F15B 15/261
Using positive interengagement
Official title: {using positive interengagement, e.g. balls and grooves, for locking in the end positions}
F15B15/261 (Using positive interengagement) appears on 288 US grants and 191 published applications in this corpus.
Search patents in F15B- Granted patents
- 288
- Published applications
- 191
- Assignees
- 196
- Inventors
- 511
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 8 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 11 | 0 |
| 1985 | 8 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 2 |
| 2002 | 4 | 5 |
| 2003 | 8 | 4 |
| 2004 | 5 | 9 |
| 2005 | 1 | 2 |
| 2006 | 4 | 9 |
| 2007 | 9 | 4 |
| 2008 | 4 | 6 |
| 2009 | 2 | 6 |
| 2010 | 4 | 2 |
| 2011 | 1 | 1 |
| 2012 | 3 | 10 |
| 2013 | 2 | 8 |
| 2014 | 9 | 12 |
| 2015 | 13 | 15 |
| 2016 | 11 | 11 |
| 2017 | 12 | 15 |
| 2018 | 16 | 10 |
| 2019 | 12 | 10 |
| 2020 | 15 | 12 |
| 2021 | 3 | 7 |
| 2022 | 7 | 7 |
| 2023 | 7 | 11 |
| 2024 | 15 | 6 |
| 2025 | 8 | 3 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Actuator2 Jun 2026US 12,644,477 B2The Boeing Company
- Linear actuator19 May 2026US 12,630,285 B2Goodrich Actuation Systems Limited
- Lock mechanism for telescopic hold open rod7 Apr 2026US 12,595,069 B2Hamilton Sundstrand Corporation
- Locking unit with pilot valve30 Dec 2025US 12,510,153 B2
- Fluid power actuator utilizing a screw assembly21 Oct 2025US 12,449,216 B2Textron Systems Corporation
- Multi-functioning locking mechanism of a hold open rod20 Aug 2026US 2026/0243280 A1MarathonNorco Aerospace, Inc.
- Quick release scotch yoke actuator6 Aug 2026US 2026/0226885 A1Bray International, Inc.
- Hydraulic actuator6 Aug 2026US 2026/0226922 A1Svm Schultz Verwaltungs-GmbH & Co.KG
- Locking sleeve for an actuator15 Jan 2026US 2026/0016028 A1Liebherr-Aerospace Lindenberg GmbH
- Linear actuator25 Sep 2025US 2025/0296677 A1Goodrich Actuation Systems Limited
Most cited
By later US patents
- Fusible member connection apparatus and method100US 5,695,306 ALockheed Martin Corporation · 1997
- Variable valve timing control system80US 6,330,870 B1Denso Corporation · 2001
- Actuator with automatic lock47US 5,025,708 ABaroid Technology, Inc. · 1991
- Self-adjusting automatic locking piston for RAM blowout preventers45US 5,056,418 A1991
- Rod locking device34US 4,969,390 ACooper Industries, Inc. · 1990