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Injection devices

An injection device, sensitive technology, applied in the field of automatic injectors, syringes and other manually operated injection devices, which can solve the problem of not being able to provide automatic injection devices, etc.

Active Publication Date: 2014-01-22
OWEN MUMFORD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While this can be achieved in some cases, in others, especially where the fluid or material properties of the substance to be injected vary significantly with temperature, it may not be possible to provide a Automatic Injectors that Operate Consistently Outside of a Specified Temperature Range

Method used

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Examples

Experimental program
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Embodiment Construction

[0022] The autoinjector shown in the figures comprises a two-part housing comprising generally cylindrical front and rear housing parts 10', 10" connected by a screw coupling. A barrel 12 having a piston 14 and a needle 16 is mounted on the front housing. part 10', for overcoming the bias of spring 18 in as figure 1 The needle is shown moving between a retracted position inside the front housing 10' and an extended position in which the needle 16 protrudes from the front housing 10'.

[0023] The rear housing portion 10" includes an elongated plunger 20 having a front end that fits within the barrel of the syringe 12 and a rear end with a separate arrow formation 22 that engages the Behind the fixed shoulder 24 at the rear end of the rear housing part 10". The plunger 20 is biased forward by a main drive spring 26 . The firing button 28 is retained on the rear end of the housing 10', 10" by a retaining ring 30. The firing button 28 has an inner housing 32 which squeezes the ...

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PUM

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Abstract

An injection device operable to deliver a dose of medicament from a syringe or cartridge includes a temperature-sensitive arrangement for inhibiting operation thereof under predetermined temperature conditions. This may comprise a thermally responsive element that adopts a position in which operation of the device is inhibited when a temperature level is passed.

Description

technical field [0001] The present invention relates to injection devices, particularly, but not exclusively, to autoinjectors in which all or part of the injection cycle is automatic. The invention also relates to syringes and other manually operated injection devices. Background technique [0002] It is generally expected that an autoinjector will operate or function consistently over a wide temperature range. While this can be achieved in some cases, in others, especially where the fluid or material properties of the substance to be injected vary significantly with temperature, it may not be possible to provide a Automatic injection devices that operate consistently outside of a defined temperature range. For example, the viscosity of a drug may vary quite dramatically with temperature. Contents of the invention [0003] Therefore, we designed an injection device in which the user is warned if the temperature of the autoinjector is not consistent with the operating t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/20
CPCA61M5/2033A61M2205/0227A61M2205/0266A61M2205/0272A61M5/20A61M5/31A61M2005/206
Inventor 杰里米·马歇尔托比·柯维
Owner OWEN MUMFORD