Autobase for infant car seat

Claim 1

A car seat comprising: a base for positioning upon a vehicle seat; an infant carrier attachable to the base; the base having an upper surface for the receipt of the infant carrier thereon, a lower surface for being received upon the vehicle seat and retained thereon by a seat belt, the base having a foot end and a head end; the infant carrier including a foot end and a head end; coupling mechanisms for releasably securing the base and infant carrier including a first coupling mechanism and a second coupling mechanism; the first coupling mechanism including an inverted J-shaped hook extending upwardly from the foot end of the base, the hook providing an upwardly extending recess with an upper surface beneath a curved portion of the hook adapted to receive an upper edge of the foot end of the infant carrier therein; and the second coupling mechanism including alignable abutment surfaces on each of the base and the infant carrier, including a downwardly facing abutment surface at the head end of the base for contacting an upwardly facing abutment surface of the infant carrier, the upwardly facing abutment surface extending from a release block pivotably secured at the head end of the infant carrier, the release block biased toward the downwardly facing abutment surface of the base when the infant carrier is positioned thereon, the release block including a grip portion for pivoting the release block away from the abutment surface of the base such that the abutment surface of the release block clears the abutment surface of the base and for pivoting the upper edge of the infant carrier out from the hook recess to enable the infant carrier to be released from the base.