US3613141A - Material conditioning device - Google Patents

Abstract

A SONIC ENERGY FABRIC TREATING APPARATUS HAVING AN ECCENTRICALLY ROTATIONAL MASS WHICH IS RESILIENTLY SHOCK MOUNTED AT ONE AXIAL END BY ONE SHAFT. ANOTHER SHAFT AT THE OTHER AXIAL END IS CONNECTED FOR TRANSMITTING SONIC VIBRATION. THE SHOCK MOUNTING INCLUDES A BORE IN A BOSS ON A SHELL SURROUNDING SAID MASS AND ANNULAR RESILIENT

SLEEVES BETWEEN SAID ONE SHAFT AND SAID BORE. THERE IS ALSO PROVIDED A HANDLE WITH A VIBRATION ISOLATED CONNECTION THEREFOR.

Description

o1.19,1971 Hmm/YER f 3,613,141

MATERIAL CONDITIONING DEVICE Filed June `l1, 1969 4 Sheets-Sheet 1 fy. m.

Oct. 19, 1971 H. T. sAwYER 3,513,141

` MATERIAL CONDITIONING DEVICE Filed June 11, 1969 4 Sheets-Sheet 8 9 I3@ u [Ol 105 '|23 lo@ 98 AQOLD 'Z'. Jah/ver( INVENTOR.

Oct. 19, 1971 H. T. sAwYr-:R 3,613,141

MATERIAL CONDITIONING DEVICE F'iled June ll, 1969 4 Sheets-Sheet 3 la@ M.

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MATERIAL CONDITIONING DEVICE I Filed June l1. 1969 4 Sheets-Sheet L Ffm.. 18.

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ld! l d5 INVENTOR. Q45 1 HAQOLD 'I'. SAWYEQ 111mm I AvTW ATTOQEYS.

United States Patent O 3,613,141 MATERIAL CONDITIONING DEVICE Harold T. Sawyer, Pacific Palisades, Calif., assignor of a fractional part interest to Vernon D. Beehler, Los Angeles, Calif.` Continuation-impart of applications Ser. No. 631,736, Apr. 18, 1967, and Ser. No. 642,077, May 29, 1967. This application June 11, 1969, Ser. No. 832,156

Int. Cl. A471 11/12 U.S. Cl. 15-98 5 Claims ABSTRACT F THE DISCLOSURE A sonic energy fabric treating apparatus having an eccentrically rotational mass which is resiliently shock mounted at one axial end by one shaft. Another shaft at the other axial end is connected for transmitting sonic vibration. The shock mounting includes a bore in a bOSS on a shell surrounding said mass and annular resilient sleeves between said one shaft and said bore. There is also provided a handle with a vibration isolated connection therefor.

This is a continuation-in-part of copending applications Ser. No. 631,736 tiled Apr. 18, 1967 now Pat. No. 350,695 and Ser. No. 642,077 filed May 29, 1967 now =Pat. No. 3,497,898.

l RSUM oF PRIOR ART Although sonic energy cleaning devices exemplified by applicants Patents 3,310,129; 3,357,033; and copending applications Ser. No. 631,736, filed Apr. 18, 1967, and Ser. No. 642,077, filed May 29, 1967, disclose devices fOr making use of sonic energy in the low sonic range for cleaning and even for fabric and surface conditioning, these devices lack certain appurtenances which are needed to employ the principle for complete fabric conditioning. It is therefore among the objects of the present invention to provide a new and improved portable fabric conditioning appliance which makes use of sonic energy in the application of a fluid to the fabric and wherein an eccentrically rotational mass is mounted between an eccentric mount at one end and a resilient shock absorbing mount at the handle supporting end.

Still another object of the invention is to provide a new and improved portable hand operated fabric conditioning appliance which is substantially low powered, light in weight, and highly eflicient in the employment of sonic energy and which is capable of cavitating a fluid foam which would be applied to the fabric during application and while the foam is in contact with the fabric, thereby to thoroughly affect the fabric at an appreciable depth, while at the same time making it possible to leave the fibers of the fabric after completion of the operation in substantially the same condition they had prior thereto.

Still another object of the invention is to provide a new and improved fabric conditioning appliance which S substantially portable and easy to operate by hand, the appliance being such that it consumes relatively little er1- ergy, can be moved about over the fabric surface with particular ease, which is of such construction that it can be operated close to the base board when used for cleaning rugs and carpets on the floor, which is capable of reaching into corners, and which at the same time is of such construction that there need -be no mechanical scrubbing of the fabric during the cleaning operation.

