E21D 9/1086
Drives or transmissions specially adapted therefor
Official title: {Drives or transmissions specially adapted therefor}
E21D9/1086 (Drives or transmissions specially adapted therefor) appears on 28 US grants and 15 published applications in this corpus.
Search patents in E21D- Granted patents
- 28
- Published applications
- 15
- Assignees
- 20
- Inventors
- 82
- Latest grant
- 12 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 3 |
| 2019 | 0 | 2 |
| 2020 | 3 | 3 |
| 2021 | 2 | 2 |
| 2022 | 1 | 1 |
| 2023 | 3 | 1 |
| 2024 | 0 | 0 |
| 2025 | 2 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rock-piercing flexible rock drilling robot and rock breaking method12 Aug 2025US 12,385,391 B2Central South University
- Rotary digging drill and amphibious tunnel construction robot using same29 Apr 2025US 12,286,884 B2Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
- Rock cutting device19 Dec 2023US 11,846,190 B2Joy Global Underground Mining LLC
- Temperature control device for drive and/or transmission units such as tunnel borer transmissions21 Nov 2023US 11,821,508 B2Liebherr-Components Biberach GmbH
- Machine supporting rock cutting device7 Mar 2023US 11,598,208 B2Joy Global Underground Mining LLC
- Excited-vibration disc-cutting rock-breaking device of front eccentric block3 Sep 2026US 2026/0258726 A1Taiyuan University of Science and Technology
- Rotary digging drill and amphibious tunnel construction robot using same3 Apr 2025US 2025/0109689 A1Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
- Rock-piercing flexible rock drilling robot and rock breaking method23 Feb 2023US 2023/0059714 A1Central South University
- Machine supporting rock cutting device17 Feb 2022US 2022/0049605 A1Joy Global Underground Mining LLC
- Temperature control device for drive and/or transmission units such as tunnel borer transmissions23 Dec 2021US 2021/0396137 A1Liebherr-Components Biberach GmbH
Most cited
By later US patents
- Tunnel boring machine26US 4,494,799 AHarrison Western Corporation · 1985
- Cutter unit assemblies for excavating machines and to excavating machines including cutter unit assemblies17US 4,302,054 ACoal Industry (Patents) Limited · 1981
- Reciprocably supported dual drive member and features thereof12US 4,332,420 A1982
- Tunnel excavator with variable pressure water jets11US 6,332,652 B1Nakakuro Construction Co., Ltd. · 2001
- Driving arrangement for driving the cutting rolls of a drift advancing machine9US 4,786,112 AVoest-Alpine Aktiengesellschaft · 1988