B21B 31/074
Oil film bearings
Official title: {Oil film bearings, e.g. "Morgoil" bearings}
B21B31/074 (Oil film bearings) appears on 74 US grants and 54 published applications in this corpus.
Search patents in B21B- Granted patents
- 74
- Published applications
- 54
- Assignees
- 25
- Inventors
- 77
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 3 |
| 2003 | 3 | 0 |
| 2004 | 1 | 3 |
| 2005 | 1 | 1 |
| 2006 | 1 | 2 |
| 2007 | 0 | 5 |
| 2008 | 4 | 3 |
| 2009 | 1 | 4 |
| 2010 | 4 | 3 |
| 2011 | 3 | 5 |
| 2012 | 3 | 1 |
| 2013 | 4 | 3 |
| 2014 | 1 | 1 |
| 2015 | 5 | 4 |
| 2016 | 1 | 1 |
| 2017 | 0 | 1 |
| 2018 | 1 | 4 |
| 2019 | 1 | 2 |
| 2020 | 2 | 2 |
| 2021 | 3 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 2 |
| 2025 | 1 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Monitoring system for monitoring parameters representative of operating conditions of an oil film bearing3 Mar 2026US 12,566,106 B2Danieli & C. Officine Meccaniche SpA
- Roll stand21 Jan 2025US 12,203,503 B2SMS group GmbH
- Seal to prevent lubricant escaping, and rolling stand having said seal8 Aug 2023US 11,717,869 B2SMS group GmbH
- Roll stand15 Mar 2022US 11,273,477 B2SMS group GmbH
- Volume flow regulating valve13 Apr 2021US 10,974,296 B2SMS group GmbH
- Bearing temperature reduction through bushing modification12 Mar 2026US 2026/0071648 A1Primetals Technologies USA LLC
- Bearing temperature reduction through sleeve modification14 Aug 2025US 2025/0256316 A1Primetals Technologies USA LLC
- Journal bush as part of an oil film bearing1 Aug 2024US 2024/0255021 A1SMS group GmbH
- A monitoring system for monitoring parameters representative of operating conditions of an oil film bearing14 Mar 2024US 2024/0085272 A1Danieli & C. Officine Meccaniche SpA
- Roll stand20 Jul 2023US 2023/0228295 A1SMS group GmbH
Most cited
By later US patents
- Hydrodynamic seal44US 4,770,548 AThe Timken Company · 1988
- Compact seal41US 4,799,808 AThe Timken Company · 1989
- Hydraulically actuated tool for mounting and dismounting rolling mill roll neck bearings34US 6,415,489 B1Morgan Construction Company · 2002
- Compact labyrinth-type seal31US 4,770,424 AThe Timken Company · 1988
- Shielded seal assembly29US 4,819,949 AThe Timken Company · 1989