Patent ID: 6182658
Filing Date: 2001-02-06
Classification: A61H,F16K

Abstract:
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.