Title:
FLUID MIXING DEVICE AND DEMAND VALVE USEFUL THEREWITH
Document Type and Number:
Japanese Patent JP3270587
Kind Code:
B2
Abstract:
PURPOSE: To provide a mixture containing an air/oxygen ratio by making a mixture of a plurality of fluids flow from an outlet by axially displacing a valve member having a cylindrical wall formed with a slot and setting and controlling a mixing ratio of introduced fluids at a circumferential rotation position of the valve member.
CONSTITUTION: In this fluid mixing device for preparing a mixture of air and oxygen dosed to a patient having a respiratory disease, a mixing ratio of two kinds of fluids entering through inlets 21, 22 is preset by rotating a cover plate 5 and rotating a valve member 3 and a cylindrical wall 32. Namely, a ratio that a slot 32a on the cylindrical wall 32 is matched to slots 25a, 25b of inlet end walls 25, 26 is determined. A pressure of oxygen supplied to the inlet 21 is reduced to a pressure of air supplied to the inlet 22 side by a demand valve 70. The mixture is supplied from an outlet 23 to the device by the movement of the valve member 3 against a spring 4 corresponding to a negative pressure applied from an respiratory device to the outlet 23 at the time of supplying the mixture.
Inventors:
Carmel Adahan
Application Number:
JP21508793A
Publication Date:
April 02, 2002
Filing Date:
August 06, 1993
Export Citation:
Assignee:
Carmel Adahan
International Classes:
A61M16/20; A61M16/12; F16K11/00; F16K11/078; F16K11/085; G05D11/00; G05D11/03; (IPC1-7): F16K11/078; A61M16/20; F16K11/085; G05D11/00
Domestic Patent References:
| JP6443338A |
Other References:
【文献】米国特許4436090(US,A)
【文献】米国特許4702240(US,A)
【文献】米国特許5095950(US,A)
【文献】米国特許3347268(US,A)
【文献】米国特許4702240(US,A)
【文献】米国特許5095950(US,A)
【文献】米国特許3347268(US,A)
Attorney, Agent or Firm:
Mitsuo Adachi (1 outside)