Ampuls and apparatus thereon for opening same
AssigneeMerck Patent GmbH
InventorsGerhard Wieland, Klaus Steckenreuter, Wolfgang Gernand, Helmut Simgen
Life of this patent
Estimating the term…
Abstract
The invention relates to opening aids for an ampul which is closed by upper and lower plastic membranes. The opening aids are funnel-shaped sleeves, one of which contains a membrane welded to one of the plastic membranes closing the ampul, and the other of which includes a plastic punch for rupturing the upper membrane.
Claims11
An opening aid for ampuls (2) which are closed by plastic membranes (1), the opening aid being in the form of a sleeve (3) configured as a funnel, wherein the sleeve contains a membrane (4) welded to the plastic membrane (1).
An ampul including apparatus associated therewith to facilitate opening, emptying and rinsing the ampul, the ampul and apparatus comprising:
- an ampul body of a first diameter, said ampul body having upper and lower end portions having upper and lower end openings therethrough;
- first and second membranes covering said upper and lower end openings, respectively;
- helical thread means on the ampul body adjacent the lower end portion;
- a lower end cap having helical means cooperating with the helical thread means on the lower end portion when the lower end cap is in the closed position, the lower end cap having a portion thereon welded to the first membrane wherein when the lower end cap is rotated with respect to the ampul body, the lower end cap moves axially with respect to the ampul body and ruptures the first membrane to allow liquid in the first membrane to flow out through the lower end portion of the ampul;
- and
- means for rupturing the second membrane closing the upper end opening of the ampul.
Dependencies are inferred from the claim text.