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Rotary pump driven medicament delivery device

A technology of medicines and rotors, applied in the field of rotary pumps, can solve the problems of loss of dose accuracy, harmfulness, etc.

Active Publication Date: 2020-06-16
麦迪可投资股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When such pumps are used to deliver medication to patients during injections and / or boluses, this loss of volume or lower than expected expulsion is detrimental to dosage accuracy

Method used

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  • Rotary pump driven medicament delivery device
  • Rotary pump driven medicament delivery device
  • Rotary pump driven medicament delivery device

Examples

Experimental program
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Embodiment Construction

[0026] Conventional or known Wankel-type rotary pump designs (see figure 1 ) have not been used to deliver drugs accurately and precisely to patients. This may be due to the inherent inability of known designs to repeatedly deliver accurate doses of drug, which is of paramount importance in all injectable or pump type medical devices. The disclosed rotary pump design 1 uses a three-lobed rotor 2 within a double-lobed chamber 16, which differs from conventional Wankel-type rotors in that the three lobes 2a, 2b, and 2c (or sides) Each of these contains two separate sections (see Figure 3A ). This differs from conventional Wankel designs which have only a single continuous curved section on each side of the rotor (see Figure 3B )forms a contrast. The rotor 2 of the present disclosure also has a pair of two peripheral curved surfaces 20 sharing a common apex 22, wherein a first portion of each peripheral surface 21 adjacent the apex defines a non-smooth curved surface. Fi...

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PUM

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Abstract

A rotary pump is presented for use in a medicament delivery device, where the pump has a back plate having an inner surface and a rotor housing is positioned adjacent to the back plate having a peripheral wall. A front plate support is connected to the back plate and a flexible front plate is positioned between the front plate support and the rotor housing. The pump is rotated using a planetary gear transmission, where an eccentric shaft is operatively connected to the planetary gear mechanism. A rotor is rotationally fixed to the eccentric shaft and movably positioned within rotor housing. The rotor has three lobes, where each lobe has two peripheral curved surfaces sharing a common apex, where a first portion of each peripheral surface adjacent to the apex defines a non-smooth curve.

Description

technical field [0001] The present disclosure relates to a rotary pump and to a medical device for administering one or more liquid medications to a patient using a rotary pump mechanism to supply the medication via a needle or other conduit. Rotary pumps deliver accurate volumetric flow of drug using a uniquely designed rotor that prevents unwanted or accidental transfer of drug from one chamber to another. Background technique [0002] The use of rotary pumps based on the original Wankel internal combustion engine design is known, but not in widespread commercial use. For example, U.S. Patent Publication 2017 / 0072132 discloses a medical injection system using a rotary pump with a bilobed rotor, and U.S. Patent No. 4,551,073 discloses the use of a rotary pump for pumping blood during clinical procedures. The trochoidal rotor piston. Of the known types of rotary pumps commonly used in the medical field, all rotary pumps use a standard Wankel three-lobed rotor design or a t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/22
CPCF04C14/20F04C2240/30F04C2270/185F05C2203/06F05C2251/02F04C2/22A61M5/14212F04C2240/20F04C15/0065F04C14/265F04C13/001F04C15/0015F04C15/008F04C2240/60F04C2240/40
Inventor J.加布里尔H.贝赫托尔德
Owner 麦迪可投资股份公司
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