Abstract: A companion engineering and manufacturing process to optimize multi-layered zirconia crowns, and improved substructure are provided.

Abstract: A companion engineering and manufacturing process to optimize multi-layered zirconia crowns, and improved substructure are provided.

Abstract: A variable fan drive for a vehicle powered by an internal combustion engine is provided. A drive side assembly utilizes a hydraulic actuator to actuate a variable sheave assembly. The variable sheave assembly drives a sheave assembly of a driven side assembly by way of a v-belt. The hydraulic actuator has a piston coupled to the variable sheave assembly. The piston is hydraulically translated by pressurized engine oil from the internal combustion engine. An electronically controlled solenoid valve controlled by an engine or vehicle controller selectively controls the flow of engine oil for piston actuation. Thus the speed of the fan can be controlled based on various engine or vehicle operating parameters.

Abstract: A folding chair has a height adjustable seat whose height is controlled by a pneumatic cylinder having locking springs is seated inside each of the two tubular front legs of the chair. A trigger mechanism allows the user to release the locking aspect of the springs, adjusting the height of the seat before locking the spring length again. The chair is supported by a pair of cylindrical sleeves that move up and down the front legs and that are connected by a seat stop bar that maintains the seat in a position ready for use because it is contacted by the straight rear edge of a pair of gussets connected to the sides of the seat. The chair seat pivots upward into a storage position through a pair of hollow pins connected to fittings at the top of the pneumatic cylinders and that move up and down the front legs within an elongated slot cut into each front leg.

Abstract: An exercise apparatus combining a stationary bike and upper body extremity hand cycle, includes an upper hand crank assembly rotatable under a resistance load for upper body conditioning and a lower foot crank assembly rotatable under a resistance load for lower body conditioning. The upper hand crank assembly and lower foot crank assembly are independently connected to the resistance load through respective upper and lower driving belts. Either an upper clutch or lower clutch, communicating with the upper or lower crank assemblies respectively, selectively engages the driving belts to drive the resistance load. The upper and lower crank assemblies are independent of each other, and each is operable to separately engage the resistance load to transfer the resistance load to the respective upper hand crank assembly or lower foot crank assembly.