Needleless injection device components, systems, and methods
US8945045B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2010 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Apr 18, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2210/1078
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A needleless fluid injection system include a working shaft (14) with a proximal end and a distal end, an injection shaft with a proximal end and a distal end, and a tissue tensioning mechanism (40) positioned at the distal end of at least one of the working shaft and the injection shaft. Embodiments of the tissue tensioning mechanism can include one or more of multiple radially expanding arcuate members (44), a linearly compressible element (60) with first and second plates at opposite ends of the linearly compressible element, an arcuate member (70) having a first end engaged within the lumen of the injection shaft and a second end moveable relative to the first end, first and second wedges (90a, b) that are slideable relative to each other, an inflatable bladder (110) with a foam material within a body opening of the bladder, at least two electromagnetic coils (146,148), or an electroactive polymer portion (166).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.