F16L 55/26
Pigs or moles, i.e. devices movable in a pipe or conduit with
Official title: Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
F16L55/26 (Pigs or moles, i.e. devices movable in a pipe or conduit with) appears on 1,362 US grants and 1,337 published applications in this corpus.
Search patents in F16L- Granted patents
- 1,362
- Published applications
- 1,337
- Assignees
- 772
- Inventors
- 2,831
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 7 | 0 |
| 1984 | 9 | 0 |
| 1985 | 7 | 0 |
| 1986 | 8 | 0 |
| 1987 | 13 | 0 |
| 1988 | 12 | 0 |
| 1989 | 8 | 0 |
| 1990 | 11 | 0 |
| 1991 | 20 | 0 |
| 1992 | 24 | 0 |
| 1993 | 16 | 0 |
| 1994 | 19 | 0 |
| 1995 | 12 | 0 |
| 1996 | 18 | 0 |
| 1997 | 21 | 0 |
| 1998 | 12 | 0 |
| 1999 | 26 | 0 |
| 2000 | 27 | 0 |
| 2001 | 13 | 6 |
| 2002 | 24 | 22 |
| 2003 | 14 | 24 |
| 2004 | 27 | 26 |
| 2005 | 20 | 28 |
| 2006 | 15 | 29 |
| 2007 | 20 | 25 |
| 2008 | 18 | 30 |
| 2009 | 20 | 34 |
| 2010 | 16 | 30 |
| 2011 | 22 | 35 |
| 2012 | 22 | 36 |
| 2013 | 23 | 36 |
| 2014 | 34 | 54 |
| 2015 | 40 | 38 |
| 2016 | 41 | 60 |
| 2017 | 45 | 45 |
| 2018 | 42 | 86 |
| 2019 | 68 | 82 |
| 2020 | 75 | 102 |
| 2021 | 76 | 98 |
| 2022 | 65 | 97 |
| 2023 | 95 | 83 |
| 2024 | 91 | 89 |
| 2025 | 83 | 97 |
| 2026 | 54 | 45 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and tool for inspecting the condition of the internal surface of pipes6 Oct 2026US 12,753,874 B2Petroleo Brasileiro S.A. - Petrobras
- High temperature resistant, jacketed foreign material exclusion device29 Sep 2026US 12,747,821 B2Advanced F.M.E. Products, Inc.
- Pipe inspection camera system15 Sep 2026US 12,736,169 B2Shenzhen Andelian Technology Co., Ltd.
- Devices for performing maintenance in a pipeline and methods for driving the devices toward a launch port1 Sep 2026US 12,723,698 B1Weldfit LLC
- Method and apparatus for cleaning and inspecting oil well drilling mud flow lines25 Aug 2026US 12,715,025 B1Tri-State Environmental, LLC
- In-line detector for geometric deformation of non-metallic pipeline with automatic jam release function24 Sep 2026US 2026/0287320 A1Changzhou University
- Intelligent suction-type underground drainage pipeline sediment removal robot and sediment removal method17 Sep 2026US 2026/0273592 A1Zhengzhou University
- Method and internet of things system for liquid accumulation supervision in smart gas pipelines17 Sep 2026US 2026/0276159 A1Chengdu Qinchuan Iot Technology Co., Ltd.
- Robot for trenchless pipeline and manhole rehabilitation3 Sep 2026US 2026/0258897 A1
- Tool and method for inspection of pipes using two wave modes generated by an emat3 Sep 2026US 2026/0258898 A1Petroleo Brasileiro S.A. - Petrobras
Most cited
By later US patents
- Pipe inspection and repair system204US 6,820,653 B1Carnegie Mellon University · 2004
- Modular observation crawler and sensing instrument and method for operating same200US 6,450,104 B1North Carolina State University · 2002
- Self-powered pipeline vehicle for carrying out an operation on a pipeline and method186US 6,031,371 ABG plc · 2000
- Gas main robotic inspection system178US 6,917,176 B2Carnegie Mellon University · 2005
- Robotic inspection apparatus and method170US 5,857,534 AKansas State University Research Foundation · 1999