B61L 5/04
Fluid-pressure devices for operating points or scotch-blocks
B61L5/04 (Fluid-pressure devices for operating points or scotch-blocks) appears on 34 US grants and 23 published applications in this corpus.
Search patents in B61L- Granted patents
- 34
- Published applications
- 23
- Assignees
- 22
- Inventors
- 55
- Latest grant
- 11 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 2 |
| 2005 | 1 | 2 |
| 2006 | 0 | 0 |
| 2007 | 2 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 3 |
| 2015 | 1 | 1 |
| 2016 | 3 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 2 |
| 2020 | 2 | 2 |
| 2021 | 0 | 3 |
| 2022 | 2 | 1 |
| 2023 | 1 | 1 |
| 2024 | 3 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Railroad switch device for moving railroad switch points11 Feb 2025US 12,221,144 B2
- Turnout apparatus for overhead monorail1 Oct 2024US 12,104,328 B2Taiyuan University of Technology
- Saborage-resistant switch device for moving railroad switch points1 Oct 2024US 12,104,331 B2
- High-speed railway switch device for moving railroad switch points17 Sep 2024US 12,091,071 B2
- Railroad switch device10 Oct 2023US 11,780,478 B1
- Railroad switch device2 Nov 2023US 2023/0347947 A1Advanced Rail Systems, LLC
- Railroad switch device for moving railroad switch points7 Apr 2022US 2022/0105970 A1
- Turnout apparatus for overhead monorail16 Dec 2021US 2021/0388562 A1Taiyuan University of Technology
- Railway switch device for moving railroad switch points6 May 2021US 2021/0129876 A1
- Saborage-resistant switch device for moving railroad switch points28 Jan 2021US 2021/0025115 A1
Most cited
By later US patents
- Operating device for railway switches, particularly for high-speed lines21US 5,292,091 ASasib S.p.A. · 1994
- Railroad switch stand20US 5,531,408 AChemetron-Railway Products, Inc. · 1996
- Railroad switch machine18US 4,428,552 AAbex Corporation · 1984
- Hydraulic switch stand with rail pump charging and hydraulic lock14US 5,417,392 A1995
- Fluidically operated railway switch machine12US 4,213,588 AWestinghouse Brake & Signal Co. Ltd. · 1980