Patent ID: 8216742

Claim:
A gas separator for a fuel cell configured to have concavo-convex structures formed in a mutually reversed relation on two sides thereof and to define a flow path for a first fluid on a first side thereof and a flow path for a second fluid on a second side thereof, the gas separator comprising: a center area designed to have therein multiple linear convexes, which are extended in a first direction to introduce the first fluid and the second fluid in the first direction on the respective sides and are arranged to make a flow of the first fluid in one fixed direction on at least the first side, the center area being arranged to cause non-uniformity of a flow rate distribution of the first fluid based on a relation to a flow direction of the first fluid on the first side; and flow distribution areas arranged across the center area to be adjacent to respective ends of the multiple linear convexes and designed to have multiple first projections that are protruded from the first side to be arranged apart from one another, and multiple second projections that are protruded from the second side to be arranged apart from one another, each of the flow distribution areas being structured to make a flow of the first fluid to be supplied from or discharged to the flow path of the first fluid formed in the center area on the first side, wherein the first fluid on the first side is made to flow from one end section in a direction perpendicular to the first direction of one of the flow distribution areas or one flow distribution area to an opposed end section in the direction perpendicular to the first direction of the other of the flow distribution areas or the other flow distribution area, and in at least one of the flow distribution areas, the flow path of the first fluid defined by a plurality of the first projections formed in a region corresponding to a first section of the center area having a first flow rate of the first fluid is designed to have a smaller sectional area, through the use of the plurality of first projections, in the first direction than the flow path of the first fluid defined by a plurality of the first projections formed in a region corresponding to a second section of the center area having a second flow rate of the first fluid, wherein the second flow rate is lower than the first flow rate.