Abstract:
A delay mechanism for staging the operation of an automatic injection apparatus to ensure medication contents are properly delivered prior to the needled syringe of the apparatus being retracted. In one form, the delay mechanism includes a shuttle, a follower, a locking member, a damping compound, and a driver and a driver biasing element. The shuttle is for a needled syringe of the apparatus and includes a first latching element. The follower includes a second latching element and a cammable surface, which second latching element is for cooperating with the first latching element to limit motion of the shuttle relative to the follower in a second direction opposite the first direction. The locking member is movable from a locking position to a release position by engagement with the syringe plunger during an injection, the locking member, when in the locking position, preventing rotation of the follower relative to the shuttle, the locking member, when in the release position, allowing rotation of the follower relative to the shuttle. The damping compound is between the follower and a supporting surface to dampen rotation of the follower relative to the shuttle. The driver is rotatably fixed relative to the shuttle and includes a camming surface. The driver biasing element is for forcing the driver from a first position to a second position when the locking member moves to the release position, whereby during movement of the driver to the second position, the driver camming surface engages the follower cammable surface to force the follower to rotate relative to the shuttle from a latching position, at which the first and second latching elements cooperate, to an unlatching position, at which the second latching element is disengaged from the first latching element to allow movement of the shuttle for retracting the syringe needle into the housing of the automatic injection apparatus after injection. X-17598
Abstract:
A medical device (10) is provided which includes a shield system (14) and a syringe (12) which is coupled to the shield system. The shield system includes a syringe holder (26) and a shield (28) which is slidably coupled to the holder. A spring (30) resiliently urges the shield from a retracted position to an extended position. Stop members (48, 52) are provided on the holder and shield for maintaining the shield in the retracted position. The syringe is slidably coupled to the holder, and extends within the shield. Axial movement of the syringe with respect to the holder causes disengagement of the stop members, allowing the spring to move the shield to the extended position. Detends (58, 59) are provided on the holder for maintaining the shield in the extended position.
Abstract:
Devices and methods for slowing down or dampening the retraction velocity of an introducer needle used in connection with needle retracting safety vascular access devices. The devices and methods prevent splattering or dripping of blood caused by an introducer needle that retracts too quickly. The dampening devices can be easily modified to regulate the amount of dampening desired and can be retrofitted to existing vascular access devices designs.
Abstract:
Eine Injektionsvorrichtung (2; 102) weist ein Gehäuse (4), in dem eine Spritze (6) aufnehmbar ist, die eine Injektionsnadel (8), eine Aufnahmekammer (10), einen Kolben (12) und einen Kolbenstössel (14) aufweist, und eine Steuerungsanordnung (24) zur gesteuerten Betätigung der Spritze (6) während eines Anwendungsablaufes auf, der wenigstens einen Einstechhub, einen Injektionshub und einen Rückholhub umfasst. Dabei weist die Steuerungsanordnung (24) ein Betätigungselement (20) zur Beaufschlagung durch eine Antriebskraft (F), eine gegen- über dem Gehäuse (4) verschiebbare Spritzenaufnahme (16), an der die Aufnahmekammer (10) festlegbar ist, eine gegenüber dem Gehäuse (4) verschiebbare Stößelaufnahme (18), an der der Kolbenstößel (14) festlegbar ist sowie eine Übertragungseinrichtung (26) auf, mittels der die Stösselaufnahme (18) mit dem Betätigungselement (20) koppelbar ist. Dabei ist vorgesehen, dass die Übertragungseinrichtung (26) ein Zahnradgetriebe (28) aufweist, mittels dem in Abhängigkeit von einer Relativbewegung des Betätigungselementes (20) gegenüber dem Gehäuse (4) die Stösselaufnahme (18) antreibbar ist und das hierzu eine Verzahnung am Gehäuse (4) aufweist.
Abstract:
The present invention relates to a handheld automatic injection device comprising a housing (10, 30, 40; 40'), a piston rod (80) located within the housing (10, 30, 40; 40'), a drive member (70) permanently coupled to the piston rod (80), a dose setting member (50), which during dose setting rotates relative to the housing (10, 30, 40; 40') in a first direction and which during dose dispensing rotates relative to the housing (10, 30, 40; 40') in a second opposite direction, and a power reservoir (100) for driving the drive member (70). The drive member (70) is axially movable between a dose setting position, in which the drive member (70) is rotationally constrained to the housing, and a dose dispensing position, in which the drive member (70) is rotationally decoupled from the housing (10, 30, 40; 40'). The power reservoir comprises a reverse wound flat spiral spring (100) having a first end attached to a first spool (101) and a second end attached to a second spool (102), with one of the spools (102) being coupled to the drive member (70).
