Topic
Paddle
About: Paddle is a research topic. Over the lifetime, 5649 publications have been published within this topic receiving 28389 citations.
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01 Jan 2001
TL;DR: In this article, the authors show that the center of simultaneous turning of the airframe is the same as the centre of curvature of the mass center's track, which is true only when the aircraft is in a steady state turning and the turning angle of the nose wheel is not given in advance.
Abstract: The model of aircraft's ground motion is “operational”,where the airframe has six degrees of freedom. As long as the pilot's command, the paddle's displacement, for example, is given, the model can find out the motion of both the airframe and nose wheel, and the interaction between them. The non sliding model of tires is applied but no assumption of airframe's motion is adopted. The turning angle of the nose wheel is not given in advance. The functions of tire force versus nose wheel's turning angle are no longer needed while the tire rolling coefficients are employed. There are assumptions about aircraft's ground motion; one of those widely used is “the center of simultaneous turning of the airframe is the same as the center of curvature of the mass center's track”. The research in this paper reveals that this is true only when the aircraft is in a steady state turning.
11 citations
Patent•
26 Jan 2004
TL;DR: A vacuum pickup device for handling semiconductor wafers and interleaf separators comprising a generally flat paddle member having a pickup surface and a planar top surface is described in this article.
Abstract: A vacuum pickup device for handling semiconductor wafers and interleaf separators comprising a generally flat paddle member having a pickup surface and a planar top surface, a means for drawing air through an orifice in the paddle which creates a first vacuum of a predetermined magnitude on the pickup surface and directing the air over the top surface thereby creating an additional second vacuum at the periphery of the paddle to provide an additional lifting force gently supporting the wafer on the pickup surface whereby a low vacuum is distributed over a wide area to provide a good uniform gentle more even lifting force.
11 citations
Patent•
13 Jul 2000
TL;DR: In this article, the authors describe an automatic beverage frother, which includes a lower housing assembly (100) having a motor (160) coupled to a gear train, which rotates about the longitudinal axis of the container in opposite directions.
Abstract: The invention relates to an automatic beverage frother (10). The beverage frother includes a lower housing assembly (100) having a motor (160) coupled to a gear train. The gear train may be removeably coupled to an upper paddle group (460) and a lower paddle group (410) disposed within a container (630). Each paddle group rotates about the longitudinal axis of the container in opposite directions. Within each paddle group is at least one paddle where each paddle is formed of a frame having a mesh (422) disposed within the frame.
11 citations
Patent•
20 Feb 1990
TL;DR: In this paper, a propulsion mechanism for a boat includes a boat body, a bar being laterally provided on the boat body; a sliding block being provided on and slidable along the bar; a paddle being pivotally disposed on the sliding block and being submerged in water on which the boat was floated; a restraining device being coupled to said paddle and being rotated in concert with the paddle; the restraining device limiting a rotatable range of the paddle, and two pulling rings being fixed to the sliding blocks.
Abstract: A propulsion mechanism for a boat includes a boat body; a bar being laterally provided on the boat body; a sliding block being provided on and slidable along the bar; a paddle being pivotally disposed on the sliding block and being submerged in water on which the boat body is floated; a restraining device being coupled to said paddle and being rotated in concert with the paddle; the restraining device limiting a rotatable range of the paddle; and two pulling rings being fixed to the sliding block. The sliding block is drawn to move laterally and reciprocally when the pulling rings are alternatively and reciprocally pulled by a user, so that the paddle moves relative to the water and so that a reactive force is produced to propel the boat body.
11 citations
Patent•
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17 May 1996
TL;DR: In this article, a positive pressure operated control apparatus for lateral alignment of a continuous web of paper, plastic, textiles and other materials which are being processed at windup, unwind, printing, coating, folding and slitting stations, or other intermediate points in the machine process.
Abstract: A positive pressure operated control apparatus for lateral alignment of a continuous web of paper, plastic, textiles and other materials which are being processed at windup, unwind, printing, coating, folding and slitting stations, or other intermediate points in the machine process. The apparatus includes an air source communicating with a combination sensor and controller which regulates a double-acting air actuator having an output member to move a web positioning assembly. The controller is regulated by a sensor paddle which is spring loaded to be maintained in engagement with the web edge. As the web wanders or becomes misaligned, the paddle moves in proportion to the misalignment and results in movement of a valve element relative to two orifice openings to provide differential air pressure proportional to error to operate the actuator to produce actuator movement proportional to the error to correct the position of the web.
11 citations