AU629537B2 - Exercise devices - Google Patents

Description

629537 COMMONWEALTH OF AUSTRALIA PATENTS ACT 1952-69 COMPLETE SPECIFICATION

(ORIGINAL)

Class Application Number: Lodged: Form Int. Class Complete Specification Lodged: Accepted: Published: Priority Related Art: I I Name of Applicant: Address of Applicant: Actual Inventor: Address for Service: DAR PRODUCTS CORPORATION 110 Saint Paul Street, Title Building-Suite 702, Baltimore Maryland 21202, United States of America SCOTT CARUTHERS EDWD. WATERS SONS, 50 QUEEN STREET, MELBOURNE, AUSTRALIA, 3000.

Complete Specification for the invention entitled: EXERCISE DEVICES The following statement is a full description of this invention, including the best method of performing it known to us

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Ai EXERCISE DEVICES Field Of The Invention The present invention relates to exercise devices, and more particularly, to exercise devices intended for I the accelerated development and strengthening of a user's targeted muscle or muscles, as well as a method for the assembly arid production of the exercise devices.

9, I I 0 Background Of The Invention The use of specialized equipment and various r, mechanical apparatuses for strengthening muscles is .well known. Moreover, the desirability of providing a device which is capable of isolating and developing a specifically targeted muscle, one of the most common of rire which is the bicep, has also been long recognized.

However, one of the most troublesome problems I It presented with providing a device that can isolate and Sfully develop a muscle, such as the bicep, is that any sort of gripping and grasping action with the hand automatically employs the conjunctive muscles of the arm, including the forearm, tricep and deltoid. The same problem is encountered for the exercise and strengthening of other muscles in the body.

Unfortunately, each of the apparatuses and devices resorted to in the prior art for developing a specifically targeted muscle, such as the bicep, provide for some sort of handle which must be gripped and/or grasped by the user thereof. Examples of these devices are enumerated as follows: Vi -2- Inventor(s) 44 4 4 444 4 4 44 44" 44 .44: .4 44 *I 4 4 4 444 4 4 44 4 4 4 Fisher Heydrick Sandow Duffner Sandow Calvert Ferris Smith Winer Sun Collins, Li Stamm Wright Wright Wright Shin Baroi Wright Giordano Anderson Wright Schwartz Jenison Jr. et al Patent No.

259,752 D 26,418 654,097 714,463 1,229,658 1,316,683 1,749,632 1,918,142 3,231,270 D 215,057 D 221,874 D 223,843 D 242,865 D 244,628 D 244,629 4,029,312 D 264,625 4,361,324 D 267,737 D 268,437 D 273,030 D 274,283 4,627,618 4,695,051 1882 1896 1900 1902 1917 1919 1930 1933 1966 1969 1971 1972 1976 1977 1977 1977 1982 1982 1983 1983 1984 1984 1986 1987.

Year Issued 0* i! This gripping and/or grasping action required by each of these devices is a definite disadvantage, since it involves the use of conjunctive muscles which prevents isolation required for the total development of the targeted muscle.

More specifically, every piece of exercise equipment or mechanical apparatus heretofore resorted to in the prior art invariably contains one common I a i;

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-3detractive denominator inherent within its design.

Whatever else is intended whether barbell, dumbbell, or one of the various exercise machines designed for total fitness there exists some sort of handle which must be grasped in order to use the device. Quite clearly, one must hold onto a handle to make the device work. This action of holding the handle automatically and necessarily employs the conjunctive (adjoining) muscles. Such "helper" muscles actually take away from the isolation required for full development of any specifically targeted muscle.

This detractive denominator occurs because of the physiological structure of the human body. A precise interface of cardiovascular, neural-nervous system, respiratory, and muscular function is adequate to carry the average person through their normal daily activity.

However, this interface is simply not sufficient to create an above average (or dynamic) physique.

Combined with the time constraints that typically discourage regular exercise, the obvious result s a rather large population group composed of "ordinary" (somewhat less than splendidly developed) individuals.

Accordingly, it will be appreciated that there remains a need for an exercise device for strengthening a user's targeted muscle; wherein the device is capable of being utilized by the user, such that a forceful grip is not required by the user; and wherein the necessity for employing the user's conjunctive adjoining muscles is substantially reduced, thereby substantially reducing the tendency to detract from the development of the user's targeted muscle.

Summary Of The Invention Accordingly, it is an object of the present invention to provide an exercise device for d -4t

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Vr V strengthening a user's targeted muscle which is capable of being utilized by the user thereof, such that the necessity for employing the user's conjunctive adjoining muscles is substantially reduced, thereby substantially reducing the tendency to detract from the development of the user's targeted muscle.

While not limited thereto, it is another object of the present invention to provide such an exercise device for strengthening a user's targeted muscles, including the abdominal region and extending thereabove, such as the biceps, triceps, forearm, deltoids and the pectoral muscles.

