B21K 1/08
Crankshafts
Official title: crankshafts
B21K1/08 (Crankshafts) appears on 83 US grants and 71 published applications in this corpus.
Search patents in B21K- Granted patents
- 83
- Published applications
- 71
- Assignees
- 46
- Inventors
- 169
- Latest grant
- 2 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 0 |
| 2002 | 0 | 0 |
| 2003 | 2 | 1 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 1 | 6 |
| 2011 | 0 | 4 |
| 2012 | 1 | 1 |
| 2013 | 3 | 1 |
| 2014 | 6 | 4 |
| 2015 | 2 | 9 |
| 2016 | 1 | 4 |
| 2017 | 6 | 8 |
| 2018 | 9 | 10 |
| 2019 | 10 | 6 |
| 2020 | 6 | 8 |
| 2021 | 5 | 3 |
| 2022 | 2 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Crankshaft and method of manufacturing forged material for crankshaft2 Sep 2025US 12,403,526 B2Nippon Steel Corporation
- Method and apparatus for manufacturing a forged component25 Apr 2023US 11,633,779 B2Hyundai Motor Company
- Device for calibrating and lightening the weight of crankshafts26 Apr 2022US 11,311,929 B2Cie Automotive, S.A.
- Method for producing forged crankshaft22 Feb 2022US 11,253,910 B2Nippon Steel Corporation
- Method and device for the impact treatment of transition radii of a crankshaft21 Dec 2021US 11,203,056 B2Maschinenfabrik Alfing Kessler GmbH
- Crankshaft and method of manufacturing forged material for crankshaft21 Mar 2024US 2024/0091847 A1Nippon Steel Corporation
- Method for producing forged crankshaft24 Jun 2021US 2021/0187591 A1Nippon Steel Corporation
- Method and device for the impact treatment of transition radii of a crankshaft13 May 2021US 2021/0138532 A1Maschinenfabrik Alfing Kessler GmbH
- Method and apparatus for manufacturing a forged component1 Apr 2021US 2021/0094088 A1Hyundai Motor Company
- Method for producing forged crankshaft19 Nov 2020US 2020/0360984 A1Nippon Steel Corporation
Most cited
By later US patents
- Forging of a camshaft88US 4,317,355 ADiesel Kiki Co., Ltd. · 1982
- Method and devices for forging single crank throws of semi-built up crankshafts29US 4,041,755 AInstytut Obrobki Plastycznej · 1977
- Pulsing impact straightener22US 4,416,130 AIndustrial Metal Products Corporation · 1983
- Method for forming a crankshaft11US 5,115,663 AHonda Giken Kogyo Kabushiki Kaisha · 1992
- Method for integrally manufacturing an one-piece forged hollow crank of a bicycle11US 6,266,990 B12001