B23P 19/045
For assembling valve cotters and retainers of engine valves
Official title: {for assembling valve cotters and retainers of engine valves}
B23P19/045 (For assembling valve cotters and retainers of engine valves) appears on 35 US grants and 20 published applications in this corpus.
Search patents in B23P- Granted patents
- 35
- Published applications
- 20
- Assignees
- 21
- Inventors
- 63
- Latest grant
- 13 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 1 | 1 |
| 2014 | 3 | 2 |
| 2015 | 1 | 1 |
| 2016 | 3 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 2 |
| 2019 | 0 | 0 |
| 2020 | 2 | 1 |
| 2021 | 2 | 4 |
| 2022 | 3 | 3 |
| 2023 | 1 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Moving blade removing device and moving blade removal method13 May 2025US 12,296,418 B2Mitsubishi Heavy Industries, Ltd.
- Retainer gripping device15 Oct 2024US 12,115,607 B2Shinmei Industry Co., Ltd.
- Engine cylinder valve spring keeper installation system1 Aug 2023US 11,712,768 B1R.P. Gatta, Inc
- Assembling apparatus and assembling method8 Mar 2022US 11,267,089 B2Hirata Corporation
- Assembling apparatus and assembling method8 Feb 2022US 11,241,763 B2Hirata Corporation
- Moving blade removing device and moving blade removal method20 Jun 2024US 2024/0198465 A1Mitsubishi Heavy Industries, Ltd.
- Assembling apparatus and assembling method26 May 2022US 2022/0161377 A1Hirata Corporation
- Assembling apparatus, assembling head, and assembling method21 Apr 2022US 2022/0118565 A1Hirata Corporation
- Assembling apparatus and assembling method21 Apr 2022US 2022/0118566 A1Hirata Corporation
- Retainer gripping device30 Dec 2021US 2021/0402617 A1Shinmei Industry Co., Ltd.
Most cited
By later US patents
- Vacuum tool for installing valve spring retainer and keys29US 5,761,785 AABB Flexible Automation, Inc. · 1998
- Self-locking valve spring retainer22US 5,143,351 A1992
- Method and device for placing or removing valve-spring retainer locks15US 5,915,740 A1999
- Valve stem assembly14US 5,072,950 ASeal Technology Systems · 1991
- Automatic device for the putting in place of valves13US 5,097,579 AConstructions Mecaniques de la Guide · 1992