It is yet another object of the present invention to isolate the development of a targeted muscle by substantially eliminating the normal requirement for using the adjoining conjunctive muscles, thereby substantially improving the development of the targeted muscle.

It is still yet another object of the present invention to provide such a weight training device which provides ready access to the weights disposed therein for selectively changing the weight of, and the resistance provided by, the device.

The devices of the present invention, by virtue of thei- unique configuration, virtually eliminate the assistance of conjunctive muscles during the performance of many regimen exercises. Consequently, the effect translates as an achievement ratio of approximately 2.5 to 1 to 3.5 to 1. This is accomplished in a manner unparalleled in the physical fitness field.

More specifically, the user is not required to grasp the device of the present invention. Rather, the device simply cradles the user's hand, and the device is so designed that the user's hand remains at all times in a comfortable and natural "at rest" position.

The device of the present invention cannot be grasped

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by a handle, because there is no handle to grasp. As a result, there is an accelerated rate of achievement, and less time is spent on exercise while deriving full benefit.

In a preferred embodiment, a device of the present invention weighing ten (10) pounds, when properly employed, has a beneficial effect roughly equivalent to the employment of a conventional twenty-five (25) to thirty-five (35) pound weight heretofore resorted to in the prior art.

It is a still further object of the present invention to provide a method of forming the exercise devices of the present invention.

In accordance with the teachings of the present invention, there is disclosed herein an exercise device that has a housing having a weight means disposed therein. The housing further has an opening formed therein substantially tangentially of the housing. The opening is bounded by a relatively-thin outer wall and an inner wall having respective convex and concave portions. The hand of the user may be inserted through the opening in the housing, such that the user's hand is disposed between the inner and outer walls, such that the palm of the user's hand rests substantially on the convex portion of the inner wall, and such that the heel of the user's hand rests substantially on the concave portion of the inner wall. In this manner, a forceful grip is not required by the user, and the necessity for employing the user's conjunctive adjoining muscles is substantially reduced, thereby substantially reducing the tendency to detract from the development of the user's targeted muscle.

Preferably, the weight means has a pair of opposite ends, and each of the opposite ends is joined to a respective diametrically opposed portion of the housing.

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i -6- Preferably, the inner wall has a convex outer surface; the outer wall has a concave inner surface and is disposed radially of the inner wall; and the internal wall comprises a radial wall joining the inner and outer walls beyond the opening in the device.

In a preferred embodiment, the exercise device is substantially spherical, and the opening is formed therein substantially tangentially thereof.

These and other objects of the present invention will become apparent from a reading of the following specification, taken in conjunction with the enclosed drawings.

Brief Description Of The Drawings i tI t C It Fig. 1 is a pictorial view of the exercise device of the present invention, illustrating one use of the device for strengthening the user's targeted muscle which, in this case, is the bicep.

Fig. 1A is a pictorial view of a conventional prior art dumbbell, illustrating its normal use.

Fig. 2 is a perspective view of a preferred embodiment of the exercise device of the present invention.

Fig. 3 is a side elevational view of the exercise device, with parts thereof broken away and sectioned, to show the positioning of the user's hand therein between the relatively thin-walled housing and the cylindrical weight means mounted in the housing.

Fig. 4 is a section view, taken along lines 4-4 of Fig. 3 and drawn to an enlarged scale, and showing the arcuate ribs between the complementary relatively thin-walled hemispherical housing portions.

Fig. 5 is a section view, taken along lines 5-5 of Fig. 2, and showing the manner in which the cylindrical weight means is mounted between the complementary ~1 S ,i it fl

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i: I housing portions.

Fig. 6 is a section view, taken along lines 6-6 of Fig. Fig. 7 is another section view, corresponding substantially to Fig. 5, but showing several "filler" or "dummy" weights disposed in the cylinder.

Fig. 8 is an exploded perspective view of the exercise device of Fig. Fig. 9 shows the positioning of the exercise device of the present invention upon a table (or other surface) so that the exercise device will not roll off the table.

Fig. 10 is a section view thereof, taken along lines 10-10 of Fig. 9, and drawn to an enlarged scale.

Fig. 11 is another perspective view of the exercise device of the present invention, showing the padding disposed within the housing for providing a cushion for the hand of the user during use of the device.

Figs. 12-20 are sequence views, illustrating the method for forming and assembling a preferred embodiment of the exercise device of the present invention.

Fig. 12 is a side elevation of the body portion of the casing for the weight means, wherein the body portion is folded into a substantially flat shape for shipment.

Fig. 13 is an end view of the body portion of Fig.

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Fig. 14 is a side elevation of the body portion of the casing, wherein the body portion is unfolded into a substantially'cylindrical shape for use thereof during manufacture of the exercise device.

Fig. 15 is an end view of the unfolded cylindrical body portion, corresponding substantially to Fig. 14.

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I :1 C"C"4~ -8i i," Fig. 16 is a perspective view of the cylindrical body portion with a cap inserted on one end thereof and further with weights being disposed therein.

Fig. 17 is a further perspective view of the cylindrical body portion having all the weights disposed therein, further showing the insertion of a cap on the other end thereof.

Fig. 18 is a perspective view of the cylindrical weight means being disposed in the respective concave inner recess of one of the hemispherical housing portions.

Fig. 19 is another perspective view of the other of the hemispherical housing portions, shown partially disposed over the other of the opposed ends of the cylindrical weight means.

Fig. 20 is still another perspective view, showing the hemispherical housing portions being assembled and almost completely covering the cylindrical weight means.

Fig. 21 is a longitudinal section of a second embodiment of the present invention, corresponding substantially to that of Fig. 5, but showing a pair of circular discs separated by a dowel rod to form the cylindrical weight means within the housing.

Fig. 22 is an exploded perspective view thereof.

Fig. 23 is a longitudinal section of a third embodiment of the present invention, corresponding substantially to that of Fig. 5, but showing a weighted sleeve to form the cylindrical weight mears within the housing.

Fig. 24 is an exploded perspective view thereof.

Fig. 25 illustrates how two of the exercise devices of the present invention may be used in combination with a telescoping bar therebetween to form an improved exercise device, the use of which is somewhat similar to that of a conventional barbell.

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i; i i ~i -9- Fig. 26 is a section view (with parts thereof in elevation) taken along the lines 26-26 of Fig. drawn to an enlarged scale, and showing the telescoping members of the bar.

Fig. 27 is a further section view, taken along the lines 27-27 of Fig. 25, drawn to an enlarged scale, and showing the coupling of one of the exercise devices of the present invention to the telescoping bar.

Figs. 28-35 schematically illustrate various examples for use of the exercise devices of the present invention for the development and improvement of respective targeted muscles.

Fig. 36 is an exploded perspective view of a fourth embodiment of the present invention, wherein the ends of the weight are removably secured to the housing portions by cap screws, respectively, and wherein the outer diameter of the weight may be changed to vary the weight of the exercise device.

Fig. 37 is a longitudinal cross-section of the weight means, taken along line 37-37 of Fig. 36 and drawn to an enlarged scale.

Fig. 38 is a perspective view of the embodiment of Fig. 36 in its assembled relationship, but with certain parts thereof broken away and sectioned, and further showing an alternate fastening means.

Fig. 39 is a partial cross-sectional view thereof, taken along the lines 40-40 of Fig. 38 and drawn to an enlarged scale, and showing the tongue-and-groove mating relationship of the two hemispherical housing portions or shells along their respective annular peripheries.

Fig. 40 is a first elevational view of one of the housing portions or shells, as viewed from the lines 40-40 of Fig. 36 and drawn to an enlarged scale.

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ii r Description Of The Preferred Embodiments With reference to Fig. i, there is illustrated the exercise device 10 of the present invention for i strengthening one of the user's targeted muscles (in this case, the bicep) such that a forceful grip is not required by the user. Such an arrangement substantially eliminates the necessity for employing the user's conjunctive muscles adjoining the bicep. In this manner, the tendency to detract from the development of the user's targeted bicep muscle is substantially reduced.

By comparison, and with reference to Fig. 1A, 3 there is illustrated the use of a conventional dumbbell DB for strengthening the user's targeted muscle (again, in this case, the bicep). In using these conventional devices, such as a dumbbell, the user must forcefully grip the handle of the dumbbell. This gripping action has the tendency to detract from the development of the user's targeted bicep muscle, thereby substantially reducing the efficiency of the device.

The same concept is equally applicable to other targeted muscles, besides the bicep, consonant with the teachings of the present invention.

With reference to Figs. 2-4, the exercise device includes a substantially-spherical relatively thin-walled housing 11 having a diametral axis designated at A. The housing II includes a pair of 4 j housing portions 11A and 1B joining at a common midplane B. Each of the housing portions 11A and 11B is preferably substantially hemispherical and identical to one another; moreover, the housing halves 11A and lIB are molded from a suitable plastic material, such as a polycarbonate having relatively high impact strength. However, it will be expressly understood and appreciated by those skilled in the art that the i -11present invention is not so limited.

With this in mind, the housing 11 has a cut-away portion 12 formed therein. The housing further has an opening 13 formed therein substantially tangentially of the housing 11 and communicating with the cut-away portion 12. Through this opening 13, and as shown more clearly in Fig. 3, the hand of the user may be inserted into the housing 11 for use of the exercise device The housing 11 includes a suitable keying means between the pair of hemispherical portions 11A and 11B, whereby the, hemispherical portions are retained together and form the substantially spherical housing 11. Preferably, and as shown more clearly in Fig. 4, this keying means includes an arcuate rib 14 formed on the peripheral edges of each of the housing portions S- 11A and 11B. These ribs 14 are complementary and are mated when the housing portions 11A and 11B are brought together to form the spherical housing 11. Thereafter, the edges of the housing portions L1A and 11B are glued, ultrasonically welded, or otherwise integrally joined with one another.