With these and other objects in View, the invention consists in the construction, arrangement, and combination of the various parts of the device, whereby the 0bjects contemplated are attained, as hereinafter set forth,

Mice

pointed out in the appended claims and illustrated in the accompanying drawings.

In the drawings:

FIG. 1 is a side perspective view of the fabric conditioning device shown in a position applied to a surface to be cleaned.

FIG. 2 is a fragmentary cross-sectional view taken on the line 2 2 of FIG. l. l

FIG. 3 is a longitudinal sectional view taken on the line 3 3 of FIG. 1.

FIG. 4 is an elevational View of the tool partially broken away.

FIG. 5 is a fragmentary bottom view taken on the line 5 5 of FIG. 2.

FIG. 6 is a fragmentary sectional view of another form of the work contacting plate.

FIG. 7 is a fragmentary bottom view of the plate of FIG. 6.

FIG. 8 is a fragmentary sectional view of another form of work contacting plate.

FIG. 9 is a fragmentary bottom view taken on the line 9 9 of FIG. 8.

FIG. 10 is a front elevational view partially in section showing still another form of tool.

FIG. 11 is a front elevational view of the device equipped with a modified type of mounting.

FIG. 12 is a side elevational View of the device of FIG. l1.

FIG. 13 is an enlarged fragmentary longitudinal sectional view taken on the line 13 13 of FIG. l1.

FIG. 14 is an enlarged side elevational View Of the modified mounting with portions broken away.

FIG. 15 is a plan view taken on line 15-15 of FIG. 14.

FIG. 16 is a side elevational view showing the device in position on a carpet.

FIG. 17 is a top view of the tool holder partially broken away showing a modified attachment of the tool to the tool holder.

FIG. 18 is a fragmentary longitudinal sectional view on the line 18-18 of FIG. 17.

FIG. 19 is a fragmentary longitudinal sectional view on the line 19-19 of FIG. 17.

In the device showing one embodiment there is provided `a substantially spherical thin wall hollow shell 10 provided with a handle 11 and a plate beam tool holder 12 capable of being resonated. A reservoir 13 for cleaning fluid is fastened to the handle 11 and fluid supply tubes 14 conduct the cleaning fluid through the tool holder wherein the cleaning fluid is fed to an accumulator chamber 15 from which it is ejected through a multiplicity of perforations or orifices 16 in a work contacting plate beam 17 capable of being resonated. Although in the eX- ample described in detail reference is made to cleaning fluid by way of explanation, it should be understood that other types of conditioning fluid such as a dye can be employed with equal effectiveness.

Within the shell 10 there is mounted a motor 18, one end 19 of which has a resilient isolation mount 20 here taking the form of a spring. At the other end 21 of the motor a motor shaft 22 has an eccentric device installed in a bearing 23 which comprises the upper end of a pedestal 24, the pedestal in turn being secured at a single location to a block 25. More particularly, the bearing 23 is provided with an eccentric disc 26 rotatably mounted on a stub shaft 27 and the motor shaft '22 is nonrotatably mounted on the eccentric disc 26 at an eccentric location relative to the axis of the stub shaft 27. Accordingly, when the motor 18 is set in operation and the motor shaft 22 rotates, the eccentric disc 26 is simultaneously caused to rotate about the axis of the stub shaft 27. This operation generates a conical circulatory movement of the motor about its longitudinal axis with the base of the cone being at the eccentrically mounted end and the apex of the cone being at the resilient isolation mount 20. The motor thus rotates. about an axis substantially coincident with the stub shaft 27 of the eccentrically designed assembly on the pedestal and the axis of the opposite end 19 of the motor. The sinusoidal force thus generated by the rotating mass of the motor is passed through the pedestal 24 to the block 25 and in that way to the shell 10 and thus to the plate beam tool holder 12 for use of the sonic energy generated.

It is significant that the block 25 is in radial alignment with the axis about which the motor mass operates and is approximately in line transversely with the center of mass of the motor. Bolts 2181 fasten a base 2.9 of the bracket 24 to the block 25. Lead wires 30 and 31 which conduct electricity to the motor pass through staggered sound blocking wafers 32 and 33` in the handle to a cap 34 Where they can interconnect with an appropriate cord. A potting 35, 36 o-f an appropriate damping resin material may be employed toanchor the wires 30, 31 and also to fasten the handle .1'1 to a boss 37.

