F16D 2121/04
Acting on a piston-type actuator
Official title: acting on a piston-type actuator, e.g. for liquid pressure
F16D2121/04 (Acting on a piston-type actuator) appears on 576 US grants and 779 published applications in this corpus.
Search patents in F16D- Granted patents
- 576
- Published applications
- 779
- Assignees
- 256
- Inventors
- 1,372
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 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 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 2 | 21 |
| 2013 | 8 | 54 |
| 2014 | 19 | 32 |
| 2015 | 35 | 40 |
| 2016 | 33 | 33 |
| 2017 | 34 | 46 |
| 2018 | 38 | 72 |
| 2019 | 64 | 65 |
| 2020 | 58 | 83 |
| 2021 | 62 | 69 |
| 2022 | 52 | 72 |
| 2023 | 50 | 60 |
| 2024 | 47 | 61 |
| 2025 | 34 | 35 |
| 2026 | 36 | 35 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Hydraulic brake with travel adjustment mechanism6 Oct 2026US 12,753,817 B2Cixi Energy Refined Fishing Co., Ltd.
- Hydromechanical brake motive apparatus15 Sep 2026US 12,735,013 B2ZF Active Safety US Inc.
- Anti-rollback braking system for wheelchairs8 Sep 2026US 12,728,053 B2
- Brake mechanism, brake system, and vehicle10 Sep 2026US 2026/0264653 A1Yinwang Intelligent Technologies Co., Ltd.
- Braking device27 Aug 2026US 2026/0249829 A1Advics Co., Ltd.
- Braking assembly for a work vehicle20 Aug 2026US 2026/0241908 A1
- Electro-actuated disc brake caliper, disc brake and braking system20 Aug 2026US 2026/0241913 A1Brembo S.p.A.
- Hydrostatic Rotary Machine with Brake Discs Mounted on Bolts20 Aug 2026US 2026/0243316 A1Robert Bosch GmbH
Most cited
By later US patents
- Modular power distribution and drive system42US 8,393,236 B1Hydro-Gear Limited Partnership · 2013
- Planetary gearbox with integral service brake29US 8,662,277 B2Fairfield Manufacturing Company, Inc. · 2014
- Power parking failsafe disc brake26US 4,014,414 A1977
- Disc brake pack wear indicator23US 4,186,822 AGeneral Motors Corporation · 1980
- Modular power distribution and drive system22US 9,194,473 B1Hydro-Gear Limited Partnership · 2015