E21D 9/04
Driving tunnels or galleries through loose materials
Official title: Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for {(E21D9/005, E21D9/06 take precedence; soil improvement E21D9/001; provisional protective covers E21D19/04)}
E21D9/04 (Driving tunnels or galleries through loose materials) appears on 26 US grants and 16 published applications in this corpus.
Search patents in E21D- Granted patents
- 26
- Published applications
- 16
- Assignees
- 26
- Inventors
- 95
- Latest grant
- 29 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 2 |
| 2002 | 2 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 2 | 1 |
| 2018 | 0 | 0 |
| 2019 | 2 | 4 |
| 2020 | 0 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- 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
- Mechanical tunneling apparatus and process for tunnel in quicksand stratum7 May 2024US 11,976,558 B2Shandong University
- Tunnel boring device and system for the hydraulic removal of cuttings, and system for producing a stable fluid pressure for a boring fluid in the region of a cutting disk of the tunnel boring device14 Sep 2021US 11,118,454 B2Herrenknecht AG
- Method for deformation control of large-span tunnel in chlorite schist stratum7 May 2019US 10,280,749 B2Chang'an Univeristy
- Artificial ground freezing method and artificial ground freezing system5 Mar 2019US 10,221,537 B2Chemical Grouting Co., Ltd.
- Rotary digging drill and amphibious tunnel construction robot using same3 Apr 2025US 2025/0109689 A1Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
- Mechanical tunneling apparatus and process for tunnel in quicksand stratum28 Dec 2023US 2023/0417139 A1Shandong University
- Novel tunnel forming shanks and methods of using4 Nov 2021US 2021/0340871 A1Seamless AG Works LLC
- Precast Concrete Panels Used as Surface Lining of Perimeter Surfaces of Excavations10 Oct 2019US 2019/0309497 A1
- Method for Deformation Control of Large-span Tunnel in Chlorite Schist Stratum7 Mar 2019US 2019/0071968 A1Chang An University
Most cited
By later US patents
- Golf club shaft and set of golf clubs73US 4,165,874 APepsiCo, Inc. · 1979
- Shield type hydraulic tunnel boring machine18US 4,152,027 ATekken Construction Co., Ltd. · 1979
- Tunnelling and lining machine11US 3,972,200 A1976
- Method and a device for drilling with several tools in simultaneous operation11US 4,079,795 AMaschinen- und Bohrgerate-Fabrik Alfred Wirth & Co., K.G. · 1978
- Method and apparatus for transporting and housing tunnel workers active in high pressure environments10US 4,196,656 ATaylor Diving & Salvage Co., Inc. · 1980