Abstract: A hardtop shell is provided for vehicles having a variety of vehicle body styles, including all sport utility vehicles (SUV), trucks and crossovers. The hardtop shell follows the top frame of the vehicle/OEM roll cage, allowing for much more open-air space, when removing modular portions of the hardtop. The hardtop shell follows the top frame of the vehicle. The hardtop shell also can be mainly fabricated out of metal. The hardtop shell comprises a main outer frame that mates to the body and frame of the vehicle, and may also comprise modular and removable additional components such as roof panels, a rear door and gull wings. The main frame mates to the body or frame of the vehicle with a plurality of bolts, nuts, rivnuts, gaskets, seals, compression latches and other similar hardware or methods.

Abstract: A truck shell is provided that is able to incorporate a variety of retractable, convertible and/or removable rooftops. The truck shell is designed to be able to drive with or without the rooftop component installed, and with or without the rooftop component in the open or closed position. The truck shell comprises a frame structure which enables its use without a rooftop component installed while retaining structural integrity, and also enabling the use of a number of different structures and styles of rooftops.

Abstract: An oscillation apparatus, system, and method are provided for creating pulsing pressure waves in a fluid flow that can be used to open and close flow paths for fluid flow in a reservoir, mixing a fluid, or keeping a particulate suspension homogenous in a fluid. The system includes an oscillation apparatus including a motor and an oscillating valve that rotates at a particular speed and frequency while a pump circulates a fluid through the oscillation apparatus, which outputs the fluid in a pulsing wave. The apparatus or system may further include one or more sensors and a control system that control the speed and the frequency of the rotation of the oscillating valve.