Appliance for practicing aquatic sports
First Claim
1. An appliance for practicing aquatic sports using gliding devices supported atop a turbulent, non-separated flow of water, comprising:
- a. an open water reservoir having a sloping bottom surface, surrounded by substantially vertical side walls, water being passed from a feed nozzle along the lower rim of said bottom surface upwardly to an overflow along the upper rim of said bottom surface;
b. apertures through the bottom surface and side walls of said reservoir at least in the regions of each boundary layer in which the upwards flowing portions of water are increasingly slowed down by friction, said apertures forming the mouths of discharge pipes for the discharge of portions of slowed down water;
c. additional apertures through the bottom surface and side walls of said reservoir at least in the regions of each boundary layer in which the upwards flowing portions of water are slowed down by friction, said additional apertures forming the mouths of feed pipes for feeding water at an increased flow rate substantially tangential to the direction of flow of said turbulent flow of water for accelerating portions of slowed down water;
d. means for connecting each of said apertures with a respective one of said additional apertures such that said apertures and said respective additional apertures form the mouths of a common pipe; and
e. means associated with said common pipe discharging portions of slowed down water through the first of said apertures and refeeding them at an increased flow through said respective additional apertures to other portions of slowed down water.
2 Assignments
0 Petitions
Accused Products
Abstract
In appliances for practicing aquatic sports with water flowing upwardly over a sloping bottom surface a premature breakdown of the flow caused by the accumulation of portions of water slowed down by friction at the boundary faces is prevented by at least partially removing said portions of slowed down water. This can be done by sucking off at least the increasingly portions of slowed down water which are preferably refed to a return pipe of the appliance. A further possibility provides that portions of slowed down water are accelerated by supplying water at an increased flow rate. Suction of the portions of slowed down water as well as the supply of water at an increased flow rate is particularly effected through apertures in the bottom surface in the regions in which the portions of water are particularly slowed down, i.e. above all in the regions in the vicinity of an overflow at the upper end of the sloping bottom surface.
114 Citations
6 Claims
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1. An appliance for practicing aquatic sports using gliding devices supported atop a turbulent, non-separated flow of water, comprising:
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a. an open water reservoir having a sloping bottom surface, surrounded by substantially vertical side walls, water being passed from a feed nozzle along the lower rim of said bottom surface upwardly to an overflow along the upper rim of said bottom surface; b. apertures through the bottom surface and side walls of said reservoir at least in the regions of each boundary layer in which the upwards flowing portions of water are increasingly slowed down by friction, said apertures forming the mouths of discharge pipes for the discharge of portions of slowed down water; c. additional apertures through the bottom surface and side walls of said reservoir at least in the regions of each boundary layer in which the upwards flowing portions of water are slowed down by friction, said additional apertures forming the mouths of feed pipes for feeding water at an increased flow rate substantially tangential to the direction of flow of said turbulent flow of water for accelerating portions of slowed down water; d. means for connecting each of said apertures with a respective one of said additional apertures such that said apertures and said respective additional apertures form the mouths of a common pipe; and e. means associated with said common pipe discharging portions of slowed down water through the first of said apertures and refeeding them at an increased flow through said respective additional apertures to other portions of slowed down water. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification