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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Patent•
19 Oct 1979
TL;DR: A flexible paddle wheel as discussed by the authors is a wheel structure consisting of a pair of axially spaced wheels, having flexible rims, such as pneumatic tires, with pairs of radially spaced, transverse, flexible members extending between, and attached to, the rims.
Abstract: A flexible paddle wheel structure comprises a pair of axially spaced wheels, having flexible rims, such as, for example, pneumatic tires, with pairs of radially spaced, transverse, flexible members extending between, and attached to, the rims. A flexible membrane extends between the transverse members in each pair to form a flexible paddle. The wheels can tilt relative to each other and the whole structure can be arranged to be lifted and lowered.
9 citations
Patent•
16 Apr 1968
TL;DR: In this article, a paddle is mounted by resilient rods 68 in blocks 64 mounted on a tension rod 56 which gives the roller an initial curvature prior to application of the load.
Abstract: 1,187,326. Rollers; vibration dampers. MOUNT HOPE MACHINERY Ltd. 21 May, 1968, No. 24055/68. Headings F2S and F2U. Vibration of a heavy roller comprising a stationary hollow axle 10 carrying a rotatable sleeve 12 on fluid bearings 14 or, Fig. 3 (not shown), on roller bearings (76), is damped by a paddle 70 resiliently mounted in the hollow axle. As shown, the paddle is mounted by resilient rods 68 in blocks 64 mounted on a tension rod 56 which gives the roller an initial curvature prior to application of the load. The axle is partially filled with water or other lubricating fluid and the paddle acts to pump the fluid through the clearance between itself and the axle to dampen vibration of the roller. The paddle is tuned to a natural frequency equal to that of the roller. Again, Fig. 5 (not shown), the paddle is mounted on a tension bar 56 at its centre only, tuning masses being mounted at its end. The paddle may be formed as a laminate, e.g. in the manner of a leafspring, and vibrational energy of the roller absorbed additionally by interfacial friction between the discrete layers of the laminated paddle as it vibrates.
9 citations
Patent•
04 Mar 1993
TL;DR: A wall-mounted table tennis paddle and ball holder made of a durable plastic or other suitable material, compact in size having a rectangular box shape with approximate outer dimensions of 23/4' in depth, 93/4" in height and 16" in length as mentioned in this paper.
Abstract: A wall-mounted table tennis paddle and ball holder made of a durable plastic or other suitable material, compact in size having a rectangular box shape with approximate outer dimensions of 23/4' in depth, 93/4" in height and 16" in length. It consists of: A paddle-shape (less handle) paddle housing wall, which houses up to 3 conventional size paddles at either end; A "ball in"≈11/2" dia. opening above paddle housing area, at either end of upper part of front panel, for returning of balls to holder; A retractable ball housing/dispenser. Said housing/dispenser, which will house up to 6 conventional size balls, is located vertically in the center of holder between the two paddle housing areas and between back wall and front panel. Said housing/dispenser having an upper and lower "stop" flange to prevent it from extending more than 21/2" below bottom wall of holder when set up for use. The said housing/dispenser being flush with the outer bottom wall of holder during shipping and storage.
9 citations