Each of the thin-walled housing portions 11A and 11B has a concave inner walled portion 15 forming a circular recess (for purposes hereinafter described).

With further reference to Figs. 5-8, the weight means-comprises a casing 16 disposed within the housing 11 and, preferably, substantially coincident with the diametral axis A of the housing 11 and at right angles to the common midplane B between the housing portions 11A and 11iB. The casing 16 has a body portion 17, within which disc-shaped weights 18 and/or "dummy" weights or "fillers" 19 are disposed. Preferably, the casing 16 is substantially cylindrical in shape.

However, it is to be understood that any suitable shape of the casing 16 may be employed (and other types of ballast may be employed other than the fillers 19)

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-12consonant with the teachings of the present invention.

The body portion 17 of the casing 16 further has a pair of opposed ends 20, each of which is preferably open.

VA cap 21 is disposed over each open end 20 of the f casing 16. The caps 21 aid in retaining the selected weights 18 and/or "fillers" 19 within the casing 16.

If desired, the caps 21 may be omitted entirely, with either (or both) opposed end portions 20 being r integrally sealed with a respective end wall, or with both ends 20 being left open.

Disposed in the casing 16 is the selected weights 18 and/or "fillers" 19 which are desired to be lifted by the targeted muscle. It is preferred that each Sweight 18 be shaped substantially coincident with the shape of the interior of the casing 16, and particularly the body portion 17 thereof. If, as in the preferred embodiment, the casing is substantially cylindrical in shape, then each weight 18 and/or "filler" 19, is preferably substantially disc-shaped in appearance and is sized to be received within the body portion 17 of the casing 16. The weights 18 may be fabricated from lead, steel, sand enclosed in plastic, or any other suitable material.

The "dummy" weights or "fillers" 19 may be utilized in place of any one or several of the weights 18. Such "fillers" 19 are preferably fabricated from a foam plastic (or other suitable) material having S! substantially identical, geometric proportions as the c weights 18 themselves. By substituting any one or several "fillers" 19 for the "real" weights 18, the weight of the device 10 being lifted by the targeted muscle (the bicep, for example) may vary from substantially zero (wherein all "fillers" 19 and no weights 18 are utilized) to a maximum value (wherein all weights 18 and no "fillers" 19 are utilized).

IIb -13- It is to be understood that any suitable weight or weights may be employed consonant with the teachings of the present invention. In a preferred embodiment, each of the weights 18 weighs 1.25 pounds. If the casing 16 is sized so as to receive eight such 1.25 pound weights 18 therein, then no "fillers" 19 are employed, Sand basically, a ten (10) pound weight is obtained for the exercise device; and if only four of the weights 18 are employed, then basically, a five pound weight is obtained, in which case four (4) fillers 19 are employed as shown more clearly in Fig.

7. In a preferred embodiment, the complementary i hemispherical housing halves 11A and lIB, together, weigh ten ounces (10 oz.) and, if desired, this weight i! may be taken into account in determining the weight of the overall exercise device 10. Moreover, if desired, a heavier weight may be chosen for the housing halves S11A and 11B.

While it is not necessary that such "fillers" 19 i be utilized, the use of such "fillers" 19 aids in ibe filling the interior of the casing 16, thereby e preventing the weights 18 disposed therein from shifting during the use thereof. If such "fillers" 19 were not provided, then the weights 18 disposed therein may be subject to lateral movements (or "shifting") within the casing 16 during use of the device As noted herein, each of the hemispherical housing portions 11A and 11B of the relatively thin-walled housing II is provided with a concave inner walled portion 15. Each of these concave inner portions receives and supports a respective opposed end 20 of the casing 16 therein, when the hemispherical housing portions 11A and 11B are joined to one another.

Preferably, each of the opposed ends 20 is further supported on a respective internal annular shoulder 22 formed in each of the concave inner portions k 1~ -r I' i -14- 6r 6 I I I 6.

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With reference again to Fig. 3, during use of the exercise device 10 of the present invention to strengthen the user's bicep (for example), the hand of the user is inserted through the opening 13 in the housing 11 and at least partially around the casing 16 radially thereof. In this manner, the user's hand is "cradled" in the hollow spherical housing 11, being at least partially disposed between the casing 16 and the relatively-thin wall of the housing 11. The palm of the user's hand is supported substantially against the convexly-formed inner walled portion 15A, such that the heel of the user's hand is supported substantially on the concave section 15B of the inner walled portion When utilized in this fashion, the user's hand at all times remains in a comfortable, natural "at rest" position. In such a manner, a forceful grip by the user is not required throughout the full range of motion of the exercise device 10, such that the necessity for employing the user's muscles which adjoin the bicep (the conjunctive muscles) is substantially reduced. As a result, the device 10 substantially reduces the tendency to detract from the development of the user's targeted muscle (in this case, for example, the bicep) With reference to Figs. 9 and 10, the outer surface of the housing 11 may, if desired, be truncated to form a flat surface 23 thereon. Provision of this flat surface 23 aids in preventing the device from rolling when the exercise device 10 is placed on a substantially flat surface, such as a table 23A as illustrated in Figs. 9 and With reference to Fig. 11, in a preferred embodiment of the exercise device 10, a padding 24 (or other suitable means) may be disposed within the housing 11 and between the casing 16 and the housing 11. In this manner, a cushion is provided for the hand 2b of the user which is disposed in the exercise device during use thereof. Additional padding may be disposed within the housing 11, opposite to the padding 24, if desired.

