F16F 1/18
Leaf springs
Official title: Leaf springs {(planar springs in general F16F1/027; "Belleville"-type springs with generally radial arms F16F1/324)}
F16F1/18 (Leaf springs) appears on 447 US grants and 401 published applications in this corpus.
Search patents in F16F- Granted patents
- 447
- Published applications
- 401
- Assignees
- 311
- Inventors
- 1,030
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 6 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 7 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 9 | 0 |
| 1988 | 7 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 6 | 0 |
| 1992 | 4 | 0 |
| 1993 | 15 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 5 | 0 |
| 2000 | 9 | 0 |
| 2001 | 8 | 2 |
| 2002 | 9 | 9 |
| 2003 | 6 | 17 |
| 2004 | 9 | 5 |
| 2005 | 5 | 5 |
| 2006 | 2 | 9 |
| 2007 | 3 | 14 |
| 2008 | 2 | 2 |
| 2009 | 5 | 4 |
| 2010 | 7 | 6 |
| 2011 | 0 | 11 |
| 2012 | 3 | 9 |
| 2013 | 10 | 15 |
| 2014 | 9 | 20 |
| 2015 | 15 | 18 |
| 2016 | 12 | 22 |
| 2017 | 20 | 26 |
| 2018 | 22 | 33 |
| 2019 | 21 | 34 |
| 2020 | 31 | 31 |
| 2021 | 27 | 24 |
| 2022 | 19 | 17 |
| 2023 | 24 | 21 |
| 2024 | 20 | 20 |
| 2025 | 14 | 19 |
| 2026 | 11 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Biased pawl ratcheting wrench29 Sep 2026US 12,746,643 B2Great Star Tools USA, Inc.
- Flat spring4 Aug 2026US 12,698,814 B2Christian Bauer GmbH + Co.
- Austenite stainless steel material, method for producing same, and plate spring21 Jul 2026US 12,686,907 B2Nippon Steel Corporation
- Self-retaining spring for flat-wiping contacts21 Jul 2026US 12,687,209 B2IDEAL Industries, Inc.
- Composite tape spring with engineered deployment energy using nanoparticles and methods of making21 Jul 2026US 12,687,210 B1UNM Rainforest Innovations
- Channel member, liquid discharge head, liquid discharge apparatus, and three-dimensional fabrication apparatus1 Oct 2026US 2026/0296008 A1
- Spring assembly, camera module, and electronic device20 Aug 2026US 2026/0243324 A1Toppan Holdings Inc.
- Feed tower mounted leaf springs for magazines13 Aug 2026US 2026/0235375 A1
- Pressing spring device9 Jul 2026US 2026/0194118 A1NHK Spring Co., Ltd.
- Structure and method for manufacturing the same2 Jul 2026US 2026/0185578 A1Nature Architects Inc.
Most cited
By later US patents
- Powered wheelchair with a detachable power drive assembly110US 5,351,774 AQuickie Designs Inc. · 1994
- Structure for attaching spring91US 7,434,879 B2Kokuyo Furniture Co., Ltd. · 2008
- Energy-storing prosthesis leg pylon vertical shock leg88US 5,458,656 AFlex-Foot, Inc. · 1995
- Powered wheelchair with a detachable power drive assembly83US 5,531,284 AQuickie Designs Inc. · 1996
- Vehicle and vehicle suspension77US 6,371,263 B12002