Patent ID: 8191578

Claim:
A multi-port rotary disc valve adapted to allow fluid flow from at least one fluid source to a plurality of destinations in at least two operation modes, said valve comprising: a stator with fluid flow ports including a plurality of individual ports and at least one common port; each of said individual ports being adapted for fluid communication with at least one of said destinations, and said one common port being adapted for fluid communication with said source; said individual ports being arranged in spaced apart relationship within an individual ports' stator sector having a stator sector angular length; and a rotor having at least a first, a second and a third rotor sector with channels arranged therein, being opened to the atmosphere or adapted to connect the fluid flow ports of the stator between them in a plurality of predetermined combinations, each combination being associated with an angular position of the rotor with respect to the stator during at least partial clock-wise or anti clock-wise turn of the rotor in different predetermined sequences of said combination, said first rotor sector comprising a main outlet connecting channel extending along the entire length thereof and has a first sector angular length at least equal to said stator sector angular length, said second rotor sector comprising an inlet connecting channel for operating in one of said modes, said third rotor sector comprising an inlet connecting channel for operating in the other of said modes, each of the inlet channels having a side portion for connecting between said individual ports of the stator and said inlet channels of the rotor, said side portions being disposed on two sides of said first rotor sector and spaced therefrom.