The plate beam tool holder which heretofore has been indicated generally by the reference character 12 consists of a tool holding resonating plate beam 401 which anchors directly to the block 25 by an appropriate conventional attachment, depending upon the materials employed for the block and the tool holding plate beam. When the materials are stainless steel, they may be welded, or when plastic they may be attached by an appropriate compatible or soluble adhesive, or on occasions formed and assembled as a single piece. Opposite sides 41 and 42 of the tool holding plate beam 40 are bent slightly inwardly in order to effectively retain a sonic energy transmitting material pad 43I which may be of relatively soft, high density, open pore cellular substance capable of being resonated, such for example as industrial open pore urethane. The pad 431 is preferably bonded to an impervious back-up plate beam 44 which has already been made reference to as forming the inside wall of the accumulator chamber 15. The work contacting plate beam 17 has peripheral flanges 45, 46, 47, etc., which overlie complementary flanges 48 of the back-up plate beam l44 and to which they are bonded to make a sealed connection.

Tubular posts -50 and 51 are installed through their respective locations in the back-up plate beam 44y and serve as connections for the tubes 14. The post 50, as shown in FIG. 2, extends through grommet 52 which outlines holes 53 through the tool holding plate beam 40.

Although the lower surface of the wonk contacting plate beam 17 has been shown as one made perfectly smooth, so-me circumstances may suggest a somewhat rougher work contacting plate beam, like the work contacting plate beam 55 shown in FIGS. 6 and 7. On the face of the work contacting plate beam 5 are diagonally directed depressions 56 which extend across the lower face of the plate beam 55 and substantially uniformly spaced perforations 57 communicate between the accumulator chamber 15 and the depressions 56 along their respective center lines.

Still another form of work contacting plate beam 60 is shown in FIGS. 8 and 9. For this construction perforations 6'1 communicate with respective individual pockets 62 which are spaced from each other on the lower face of the plate beam 60v as shown in FIG. 9.

In other words the masses, sizes and relative positions of the sundry parts of the devices are designed to vibrate at or near their respective natural frequencies when vibrated by the eccentric motor mass operating at a selected power input.

It will also be understood that there m-ay also be supplied for use with the plate beam tool holder .12l a plate beam assembly `65 as shown in FIG. l0, the assembly being one consisting of a sonic energy transmitting pad 66, a work engaging pad 67 and a carrier plate beam 68 to which both pads are bonded by an appropriate aclhesive. Posts 69 and 70i are mounted upon the carrier plate beam 68 whereby to transmit liquid through the pad 66, the carrier plate beam 618 and through a passage 71 in the work engaging pad 67 In this way liquid of the type desired may be passed directly and uniformly to the surface upon which work is to be performed where the work engaging pad 67 when in a condition of resonance, makes use of the liquid in treating the surface of the work.

In operation the appliance is first set up as shown and described in connection with FIGS. 1 through 5 inclusive. The reservoir 131is filled with cleaning fluid, the appliance is placed upon the surface to be cleaned, the motor started and the fluid shut-off valve 72 opened to full flow condition. The valve 72 need not be a regulating lvalve, since it can be arranged in full open position to supply sufficient fluid under circumstances wherein the call for fluid will be a constant one depending upon the structure of the appliance. Liquid then fiows through the tubes 14 into the accumulator chamber 15 filling the chamber. The liquid in the chamber 15 will be in a condition approaching resonance and cavitation will begin by action of the machine and the liquid thus in a condition approaching resonance will be ejected as foam through the multiple perforations 16 onto the fabric, uniformly lthroughout the area of the plate beam 17. Because the liquid is in a resonant condition and cavitation is taking place, as it emerges from the perforations 16, it will emerge in the form of a foam in which condition it is applied to the fabric. As the operation of the appliance continues, cavitation will continue to exist in the foam as it surrounds the fibers of the fabric and passes through and around the pile of the fabric, if it be a rug or carpet, to the anchoring base of the fibers. This will be sufficient to likewise place the individual fibers in a condition of resonance in the form of individual cantilever beams, accounting more and more for the efficient cleaning action of the appliance. Since there is a substantially constant emission of liquid through the perforations 16, and constant cavitation within the liquid, the vibrating plate beam 17 and all that it supports will rest but very lightly on the surface on which the work is being performed and the appliance can then be moved steadily and freely, and with little physical exertion over all portions of the surface, near the base board and into the corners. The work progresses as described until all portions of the work have thus been treated with the cavitation cleaning action within the fabric.