With reference to Figs. 12-20, there is illustrated the sequence of steps comprising the preferred method for assembling and forming the exercise device 10 of the present invention.

Preferably, each of the hemispherical housing portions 11A and lIB is molded from a relatively high-impact strength polycarbonate or other plastic or suitable material; and, as previously described, the hemispherical housing portions 11A and 11B are formed as mirror images of each other. If desired, the casing V 16 may be molded as a sleeve or tubing or else extruded; but in the preferred embodiment, the body portion 17 of the casing 16 comprises a flexible plastic sleeve which is folded flat for shipment (as shown more clearly in Figs. 12 and 13) and then is unfolded (as shows more clearly in Figs. 14 and into a substantially cylindrical shape for use in the fabrication and assembly of the overall exercise device The cylindrical body portion 17 is sold under the trademark "JETRAN" by SLM Manufacturing Corp. (of Somerset, Caps 21 are formed for each respective open end of the cylindrical body portion 17.

Referring to Figs. 16 and 17, the cylindrical body portion 17 of the casing 16 has a cap 21 disposed on S.one of the open opposed ends 20 thereof. The desired weights 18 and/or "fillers" 19 are then received within the cylindrical body 17. The other cap 21 is then disposed on the other of the open opposed end portions of the cylindrical body 17, whereby the weights 18 and/or "fillers" 19 are retained in the cylinder. If desired, these caps 21 may be either removably disposed over each respective end portion 20, whereby the r

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j -16weights 18 and/or "fillers" 19 are removably retained therein, or the caps 21 may be disposed over each respective end portion 20 and integrally secured in place therein, so that the weights 18 and/or "fillers" 19 are permanently retained therein. It is to be noted that the caps 21 may be disposed over each of the end portions 20 in the order described above or a cap 21 may be placed over each respective end portion 20 after the desired weight 18 and/or "fillers" 19 have been disposed in the cylinder 17.

Referring to Figs. 18-20, the assembled cylindrical casing 16 with the weights 18 and/or fillers 19 therein then has one of the opposed ends inserted into a respective concave inner portion 15 of one of the hemispherical housing portions 11A as shown more clearly in Fig. 18. There, the opposed end 20 is received on and abuts the internal annular shoulder 22, wherein the opposed end 20 of the cylindrical casing 16 is supported. Then the other of the opposed ends 20 is Sinserted into the other respective concave inner portion 15 of the other hemispherical housing portion 11B (as shown more clearly in Figs. 19 and 20). There, internal annular shoulder 22 therein, wherein the other t opposed end 20 of the cylindrical casing 20 is supported.

The respective hemispherical housing portions 11A and lIB are then aligned with one another and brought L together, as shown in Fig. 20, such that the arcuate ribbed edges 14 of the hemispherical housing portions 11A and lIB contact one another. The housing portions 11A and 11B are integrally joined together by a suitable adhesive, sonic or ultrasonic welding, or other suitable means. In this manner, a substantially spherical housing 11 having a single diametral axis and a single cut-away portion 12 is formed. The housing 11 -17further has a single opening 13 formed therein, substantially tangentially of the housing 11 and in communication with the cut-away portion 12 thereof for the hand of the user to be inserted during use, as herein described. If desired, the housing 11 could Shave a built-in cylindrical casing formed therein to receive the weights 18, etc., in which case a separate Scylinder 17 would not be necessary.

With reference to Figs. 21 and 22, constituting a first alternate embodiment 10' of the present invention, a pair of disc-shaped weights 18' are i separated by a cylindrical "dummy" block or dowel rod The outer diameter of the weights 18' and the dowel rod 25 remain substantially constant; however, the thickness of the disc-shaped weights 18' (and the length of the cylindrical dowel rod 25) may be changed to provide a heavier (or lighter) weight for the exercise device 10' This accommodates a range of exercise devices of different weights, thus facilitating an entire product line using the same housing members 11A and lIB. Like the other embodiments of the present invention, this achieves market expansion and penetration consonant with manufacturing standardization.

With reference to Figs. 23 and 24, constituting a second alternate embodiment 10'' of the present Kinvention, a weight 18'' comprising a single o r cylindrical sleeve is disposed between the respective housing portions 11A and 11B. The cylindrical weight 18'' has a central bore 26 formed therein. Thus, the cylindrical weight 18'' has a substantially constant length; but the bore 26 may have a variable diameter, thereby changing the effective weight thereof for accommodating a desirable product line of exercise devices l0''.

