Small unit dosage plunger rod stops
US11806513B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2021 |
| Grant date | Nov 7, 2023 |
| Priority date | — |
| Expiry date | Aug 18, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/31595
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Plunger rod stops attach to existing syringes to limit the range of motion of the plunger, thereby to precisely control the amount of liquid that can be expelled from the syringe when the plunger rod stop is in place. In some embodiments, plunger rod stop devices generally include a body configured to attach to the plunger, and a stand-off extending from the body, configured to contact the finger flange when the plunger is depressed. In other embodiments, the plunger rod stop attaches to the finger flange or other fixed component of the syringe and the stand-off is configured to contact the plunger or plunger rod. Methods of the invention involve using the devices to interfere with the range of motion of the plunger, then reconfiguring or removing the device to allow the plunger to be moved a predetermined length, which corresponds to a precise dosage amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.