Abstract: A barrier may be configured to maintain a fixed position with respect to a seat, the barrier separating a first space from a second space, a seatbelt buckle may be configured to maintain a fixed position with respect to the barrier in the second space, the buckle includes an opening to receive a seatbelt tongue and a release button to release the tongue from the buckle, the barrier may include a slot having dimensions selected to permit passage of the tongue from the first space into the opening and prevent an object from passing through the slot to operate the release button. A force-transfer-structure, coupled between the release button and a solenoid may transfer a force exerted by the solenoid to the release button, where the buckle and force-transfer-structure maintain operational alignment therebetween. A second structure can operate the release button in event that the solenoid is inoperable.

Abstract: A motion assembly that produces pitch and roll motions includes lower and upper plates. A pivotable coupling having upper and lower shafts extending from its center is coupled between the upper and lower plates. At least two linear actuators are coupled between the plates. Extension and retraction of the actuators pivots the upper plate about the pivotable coupling relative to the lower plate. A vehicle includes two steerable propulsion wheels coupled to a chassis. A lower plate of a pitch and roll assembly, similar to that just described, couples to the chassis via a slew bearing. Seating is coupled to the upper plate. The seating rotates with respect to the chassis via controlled rotation of the slew bearing with reference to the chassis. The seating can be rotated to point in any direction with respect to the chassis regardless of the direction the steerable propulsion wheels move the chassis.