The shut-olf valve 72 is then closed and the resonating appliance is then guided over the surface to continue cavitation of the foam within the fibers and the fibers themselves to complete the cleaning operation.

Thereafter, the foam and the dirt which it has gathered can be removed either by means of a commercial wet vacuum cleaning device or vacuumed after the material is dry. Should not all of the foam be capable of removal in the first instance as described, the fabric cleaning device, as heretofore described with the liquid cleaner shut off, is again passed over the surface during which operation the fibers will also vibrate at or near their natural frequency and the resultant Vacuum action of the cavitation induced in moisture around the fibers will draw the residual foam and moisture to thesurface at which time it can be removed as previously described by a vacuum device or squeegee. Mechanically induced vacuuming will assist in raising the fibers from the nap. The cavitation action described not only serves to keep fibers of the pile or fabric separated and untangled but also serves to remove all excess moisture from the bottom of the pile so that the material being only moist and not wet at the conclusion of the treatment will dry with reasonable rapidity. Because of the cavitation action of the cleaning device as described, it is not necessary to follow up the operation with a brushing operation in order to have the fibers being cleaned stand properly and separately.

In a cleaning operation like that described, the fibers, to which the cavitating foam has been applied, experience compressional sound waves launched from the vibrating work engaging plate beam surface which travel in the direction perpendicular to the surface of the material and the released sonic energy of -very high amplitude and intensity penetrates the rug fibers and causes the fibers to freely vibrate at or near their natural frequency as individual cantilever beams. The resultant vibration of the fibers in direct contact with the cavitating foam cause an intense cavitation of the foam surrounding the fibers. It is the acoustical cavitation thus produced which does the effective cleaning. The foam which is driven within the fibers during resonance contains what has been aptly described as millions of small bubbles and these bubbles in physical contact with the fibers, continuously undergo alternate cycles of pressure and vacuum. It is during this vacuum portion of the cycle that the major cleaning takes place, since the foam and fibers undergo an intense vacuuming caused by the implosion effect of the bubbles under pressure which pulls the dirt from the fibers and transfers the dirt to the foam. Particularly effective cleaning results have been determined to exist at frequencies in the lower sonic range preferably at frequencies of from 50 to 500 cycles per second.

It will further be understood that by having the sinusoidal force action generated by the motor applied at only one location to the resonating shell, all of the energy is funneled through that pedestal mounting to the vibrating plate beam structure and the frequency of that assembled structure is designed to be in phase for best results.

In the embodiment of the invention illustrated in FIGS. 11 through 15, inclusive, a shell 80 capable of being vibrated in the manner described, is shown mounted on a tool holding plate beam 81 by means of an outside block 82 having a hemispheroidal recess 83 and an inside block 84 having a lower face 85 shaped to match the adjacent portion of the interior of the shell 80. The inside block 84 is preferably of Fiberglas reinforced synthetic resin welded at the lower face 85 to the inside surface of the shell. For most purposes the tool holding plate beam 81 can be of aluminum or stainless steel, in which event the outside block 82 is also made of matching aluminum or stainless steel, the tool holding plate beam 81 being attached to the outside block 82 by means of bolts 86 which extend through the shell 80 and into the inside block 84.

Within the shell 80 is a chamber 87 which provides ample space for the mounting of a motor 88. As in the first described form of the cleaning device, there is a single pedestal or bracket 89 for mounting the motor shaft eccentric bearing 89 at one end 90 of the motor 88 and a boss 91 for mounting the motor 88 at the other end 92. At the end 92 of the motor is a flange 94 on which is a stub shaft 95 which in turn is supported in a recess 96 of the boss 91. An annular bushing 97 has a bore 98 which accommodates a retention sleeve 99 with a pressed fit. The retention sleeve 90 may be press fit to the bushing 97. A mounting or diaphragm 100 of resilient material is confined by the retention sleeve 99 and extending through the retention sleeve 99 is a cylindrical sleeve 101 which surrounds and accommodates the stub shaft 95. A nut 102 and washer 103 serve to retain the mounting or diaphragm 100 and retention sleeve on the stub shaft 95.

At the other end 90 where a motor shaft 93 protrudes there is provided an eccentric disc 104 fixed nonrotatably to the motor shaft, the eccentric disc 104 having a stub shaft 105 revolving within a bearing connection 106 on the upstanding end of the pedestal 89. The opposite end 103 of the pedestal 89 is securely attached to the outside block 82 by means of bolts 107 which extend through nylon or other appropriate plastic flanged bushings 108, to electrically isolate them from the bracket.

