F15B 15/1461
Piston rod sealings
Official title: {Piston rod sealings}
F15B15/1461 (Piston rod sealings) appears on 85 US grants and 119 published applications in this corpus.
Search patents in F15B- Granted patents
- 85
- Published applications
- 119
- Assignees
- 74
- Inventors
- 226
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 4 |
| 2009 | 1 | 1 |
| 2010 | 1 | 5 |
| 2011 | 0 | 2 |
| 2012 | 2 | 5 |
| 2013 | 1 | 1 |
| 2014 | 2 | 4 |
| 2015 | 0 | 11 |
| 2016 | 6 | 9 |
| 2017 | 4 | 11 |
| 2018 | 7 | 9 |
| 2019 | 13 | 14 |
| 2020 | 11 | 9 |
| 2021 | 8 | 4 |
| 2022 | 7 | 0 |
| 2023 | 2 | 9 |
| 2024 | 2 | 8 |
| 2025 | 13 | 5 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Sealing device and back-up ring25 Aug 2026US 12,716,494 B2Nok Corporation
- Performance testing device for piston rod sealing assembly16 Jun 2026US 12,656,220 B2Tsinghua University
- Stability and control augmentation system actuator10 Mar 2026US 12,570,393 B2Microtecnica S.R.L.
- Oil leak mitigation for hydraulic systems30 Dec 2025US 12,510,109 B2J. E. Myles, Inc. Control Power Division
- Pressure applying device25 Nov 2025US 12,480,536 B2Eagle Industry Co., Ltd.
- Leakage cause discrimination system and leakage cause discrimination method20 Aug 2026US 2026/0243281 A1KYB Corporation
- Retraction mechanism and dimension-measuring device provided with same16 Apr 2026US 2026/0104063 A1Tokyo Seimitsu Co., Ltd.
- Sealing member and sealing structure16 Apr 2026US 2026/0104094 A1Nok Corporation
- Cylinder device9 Apr 2026US 2026/0098549 A1Kosmek Ltd.
- Multi-stage, telescoping hydraulic cylinder, cylinder bearing protection system, and scraper for cylinder rod22 Jan 2026US 2026/0022715 A1Rosenboom Machine & Tool, Inc.
Most cited
By later US patents
- System for backup rod seal for hydraulic cylinder10US 7,607,383 B22009
- Pressure medium drive with a cylinder and a plunger5US 5,701,800 AKaup & Co. KG · 1997
- Gas compressor compressing well head casing gas4US 10,443,590 B12019
- Hydraulic pressure booster and method for the production of an axial compressive stress in a high-pressure cylinder4US 10,900,501 B2BFT SpA · 2021
- Hydraulic cylinder unit3US 7,762,177 B2Weber-Hydraulic GmbH · 2010