Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS3562823 A
Publication typeGrant
Publication dateFeb 16, 1971
Filing dateJul 9, 1968
Priority dateJan 19, 1968
Also published asDE1684790B1
Publication numberUS 3562823 A, US 3562823A, US-A-3562823, US3562823 A, US3562823A
InventorsKoster Friedrich
Original AssigneeKoester Friedrich
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Wave producing machine,especially for swimming pools
US 3562823 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Feb. 16, 1971 KQSTER 3,562,823


WA &


f In ventor: FE/ y 715 8A- F. KOSTER 3,562,823

WAVE PRODUCING MACHINE; ESPECIALLY FOR SWIMMING POOLS Feb.16,197 1 Filed July 9. 1968 3 Sheets-Sheet 2 lnvenior:

Feb. 16, 1971 bsTg 3,562,823


In ventor Te/fir 725 526- United States Patent 01 fice 3,562,823 Patented Feb. 16, 1971 Int. Cl. E6411 3/18 US. Cl. 4172.16 3 Claims ABSTRACT OF THE DISCLOSURE A swimming pool equipped with oscillating blade means for actuating the water in the pool, in which said blade means is completely below the water level when the water is at rest while actuating means arranged outside the swimming pool are drivingly connected to said blade means for pivoting the same back and forth.

The present invention relates to a wave producing machine, especially oscillating blade equiped wave producing machine which by special means will be able to a major extent to recover the energy produced behind the oscillating blades. Wave producing machines of this type may be employed in particular for producing waves in swimming pools.

It is a well known fact that waves are produced by energy transfer after the water surface has been disturbed. In deep waters, the water particles in a. wave oscillate with a phase displacement on vertical circular paths and with this movement form the progressive wave contour. This movement continues to the bottom with the same wave length but, in conformity with an exponential law, with decreasing amplitude. In shallow waters, the circular paths deform so as to form ellipses, and in those layers which are close to the bottom, the waves become relatively slower and when hitting the bottom, the crests overturn to form breakers.

If it is desired artificially to produce waves of this type, it is necessary to disturb the water surface at a desired area, preferably in the vicinity of the edge of the swimming pool and, more specifically, at the rhythm of the desired wave frequency. The impact of the movement along a circle may be effected in a vertical, inclined, or horizontal movement. It may also be produced by an oscillating flap, an immersed body, a pump, or a propeller.

All of the above-mentioned possibilities have been available of heretofore. Specifically, for swimming pools, wave making machines have proved successful which operate with immersed bodies or oscillating blades. Both systems have their advantages and disadvantages. Immersed plunger installations require considerable space and mass and cause complications as to manufacture and servicing. Oscillating blade wave producing machines cause less difliculties with regard to construction and servicing but have a lower degree of efficiency because the emanation of energy can be exploited toward one side only. In operation, these last-mentioned wave producing machines cause considerable difliculties when it is desired to eliminate the Waves produced behind the blades.

It is, therefore, an object of the present invention to provide a wave producing machine operating with oscillating blades, which will overcome the above-mentioned drawbacks.

It is another object of this invention to provide a Wave producing machine operating with oscillating blades, which will greatly increase the degree of efficiency of this type of machine.

These and other objects and advantages of the invention will appear more clearly from the following specification in connection with the accompanying drawings, in which:

FIGS. 1, 2 and 3 respectively illustrate a cross-section through a swimming pool with the oscillating blades occupying different positions, in conformity with the different wave outlines produced thereby; and

FIGS. 4, .5 and 6 respectively illustrate in side view, top view, and end view the arrangement of the oscillating blades and the driving mechanism therefor.

The wave producing machine according to the present invention is characterized primarily in that the oscillating blades known per se end below the water surface and thus permit a superimposing of the waves sent into the pool by the oscillating blades, with the waves produced behind the blades and reflected by the wall of the swimming pool. In order to be able to recover the energy flowing off toward the rear, the present invention provides that behind the oscillating blades there is built up a standing or stationary wave which oscillates with the same frequency. This wave is built up by arranging the center point of the oscillating blade by approximately one-half of the wave length in front of the reflecting pool wall.

In order to make such oscillating wing-equipped wave producing machine particularly safe in operation, the bearings for the oscillating blades are, in conformity with the present invention, arranged outside the water-containing pool, The axes of the oscillating blades are sealed relative to the swimming pool by stuffing-boxes. The thus provided bearing arrangement for the oscillating blades makes it possible to arrange the drive for the oscillating blades adjacent to the latter, and furthermore permits a favorable use of space, particularly in swimming pools in bathhouses without the necessity of providing elevated structures for receiving parts of the wave producing machine.