~1I1CIII i -18- With reference to Figs. 25-27, a pair of exercise devices of the present invention may be suitably coupled together to form a barbell type of device.

More specifically, an exercise device is carried on the respective ends of a bar 27. The bar 27 includes telescoping bar members 27A and 27B. Bar member 27A is preferably tubular and has an axial bore 28 to receive a reduced-diameter portion 29 of bar member 27B, as shown more clearly in Fig. 26. Bar member 27A has four circumferentially-spaced slots formed therein, and the outer diameter of bar member 27A is provided with external threads 31 radially of the slots 30. The reduced-diameter portion 29 of bar member 27B is slidably received in the axial bore formed in the tubular bar member 27A to the desired depth to adjust the length of the bar 27 to suit the convenience of the individual user. A clamping collar 32 is slidably carried by the bar member 27A and has an internal taper which is complementary to the external taper on the bar member 27A. The clamping collar 32 has internal threads 33 which engage the external threads 31 on the bar member 27A and exert a radially inwardly-directed pressure on the respective portions of bar member 27A intermediately of the circumferentially-spaced slots 30 formed thereon, thereby securely clamping the bar member 27A to the reduced-diameter portion 29 of the bar member 27B, and thereby retaining the bar 27 in its desired adjusted length. However, it will be appreciated by those skilled in the art that other means for adjusting the length of the bar 27 may be employed consonant with the teachings of the present invention.

With further reference to Fig. 27, the exercise device includes housing halves lC and 11D integrally joined together at their peripheral ribbed edges 14, respectively, and exercise device

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:;i j 3 1 1 t .,3 -19carries a sleeve weight 18A having a bore 26. Housing half 11D has an opening 34 to receive the bar member 27A, which is telescopically received concentrically within the sleeve weight 18A. The end of bar member 27A is threaded, as at 35, to cooperate with the internally-threaded boss 36 of a clamping disc 37.

Clamping disc 37 has a conical or tapered side surface 38 which wedges within a complementary internally-tapered or conical opening 39 formed in housing half 11C. The tapered surface 38 of clamping disc 37 also wedges against an annular chamfered surface 40 formed on the sleeve weight 18A, thereby Ssecurely retaining the weight 18A within the housing Shalves 11C and 11D. The outer surface 41 of clamping disc 37 is formed as a portion of a sphere (as shown more clearly in Fig. 27) so that in the overall assembly, the outer surface 41 of clamping disc 37 forms a smooth continuation of the spherical contours of the exercise device and, more particularly, its housing half 11C. The bar member 27A also carries a slidable locking collar 42 provided with a set screw 43 having a thumb-actuated portion 44, thereby retaining the exercise device on the bar member 27A. Bar member 27B has a similar connection with exercise device With this arrangement, the exercise devices may be quickly and conveniently removed from the bar 27 and replaced with exercise devices having different weights, as desired, so that the full range of the dual exercise devices is facilitated.

With reference to Figs. 28-35, the wide-ranging utility and application of the present to the n accelerated development of various targeted muscles of the user, besides the bicep illustrated in Fig. i, will be more readily appreciated. In Figs. 28-35, the full lines illustrate the natural "at rest" positions, while the broken lines illustrate the stressed positions during use of the exercise device of the present invention. Moreover, it will be appreciated by those skilled in the art that the respective representations of Figs. 28-35 are illustrative of the present invention and not limiting thereof.

With this in mind, Fig. 28 and 29 illustrate the use of the exercise devices of the present invention for primarily developing and strengthening the chest muscles, as the user lies on a bench 45. Figs. 30 and 31 illustrate the use of the exercise devices for primarily strengthening the shoulder muscles; Fig. 32 for the back muscles; and Figs. 33-35 are for the arm muscles. Fig. 30 is a front deltoid raise. Fig. 31 is a bent-over lateral raise; Fig. 32 is a one-arm latissimus row; Fig. 33 is an alternate bicep curl; Fig. 34 is a bicep concentration curl; and Fig. 35 is a tricep extension.

In each case, the user's specific targeted muscle is being developed and strengthened. Since it is not required to exert a firm grip or grasp on the improved exercise devices of the present invention, the use of the adjoining or conjunctive muscles is at least Q substantially reduced, if not eliminated altogether.

Thus, a smaller overall weight may be employed in the Iexercise devices, yet the beneficial effect will be substantially magnified; and, in a preferred embodiment, the improved exercise devices of the present invention have a beneficial effect which is substantially equal to a conventional weight of approximately 3.5 times the weight of the exercise device of the present invention. Viewed in another aspect, it will be appreciated that with the same exercise time period, the beneficial effect of the exercise devices of the present invention will be substantially enhanced over the use of the conventional

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devices of the prior art; or, conversely, a substantially reduced exercise time period may be employed to achieve approximately the same beneficial effect normally obtained by using a conventional device over a substantially larger exercise time period.

