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Drive Mechanism For A Drug Delivery Device

a technology of driving mechanism and drug delivery device, which is applied in the direction of medical devices, intravenous devices, medical devices, etc., can solve the problems of unresolved simple and safe correction of set overdose by patients, physical infirmity of users, and impaired vision, and achieves the effect of convenient use of correction

Inactive Publication Date: 2007-10-18
TERUMO KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] Therefore, it is an object of the present invention to provide an alternative drive mechanism to existing technologies suitable for the efficient transmission of an actuation force in drug delivery devices, particularly compact devices, e.g., of pen-type shape, which additionally allows the dispensing of large doses of drug and which further provides the advantage of intuitive and easy to use correction of a set dose.

Problems solved by technology

In the case of those with diabetes, many users will be physically infirm and may also have impaired vision.
However, simple and safe correction of a set overdose by the patient remains unresolved without either dispensing the set amount of fluid or dismantling the cartridge.

Method used

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  • Drive Mechanism For A Drug Delivery Device
  • Drive Mechanism For A Drug Delivery Device
  • Drive Mechanism For A Drug Delivery Device

Examples

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embodiment 1

[0063] Embodiment 1 of the present invention is described with reference to the drawings.

[0064] An outline of the device (1) is described with reference to FIGS. 1 to 2.

[0065] The device is of the mechanical pen type and consists of:

[0066] a housing (2);

[0067] a cartridge-holder (2a) coupled to the distal end of the housing (2);

[0068] a cartridge (3), sealed by a piston (8) mounted in the proximal end of the cartridge and containing a liquid (4) drug, mounted in the cartridge-holder (2a);

[0069] a removable cap (12) attached to the distal end of the device;

[0070] a piston driving assembly (21) assembled in the proximal end of the housing (2).

[0071] The piston driving assembly transfers an activation force from the proximal end to the distal end during dispensing. The piston driving assembly (21) consists of a dose setting dial (22), an inner cylinder (23), a free lock (24), a lead screw (25), a plunger rod (26), a plunger rod holder (27), a release knob (28), a dose indicator ...

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Abstract

This invention relates to a drive mechanism for a drug delivery device, drug delivery devices comprising the drive mechanism of the invention and a method of assembling such drug delivery devices, which allow the user to select multiple doses of an injectable drug and to dispense the set dose of the drug.

Description

[0001] This invention relates to a drive mechanism for a drug delivery device that allows the user to select multiple doses of an injectable drug and for the dispensing of the set dosage of the drug and applying said drug to a patient, preferably by injection. In particular, the present invention relates to such devices, which are handled by the patients themselves. BACKGROUND OF THE INVENTION [0002] Drug delivery devices, which allow multiple dosing of the required dosage of liquid drug and administration of the liquid to a patient, are well known in the art. Generally, such devices have substantially the same purpose as that of an ordinary syringe. [0003] Injectors of this kind must meet a number of requirements to meet user needs. These devices need to be robust in construction, yet easy to use both in terms of the manipulation of the parts and understanding by a user of its operation. In the case of those with diabetes, many users will be physically infirm and may also have impa...

Claims

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Application Information

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IPC IPC(8): A61M37/00A61M5/20
CPCA61M5/24A61M5/31511A61M5/31551A61M5/31586A61M5/31575A61M5/3158A61M5/31585A61M5/31558A61M5/315A61M5/30A61M5/178A61M2207/00A61M5/31501A61M5/31528A61M2202/0478
Inventor SAIKI, MASARU
Owner TERUMO KK
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