B21K 1/063
Hollow
Official title: {hollow (hollow racks B21K1/768)}
B21K1/063 (Hollow) appears on 97 US grants and 91 published applications in this corpus.
Search patents in B21K- Granted patents
- 97
- Published applications
- 91
- Assignees
- 77
- Inventors
- 208
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 2 | 3 |
| 2002 | 2 | 1 |
| 2003 | 4 | 6 |
| 2004 | 3 | 5 |
| 2005 | 4 | 4 |
| 2006 | 1 | 4 |
| 2007 | 1 | 4 |
| 2008 | 0 | 4 |
| 2009 | 2 | 3 |
| 2010 | 1 | 1 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 2 | 1 |
| 2014 | 0 | 2 |
| 2015 | 0 | 7 |
| 2016 | 4 | 4 |
| 2017 | 2 | 6 |
| 2018 | 5 | 8 |
| 2019 | 1 | 4 |
| 2020 | 8 | 5 |
| 2021 | 5 | 7 |
| 2022 | 5 | 7 |
| 2023 | 6 | 0 |
| 2024 | 3 | 3 |
| 2025 | 2 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hollow wind turbine main shaft and profiling forging process and use thereof25 Aug 2026US 12,716,108 B2Zenkung Heavy Industry (Jiangsu) Co., Ltd.
- Device and method for continuously producing an at least partly hollow shaft having a varying inner and/or outer diameter23 Dec 2025US 12,502,705 B2MAGNA Powertrain AG & Co KG
- Steel material for a torsionally stressed component, method for producing a torsionally stressed component from said steel material, and component made thereof30 Sep 2025US 12,428,693 B2Mannesmann Precision Tubes GmbH
- Drive shaft and method of producing drive shaft23 Apr 2024US 11,965,548 B2Honda Motor Co., Ltd.
- Hollow shaft member and rolling device16 Apr 2024US 11,959,516 B2Thk Co., Ltd.
- Method and mechanical arrangement for producing a tubular hollow body from a tubular hollow body blank, in particular for producing a hollow shaft from a shaft blank13 Aug 2026US 2026/0233293 A1FELSS Systems GmbH
- Hollow wind turbine main shaft and profiling forging process and use thereof30 Apr 2026US 2026/0117334 A1Zenkung Heavy Industry (Jiangsu) Co., Ltd.
- Radial forging for the manufacture of ball screw actuator shafts12 Sep 2024US 2024/0300005 A1The Boeing Company
- Compound profiling forging method for large wind turbine main shaft29 Aug 2024US 2024/0286186 A1Zenkung Heavy Industry (Jiangsu) Co., Ltd.
- Device and method for continuously producing an at least partly hollow shaft having a varying inner and/or outer diameter6 Jun 2024US 2024/0181515 A1MAGNA Powertrain AG & Co KG
Most cited
By later US patents
- Flexible shaft and method for manufacturing same91US 5,488,761 A1996
- Method for forming a lightweight flanged axle shaft35US 5,213,250 A1993
- Method of internally and externally upsetting the end of a metal tube34US 5,184,495 APrideco, Inc. · 1993
- Method for producing a propeller shaft32US 5,771,737 AMatsui Universal Joint Manufacturing Company · 1998
- Process for forming light-weight tublar axles25US 5,522,246 AU.S. Manufacturing Corporation · 1996