Fluid control valves
OwnerZamir Hayekinventor
Life of this patent
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Abstract
A fluid control valve for connection between a positive fluid pressure source, a negative fluid pressure source and a device to be connected alternately to the pressure sources, comprising a body having ports for connection to the fluid pressure sources and the device, and a rotary member rotatable with respect to the body and adapted selectively to interconnect the ports, whereby the rotary member is operable on rotation in a single sense to connect alternately the positive fluid pressure source and the negative fluid pressure source to the device.
Claims8
The combination of a fluid control valve and a blower having an inlet and an outlet, the valve being connected between the blower outlet and the blower inlet and the valve comprising a body and a rotary member, the body having a first port, a second port connected to the blower outlet, a third port connected to the blower inlet and a fourth port for providing a vent to atmosphere and the rotary member being rotatable about an axis with respect to the body and adapted selectively to connect said ports, wherein the axis extends from the fourth port whereby the rotary member is operable on rotation in a single sense to connect in a first position the second port to the first port and the third port to the fourth port and to connect in a second position, the third port to the first port and the second port to the fourth port and whereby the rotary member has a third position in which it closes the second and third ports, the third position being intermediate the first and second positions.
A ventilator apparatus for use in the ventilation of the lungs of a patient, comprising an enclosure for receiving at least the chest region of the patient's body, and a means for altering the pressure in the enclosure to produce ventilation, said means comprising the combination of a fluid control valve and blower having an inlet and an outlet, the valve being connected between the blower outlet and the blower inlet, and the valve comprising a body and a rotary member, the body having a first port, a second port connected to the blower outlet, a third port connected to the blower inlet and a fourth port for providing a vent to atmosphere and the rotary member being rotatable about an axis with respect to the body and adapted selectively to connect said parts, wherein the axis extends from the fourth port whereby the rotary member is operable on rotation in a single sense to connect in a first position the second port, to the first port and the third port to the fourth port and to connect in a second position, the third port to the first port, and the second port to the fourth port and whereby the rotary member has a third position in which it closes the second and third ports, the third position being intermediate the first and second positions;
- wherein the first port is coupled to the enclosure.
A physiotherapy apparatus for use in the ventilation of the lungs of a patient, comprising an enclosure for receiving at least the chest region of the patient's body, and a means for altering the pressure in the enclosure to produce ventilation, said means comprising the combination of a fluid control valve and blower having an inlet and an outlet, the valve being connected between the blower outlet and the blower inlet, and the valve comprising a body and a rotary member, the body having a first port, a second port connected to the blower outlet, a third port connected to the blower inlet and a fourth port for providing a vent to atmosphere and the rotary member being rotatable about an axis with respect to the body and adapted selectively to connect said ports, wherein the axis extends from the fourth port whereby the rotary member is operable on rotation in a single sense to connect in a first position the second port to the first port and the third port to the fourth port and to connect in a second position, the third port to the first port, and the second port to the fourth port and whereby the rotary member has a third position in which it closes the second and third ports, the third position being intermediate the first and second positions;
- wherein the first port is coupled to the enclosure.
Dependencies are inferred from the claim text.