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 numberUS3612520 A
Publication typeGrant
Publication dateOct 12, 1971
Filing dateAug 5, 1969
Priority dateAug 5, 1969
Publication numberUS 3612520 A, US 3612520A, US-A-3612520, US3612520 A, US3612520A
InventorsQuong Y Chang, John W Stone
Original AssigneeLife Systems Engineering
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Rockable exercising platform for skiers
US 3612520 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent Appl. No. Filed Patented Assignee ROCKABLE EXERCISING PLATFORM FOR SKIERS Primary ExaminerRichard C. Pinkham Assistant ExaminerRichard Dror Attorney-Lyon & Lyon ABSTRACT: An exerciser for skiers in the form of a hollow bowl having a platform on which the skier strands; the outer surface of the bowl having a spherically shaped base portion 5 claimsfi Drawing Figs and angularly related essentially conical portions which per- U.S. Cl 272/57 B, mit the skier to select angles at which the platform is tilted to 272/60, 27 2/57 A predetermine the intensity of the exercise; the bowl containing Int. Cl A631) 23/04 a fixed weight at its base portion to lower its center of gravity Field of Search 272/33 A, and a vertically adjustable weight to change the center of 57 A, 57 B, 60 gravity.

PATENTEBum 12 Ian 3,6 1 2 520 Z JOHN M/ 5 TONE INVENTORS ATTORNEYS ROCKABLE EXERCISING PLATFORM FOR SKIERS BACKGROUND OF THE INVENTION The sport of skiing requires special development of muscles particularly in the feet, ankles and legs. This was recently indicated in an article appearing in the Nov. i968 issue of Skiing Magazine. It is desirable, in fact imperative, that a skier perform exercises to condition his muscles prior to the first ski runs of the season, or greatly increase his chance of serious injury. Few skiers have exposure to skiing conditions for the period necessary to develop the muscles by gradually increasing exercise on the ski slope; consequently, special apparatus is required. Such apparatus has been developed; however, the more successful apparatus has been expensive and confined to gymnasiums. Attempts have been made to provide inexpensive portable exercising devices for home use, but these have been deficient for the proper progressive development of the muscles.

A type of toy has been developed, as exemplified in US. Pat. No. 3,024,021, which consists in a platform placed on a ball or portion thereof'so that one may stand on the platform and rock. Such devices while suitable as atoy and a general purpose exerciser, fails to accomplish the objectives of a skier's exerciser and particularly does not provide for exercise of progressively increased intensity. I

SUMMARY OF THE INVENTION The present invention is directed to an exerciser particularly adapted for the muscular conditioning of skiers, and is summarized in the following objects:

First, to provide a simple and inexpensive exerciser whereby a skier may initiate his exercise at low intensity, then progressively intensify the exercise as his muscles strengthen; that is, the skier may control the intensity of his exercise to correspond to the condition of his muscles.

Second, to provide an exerciser for skiers on which the skier may simulate the various maneuvers he is required to perform when on skis.

Third, to provide an exerciser for skiers which is in the form of a bowl having a specially contoured outer surface defining angularly related conical areas so that the device may be tilted to present a selected area to the floor.

Fourth, to provide an exerciser for skiers as suggested in the preceding object which contains a fixed weight and an adjustable weight so that the center-of-gravity may be adjusted to the needs of the user.

DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of the exerciser.

FIG. 2 is a side view thereof.

FIGS. 3, 4 and 5 are other side views thereof, showing the exerciser in different angular positions.

FIG. 6 is an enlarged sectional view, taken through 6-6 of FIG. I.

SPECIFICATION The exerciser includes a base member 1, preferably formed of plastic material and bowl-shaped in contour. Externally, the

- base member 1 forms a spherical apex portion 2, the periphery of which merges into a first conical area 3, which in turn, merges into a second conical area 4 of greater slope, the areas forming therebetween a narrow transition zone 5.

The outer periphery of the base member forming the second conical area 4 is joined to an annular internal reinforcing rib 6, which in turn, is joined to an upwardly directed marginal rim 7. A platform 8 also preferably formed of plastic material, and having an annular groove, is received on the marginal rim 7 and secured thereto by cement 9. The outer periphery of the second conical area, the juncture between the internal rib 6 and the marginal rim 7, and the lower peripheral corner of the platform 8, designated respectively 10, 11 and 12, define a third conical area.

Centrally located in the base member 1 is a fixed weight 13, which may be secured thereto by a cement 14. The fixed weight 13 supports a vertically extending stud bolt 15, which receives an adjustment nut 16. The adjustment nut may be provided with friction producing means 17 so as to prevent free rotation. Molded around, or otherwise secured to the adjustment nut 16, is a disk-shaped movable weight 18. The platform 8 is provided with a central aperture 19 to expose the nut 16 for adjustment.

