Administration apparatus for medical use
US9149582B2 · kind B2 · utility
8Cited by
21References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2008 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Feb 6, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/583
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An expansion/compression mechanism of a piston rod assembly is composed of a bush shaft, a first cylindrical piston rod that is screwed with the bush shaft, a second cylindrical piston rod that is screwed with the first piston rod, and a piston rod holding member for housing the bush shaft and these piston rods. Therefore, the piston rods move linearly in multiple stages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.