F16D 2121/16
For releasing a normally applied brake
Official title: for releasing a normally applied brake
F16D2121/16 (For releasing a normally applied brake) appears on 126 US grants and 134 published applications in this corpus.
Search patents in F16D- Granted patents
- 126
- Published applications
- 134
- Assignees
- 117
- Inventors
- 331
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 6 | 0 |
| 2001 | 2 | 1 |
| 2002 | 9 | 6 |
| 2003 | 5 | 2 |
| 2004 | 6 | 8 |
| 2005 | 3 | 3 |
| 2006 | 4 | 2 |
| 2007 | 2 | 6 |
| 2008 | 1 | 6 |
| 2009 | 0 | 3 |
| 2010 | 4 | 1 |
| 2011 | 5 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 2 |
| 2014 | 3 | 3 |
| 2015 | 4 | 3 |
| 2016 | 1 | 3 |
| 2017 | 2 | 4 |
| 2018 | 7 | 13 |
| 2019 | 7 | 14 |
| 2020 | 14 | 4 |
| 2021 | 2 | 7 |
| 2022 | 6 | 6 |
| 2023 | 13 | 14 |
| 2024 | 3 | 10 |
| 2025 | 9 | 8 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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- Motion -based fail safe braking for trolleys15 Jan 2026US 2026/0014967 A1Ati Motors Inc.
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Most cited
By later US patents
- Simplified deadman brake25US 6,095,294 A2000
- Brake mechanism for a walker25US 6,378,663 B1Apex Medical Corp. · 2002
- Unidirectional no-back device23US 4,909,363 ASundstrand Corporation · 1990
- Clutch/brake assembly with electrical generation system21US 7,311,184 B2North American Clutch Corporation · 2007
- Mower with automatic parking brake21US 7,677,371 B2Parker-Hannifin Corporation · 2010