Abstract:
An injection device, comprising: a) a casing (3, 5, 6, 9) which accommodates or forms a reservoir (11) for a liquid drug; b) a plunger rod (10) which can move relative to the casing (3, 5, 6, 9) in an axially forward direction to deliver the drug; c) a dosing means (7) which can move in the forward direction relative to the casing (3, 5, 6, 9) to prime the reservoir (11) and which can rotate relative to the casing (3, 5, 6, 9) for selecting a dose to be injected, wherein rotation of the dosing means (7) relative to the casing (3, 5, 6, 9) is prevented until a priming operation for priming the reservoir (11) is completed; d)wherein the dosing means (7) comprises a dosing control means (7b, 7d) which is configured to enable rotation of the dosing means (7) at the end of the priming stroke for selecting the dose and to prevent a rotation of the dosing means (7) back into the position which the dosing means (7) had at the end of the priming stroke relative to the casing (3, 5, 6, 9).
Abstract:
The present invention relates to an automatic injection device (1) comprising : a container having a longitudinal axis A and movable between a first position and a second position, in which the needle is inserted, biasing means, for moving the container to its second position, retaining means (70, 73, 74) for maintaining said biasing means in a first stressed state, triggering means (90) for releasing said retaining means, said retaining means comprising a lever member having a pivoting part and a radial projection extending therefrom, said radial projection being in a first angular position when said retaining means is in its passive condition, said radial projection being in a second angular position, different from said first angular position, when said retaining means is in its active condition, the axis of said pivoting part being included in a transversal plane of said longitudinal axis A.
Abstract:
A disposable syringe and a push rod (3) for use in the disposable syringe. The push rod (3) comprises a proximal end (11), a distal end (10) and an axis (12) extending through the proximal end (11) and the distal end (10). The distal end (10) of the push rod (3) is provided with a snap-fitting mechanism (14) and a stop flange (13) located at a proximal side of the snap-fitting mechanism (14). The stop flange (13) comprises a main body portion (15) formed about the axis (12) of the push rod (3) and a plurality of finger portions extending from the main body portion (15) in a direction away from the axis (12) of the push rod (3). A smaller push force continues to be applied to the push rod (3) upon completion of injection, thereby achieving an additional stroke needed when the distal end (10) of the push rod (3) snap-fits with a needle seat (2) and lessening patient's pains.
Abstract:
The present invention relates to a dial-up/dial-down mechanism for an injection device by which a dose can be set by rotating a dose setting member in a first direction and which dose size can be reduced by rotating the same dose setting member in a second and opposite direction. The dial-up/dial-down mechanism operates a torsion spring which is strained when setting a dose and unstrained when rotating the dose setting element in the second direction. In order to secure the torsion spring when strained, a ratchet arm (21) following the rotation of the dose setting element in the first direction, engages a toothed element (10) such that engagement of the at least one ratchet arm (21) with teeth (12) of the toothed element (10) prevents unwinding of the torsion spring, and wherein the rotation of the dose setting member in the first direction moves the ratchet arm (21) from one tooth (12) to the subsequent tooth (12) of the toothed element (10), and rotation of the dose setting member in the second direction lowering the set dose activates the ratchet arm (21) to disengage the teeth (12) of the toothed element (10) and thereby allow the torsion spring to move the ratchet arm (21) in the second direction to the previous tooth (12) such that the force accumulated in the torsion spring reduces incrementally. In order to provide a smooth movement when dialling down the set dose, the at least one ratchet arm (21) is associated with friction means (16, 30) dampening the movement of the ratchet arm (21) by the torsion spring.
Abstract:
The present invention relates to a medicament delivery device that comprises an elongated housing; a medicament container carrier adapted to house a medicament container to which a medicament delivery member is attached and wherein the carrier is slidably accommodated within the housing; a trigger unit; a cover unit coaxially and slidably arranged within the housing; a release mechanism adapted to be partly actuated by the operation of the trigger unit and partly actuated by the movement of the cover unit; a preloaded drive unit releasably connected to the medicament container carrier and controlled by the release mechanism for advancing firstly the medicament container carrier to a predetermined proximal position in relation to the housing and upon the carrier reaching the predetermined proximal position, the drive unit becomes disconnected from the carrier for advancing a slidable stopper within the container and thereby dispensing the medicament; and a braking mechanism acting between the preloaded drive unit and the release mechanism for controlling the speed of the preloaded drive unit when advancing the slidable stopper within the container.