E21C 35/197
Using sleeves, rings or the like, as main fixing elements
Official title: using sleeves, rings or the like, as main fixing elements
E21C35/197 (Using sleeves, rings or the like, as main fixing elements) appears on 261 US grants and 202 published applications in this corpus.
Search patents in E21C- Granted patents
- 261
- Published applications
- 202
- Assignees
- 70
- Inventors
- 238
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 7 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 6 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 7 | 0 |
| 2001 | 2 | 0 |
| 2002 | 8 | 8 |
| 2003 | 6 | 4 |
| 2004 | 5 | 3 |
| 2005 | 6 | 4 |
| 2006 | 6 | 11 |
| 2007 | 8 | 6 |
| 2008 | 8 | 25 |
| 2009 | 7 | 14 |
| 2010 | 7 | 7 |
| 2011 | 16 | 10 |
| 2012 | 5 | 10 |
| 2013 | 13 | 4 |
| 2014 | 4 | 6 |
| 2015 | 6 | 11 |
| 2016 | 7 | 11 |
| 2017 | 7 | 11 |
| 2018 | 10 | 12 |
| 2019 | 10 | 6 |
| 2020 | 13 | 4 |
| 2021 | 11 | 6 |
| 2022 | 6 | 5 |
| 2023 | 5 | 7 |
| 2024 | 3 | 6 |
| 2025 | 4 | 5 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Non-rotating bit for cutting tool22 Sep 2026US 12,741,396 B2Caterpillar Paving Products Inc.
- Block for holding a cutting bit21 Jul 2026US 12,687,111 B2Kennametal Inc.
- Long tapered retainer groove road planing body24 Feb 2026US 12,560,086 B2Kennametal Inc.
- Tool retainer17 Feb 2026US 12,553,343 B2Kennametal Inc.
- Protected spring clip for retaining bits2 Dec 2025US 12,486,638 B2Caterpillar Inc.
- Long Tapered Retainer Groove Road Planing Body11 Jun 2026US 2026/0160164 A1Kennametal Inc.
- Non-rotating bit for cutting tool30 Apr 2026US 2026/0115967 A1Caterpillar Paving Products Inc.
- Retainer for a rotating bit16 Apr 2026US 2026/0103980 A1The Sollami Company
- Cutter assembly and cutting tool structure5 Mar 2026US 2026/0061504 A1Everpads Co., Ltd.
- Tapered bushing for bit removal19 Feb 2026US 2026/0049459 A1Caterpillar Inc.
Most cited
By later US patents
- Embossed washer182US 6,824,225 B2Kennametal Inc. · 2004
- Mining machine bit and mounting thereof178US 4,201,421 A1980
- Protective wear sleeve having tapered lock and retainer172US 6,786,557 B2Kennametal Inc. · 2004
- Bit holders and bit blocks for road milling, mining and trenching equipment163US 6,371,567 B1The Sollami Company · 2002
- T-shaped cutter tool assembly with wear sleeve162US 6,854,810 B2Kennametal Inc. · 2005