Paddle

About: Paddle is a research topic. Over the lifetime, 5649 publications have been published within this topic receiving 28389 citations.

Swimmer training paddle

Abstract: A swimmer's hand paddle (10) in the form of a rigid planar member (11) has a mitten-shaped surface area, larger than the human hand and wider in the palm area than in the area of the middle finger, and has an irregularly-shaped aperture (20) of a width approaching the width of the hand positioned at a sensitive area of the palm when the hand is properly positioned on the paddle (10). From one end of a proximal curved wrist edge (13) to a point beyond the end of the thumb (12a), the thumb side edge (15a) closely approaches the outer edge of the thumb and then curves inwardly and merges with a sharply curved distal end (14), whereas the little finger side edge (16) extends with flared curvature from the distal end to the other end of the curved wrist edge. The area of the little finger side (18) of the paddle (10) is larger than the thumb side area (17), and has a curved finger side edge for reducing the resistance to water of the little finger side during the routine of a swimming stroke. The user's hand is attached to and positioned on the paddle (10) by sections of rubber tubing (26, 30, 31) pulled through sets of perforations, one set (27, 29) positioned near the wrist edge and another set (34, 35, 38, 39) positioned at the approximate location of the base of the user's fingers.

Cellular phone shield

Abstract: A shielding device used on hand-held cellular phones comprises a substantially rectangular shield which extends adjacent to the antenna. A downwardly extending slide arm portion of the shield terminates in a substantially pointed end surface formed by the outer edge of the shield sloping inwardly to engage the inner edge of the slide arm, said outer edge having a notch on the exterior surface thereof. The device also includes a paddle arm portion extending perpendicular to the shield area and then downwardly to terminate in an enlarged paddle engaging the rear of the phone. The shield is mounted to a hand-held cellular phone with the shield area extending vertically upward adjacent to the antenna and the paddle arm extending over the top of the phone and terminating in the rear paddle and the paddle arm extending over the top of the phone. The shield is held in place by an O-ring which surrounds the phone and fits in the notch in the slide arm. The shield comprises polished aluminum while the slide arm and paddle arms are coated with plastic vinyl to enhance friction and prevent scratching of the phone surface. The shielding area deflects a majority of the radiation and simultaneously absorbs whatever is not deflected while physically blocking the user from actual contact with antenna when in use.

Incorporating a gas in candy

Abstract: This invention relates to a method of incorporating a gas in a candy glass. The incorporation or mixing of the gas takes place in a vessel containing hot candy (sugar) melt under superatmospheric pressure. The melt is stirred within the vessel using a rotatably mounted shaft with paddle blades attached to it and is mounted on the vertical axis of the vessel. Said shaft has a hollow interior with sidewall openings at each end. The level of the melt in the vessel envelops the paddle blades and the lower opening of said shaft. Thus, when the gas is introduced at the top of the vessel, it enters the shaft at the top opening and exits at the bottom opening and is dispersed within the melt by the rotating paddle blades.

Fluid forces on kayak paddle blades of different design

Abstract: Three kayak paddle blades of different design (Conventional, Norwegian, Turbo) were tested in a low-speed wind tunnel at a maximum chord Reynolds number of Re = 2.2–2.7 × 105 (corresponding to speed through water of ≈1 m/s). The mean drag force and side force acting on each blade were measured, as the yaw and pitch angles were varied. The results were compared with those recorded for a finite rectangular flat plate of similar area and aspect ratio. For zero pitch angle of the blades, the results indicate that the drag coefficient was mostly independent of the blade design as the yaw angle was varied between ± 20°, with only the Norwegian blade design displaying a marginally higher drag coefficient than either of the other two blades or the flat plate. Increasing the pitch angle to 30°, while maintaining the yaw angle at zero, resulted in a 23% reduction of the drag coefficient for the flat plate, but only a 15% reduction of the drag coefficients for the three blades. For all designs, the drag coefficient reduction followed a simple cosine relationship as the pitch angle or yaw angle was increased. The wind tunnel experiments revealed that the side force coefficients for all three paddle blade designs were entirely independent of the blade design and were indistinguishable from those recorded for a flat plate. In summary, the study showed that the nondimensional force coefficients are largely independent of the paddle blade design.

Integrated microfeature workpiece processing tools with registration systems for paddle reactors

Abstract: Tools having mounting modules with registration systems are disclosed. The mounting module includes positioning elements for precisely locating a processing chamber and a transport system that moves workpieces to and from the processing chamber. The relative positions between positioning elements of the module are fixed so that the transport system does not need to be recalibrated when the processing chamber is removed and replaced with another processing chamber. The processing chamber includes a paddle device for agitating processing liquid at a process surface of the workpiece. The paddle device, the processing chamber, and electrodes within the processing chamber are configured to reduce the likelihood for electrical shadowing created by the paddles at the surface of the workpiece, and to account for three-dimensional effects on the electrical field as the paddles reciprocate relative to the workpiece.