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A one way valve that uses fluid pressure to open and close the valve

A one-way valve, fluid technology, applied in the direction of the valve, can solve the problem of blood and other problems

Inactive Publication Date: 2009-12-16
OCCUPATIONAL & MEDICAL INNOVATIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Another disadvantage of backflow prevention valves is that there is still the possibility of blood ending up near the valve inlet which can be a source of hazard

Method used

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  • A one way valve that uses fluid pressure to open and close the valve
  • A one way valve that uses fluid pressure to open and close the valve
  • A one way valve that uses fluid pressure to open and close the valve

Examples

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Embodiment Construction

[0072] Refer to the attached drawings and first to the figure 2 , showing a valve assembly comprising an inlet 10 and an outlet 11, a flow channel extending from the inlet 10 through the valve assembly to the outlet 11, disposed in the flow channel and capable of image 3 , 4 Push-forward open position shown and figure 2 A plunger (or piston) 12 reciprocating between the shown retracted closed positions, a resilient flap 14 extending around the plunger 12, and a variable volume chamber 16 (see image 3 ), the chamber is at image 3 , 4 larger in figure 2 smaller or zero.

[0073] With reference to the parts shown in more detail, the valve assembly in this embodiment comprises an outer body formed of two parts joined together, a first (top) part 17 and a second (bottom) part 18 . These parts are made of plastic material and joined together by any suitable method. Part 17 is substantially hollow. The part 17 comprises an outer channel 19, which is circular and has a ...

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PUM

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Abstract

A positive pressure one way medical valve contains an inlet (10), outlet (11), an internal flow path between the inlet and the outlet and a plunger (12) movable between a retraced sealing position, where backflow is reduced or prevented and an extended open position, where fluid can flow from the inlet to the outlet. The plunger is moved from the retraced to the extended position by insertion of a tip onto the inlet (10). A variable volume chamber (23) is defined partially by an elastomeric member (14) that is stretched, when plunger is in the extended position and reduced, when the plunger is in the retraced position so to increase or decrease the volume of the chamber respectively. A valve (50), which is movable between open and closed positions by the presence or absence of fluid passing through the inlet, immediately seals the flow pathway before the plunger is retraced.

Description

[0001] This application is a divisional application of a Chinese invention patent application with an application date of April 29, 2005, an application number of 200580014762.6, and an invention title of "a one-way valve that is opened and closed by fluid pressure". technical field [0002] The present invention relates to a valve that can be connected to a catheter, needle or any other type of injection device and has a specific structure to prevent backflow. More particularly, the present invention relates to a needle-free injection valve for a needle-free IV system. The invention also relates in particular to a one-way valve to prevent backflow, wherein the one-way valve comprises a valve or similar device which is opened by the presence or absence of fluid flow, and importantly also by the presence or absence of fluid flow. Closed so that the one-way valve can be closed to prevent or reduce backflow without moving any part of the valve, at least initially. The invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M39/24A61M39/26
Inventor 布鲁斯·利·基恩
Owner OCCUPATIONAL & MEDICAL INNOVATIONS