E01B 31/22
Cutting or grinding wooden sleepers
Official title: Cutting or grinding wooden sleepers, e.g. for forming rail seats (E01B31/24 takes precedence)
E01B31/22 (Cutting or grinding wooden sleepers) appears on 8 US grants and 3 published applications in this corpus.
Search patents in E01B- Granted patents
- 8
- Published applications
- 3
- Assignees
- 7
- Inventors
- 12
- Latest grant
- 2 Feb 2016
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Adzer machine having failsafe head assembly2 Feb 2016US 9,249,542 B2Progress Rail Services Corporation
- Adzer skid assembly and method of use1 Oct 2013US 8,544,509 B2Knox Kershaw, Inc.
- Adzer mount assembly21 Feb 2006US 7,000,659 B1Knox Kershaw, Inc.
- Adzer cribber18 Jul 1989US 4,848,426 AKershaw Manufacturing Company, Inc.
- Railroad adzer debris removal means2 May 1989US 4,825,919 AOak Industries Inc.
- Adzer machine having a head assembly with a cylindrical drum27 Nov 2025US 2025/0361682 A1Progress Rail Services Corporation
- Adzer machine having failsafe head assembly5 Feb 2015US 2015/0033975 A1Progress Rail Services Corporation
- Adzer skid assembly and method of use28 Apr 2011US 2011/0094624 A1Knox Kershaw, Inc.
Most cited
By later US patents
- Apparatus for the replacement of rails of a track13US 4,301,738 AFranz Plasser Bahnbaumaschinen-Industriegesellschaft m. b. H. · 1981
- Machine for changing rails8US 4,274,334 ACanron, Inc. · 1981
- Adzer cribber4US 4,848,426 AKershaw Manufacturing Company, Inc. · 1989
- Tie adz2US 4,327,785 ARacine Railroad Products, Inc. · 1982
- Adzer mount assembly2US 7,000,659 B1Knox Kershaw, Inc. · 2006