | 3 | 6 |
| 2018 | 5 | 5 |
| 2019 | 5 | 7 |
| 2020 | 3 | 12 |
| 2021 | 12 | 17 |
| 2022 | 13 | 22 |
| 2023 | 11 | 14 |
| 2024 | 18 | 26 |
| 2025 | 13 | 27 |
| 2026 | 12 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Drum brake6 Oct 2026US 12,753,808 B2KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
- Electropneumatic valve assembly with self-locking safety valve15 Sep 2026US 12,735,015 B2ZF CV Systems Global GmbH
- Electro-pneumatic hand brake system1 Sep 2026US 12,722,614 B2Zf Cv Systems Europe BV
- Compressed-air supply arrangement of a pneumatic brake system, and method for engaging a parking brake by limiting the delivery rate25 Aug 2026US 12,715,410 B2ZF CV Systems Global GmbH
- Diaphragm arrangement for a spring brake actuator of a pneumatic braking system of a vehicle25 Aug 2026US 12,715,415 B2Zf Cv Systems Europe BV
- Electro-Pneumatic Brake Device with Automatic Ventilation of the Spring Brake24 Sep 2026US 2026/0285277 A1KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
- System and Method for Conditionally Releasing a Parking Brake of a Trailer13 Aug 2026US 2026/0233722 A1Bendix Commercial Vehicle Systems LLC
- Electronic circuit30 Jul 2026US 2026/0217232 A1ZF CV Systems Global GmbH
- Combined service brake and spring brake cylinder with service brake cylinder mounted inside the spring brake cylinder9 Jul 2026US 2026/0192790 A1Knorr-Bremse Systeme fur Nutzfahrzeuge GmbH
- Electro-Pneumatic Structural Unit and Electro-Pneumatic Brake Device With Double Redundancy and Brake Slip Control25 Jun 2026US 2026/0175826 A1KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
Most cited
By later US patents
- Disposal vehicle59US 3,966,067 AFrodsham, E. Dale · 1976
- Tractor protection control system46US 5,061,015 AAllied-Signal Inc. · 1991
- Brake mechanism with spring applied fluid pressure released assembly37US 4,057,297 A1977
- Electro-pneumatic tractor-trailer brake system21US 4,877,294 ANavistar International Transportation Corp. · 1989
- System for preventing the movement of vehicles having air brakes19US 5,735,147 A1998