Injection device with tensioning spring and tensioning element
First Claim
1. An injection device comprising a housing, a plunger rod, a container for a substance to be dispensed, wherein the container is manually inserted in the injection device by a user prior to dispensing, said manual insertion including moving the container relative to the injection device and the housing and, after being inserted, the container is moveable relative to the injection device, a dispensing spring supported on a part of the injection device, and a coupling element for coupling the container with the dispensing spring so that the dispensing spring is tensioned simultaneously by and with the manual insertion movement of the container, wherein, after the insertion movement of the container, the tensioned dispensing spring moves the plunger rod to cause an amount of the substance to be dispensed.
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Accused Products
Abstract
An injection device including a receiving device movable in an insertion movement relative to the injection device, a tensioning element, e.g. a spring, which bears on a part of the injection device, and a coupling element for coupling the receiving device to the spring such that, during an insertion movement of the receiving device the spring is tensioned. In some embodiments, the invention encompasses a method for preparing an injection device for dispensing a substance from an ampoule, wherein a discharging spring of the injection device is tensioned by introduction of the ampoule into the injection device.
79 Citations
22 Claims
- 1. An injection device comprising a housing, a plunger rod, a container for a substance to be dispensed, wherein the container is manually inserted in the injection device by a user prior to dispensing, said manual insertion including moving the container relative to the injection device and the housing and, after being inserted, the container is moveable relative to the injection device, a dispensing spring supported on a part of the injection device, and a coupling element for coupling the container with the dispensing spring so that the dispensing spring is tensioned simultaneously by and with the manual insertion movement of the container, wherein, after the insertion movement of the container, the tensioned dispensing spring moves the plunger rod to cause an amount of the substance to be dispensed.
- 3. An injection device comprising a housing, a holder device for a substance to be dispensed, the holder device able to move relative to the injection device or a part thereof, a dispensing spring supported on a part of the injection device and a coupling element for coupling the holder device with the dispensing spring, wherein a user manually inserts the holder device into the injection device and during the manual insertion the holder device is moved relative to the injection device and the housing and the dispensing spring is simultaneously tensioned, which tensed dispensing spring subsequently moves a plunger rod of the injection device to dispense the substance.
- 21. A method of preparing an injection device for dispensing a substance from an ampoule, the method including the step of tensioning a dispensing spring of the injection device during a user of the device manually introducing an end of the ampoule, opposite a dispensing end of the ampoule, into the injection device.
Specification