Referring now to the drawing in detail, FIG. 1 shows the oscillating blade a in a position in which it has moved beyond its vertical position in the direction toward the rear wall b of the swimming pool. The crest of the wave produced behind the oscillating blade has reached the rear wall b of the swimming pool.

According to FIG. 2, the wave has been reflected by the rear wall I) of the pool and now moves toward the oscillating blade :1. With the position of the oscillating blade as shown in FIG. 2, the reflected wave in its mass has reached the oscillating blade and, due to the fact that the oscillating blade ends below the stationary water level d, is able to join the wave produced in front of the oscillating blade.

According to FIG. 3 the wave going downwardly into the pool has been superimposed upon the wave reflected by the wall b and both waves have been joined to form a large wave moving in the direction toward the swim ming pool proper.

FIGS. 4 and 6 show the oscillating blade a which ends below the resting water level d and is journalled in the bearings e located outside of the water-containing pool. The shaft supporting the oscillating blade is sealed relative to the pool by stuffing-boxes f. The driving mechanism g is arranged adjacent the oscillating blades at the level of the bottom of the swimming pool. A manually operable adjusting device h (FIG. 5) makes possible a change in the angle of oscillation of the oscillating blade.

It is, of course, to be understood, that the present invention is, by no means, limited to the particular construction and arrangement shown in the drawings, but also comprises various modifications, the invention being determined by the scope of the appended claims.

What I claim is:

1. In combination with a swimming pool having a front wall and a rear wall: fixed oscillating blade means with upper and lower edges both arranged completely below the desired water level when said swimming pool is filled with water to said level and the water is at rest, the pivot axis of said blade means being located fixedly at the lower edge thereof and thus being spaced from said rear wall by approximately one half the wave length of the waves to be produced for substantially resonant operation whereby water above the upper edge can pass unhindered thereabove while the water is additionally accelerated to strengthen waves in deeper water, and actuating means arranged outside said swimming pool and drivingly connected to said blade means for pivoting the same back and forth.

2. An arrangement in combination according to claim 1, which includes bearing means arranged outside said swimming pool and pivotally supporting said resonantly oscillating blade means.

3. An arrangement in combination according to claim 1, in which said actuating means is arranged laterally of said resonantly oscillating blade means.

References Cited UNITED STATES PATENTS 490,484 1/1893 Mackaye 4172.16 586,983 7/1897 Wharton, Jr. 4-172.16 1,181,406 5/1916 Potter 4172.16 1,536,875 5/1925 Bowen 4172.16X 1,871,215 8/1932 Keller et a1. 4--172.16 2,002,043 5/1935 Price 4-172.16 2,056,855 10/1936 Herz 4172.16

WILLIAM F. ODEA, Primary Examiner H. K. ARTIS, Assistant Examiner US. Cl. X.R. 6 l1

