B21H 3/025
Rolling locking screws
Official title: {Rolling locking screws}
B21H3/025 (Rolling locking screws) appears on 17 US grants and 5 published applications in this corpus.
Search patents in B21H- Granted patents
- 17
- Published applications
- 5
- Assignees
- 10
- Inventors
- 22
- Latest grant
- 22 Dec 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 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 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 3 |
| 2019 | 2 | 0 |
| 2020 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Screw thread structure for preventing being pulled out and tool for manufacturing same22 Dec 2020US 10,871,182 B2Dae Kwang Metal.Co.Ltd
- Dual-threaded screw structure31 Dec 2019US 10,519,995 B2Form Roll Tech Co., Ltd.
- Metric self-tapping locking screw and the manufacturing method thereof20 Aug 2019US 10,385,903 B2Essence Fastening System (Shanghai) Co., Ltd.
- Compound die for dual thread forming9 May 2017US 9,643,237 B1
- Anti-loose screw and a die device for forming same22 Sep 2015US 9,140,292 B2
- Metric self-tapping locking screw and the manufacturing method thereof9 Aug 2018US 2018/0223889 A1Essence Fastening System (Shanghai) Co., Ltd.
- Dual-threaded screw structure14 Jun 2018US 2018/0163757 A1Form Roll Tech Co., Ltd.
- Screw thread structure for preventing being pulled out and tool for manufacturing same4 Jan 2018US 2018/0003212 A1Dae Kwang Metal.Co.Ltd
- Anti-loosen Screw Manufacturing Method and Screw Member Produced Thereby25 May 2017US 2017/0146051 A1
- Anti-Loose Screw and a Die Device for Forming Same19 Feb 2015US 2015/0050102 A1
Most cited
By later US patents
- Screw threaded members and their manufacture62US 4,237,948 ARubery Owen Fasteners Limited · 1980
- Screw with groove for self-lock and method and rolling flat die for manufacturing the same33US 4,764,067 AJSM Screw Co., Ltd. · 1988
- Self-locking threaded fastener19US 4,351,626 A1982
- Rolling flat die for manufacturing a screw with groove for self-locking16US 4,782,688 AJSM Screw Co., Ltd. · 1988
- Method of producing a vibration resistant fastener10US 4,136,416 ASPS Technologies, Inc. · 1979