B60N 2/548
Torsion springs
Official title: {Torsion springs, e.g. torsion helicoidal springs}
B60N2/548 (Torsion springs) appears on 49 US grants and 38 published applications in this corpus.
Search patents in B60N- Granted patents
- 49
- Published applications
- 38
- Assignees
- 29
- Inventors
- 90
- Latest grant
- 27 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 1 |
| 2007 | 2 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 4 |
| 2011 | 1 | 2 |
| 2012 | 3 | 6 |
| 2013 | 3 | 0 |
| 2014 | 1 | 3 |
| 2015 | 0 | 2 |
| 2016 | 3 | 1 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 1 | 2 |
| 2020 | 2 | 3 |
| 2021 | 1 | 4 |
| 2022 | 2 | 2 |
| 2023 | 2 | 2 |
| 2024 | 2 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Grounds maintenance vehicle with adjustable suspension system27 May 2025US 12,311,818 B2The Toro Company
- Seat suspension mechanism3 Sep 2024US 12,077,073 B2Delta Kogyo Co., Ltd.
- Seat suspension mechanism11 Jun 2024US 12,005,820 B2Delta Kogyo Co., Ltd.
- Active seat suspension systems including systems with non-back-drivable actuators31 Oct 2023US 11,801,780 B2ClearMotion Acquisition I LLC
- Grounds maintenance vehicle with adjustable suspension system1 Aug 2023US 11,712,984 B2The Toro Company
- Grounds maintenance vehicle with adjustable suspension system7 Aug 2025US 2025/0249807 A1The Toro Company
- Grounds maintenance vehicle with adjustable suspension system5 Oct 2023US 2023/0311725 A1The Toro Company
- Grounds maintenance vehicle with adjustable suspension system9 Mar 2023US 2023/0070865 A1The Toro Company
- Seat suspension mechanism15 Dec 2022US 2022/0396187 A1Delta Kogyo Co., Ltd.
- Seat suspension mechanism24 Nov 2022US 2022/0371488 A1Delta Kogyo Co., Ltd.
Most cited
By later US patents
- Seat suspension device55US 4,729,539 ATachi-S Co., Ltd. · 1988
- Shock absorbing vehicle seat assembly48US 5,758,859 AU.S. Government as represented by the Secretary of the Army · 1998
- Seat suspension system46US 4,198,092 AFMC Corporation · 1980
- Base net supporting mechanism for seat and seat structure thereof35US 7,416,256 B2Delta Tooling Co., Ltd. · 2008
- Vehicle seats32US 4,286,765 AUop LLC · 1981