B24B 7/167
End faces coil springs
Official title: {end faces coil springs}
B24B7/167 (End faces coil springs) appears on 12 US grants and 6 published applications in this corpus.
Search patents in B24B- Granted patents
- 12
- Published applications
- 6
- Assignees
- 12
- Inventors
- 21
- Latest grant
- 3 Nov 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 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 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 3 |
| 2016 | 3 | 1 |
| 2017 | 2 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Continuous compression wire spring polishing apparatus configured to easily replace two parallel and opposite grindstones3 Nov 2020US 10,821,569 B2Daewon Applied Eng. Co.
- Compression line spring grinding device1 Aug 2017US 9,718,162 B2Dae Won Kang Up Co., Ltd.
- Apparatus and method for grinding compression line spring4 Jul 2017US 9,694,463 B2Dae Won Kang Up Co., Ltd.
- Method for grinding spring with high quality and high efficiency22 Nov 2016US 9,498,864 B2Zhejiang Jiadu Spring Machine Co.,Ltd.
- Grinding machine for the grinding of spring ends17 May 2016US 9,339,910 B2Bennett Mahler Limited
- Continuous Compression Wire Spring Polishing Apparatus Configured to Easily Replace Two Parallel and Opposite Grindstones29 Nov 2018US 2018/0339389 A1Daewon Applied Eng. Co.
- Method for grinding spring with high quality and high efficiency13 Oct 2016US 2016/0297047 A1Zhejiang Jiadu Spring Machine Co.,Ltd.
- Compression line spring grinding device and grinding method10 Dec 2015US 2015/0352685 A1Daewon Kang Up Co., Ltd.
- Apparatus and method for grinding compression line spring22 Oct 2015US 2015/0298277 A1Dae Won Kang Up Co., Ltd.
- Method of grinding spring ends and spring end grinding machine15 Jan 2015US 2015/0017881 A1WAFIOS Aktiengesellschaft
Most cited
By later US patents
- Opposed endless belt grinding apparatus14US 4,676,029 AHelical Springs Limited of Lytham Ind. Est. Park · 1987
- Manufacturing methods for machining spring ends parallel at loaded length11US 5,454,150 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1995
- Grinding machine including means to supply coolant to the work area8US 3,992,820 ASchenker Maschinen AG · 1976
- Grinding machine8US 4,217,734 ASchenker Maschinen AG · 1980
- Grindstone clearance correcting device for spring grinding machine3US 4,358,912 A1982