E21D 7/02
Arrangement of guides for cages in shafts
Official title: Arrangement of guides for cages in shafts; Connection of guides for cages to shaft walls (guideways or guides for elevators B66B7/02)
E21D7/02 (Arrangement of guides for cages in shafts) appears on 20 US grants and 13 published applications in this corpus.
Search patents in E21D- Granted patents
- 20
- Published applications
- 13
- Assignees
- 17
- Inventors
- 55
- Latest grant
- 3 Jan 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 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 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 4 |
| 2017 | 2 | 2 |
| 2018 | 3 | 0 |
| 2019 | 2 | 2 |
| 2020 | 0 | 2 |
| 2021 | 3 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Two-piece guide bushing3 Jan 2023US 11,543,041 B2Halliburton Energy Services.Inc.
- Cageway connecting device and connecting method thereof14 Dec 2021US 11,199,091 B2Hefei Design & Research Inst. Of Coal Industry Co., LTD.
- Method for fixing a rail bracket of an elevator system, and elevator system30 Nov 2021US 11,186,464 B2Inventio AG
- Apparatus and method for sinking concrete shaft3 Aug 2021US 11,078,788 B1Ician Engineering Contractors Co., Ltd.
- Inspection apparatus and method for patrol-inspection of rigid cage channel10 Dec 2019US 10,501,132 B2China University of Mining and Technology
- Cageway connecting device and connecting method thereof23 Jul 2020US 2020/0232321 A1Hefei Desigh and Research Institute of Coal Industry Co., Ltd.
- Two-piece guide bushing6 Feb 2020US 2020/0041014 A1Halliburton Energy Services.Inc.
- Method for fixing a rail bracket of an elevator system, and elevator system5 Dec 2019US 2019/0367328 A1Inventio AG
- Device and method for periodically inspecting rigid guide25 Jul 2019US 2019/0225287 A1China University of Mining and Technology
- A horizontally movable vertical shaft rope guide and regulating method thereof26 Oct 2017US 2017/0305722 A1China University of Mining and Technology
Most cited
By later US patents
- Elevator rail mounting bracket18US 3,948,358 ADover Corporation · 1976
- Mine shaft guide system12US 4,601,607 ALake Shore, Inc. · 1986
- Clamping means for elevator guide rails and the like10US 3,982,692 AR. Stahl Aufzuege GmbH · 1976
- Method and apparatus for developing shafts using small diameter shafts8US 5,513,903 ADeep Shaft Technology Inc. · 1996
- Shaft guide alignment measurement7US 4,627,170 AVaal Reefs Exploration and Mining Company Limited · 1986