Piston for a medical injection device

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Description

1. Piston for a medical injection device

1.1 : Perspective View

1.2 : Front View

1.3 : Back View

1.4 : Left View

1.5 : Right View

1.6 : Top View

1.7 : Bottom View

1.8 : Perspective View In Condition Of Use

The broken lines in the reproductions depict environmental structure of the piston for a medical injection device that form no part of the claimed design.

Claims

The ornamental design for a piston for a medical injection device, as shown and described.

Referenced Cited
U.S. Patent Documents
5947929 September 7, 1999 Trull
D621930 August 17, 2010 Maxa
D689188 September 3, 2013 Lundquist
9480797 November 1, 2016 Swantner
D787667 May 23, 2017 Iwase
D935608 November 9, 2021 Pfrang
D950720 May 3, 2022 Prais
D995769 August 15, 2023 Yamanaka
D1010115 January 2, 2024 Yamanaka
D1046128 October 8, 2024 Fremon
D1053349 December 3, 2024 Yamamoto
D1092772 September 9, 2025 Shah
20250332347 October 30, 2025 Grygus
Foreign Patent Documents
2013018975 February 2014 JP
3020230044432 October 2024 KR
F 2020 0296 December 2020 RO
DM/238599 March 2025 WO
Other references
  • “Nordson: How to Set Up Blue LV Barrier Pistons for Cyanoacrylates and Watery Fluids.” Found online Feb. 4, 2026 at nordson.com. Reference dated Sep. 25, 2019. Retrieved from https://www.nordson.com/en/about-us/nordson-blog/efd-blogs/092519-how-to-set-up-blue-lv-barrier-pistons-for-cyanoacrylates-and-watery-fluids.
  • “MDPI: A Promising Needle-Free Pyro-Drive Jet Injector . . . . ” Found online Feb. 4, 2026 at mdpi.com. Reference dated May 22, 2023. Retrieved from https://www.mdpi.com/1422-0067/24/10/9094.
  • “Qosina: Needless Injection Sites.” Found online Feb. 4, 2026 at qosina.com. Reference dated Sep. 15, 2024. Retrieved from /https://www.qosina.com/categories/injection-sampling-ports/needleless-injection-sites.
  • “MIT News: Device may inject a variety of drugs without using needles.” Found online Feb. 4, 2026 at news.mit.edu. Reference dated May 24, 2012. Retrieved from https://news.mit.edu/2012/needleless-injections-0524.
Patent History
Patent number: D1146021
Type: Grant
Filed: Mar 6, 2024
Date of Patent: Sep 1, 2026
Inventors: Seung Hoon Choi (Pohang-si), Sang Hyun Chung (Cheongju-si)
Primary Examiner: Kendra Leslie Hamilton
Assistant Examiner: Elizabeth S Struble
Application Number: 35/524,216
Classifications
Current U.S. Class: Syringe, Catheter Or Needle Component (22) (D24/130)