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US 11,857,995 B2Granted
Two-component piston for a cartridge, and a cartridge
AssigneeMedmix Switzerland AG
InventorsManfred Obrist, Philipp Seiler, Renato Brunner
Life of this patent
Estimating the term…
Abstract
A method of making a two-component piston, the two-component piston including a piston cover as the first component and a piston body as the second component. The piston cover is arranged adjacent to the piston body and is configured to be moved relative to the piston body.
Claims2
A two-component piston for a cartridge comprising:
- a piston cover;
- and
- a piston body, the piston cover movable relative to the piston body, and the piston cover being non-releasably connected to the piston body by a non-releasable connection, the non-releasable connection between the piston body and the piston cover being produced by a web of material projecting from the piston body and extending through an aperture in attachment portion of the piston cover, and
- the attachment portion projecting from the piston cover at least generally in a direction into the piston body.
1 more element
A cartridge comprising:
- an outlet;
- a chamber;
- a piston comprising a piston cover as a first component and a piston body as a second component, the piston cover arranged adjacent to the piston body and configured to be moved relative to the piston body, the piston cover and the piston body being formed in an injection mold by an injection molding process, and the piston cover being formed in a first mold of the injection mold, and parts of the first mold specific to a rear side of the piston cover being removed from the injection mold after at least partly curing the piston cover, and the piston cover configured to be used as a part of a second mold for the piston body, the piston being arranged in the chamber, the piston cover being non-releasably connected to the piston body forming a no connection, the non-releasable connection formed by a web of material projecting from the piston body extending through an aperture in an attachment portion of the piston cover, the attachment portion projecting from the piston cover at least generally in a direction into the piston body;
- and
- a flowable mass arranged in the chamber.
2 more elements
Dependencies are inferred from the claim text.