Resuscitation and inhalation device
First Claim
1. A flow control valve apparatus, comprising;
- a chamber;
a valve member reciprocally mounted in said chamber and acted upon by gas pressure in said chamber;
a flow control valve, acted upon by said valve member to an open position;
means for connecting a high pressure source to an inlet of said flow control valve;
means for connecting a variable pressure volume to said chamber;
means for selectively connecting a low pressure volume to said chamber;
a first magnetic member on said valve member;
a second magnetic member in spaced opposition to said first magnetic member;
one of said first and second magnetic members being magnetized, to restrain movement of said valve member by said gas pressure in said chamber;
said valve member being moved against said restraint when said variable pressure reaches a predetermined maximum value, to permit closing of said flow control valve, and to permit said connection of said low vent pressure volume to said chamber; and
said valve member being moved with said restrain when said variable pressure reaches a predetermined low value, to open said flow control valve.
0 Assignments
0 Petitions
Accused Products
Abstract
A resuscitation and inhalation device which can be used alternatively in each of two modes. The flow of oxygen or gas is controlled by a control valve, itself controlled by a movable member acted upon by the pressure of oxygen or gas in a chamber after having flowed passed the control valve. On meeting a preset maximum pressure, the valve member moves to close the control valve. The movable valve member is acted upon by a magnetic field which is adjustable, and the magnetic field strength sets the pressure at which the valve member moves. Oxygen or gas is admitted to the control valve by two alternative inlet valves, one for resuscitation with only oxygen or gas flowing through the mask, and one for inhalation, with a mixture of oxygen or gas and air or a second gas being fed through the mask.
-
Citations
15 Claims
-
1. A flow control valve apparatus, comprising;
- a chamber;
a valve member reciprocally mounted in said chamber and acted upon by gas pressure in said chamber;
a flow control valve, acted upon by said valve member to an open position;
means for connecting a high pressure source to an inlet of said flow control valve;
means for connecting a variable pressure volume to said chamber;
means for selectively connecting a low pressure volume to said chamber;
a first magnetic member on said valve member;
a second magnetic member in spaced opposition to said first magnetic member;
one of said first and second magnetic members being magnetized, to restrain movement of said valve member by said gas pressure in said chamber;
said valve member being moved against said restraint when said variable pressure reaches a predetermined maximum value, to permit closing of said flow control valve, and to permit said connection of said low vent pressure volume to said chamber; and
said valve member being moved with said restrain when said variable pressure reaches a predetermined low value, to open said flow control valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- a chamber;
Specification