Back to results
US 12,370,571 B2Granted
Multi-chamber cartridge
Assigneefischerwerke GmbH & Co. KG
InventorsSimon Hüglin, Clemens Schmidt, Konstantin Schelleis
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
Assigneefischerwerke GmbH & Co. KG
InventorsSimon Hüglin, Clemens Schmidt, Konstantin Schelleis
Estimating the term…
A multi-chamber cartridge having an outer tube and an inner tube arranged coaxially in the outer tube for a separate storage of two components—e.g., a hardener and binder of a two-component synthetic resin. The multi-chamber cartridge has a pushing-out element with four cutting edges, which cut the inner tube of the multi-chamber cartridge into four strips when the multi-chamber cartridge is pushed out, that roll up, fold, and/or bunch up in four receiving spaces in the pushing-out element. The pushing-out element has a head pin, the head of which seals in the inner tube. In order to injection-mold the pushing-out element from plastic, a collar of the pushing-out element surrounding the head pin has two collar openings opposite each other, through which two sliders of an injection mold for demolding the pushing-out element are pulled out after injection molding, that form a shank of the head pin.
A multi-chamber cartridge having a longitudinal axis, having an outer tube parallel to the longitudinal axis of the multi-chamber cartridge, and an inner tube arranged in the outer tube and parallel to the longitudinal axis of the multi-chamber cartridge, having an outlet for the outer tube and the inner tube at a front end of the multi-chamber cartridge, and having a pushing-out element for pushing out the multi-chamber cartridge which is displaceably arranged in the outer tube for pushing out the multi-chamber cartridge in the direction of the longitudinal axis in the multi-chamber cartridge such that the pushing-out element pushes out contents of the outer tube and the inner tube through the outlet of the multi-chamber cartridge when the pushing-out element is displaced in the direction of the front end of the multi-chamber cartridge in the outer tube of the multi-chamber cartridge, wherein the pushing-out element has at least one cutting edge such that, upon displacement of the pushing-out element in the direction of the longitudinal axis of the multi-chamber cartridge in the direction of the front end of the multi-chamber cartridge in the outer tube, the cutting edge of the pushing-out element cuts through the inner tube in a longitudinal direction, wherein the pushing-out element has an inner plunger for pushing out the inner tube and a circumferential inner seal which rests in a circumferentially sealing manner against an inner circumference of the inner tube behind which the inner plunger tapers to form an undercut, and the inner seal of the inner plunger in the outer tube of the multi-chamber cartridge is surrounded by a cylindrical collar of the pushing-out element which surrounds the inner tube and which has a collar opening radially outside the undercut at the taper behind the inner seal of the inner plunger such that the undercut is accessible radially from outside through the collar opening in the collar of the pushing-out element.
Dependencies are inferred from the claim text.