In order to provide an attachment for a handle and handle shaft 111, a channel section 112 is bolted to the underside of the boss 91 by means of bolts 113, seen advantageously in FIGS. 13, 14, and 15. At each end of the channel section 112 is a noise, shock and vibration isolation mount 114 comprising a section of resiliently designed material. A bracket 115 is secured over the isolator mount 114 to the channel section 112 by means of a bolt 116 provided with an appropriate nut 117 and 118. A yoke 120 may be secured to the lower end of the handle shaft 111 with a leg 121 at each end provided with an extension 122 pivotally secured to the respective bracket 115 by a bolt 123 and nut 124, or by other conventional means.

Mounted as described, the pivotal connections formed by the bolt 123 are more or less at the center of mass and also relatively close to whatever surface the tool holding plate beam 81 might be applied so that the tool holding plate beam 81 can be shifted readily over the surface by the handle and the handle pivoted up or down depending upon the need to manipulate it appropriately.

On those occasions where some liquid supply is to be provided, as for example, for a fabric cleaning tool or a fabric dying tool, a supply tank is mounted on the handle shaft 111. An outlet pipe 131 feeds liquid to a manifold 132 from which extend supply tubes 133. Appropriate fittings 134 attach the supply tubes 133 in each instance so as to pass through the tool holding plate beam 81. By making the supply tubes 133 of flexible material, the handle shaft 111 can be pivoted freely without interfering with the connections of the supply tubes 133 between the manifold and the -tool holding plate beam 81.

As a further convenience a fitting 135 may be provided to accommodate an electric lead connection 136 so that electric wires may extend through a passage 137 in the boss 91 and by this means be lead into the chamber 87 for connection to the motor 88.

For a better understanding of how the portion of the device referred to for convenience as a tool 140 may be attached to the tool holding plate 81, by way of example, reference is made to FIGS. 16 through 19, where a tool like that described in connection with FIGS. 8, 9, 1l and 12 is shown. In this example, the pad 43 is fastened to the back-up plate beam 44 by means of an appropriate adhesive, but there is no connection between the pad 43 and the tool holding plate 81 other than a face-to-face contact.

Mounted on the back-up plate beam 44 are two posts 141, a lower boss 142 of which extends through a hole 143 in which it is fastened by some appropriate conventional means. A seal 144 is employed to make certain of a sealed tight joint.

`In the tool holding plate 81 are holes 145 each in axial alignment with the respective hole 143 in the back-up plate beam 44. A grommet 146 of flexible vibration damping material is confined in the hole 145, each grommet being provided with a passage 147 through which extends the upper end of the post 141. T-here is an annular recess 148 at the upper end of the post 141 adapted to receive an anchoring ring 149.

As shown in FIG. 17, a leg 150 of the fitting 134 has a threaded engagement with a bore 151 through the post 141 so that liquid from the tube 133, for example, can astss through the bore 151 to the accumulator chamber It should be borne in mind that the pad 43 is compressible and that the post 141 can slide endwise through the passage 147 resisted only by a slight amount of friction. When the tool 140 is to be assembled on the plate beam 81, the two posts 141 are pushed through the respective passages 147 and pressure applied downwardly to the tool holding plate beam 81 sufficient to expose the annular recesses 148. The anchoring rings 149, being of flexible material, are then pushed over the ends of the posts to a position engaging the annular recesses 148 and once attached, the tool 140 is prevented from falling free of the tool holding plate beam 81 when the device is lifted for moving it about from one place to another. There is, however, a sufficient weight pushing downwardly on the tool holding plate beam 81, namely the weight of the apparatus itself, to compress t-he pad 43 slightly and to varying degrees as the device is operated. Because of the posts 141 being isolated from the point nf view of transmission of vibration from the tool holding plate beam 81 acoustic energy set up in the tool holding plate beam 81 is transferred to the back-up plate beam 44 through the pad 43 by having the parts mentioned vibrated in a condition approaching resonance by wave motion traveling perpendicularly downwardly.

