Abstract: The Rim Cover is a specially designed protective shield, specifically intended to protect valuable tire rims from the variety of chemicals typically used when detailing tires. The present invention can be manufactured of coated paperboard or heavy duty plastic material, or of any other suitable material. The Rim Cover can be produced in a variety of sizes appropriate for use with the various size rims available on the market and are a circular, convex unit.

Abstract: A plug connector (10) has a main body (12) and contact silos (14) with contact receiving passages (22) therein. The two contact silos (14) on either end are D-shaped to provide polarization of the connector with respect to a matable connector. The connector (10) further comprises a flange (40) extending along a top wall of the connector (10). The flange (40) extends beyond the main body (10) parallel to, but spaced from, the contact silos (14). The flange (40) provides a stop to prevent improper orientation of the connector (10) during mating with the matable connector.

Abstract: A lifting body moves relative to a fluid, thereby creating a vortex field in the fluid downstream of the lifting body. The lifting body has a predetermined lift distribution along the length thereof which enhances the velocity component of the fluid flow directed outwardly from the centroid of the vortex field to reduce the strength of trailing vortices. In a preferred embodiment, the lifting body is a wing with a perturbation proximate to the tip end of the wing planform trailing edge.

Abstract: The boundary layer of a fluid travelling in a mean-flow direction relative to a surface of a wall of a body is controlled by generating in the fluid a magnetic field B having flux lines along the surface of the wall and an electric current density J traversing the magnetic flux lines in the fluid to form a control region. The magnetic field B and the electric current density J create in the control region a force J.times.B that can stabilize or destabilize flow in the boundary layer. A plurality of such control regions can be arranged in an two-dimensional array of control tiles that are periodically actuated in a controlled, predetermined pattern at a critical frequency that provides boundary layer control over a given area.

Abstract: The boundary layer of a fluid travelling in a mean-flow direction relative to a surface of a wall of a body is controlled by generating in a near-wall region of the flow a magnetic field B having flux lines parallel to the surface of the wall and an electric current density J traversing the magnetic flux lines in the fluid. An electrolyte or other conductivity-enhancing material is introduced into the flow to provide an electrical conductivity gradient in the near-wall region. The magnetic field B and the electric current density J create in the fluid a force J.times.B having a component normal to the surface of the wall that because of the increased conductivity gradient near the surface can stabilize or destabilize flow in the boundary layer. Numerous aspects of the fluid flow and its interaction with the body can thus be controlled.

Abstract: An electrical contact has a tab provided in passage which extends through the contact. The tab is dimensioned to provide a barrier, past which solder cannot flow. Consequently, as the contact is mounted to a printed circuit board, the tab prevents the solder from wicking from the mounting portion to the mating portion.