Moreover, with the same basic design, it is possible to manufacture and market a wide range of exercise devices of various respective weights. Thus, an entire product line has been facilitated for rapid development and market expansion and penetration, yet consonant with manufacturing standardization and relatively low-cost volume production methods.

Obviously, many modifications may be made without departing from the basic spirit of the above invention.

For example, the cylindrical casing 16 may be dispensed with (if desired) and complementary cylindrical casings could be integrally molded within the hemispherical housing portions 11A and 11B, such that the desired weights 18 (and/or fillers 19) may be received directly therein. Additionally, the housings for the exercise devices of the present invention may be made of a relatively soft or pliable material, thereby customizing the exercise devices for use by children or handicapped persons going through physical therapy.

Indeed, it is even feasible, consonant with the teachings of the present invention, to integrally cast or otherwise suitably form the exercise devices of a substantially solid material (with or without an internal ballast) yet having the same tangential opening and convexo-concave inner wall or surface to accommodate the user's hand without requiring the user to exercise a forceful grip.

Referring to Figs. 36-40, an alternate embodiment of the exercise devices of the present invention is illustrated. This embodiment has improved strength and flexibility, incorporates all of the desirable features h.

-22t t t of the previous embodiment, and yet facilitates standardized manufacture of the devices with relatively large variations in weight being readily accommodated.

In this alternate embodiment, the peripheral edges of the housing portions have a solid tongue-and-groove mating relationship with one another, and the respective housing portions are secured to respective opposite ends of the weight means.

Like the previous embodiments of the exercise devices described above, the exercise device 100 includes a housing 101 having a weight means disposed therein. Preferably, the wall thickness of this housing 101 is larger than the thickness of the housing wall of the previous embodiments.

As was described for the previous embodiments, a tangential opening 102 is formed in the housing 101.

This opening 102 is bounded by an outer wall 103 and by an inner wall 104. Inner wall 104 has a convex portion 105, and outer wall 103 has a concave portion 106. The hand of the user may be inserted through the tangential opening such that the user's hand is disposed between the inner and outer walls 103 and 104, respectively.

As previously described, the palm of the user's hand is disposed adjacent to the convex portion 105 of the inner wall 104, and the heel of the user's hand is disposed adjacent to the concave portion 106 of the outer wall 103. Thus, a forceful grip is not required by the user during use of the exercise device 100, thereby substantially reducing the necessity for employing the user's conjunctive adjoining muscles, which would (otherwise) have a tendency to detract from the development of the user's targeted muscle.

The opposite ends of the weight means 107 are removably secured to respective diametrically-opposed portions or shells 101A and 101B of the housing 101, and the peripheral annular edges of the respective -_LIII~-LII_- IIIYI

I

i Ii -23housing portions 101A and 101B are held together in a solid mating relationship.

Referring to Figs. 36 and 37, preferably the weight means 107 comprises a single solid weight having a pair of opposite ends 108 and 109. It is contemplated herein that this weight 107 (like the cylinder 16 of, for example, Fig. 8) will be substantially cylindrical in cross-section. However, other configurations of the weight means 107 are equally applicable consonant with the teachings of the present invention. Preferably, each of the opposite ends 108 and 109 of the weight 107 has a blind axial bore 110 formed therein. These opposite ends 108 and 109 are secured to the respective diametricallyopposed portions 101A and 101B of the housing 101 by a suitable fastening means.

The annular peripheral edges of the two molded hemispherical housing shells 101A and 101B join together along a common longitudinal midplane constituting the parting line of the housing 101, and the weight 107 is secured between the housing shells 101A and 101B transversely of the common longitudinal midplane therebetween.

The provision of the single weight 107 (secured directly to the housing portions 101A nd 101B) eliminates potential slippage and shifting of the weight in the housing 101. Thus, the exercise device 100 has increased stability during the use thereof.

Having a single weight also standardizes the manufacture of the exercise devices. The effective quantity of the weight 107 may be varied by varying the outer diameter thereof. In the previous embodiments (described above) the outer diameter of the weight means remains constant, with the effective quantity (or weight) of the weight means being varied by varying the inner diameter thereof. Altering of the r-:i i r; i L-- -24- *If inner diameter, or requiring the use of many more weights, is more expensive. In this respect, the use of the single solid weight 107 avoids manufacturing problems, provides standardization, and facilitates an improved product having greater reliability.

The means for securing each of the opposite ends 108 and 109 of the weight 107 to the respective diametrically-opposed portions 101A and 101B of the housing 101 includes a pair of cap screws 111 (or other suitable fastening means). Each of the cap screws 111 is directly inserted and received in a respective bore 110 in the weight 107. These cap screws 111 may be self tapping (as shown in Fig. 36); however, if desired, a screw 112 may cooperate with an expandable anchor 113 which is inserted into the bore 110, as shown in Fig. 38. The anchor 113 expands as the screw 112 is received in the bore 110 in the weight 107. The screws (111 or 112) pass through apertures 114 in the housing portion 101A and 101B, respectively.

