Device for administering an injectable product in doses
First Claim
1. A device for administering an injectable product in doses, said device comprising:
- a) a casing comprising a receptacle for a container which contains said product and accommodates a piston, such that said piston can advance toward an outlet of the container for delivering a selected product dosage;
b) a dosing member comprising a dose setting member and a transfer member, the dose setting member and the transfer member being rotatably engaged;
c) a drive unit coupled to said transfer member such that the transfer member transfers a dosing movement to the drive unit;
d) operating means for causing the drive unit to perform a delivering movement by which the piston is advanced toward said outlet; and
e) a spiral restoring spring comprising coils surrounding each other spirally coupled to the drive unit whereby said restoring spring can selectively cause a movement of the drive unit counter to a dosing movement adjustment of the drive unit.
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Accused Products
Abstract
A device for administering an injectable product in doses including a casing having a receptacle for a container which contains the product and accommodates a piston such that the piston can advance towards an outlet for delivering a selected product dosage, a dosing member, with which a dosing movement can be performed relative to the casing for selecting the product dosage, a drive unit, which can be coupled to the casing and the dosing member such that the drive unit can be adjusted relative to the casing from a dosing starting position to a dosing end position by the dosing movement of the dosing member, an operating mechanism which causes the drive unit to perform a delivering movement by which the piston is advanced towards the outlet, and a restoring spring, which is secured in a tensioned state and is coupled to the drive unit by a release for causing a restoring movement of the drive unit towards its dosing starting position.
33 Citations
23 Claims
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1. A device for administering an injectable product in doses, said device comprising:
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a) a casing comprising a receptacle for a container which contains said product and accommodates a piston, such that said piston can advance toward an outlet of the container for delivering a selected product dosage; b) a dosing member comprising a dose setting member and a transfer member, the dose setting member and the transfer member being rotatably engaged; c) a drive unit coupled to said transfer member such that the transfer member transfers a dosing movement to the drive unit; d) operating means for causing the drive unit to perform a delivering movement by which the piston is advanced toward said outlet; and e) a spiral restoring spring comprising coils surrounding each other spirally coupled to the drive unit whereby said restoring spring can selectively cause a movement of the drive unit counter to a dosing movement adjustment of the drive unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A device for administering an injectable product in doses, said device comprising:
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a) a casing comprising a receptacle for a container which contains said product and accommodates a piston, such that said piston can advance toward an outlet of the container for delivering a selected product dosage; b) a dosing member comprising a dose setting member and a transfer member, the dose setting member and the transfer member being rotatably engaged; c) a drive unit coupled to said transfer member such that the transfer member transfers a dosing movement to the drive unit, wherein the drive unit comprises a spindle drive; d) operating means for causing the drive unit to perform a delivering movement by which the piston is advanced toward said outlet; and e) a spiral restoring spring coupled to the drive unit whereby said restoring spring can selectively cause both a complete restoring and a partial restoring movement of the drive unit counter to the dosing movement adjustment of the drive unit. - View Dependent Claims (22, 23)
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Specification