Abstract: The golf training device includes a foot alignment strip generally in the form of an arrow that can be pointed towards a target. A ball alignment marker extends perpendicularly from an intermediate position along the foot alignment strip and can be pointed towards the golf ball. A hand alignment guide defines an arc that extends from the ball alignment marker to provide a visible cue that identifies a preferred path of movement of the hand through a golf swing. The shaft alignment line extend transversely across the hand alignment marker to identify preferred shaft positions at various points during a golf swing.

Abstract: The golf training device includes a foot alignment strip generally in the form of an arrow that can be pointed towards a target. A ball alignment marker extends perpendicularly from an intermediate position along the foot alignment strip and can be pointed towards the golf ball. A hand alignment guide defines an arc that extends from the ball alignment marker to provide a visible cue that identifies a preferred path of movement of the hand through a golf swing. The shaft alignment line extend transversely across the hand alignment marker to identify preferred shaft positions at various points during a golf swing.

Abstract: A ski is provided with an internal support structure configured to ensure adequate strength for the ski. The internal support structure is formed to define at least one internal cavity. An outer shell surrounds the internal cavity and the internal support structure and defines the exterior of the ski. The internal support structure may be formed from opposed halves assembled to one another. The internal support structure may include a plurality of outwardly extending positioning legs formed unitarily therewith for positioning the internal support structure within an injection mold cavity. The ski may further be provided with metal edges snapped into grooves formed on portions of the bottom surface adjacent the sides.

Abstract: A ballet ski is provided for achieving enhanced stability when a skier is stationary or moving slowly. The bottom surface of the ski has a planar elliptical portion centrally under the foot of the skier. Remaining portions of the bottom surface are convex from front to rear and convex from side to side. Thus, a skier can easily roll from the planar ellipse and into the curved portion to carry out selected ballet maneuvers. Preferably, the ski is formed from separate top and bottom components configured to form air pockets that reduce the weight of the ski. The ski may also include chamfers near the rear binding to enable a brake to rotate into the snow. Additionally, hook receiving apertures may be formed through the rear end of the ski. A pair of the skis may then be used with straps having hooks engageable in the apertures for conveniently suspending the skis in a carrying position.

Abstract: A ballet ski is provided for achieving enhanced stability when a skier is stationary or moving slowly. The bottom surface of the ski has a planar elliptical portion centrally under the foot of the skier. Remaining portions of the bottom surface are convex from front to rear and convex from side to side. Thus, a skier can easily roll from the planar ellipse and into the curved portion to carry out selected ballet maneuvers. Preferably, the ski is formed from separate top and bottom components configured to form air pockets that reduce the weight of the ski. The ski may also include chamfers near the rear binding to enable a brake to rotate into the snow. Additionally, hook receiving apertures may be formed through the rear end of the ski. A pair of the skis may then be used with straps having hooks engageable in the apertures for conveniently suspending the skis in a carrying position.

Abstract: A substantially rigid ski is provided to afford high degrees of maneuverability and stability. The bottom surface of the ski is convex from front to rear and convex from side to side. The ski has a maximum effective width substantially in line with the pivot point over which the skier's weight will be centered. The ski assumes a narrower effective width both forward and rearward of the pivot point and then assumes an intermediate effective width closer to the front and rear respectively. The narrower effective width can be achieved by a narrower actual width, a greater degree of convexity or by a combination of the two. The bottom surface includes well defined bottom side edges that are substantially parallel to the top surface of the ski. The sides of the ski are concave adjacent the bottom side edges.

Abstract: In an apparatus for a treatment of flowing media which causes heat exchange and mixing internal fittings are located within a housing, which internal fittings consist of tubes extending in the axial direction of the housing, each such tube containing a plurality of elbow-shaped tube portions connected by other tube portions, said tubes being arranged in parallel to one another with the connecting tube portions of adjacent tubes crossing one another.

Abstract: Styrene-containing polymers are produced by one- or multi-stage prepolymerization and subsequent continuous, one- or multi-stage main polymerization with final working up. In the main polymerization stage(s) the mixture is subjected simultaneously to a heat exchange and a static mixing procedure.