Abstract: Disclosed herein is a reciprocal drive for a hand powered vehicle including a first axle, connected to a propulsion lever that the occupant of the vehicle pushes and pulls in a rowing motion, a first and a second power gear mounted on the first axle, wherein the first and second power gears rotate in opposing directions when the user pushes and pulls the propulsion lever, a first and a second drive belt, wherein the first drive belt delivers propulsive force from the first power gear to a gear wheel when the user pushes the propulsion lever and the second drive belt delivers propulsive force from the second power gear to the gear wheel when the user pulls the propulsion lever, and a second axle, on which the gear wheel is mounted, which rotates a drive wheel of the vehicle.

Abstract: Disclosed herein is a scooter-type vehicle comprising at least one front wheel and at least two rear wheels, wherein power for forward motion is developed by the occupant of the vehicle pushing and pulling a propulsion lever, which also serves as the steering mechanism for the vehicle, in both directions. A novel inventive gearbox mechanism is contained in a small housing, which allows for the drive wheel, through the steering means, to be rotated fully 180 degrees, allowing backward motion of the vehicle as well.

Abstract: A portable assembly allows semiconductor wafer boats to be transported safely from one semiconductor processing device to another semiconductor processing device at low cost using a small amount of the fabrication area without the need for complicated automated systems. The portable assembly includes two hollow bodies, of which one body may be elevated electromechanically to the height of a cantilever oven opening. The elevation may be conducted manually or automatically. The upper body of the assembly contains a rotating drum which further includes four segmented cylinders, which store and queue the wafer boats. The lower body contains a safety shoe locking apparatus which allows the elevator mechanism to be activated only when the assembly is docked in the appropriate location. The assembly also contains storage areas for wafers in progress. The assembly is moved manually on a set of wheels and may be rotated about its axis.

Abstract: A portable assembly allows semiconductor wafer boats to be transported safely from one semiconductor processing device to another semiconductor processing device at low cost using a small amount of the fabrication area without the need for complicated automated systems. The portable assembly includes two hollow bodies, of which one body may be elevated by electromechanical means to the height of a cantilever oven opening. The elevation may be conducted manually or automatically. The upper body of the assembly contains a rotating drum which further includes four segmented cylinders, which store and queue the wafer boats. The lower body contains a safety shoe locking apparatus which allows the elevator mechanism to be activated only when the assembly is docked in the appropriate location. The assembly also contains storage areas for wafers in progress. The assembly is moved manually on a set of wheels and may be rotated about its axis.