Cemented to the upper surface of the platform 8 is a sheet of material 20, having a high friction surface which may include suitable ridges and grooves. Alternatively, the surface of the platform 8 may be finished to provide a high friction surface.

Operation of the exerciser is as follows:

The user stands on the platform 8 in such a manner as to balance thereon, with the spherical apex portion 2 in engagement with an underlying floor surface. By manipulation of his weight, the user may tilt the base member to the first conical area 3. He will sense the transition zone 5 if he causes the base member to move from the first conical area 3 to the second conical area 4, as shown in FIG. 4, and can with a little practice, avoid movement to the second conical area.

' By appropriate manipulation, the user may simulate various movements which are made when skiing. These include the following movements or actions:

Anticipation: Series of movements used to initiate a christieup-unweighting, an increase of forward lean, banking and a partial rotary (in the direction of the turn) motion of the hips, shoulders, arms and outside ski pole.

Blocking: The shoulders are used to supply the turning force and the muscles allowing the hips and legs to swivel around at the ankles must be contracted (or blocked) at the right time so that the torque generated by the shoulders is passed on to the feet and skis.

Counter-Rotation: This occurs when the shoulders and hips rotate in a direction opposite, or counter, to that of the feet and skis. Counterrotation usually occurs in conjunction with heel push.

Foot Swivel: A form of turning power where the strength of the lower legs is used to swing both ends of the skis so that they swivel or pivot around directly underfoot. This is often used to initiate parallel christies.

Heel Thrust: Using the toes or the shovels of the skis as pivot points, the heels can be thrust to either side to produce a powerful turning force.

Knee Crank: The knees, either singularly or together, can exert a strong turning force when pushed in toward the center of an intended turn.

Rotation: When any part of the body twists, or rotates, in the direction of the turn, it can influence the turn. Thus, there can be foot rotation, hip rotation, shoulder rotation, etc.

Steering: Snowplow and stem turns can be spoken of as steered turns because the strength of the legs and feet is used to steer the skis around.

Tip Thrust: By using the heels or the tail ends of the skis as pivots, the tips can be thrust or pulled to either side to induce a quick change of direction.

Turning Power: Any of the many sources of force used to initiate or continue a turning movement of the skis.

Twisting Angulation: A combination of counterrotation and angulation performed simultaneously. The result is often referred to as the comma or reversed shoulder position.

It will thus be seen that the user can perform a series of exercises, especially useful in practicing feet, ankle, leg and body coordination, and including heel thrust, foot swivel, tip thrust and combined displacement. More particularly, the user can, by confining the movement of the base member 1 to the spherical apex portion 2 and first conical area 3, limit the intensity of the exercise, and thus it serves to begin muscular conditioning. Following initial muscular conditioning, the user may increase the intensity of the exercise by including the second conical area 4; that is, the base member may be tilted to the The adjustable weight 18, by effecting change in the center of gravity, changes the stability of the exerciser. More specifi 5 cally, if the weight is adjusted to its lower position, it is easier for the user to balance on the exerciser. As the weight is adjusted upward, greater skill is required in order to control the exerciser. As a result, the user can proceed initially, with the weight in its lowermost position, to manipulate the exerciser at different angles; then, repeat this with the weight raised to different levels until finally the weight is at its highest position. Of course, the sequence of weight adjustment and angles of tilt may be adapted to the needs and skill of the user.

The present embodiment of this invention is to be considered in all respects as illustrative and not restrictive.

We claim:

1. An exerciser for skiers, comprising:

a. a base member having an apex of spherical contour and a series of concentric angularly related conical surfaces of increasing slope;

b. and a substantially flat platform covering the entire base member to define the uppermost surface thereof and dimensioned to receive substantially only the feet of the user whereby the user, when standing on said platform,

may rock the base member to a selected conical surface to control the intensity of his exercise, said apex of spherical contour being of a diameter that is a minor portion of the diameter of said platform and centrally located therebelow whereby to be between the feet of a user standing on said platform.

2. An exerciser, as defined in claim 1, wherein:

a. said base member includes a fixed weight at its apex portion.

3. An exerciser, as defined in claim 1, wherein:

a. said base member is hollow and includes a centrally located weight and means for adjusting the position of the weight to move the center of gravity.

4. An exerciser, as defined in claim 1 for skiers, comprising:

a. a hollow base member having an apex of spherical contour and a series of concentric, angularly related surfaces defining conical areas of increasing slope for presentation to an underlying floor, said base member terminating in a nm;

b. a platform covering the base member and secured to said rim, the platform having an aperture for access to said base member;

c. and vertically adjustable weight means in said base member accessible for adjustment from the central portion of said platform.

