Abstract: An anti-backlash device for preventing backlash derived from a moving load on a screw used in converting rotary motion into linear motion, the anti-backlash device comprising: a cylindrical pressure actuator integrally formed with a helical thread and axially mounted on the screw; a cradle integrally formed with a helical thread and internal cradle threads, the cradle being mounted exterior to and in mechanical contact with both the cylindrical pressure actuator and the screw, and a preloading means comprising a wave spring and a retainer mounted in the cradle.

Abstract: An anti-backlash device for preventing backlash derived from a moving load on a screw used in converting rotary motion into linear motion, the anti-backlash device comprising: a cylindrical pressure actuator integrally formed with a helical thread and axially mounted on the screw; a cradle integrally formed with a helical thread and internal cradle threads, the cradle being mounted exterior to and in mechanical contact with both the cylindrical pressure actuator and the screw, and a preloading means comprising a wave spring and a retainer mounted in the cradle.

Abstract: A portable beverage preparation device and system for making brews, mixes, and potions on demand by selectively introducing and mixing predetermined quantities of at least one stored, edible, beverage preparation confined in at least one sealed chamber into a portable beverage container containing a predetermined volume of a potable base liquid and having a dispenser means for introducing the at least one beverage preparation into the potable base liquid; wherein the drink container and the at least one sealed chamber are in close physical proximity to each other and separated by at least one thin membrane which, when inwardly perforated by the dispenser means, introduces the at least one beverage preparation into the base liquid. The system of the invention further provides a brewing element and a portable heating unit, the heater element of which fits into the beverage container for heating the liquid.

Abstract: A portable beverage preparation device and system for making brews, mixes, and potions on demand by selectively introducing and mixing predetermined quantities of at least one stored, edible, beverage preparation confined in at least one sealed chamber into a portable beverage container containing a predetermined volume of a potable base liquid and having a dispenser means for introducing the at least one beverage preparation into the potable base liquid; wherein the drink container and the at least one sealed chamber are in close physical proximity to each other and separated by at least one thin membrane which, when inwardly perforated by the dispenser means, introduces the at least one beverage preparation into the base liquid. The system of the invention further provides a brewing element and a portable heating unit, the heater element of which fits into the beverage container for heating the liquid.