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US 9,427,290 B2Granted
Dispensing device for a dental substance
Assignee3M Innovative Properties Company
InventorsAndreas Johannes Boehm, Marc Peuker, Alexander Walter, Peter Müller
Life of this patent
Estimating the term…
Abstract
A dispensing device for a dental substance is provided which has an outlet for the dental substance, and a valve for opening and closing the outlet. The device is switchable between a storage mode and an operative mode. In the storage mode a cannula is locked in the device and the valve opens the outlet, and in the storage mode the cannula can be released from the device and the valve closes the outlet. The device may facilitate handling and may be relatively inexpensive.
Claims16
A dispensing device for a dental substance, comprising:
- a chamber having a longitudinal axis that opens into an outlet;
- a piston, where the piston can move along the longitudinal axis through the chamber to urge the dental substance toward the outlet;
- a valve having a valve body and a valve element that move relative to each other for opening and closing the outlet, and wherein the valve element defines a conduit being adapted for receiving a cannula for connection with the outlet,
- the device being operable between a storage mode and an operative mode,
- wherein the device is further adapted such that activating the operative mode causes locking the cannula, when it is present, in the device, and rotating the cannula causes the valve to open the outlet wherein the cannula, when present, extends entirely through the conduit of the valve element to form a seal around the outlet;
- and
- wherein the device is adapted such that activating the storage mode causes
- the valve to close the outlet, and releasing the cannula, when it is present, from the device.
5 more elements
A dispensing device, comprising:
- a chamber having a longitudinal axis that opens into an outlet;
- a piston, where the piston can move along the longitudinal axis through the chamber to urge a dental substance toward the outlet;
- a valve having a valve body and a valve element that move relative to each other for opening and closing the outlet, the valve comprising a conduit, wherein the conduit has a widened portion;
- and
- a cannula for connection with the outlet, wherein the device is further adapted such that activating the operative mode causes locking the cannula, when it is present, in the device, and rotating the cannula causes the valve to open the outlet, wherein the cannula, when present, extends entirely through the conduit of the valve element to form a seal around the outlet;
- wherein the device is adapted such that activating the storage mode causes the valve to close the outlet, and releasing the cannula, when it is present, from the device.
3 more elements
Dependencies are inferred from the claim text.