5. An exerciser for skiers, as defined in claim 4, wherein said weight means includes:

a. a fixed weight secured in the apex region of the base member;

b. a screwthreaded post projecting upwardly therefrom;

c. and an adjustable weight carried by said post.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1712703 *Apr 19, 1923May 14, 1929Hudson William FAmusement and exercising device
US2804123 *Dec 7, 1954Aug 27, 1957Kling Lester ERocking and rotating toy
US2878858 *Mar 6, 1957Mar 24, 1959Barbara WinchesterBowl shaped play thing
FR568347A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3787047 *Oct 15, 1971Jan 22, 1974Brawn DSki motion simulating training device
US3912262 *Jul 17, 1973Oct 14, 1975Karl MickoGymnastic, recreational and instructional apparatus
US4076235 *Jul 30, 1975Feb 28, 1978Risberg Jr CarlEntertainment and exercise device
US4183521 *Jan 31, 1978Jan 15, 1980Kroeker Delbert RExercising device
US4191371 *Jan 16, 1978Mar 4, 1980Armer Leon JrBalancing apparatus
US4289306 *Oct 29, 1979Sep 15, 1981Thomas Ross TExercise wheel
US4509743 *Mar 7, 1983Apr 9, 1985Chatanooga CorporationBalance training apparatus
US4605224 *May 14, 1984Aug 12, 1986Saitama Kako Co., Ltd.Exercise apparatus
US4687198 *Jan 6, 1986Aug 18, 1987Smith Terry WRecreational platform
US4801140 *Mar 9, 1987Jan 31, 1989Bergeron Timothy JTherapeutic exercise equipment for the handicapped
US4998719 *Nov 29, 1988Mar 12, 1991Frantisek JahodaJudo training device
US5048823 *Aug 27, 1990Sep 17, 1991Bean John ABalance board
US5188578 *Jan 13, 1992Feb 23, 1993Voigt Bruce SSkiiing simulator and training device
US5203279 *Dec 11, 1991Apr 20, 1993Martin EversdykPuppy training device
US5415589 *Jul 16, 1993May 16, 1995Hall, Jr.; Rudolph V.Variable motion device
US6666802 *Nov 13, 2002Dec 23, 2003Aaron P. RasmussenRotary tilt exercise machine
US6979282Dec 10, 2004Dec 27, 2005Ingenious Designs LlcPortable foot operated exercise device
US7137938Jul 10, 2002Nov 21, 2006Gottlieb Marc SExercise device and method of using the same
US7374522Jul 30, 2005May 20, 2008Precor IncorporatedExercise device having a movable platform
US7537555Feb 22, 2008May 26, 2009Soletski Michael MOne-piece, lightweight extremity exercise device
US7713182Nov 6, 2007May 11, 2010Edison Nation, LlcExercise devices
US8202172 *Oct 2, 2009Jun 19, 2012Lejeune Francis EChild rocking toy
US9095738Dec 6, 2010Aug 4, 2015Reginald J. SenegalExercise apparatus
US20040009859 *Jul 10, 2002Jan 15, 2004Gottlieb Marc S.Exercise device and method of using the same
US20060040796 *Aug 23, 2004Feb 23, 2006Holloway Jennifer JStep/balance apparatus
US20070027009 *Jul 30, 2005Feb 1, 2007Precor IncorporatedExercise device having a movable platform
US20070298949 *Jun 22, 2006Dec 27, 2007Soletski Michael MLower extremity exercise device
US20080207410 *Dec 16, 2005Aug 28, 2008Enrico TacconiDevice for Rehabilitation of the Limbs and of the Trunk
US20110143896 *Dec 6, 2010Jun 16, 2011Level 10 Fitness Products LLC.Exercise apparatus
US20140162859 *Dec 6, 2013Jun 12, 2014Chih-Hung ChengResistance regulating balance board
DE10134688A1 *Jul 20, 2001Feb 6, 2003Thieme Sport GmbhDevice serving for movement therapy comprises a planar round surface for the user to stand on, a spherical section, and a transitional zone joining the planar surface to the spherical section
EP0088643A1 *Mar 10, 1983Sep 14, 1983Hakon Dr. LieBalance training apparatus
WO2006064055A1 *Dec 16, 2005Jun 22, 2006Enrico TacconiDevice for rehabilitation of the limbs and of the trunk
WO2008052546A1 *Oct 30, 2007May 8, 2008Wobblesmart InternationalBalancing device
WO2009141710A2 *May 20, 2009Nov 26, 2009Claudio Marco SalvatoreDevice for physical exercise and/or physiotherapy exercises
WO2009141710A3 *May 20, 2009Jan 14, 2010Claudio Marco SalvatoreDevice for physical exercise and/or physiotherapy exercises
U.S. Classification482/71, 482/146
International ClassificationA63B22/18, A63B21/06
Cooperative ClassificationA63B21/0004, A63B22/18, A63B21/06, A63B2022/0033
European ClassificationA63B21/00D, A63B22/18