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3913332 *Aug 30, 1973Oct 21, 1975Arnold H ForsmanContinuous wave surfing facility
US3973405 *Oct 30, 1975Aug 10, 1976Societe Generale De Constructions Electriques Et Mecaniques (Alsthom)Surge generators of the plunger type
US3981612 *Jun 27, 1975Sep 21, 1976Charles BungerWave Producing apparatus
US4062192 *Feb 18, 1975Dec 13, 1977Offshore Technology CorporationMethod of and mechanism for generating waves suitable for surfing
US4142258 *Aug 27, 1976Mar 6, 1979Klaus SchironSwimming pool with wave generating installation
US4253202 *Aug 10, 1979Mar 3, 1981Forbes NorrisAutomatic adjusting wave gutter for swimming pools
US4406162 *Jul 2, 1981Sep 27, 1983Seasom Controls LimitedApparatus for creating waves in a body of liquid
US4522389 *Aug 16, 1982Jun 11, 1985Coinaqua LimitedParticulate surface sports track surface and method for reconditioning such track surface
US4783860 *May 26, 1987Nov 15, 1988Canadian Patents And Development LimitedCombined flapper and piston motion wave board module
US4976570 *May 15, 1986Dec 11, 1990Water Parks, Inc.Apparatus and method for generating waves in a body of water
US5171101 *Nov 15, 1991Dec 15, 1992Light Wave, Ltd.Surfing-wave generators
US5236280 *Sep 4, 1990Aug 17, 1993Blade Loch, Inc.Method and apparatus for improving sheet flow water rides
US5271692 *Mar 4, 1992Dec 21, 1993Light Wave, Ltd.Method and apparatus for a sheet flow water ride in a single container
US5401117 *Apr 1, 1992Mar 28, 1995Lochtefeld; Thomas J.Method and apparatus for containerless sheet flow water rides
US5421782 *May 20, 1993Jun 6, 1995Light Wave, Inc.Action river water attraction
US5536210 *Jan 28, 1994Jul 16, 1996Barber; Jerry L.Amusement apparatus
US5628584 *Mar 3, 1995May 13, 1997Lochtefeld; Thomas J.Method and apparatus for containerless sheet flow water rides
US5667445 *Jun 5, 1995Sep 16, 1997Light Wave Ltd.Jet river rapids water attraction
US5766082 *Jun 28, 1996Jun 16, 1998Lochtefeld; Thomas J.Wave river water attraction
US5899633 *Apr 9, 1997May 4, 1999Lochtefeld; Thomas J.Method and apparatus for containerless sheet flow water rides
US5899634 *Oct 22, 1996May 4, 1999Light Wave, Ltd.Simulated wave water sculpture
US6319137Jun 13, 2000Nov 20, 2001Light Wave, Ltd.Containerless sheet flow water ride
US6460201 *Nov 16, 2001Oct 8, 2002Thomas J. LochtefeldMethod and apparatus for controlling break points and reducing rip currents in wave pools
US6716107Nov 16, 2001Apr 6, 2004Light Wave, Ltd.Containerless sheet flow water ride
US6738992Sep 16, 2002May 25, 2004Thomas J. LochtefeldMethod and apparatus for controlling break points and reducing rip currents in wave pools
US6920651 *Jun 5, 2003Jul 26, 2005Michael Kevin RobertsSurfing ring wave pool for generating multiple simultaneous endless traveling waves looping around a center island
US6928670Dec 16, 2002Aug 16, 2005Light Wave Ltd.Moving reef wave generator
US7666104Mar 8, 2004Feb 23, 2010Light Wave, Ltd.Water ride attraction
US7950875May 21, 2008May 31, 2011Benham Roger AWater feature device
US8496403May 28, 2009Jul 30, 2013Thomas J. LochtefeldWave pool with moving reef wave generator extension and counter current
US9144727Feb 1, 2013Sep 29, 2015Thomas J. LochtefeldMethod and apparatus for adjusting and stabilizing a wave generator traveling through a body of water
US9457290 *Jan 30, 2012Oct 4, 2016Kenneth Douglas HillWave simulator for board sports
US9463390Oct 30, 2014Oct 11, 2016FlowriderSurf, Ltd.Inflatable surfing apparatus and method
US9649569 *Aug 30, 2016May 16, 2017Kenneth Douglas HillWave simulator for board sports
US20040245780 *Jun 5, 2003Dec 9, 2004Roberts Michael KevinSurfing ring wave pool for generating multiple simultaneous endless traveling waves looping around a center island
US20050047869 *Mar 8, 2004Mar 3, 2005Lochtefeld Thomas J.Containerless sheet flow water ride
US20050286976 *Jun 27, 2005Dec 29, 2005Lochtefeld Thomas JMoving reef wave generator
US20090169305 *Nov 13, 2008Jul 2, 2009Lochtefeld Thomas JMethod and apparatus for varying water flow for stationary sheet flow water rides
US20100000014 *May 28, 2009Jan 7, 2010Lochtefeld Thomas JWave pool with moving reef wave generator extension and counter current
US20100124460 *Nov 15, 2008May 20, 2010Phillip James FricanoSilo utilized for water containment and release for the purpose of wave generation
US20120201605 *Jan 30, 2012Aug 9, 2012Kenneth Douglas HillWave simulator for board sports
US20170043267 *Aug 30, 2016Feb 16, 2017Kenneth Douglas HillWave simulator for board sports
USRE39171 *May 4, 2001Jul 11, 2006Light Wave, LtdSimulated wave water sculpture
U.S. Classification4/491, 405/79, 472/128
International ClassificationE21D11/00, E04H4/00
Cooperative ClassificationE04H4/0006, E21D11/00
European ClassificationE21D11/00, E04H4/00A