Security vehicle such as for transporting prisoners having double doors

Claim 1

In a security vehicle including a frame, wheels supporting said frame, a passenger compartment supported by said frame, said passenger compartment including seats and having a rear wall and a front wall, an ingress and exit opening into said passenger compartment in said rear wall, said opening defined by a top edge, a bottom edge, a first side edge and a second side edge, the improvement comprising a pair of outer doors, one of said outer doors hinged to said rear wall at said opening first side edge, the other of said outer doors hinged to said rear wall at said opening second side edge, said outer doors having a closed position spanning said rear wall opening, means for securing said outer doors in their closed position, a pair of inner doors located between said outer doors and said front wall, one of said inner doors hinged to said passenger compartment adjacent the hinge connection of said one outer door, the other of said inner doors hinged to said passenger compartment adjacent the hinge connection of said other outer door, said inner doors having a closed position across said rear wall opening, and means for securing said inner doors in their closed position, said passenger compartment including a vertical frame part located within the plane of said inner doors when in their closed position, each inner door extending to said vertical frame part and being secured thereto by said inner door securing means.