Drug delivery device with threaded housing and piston, and method for manufacturing the same
US10426893B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2015 |
| Grant date | Oct 1, 2019 |
| Priority date | — |
| Expiry date | Aug 16, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/44
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A drug delivery device for selecting and dispensing a number of user variable doses of a medicament includes a housing having a tubular portion with an inner thread, a piston rod having a threaded portion and a distal end, and a bearing having a distal face and a proximal face. The bearing includes a retaining stem protruding from the proximal face. The piston rod includes a distal portion having an outer diameter which is smaller than the inner diameter of the inner thread of the tubular portion and comprising at its distal end at least one retaining clip engaging the retaining stem. The axial length of the tubular portion is smaller than or equal to the axial distance between the proximal face of the bearing disc and the distal end of the threaded portion of the piston rod. During manufacturing of the device, the retaining clip engages the retaining stem prior to the inner thread of the tubular portion engages with the threaded portion of the piston rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.