In this manner, the housing portions 101A and 101B of the housing 101 are removably secured to the opposite ends 108 and 109, respectively, of the weight 107, such that the housing portions 101A and 101B are removably secured to each other.

Each housing portion 101A and 101B has a plurality of radially-extending respective strengthening ribs (or struts) 115 formed thereon, as shown more clearly in Fig. 40. These struts 115 extend between the inner (convex) wall 104 and the outer (concave) wall 103 of each housing half 101A and 101B. Additionally, cross ribs 116 join the struts 115 (being integrally molded therewith) to provide additional radial and circumferential strength to the housing portions 101A and 101B. These struts 115 and cross ribs 116 are desirable where a particularly heavy weight forty pounds or heavier) is disposed in the exercise device 100 (but may not be necessary where lighter weights are employed) Referring to Fig. 39, in addition to Fig. 36, the housing portions 101A and 101B are keyed together by a tongue-and groove arrangement, which permits the K peripheral edges of the housing portions 101A and 101B to mate solidly with one another. In this arrangement, the annular peripheral edge of one of the housing portions 101A (or 101B) has an annular tongue 117 formed thereon; and the annular peripheral edge of the other of the housing portions 101B (or 101A) has a complementary annular groove 118 formed therein and i sized so as to receive the tongue 117 therein in a mating relationship. This tongue-and-groove arrangement provides greater security against slippage or relative movement of the housing portions 101A and 101B relative to one another, especially when the i exercise device 100 is under greater stress due to the use of heavier weights.

IAn internal wall 119 (see Fig. 36) limits the insertion of the user's hand in the exercise device 100 (similar to the internal wall shown in Fig. 3 of the previous embodiments). This internal wall 119 projects U radially and joins the inner wall 104 to the outer wall 103.

Having thus described the invention, it will i accordingly be appreciated by those skilled in the art that within the scope of the appended claims, the invention may be practiced other than has been specifically described therein.

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Claims (9)

1. An exercise device for strengthening the targeted muscle of a user, characterized by the fact that the device has an opening formed therein through which the hand of the user may be inserted, the opening being defined by a pair of walls in the device and including an inner wall and an outer wall, whereby the user's hand is substantially curved around the inner wall and is disposed between the inner and outer walls, respectively, further an internal wall is provided within the device for limiting the insertion of the user's hand through the opening, such that a forceful grip of the user's hand on the weight means is not necessary, and such that the necessity for employing the user's conjunctive adjoining muscles is substantially reduced, thereby substantially reducing the tendency to detract from the development of the user's targeted muscle.

2. The exercise device of claim 1, further characterized that the inner wall has a convex outer surface, the outer wall has a concave inner surface and is disposed radially of the inner wall, and the internal wall comprises a radial wall joining the inner and outer walls beyond the opening in the device.

3. The exercise device of claim 1, further characterized that the device is substantially spherical, and that the opening is formed therein substantially tangentially thereof.

4. The exercise device of claim 3, further characterized that the device has a housing formed by a pair of hemi-spherical complementary mating shells having annular peripheral edges joining together along a common midplane.

5. The exercise device of claim 4, further characterized that the weight means is a cylindrical weight secured between the complementary mating shells and intersecting the common midplane transversely thereof.

6. The exercise device of claim 5, further characterized that the cylindrical weight has respective ends, each of which is secured to one of the complementary mating shells, thereby securing the shells to each other.

7. The exercise device of claim 5, further characterized that the cylindrical weight has an outer diameter which may be varied to vary the overall weight of the exercise device. L r C I I c r t i c C€ CC Crte C I C I t C C C Ce C (C 27

8. The exercise device of claim 4, further characterized that each hemi-spherical mating shell has an outer wall having a concave inner surface, and further has an inner wall having a convex outer surface, such that when the user's hand is inserted through the opening and between the inner and outer walls, the palm of the user's hand confronts the convex surface of the inner wall, and the back of the user's hand confronts the concave inner surface of the outer wall.

9. The exercise device of claim 8, further characterized that the inner wall has a concave portion substantially adjacent to the opening in the device, such that the heel of the user's hand may rest upon the concave portion of the inner wall. DATED this 12th day of August, 1992. DAR PRODUCTS CORPORATION WATERMARK PATENT TRADEMARK ATTORNEYS THE ATRIUM 290 BURWOOD ROAD HAWTHORN VICTORIA 3122 AUSTRAUA LPS/ML DOC 018 AU3092789.WPC r i V 1 8e J aigselhsa utrwl aigacnav ne ufcadfute a ninrwl I aigacne ue ufce uhta hnteue' hn sisre hog h I opnn n etenteinr n ue als h amo teue' ad ofot h