A61M 5/31513
Piston constructions to improve sealing or sliding
Official title: {Piston constructions to improve sealing or sliding}
A61M5/31513 (Piston constructions to improve sealing or sliding) appears on 675 US grants and 915 published applications in this corpus.
Search patents in A61M- Granted patents
- 675
- Published applications
- 915
- Assignees
- 319
- Inventors
- 1,428
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 8 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 7 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 8 | 0 |
| 1999 | 9 | 0 |
| 2000 | 11 | 0 |
| 2001 | 7 | 5 |
| 2002 | 4 | 7 |
| 2003 | 10 | 12 |
| 2004 | 4 | 11 |
| 2005 | 1 | 9 |
| 2006 | 6 | 11 |
| 2007 | 7 | 16 |
| 2008 | 3 | 12 |
| 2009 | 5 | 22 |
| 2010 | 14 | 15 |
| 2011 | 8 | 27 |
| 2012 | 8 | 25 |
| 2013 | 16 | 25 |
| 2014 | 24 | 46 |
| 2015 | 24 | 47 |
| 2016 | 25 | 53 |
| 2017 | 42 | 49 |
| 2018 | 30 | 59 |
| 2019 | 53 | 53 |
| 2020 | 48 | 68 |
| 2021 | 42 | 69 |
| 2022 | 47 | 53 |
| 2023 | 47 | 65 |
| 2024 | 57 | 72 |
| 2025 | 37 | 54 |
| 2026 | 19 | 30 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Syringe assembly including pressurized sterile air6 Oct 2026US 12,752,057 B2
- Ball joint-style, non-fixed coupling between a pusher plate and plunger in a syringe barrel15 Sep 2026US 12,734,292 B2Becton, Dickinson and Company
- Multistage gas-actuated drug supply device and method thereof25 Aug 2026US 12,714,792 B2MicroMED Co., Ltd.
- Multi-chamber syringe11 Aug 2026US 12,702,757 B2Davol Inc.
- Syringe and related methods28 Jul 2026US 12,690,946 B1
- Multimode nasal medication injector and methods related thereto8 Oct 2026US 2026/0306765 A1Flxion Medical, Inc.
- Vacuum insertion methods for inserting lubricant free syringe stoppers and a system for assembling same27 Aug 2026US 2026/0249014 A1W. L. Gore & Associates, Inc.
- Plunger rod and plunger rod adapter for pistons20 Aug 2026US 2026/0241108 A1West Pharmaceutical Services, Inc.
- Hydrogel delivery actuators with dual-axis needle positioning13 Aug 2026US 2026/0232924 A1Boston Scientific Medical Device Limited
- Medical or pharmaceutical stopper for sealing a container volume and method for manufacturing the same30 Jul 2026US 2026/0216440 A1
Most cited
By later US patents
- Infusion pump system with disposable cartridge having pressure venting and pressure feedback253US 8,287,495 B2Tandem Diabetes Care, Inc. · 2012
- Method of intradermally injecting substances244US 6,569,143 B2Becton, Dickinson and Company · 2003
- Hypodermic syringe assembly223US 4,869,720 AE-Z-EM, Inc. · 1989
- Needle-less injector222US 5,891,086 AWeston Medical Limited · 1999
- Sealing stopper for a syringe and a prefilled syringe209US 6,090,081 ADaikyo Seiko, Ltd. · 2000