Patent ID: 7131696

Claim:
A seat device for a vehicle, said seat device comprising: a seat-supporting post unit adapted to be mounted on and standing upright from a chassis of the vehicle; a lower bracket secured to said seat-supporting post unit; a seat unit including an upper bracket that is pivoted to said lower bracket so as to permit rotation of said seat unit relative to said seat-supporting post unit between folded and non-folded positions, and a seating member that is secured to said upper bracket; a first interlocking unit having first and second engaging members that are formed on said lower bracket; and a second interlocking unit mounted on said upper bracket and including a third engaging member that is movable in a substantially linear path relative to said upper and lower brackets for engaging releasably said first engaging member when said seat unit is disposed at said non-folded position, thereby retaining said seat unit at said non-folded position, and for engaging releasably said second engaging member when said seat unit is disposed at said folded position, thereby retaining said seat unit at said folded position.