Piston for dispensing a flowable component from a cartridge
AssigneeSulzer Mixpac AG
InventorRalf Seifer
Life of this patent
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Abstract
A piston for dispensing a flowable component from a cartridge includes a piston having a base body and a venting element. The base body has a passage connecting a component side and an actuation side and has a passage opening. The venting element has an internal connection element and a pin which is partly arranged in the passage opening of the base body. The internal connection element and the pin are connected by a spring element. The pin of the venting element can adopt a sealing position and an aerating position. To enable a secure sealing, the spring element is configured such that it includes an angle of a maximum of 80° with the axial direction in the sealing position of the pin at a connection line to the internal connection element in the direction of an actuation side.
Claims14
A piston for dispensing a flowable component from a cartridge, the piston comprising
- a base body;
- and
- a venting element,
- the base body having a component side, an actuation side and a passage connecting the component side and the actuation side and having a passage opening;
- the venting element having
- an internal connection element by which the venting element is connected to the base body, and having an internal surface extending in an axial direction in a direction of the actuation side;
- a pin arranged at least partly in the passage of the base body, and
- a spring element connecting the internal connection element and the pin, and which is connected to the internal connection element along a connection line defined by the internal surface of the internal connection element,
- the pin of the venting element
- configured to adopt
- a sealing position in which the pin is aligned along the axial direction and the passage opening is closed in an airtight manner, and
- an aerating position in which an exchange of air is capable between the component side and the actuation side via the passage,
- the venting element being arranged and configured such that the spring element is configured to urge the pin into the sealing position, and
- the spring element extending from the internal connection element so as to define an angle of a maximum of 80° with the internal surface of the internal connection element at the connection line in the sealing position of the pin.
Dependencies are inferred from the claim text.