Metering instrument, particularly for injecting medicinal liquid
First Claim
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1. A metering instrument, comprising:
- a body;
a liquid reservoir connected to said body;
a plunger displaceable in said reservoir along a reference direction;
a perforable stopper closing off an other end of the reservoir through which a dose of the liquid passes;
a pusher movable translationally inside the body;
a tail mounted inside the pusher, said tail having a rack and being movable translationally with the pusher, wherein the tail and pusher are engaged such that when the pusher moves translationally with respect to the tail, the pusher does not rotate substantially with respect to the tail;
a first ratchet device disposed on the body, said first ratchet device being in engagement with the rack, wherein the engagement between the body and the rack prevents the tail from moving in a direction opposite the reference direction; and
a second ratchet device disposed on the pusher, said second ratchet device being in engagement with said rack,wherein the body includes a plurality of axial slots of different lengths, said pusher having a pin in selective engagement with at least one of said slots in the body.
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Abstract
A metering instrument for dispensing several doses of a liquid includes a tubular body designed to be held by the user, a reservoir containing the liquid, a movable tail mounted inside and on the axis of body, and a pusher grippable by the user and mounted translationally in the body. The tail has a rack constituted by successive annular notches, and the body has several axial slots distributed over its periphery. The pusher includes an outwardly projecting pin that is designed to engage one of the axial slots of the body.
212 Citations
22 Claims
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1. A metering instrument, comprising:
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a body; a liquid reservoir connected to said body; a plunger displaceable in said reservoir along a reference direction; a perforable stopper closing off an other end of the reservoir through which a dose of the liquid passes; a pusher movable translationally inside the body; a tail mounted inside the pusher, said tail having a rack and being movable translationally with the pusher, wherein the tail and pusher are engaged such that when the pusher moves translationally with respect to the tail, the pusher does not rotate substantially with respect to the tail; a first ratchet device disposed on the body, said first ratchet device being in engagement with the rack, wherein the engagement between the body and the rack prevents the tail from moving in a direction opposite the reference direction; and a second ratchet device disposed on the pusher, said second ratchet device being in engagement with said rack, wherein the body includes a plurality of axial slots of different lengths, said pusher having a pin in selective engagement with at least one of said slots in the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification