B21D 53/261
Pulleys
Official title: {pulleys}
B21D53/261 (Pulleys) appears on 112 US grants and 28 published applications in this corpus.
Search patents in B21D- Granted patents
- 112
- Published applications
- 28
- Assignees
- 57
- Inventors
- 133
- Latest grant
- 31 Mar 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 8 | 0 |
| 1978 | 7 | 0 |
| 1979 | 5 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 4 | 0 |
| 1987 | 6 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 3 |
| 2002 | 8 | 2 |
| 2003 | 4 | 5 |
| 2004 | 1 | 1 |
| 2005 | 2 | 3 |
| 2006 | 3 | 1 |
| 2007 | 2 | 2 |
| 2008 | 0 | 2 |
| 2009 | 2 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 2 | 2 |
| 2016 | 0 | 1 |
| 2017 | 2 | 0 |
| 2018 | 0 | 3 |
| 2019 | 1 | 0 |
| 2020 | 1 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Pulley with line guides31 Mar 2020US 10,604,390 B1Hall Labs LLC
- Welded idler and manufacturing method thereof5 Mar 2019US 10,220,432 B2
- Spinning thickening forming method and spinning thickening forming apparatus26 Dec 2017US 9,849,495 B2Kawasaki Jukogyo Kabushiki Kaisha
- Method and device for reshaping a workpiece by displacing material in the workpiece6 Jun 2017US 9,669,445 B2Leifeld Metal Spinning AG
- Method of manufacturing pulley cover in continuously variable transmission5 May 2015US 9,021,851 B2G-Tekt Corporation
- Apparatus for spin-forming a circular body from a flat blank metal workpiece17 Dec 2020US 2020/0391270 A1
- Pulley with Line Guides16 Apr 2020US 2020/0115203 A1Hall Labs LLC
- Method for manufacturing a single chainring5 Jul 2018US 2018/0187766 A1Sr Suntour Inc.
- Plunger member used for belt type continuously variable transmission21 Jun 2018US 2018/0172034 A1Nippon Steel & Sumitomo Metal Corporation
- Welded idler and manufacturing method thereof24 May 2018US 2018/0141104 A1Dongxing Auto Parts Co.
Most cited
By later US patents
- Means for making double groove pulleys55US 3,953,995 A1976
- Method of making poly-V pulleys and product48US 3,977,264 AAspro, Inc. · 1976
- Multi V-grooved pulley structure and method of making same42US 4,050,321 AAspro, Inc. · 1977
- Method and apparatus for making a sheet metal pulley36US 3,945,102 A1976
- Method of pulley manufacture and product32US 4,273,547 ADrive Manufacturing Inc. · 1981