Abstract: A coupling and web adjuster to attach an infant seat to the passenger seat of a vehicle having a fixedly mounted rigid member to which the seat may be attached. The web adjuster has a cylindrical bar with a generally oval cross-section and a pair of ears mounted near each of its ends; a web that extends at least partially around the bar, a frame with a pair of channels in which the ears of the bar may slide, and one or more mechanical springs to normally push the bar toward the web stop and against the web. One version of the coupling is characterized by a frame having a notch on its distal end with a mouth/seat that is adapted to receive the fixedly mounted rigid member and a lever that is pivotally mounted inside the frame to hold the rigid member inside the mouth. The lever has a downwardly projecting finger that blocks the mouth of the notch when moved in one direction and allows access to the notch when moved in the other direction.

Abstract: A rotary coupling to attach an infant seat to the passenger seat of a vehicle. This invention is a child-restraining device for mounting in the passenger seat of a vehicle that has at least one rigid member fixedly mounted in the bite between the passenger seat's seat portion and back portion. In particular, the child-restraining device of this invention has a child seat and at least one rotary coupling to attach the child seat to the rigid member. The rotary coupling is characterized by: a rigid hollow cylinder with two notches in one end, a piston that slides back and forth inside the cylinder, a spring to push the piston toward the notches; a means to prevent the piston from sliding out of the cylinder, and a means to attach the rotary coupling to the child seat. The coupling is operated by pushing the piston back within the cylinder and placing the rigid member in the cylinder's notches.