When this transfer of acoustic energy takes place. liquid in the accummulator chamber 15 is caused to cavitate and foam, the pressure generated being depended upon to force the foam outwardly through the perforations 61 into engagement with Lfibers 152 forming a pile of a carpet 153 provided with a backing 154 to which the pile is attached. Since there is constant communication through the foam which is generated as described, the foam continues to vibrate and cavitate after it leaves the apertures 61 and while it is in contact with the fibers 152 and also the backing 154. In this way the acoustic energy is conducted through the device to the fabric which is being conditioned and the elements of which the fabric is made up are in this way set in vibration. When the conditioning is for cleaning purposes, dirt in the carpet is loosened by the vibration thus transmitted. After the device has been passed over the carpet, the dirt laden foam is removed by some appropriate means, either by squeegee or wet vacuum, after which the device is again passed over the carpet, this time without reapplication of the foam, in order to set residual foam again in vibration to bring it to the surface with .remaining portions of the dirt. By reason 'of the fact that the tool 140 is the sole support for the device on the carpet and by reason of the fact that the opposite plates of the tool are set in a condition of vibration, the tool is in effect lifted off the carpet by the action. This action also accounts for maintaining the fibers of the pile separated one from another and, on those occasions where the pile is an upstanding pile, the fibers are left in a separated untangled condition, such that as soon as the moisture dries the fabric has in effect been renewed in that the parts, be they pile fibers or Lfibers in some other mechanical relationship, resume their original relationship from which they may have been disturbed by impregnation of soil and dirt, or matting due to some sticky material.

On those occasions where the device is used, for example, for dyeing the fabric rather than cleaning, the dye being applied in the form of foam is caused to smoothly and evenly penetrate the fabric. After application of the dye, the parts of the fabric are assisted in resuming their original relationship by reason of the vibrating action set up while the dye is applied.

Having described the invention, what is claimed as new in support of Letters Patent is:

1. A sonic energy type conditioning device comprising a hollow shell of relatively stiff resilient consistency having a chamber therein, a power actuated rotationally movable mass in said chamber, a pedestal comprising an eccentric bearing support for one end of said mass, means securing an end of said pedestal remote from said eccentric bearing support to the shell at one location only in a line radial with respect to the direction of the rotational motion, a tool holder plate beam capable of vibrating at or near its own natural frequency connected to the pedestal at said end remote from said eccentric bearing support and on the outside of the shell, a boss on the shell having an annular wall therein forming a bore, and a resilient isolation assembly at the other end only of said mass and located within said bore in axial alignment with the axis of rotational motion of said mass, said isolation assembly comprising a second support for said mass, a first shaft for said mass operably connected to said eccentric bearing support, said resilient isolation assembly comprising an annular mounting of resilient material -having an exterior wall in engagement with the annular wall of said bore and a second shaft for said mass at the end opposite said first shaft, said second shaft having a concentrically confined position in said annular mounting, and a member of synthetic plastic resin material between said second shaft and said annular mounting comprising a connection between said boss and the second shaft, said second shaft being journalled in said resilient isolation assembly.

2. A sonic energy type conditioning device comprising a hollow shell of relatively stiff resilient consistency having a chamber therein, a power actuated rotationally movable mass in said chamber, a pedestal comprising an eccentric bearing supoprt for one end of said mass, means securing an end of said pedestal remote from said eccentric bearing support to the shell at one location only in a line radial with respect to the direction of the rotational motion, a tool holder plate beam capable of vibrating at near its own natural frequency connected to the pedestal at said end remote from said eccentric bearing support and on the outside of the shell, a boss on the shell having an annular Wall therein forming a bore, and a resilient isolation assembly at the other end only of said mass and located within said bore in axial alignment with the axis of rotational motion of said mass, said isolation assembly comprising a second support for said mass, a first shaft for said mass operably connected to said eccentric bearing support, said resilient isolation assembly comprising an annular mounting of resilient material having an exterior wall in engagement with the annular wall of said bore and a second shaft for said mass at the end opposite said first shaft, said second shaft having a concentrically confined position in said annular mounting, an isolation mount on the exterior of said boss, a handle including a handle shaft, and a tiltable connection between said handle shaft and said isolation mount comprising means for manipulating said device having a vibration isolated connection thereto.

3. A sonic energy type conditioning device as in claim 2 including a yoke on the end of said handle shaft adjacent the shell having legs extending around respective sides of the boss, an isolation element in engagement with each leg of the yoke, and bracket means pivotally connecting the yoke to the respective isolation element.

4. A sonic energy type conditioning device as in claim 2 wherein said tiltable connection is located intermediate the boss and said bracket and below the center of gravity of said mass.

5. A sonic energy type conditioning device comprising a hollow shell of r'elatively stiff resilient consistency having a chamber therein, a power actuated rotationally movable mass in said chamber, a pedestal comprising an eccentric bearing support for one end of said mass, means securing an end of said pedestal remote from said eccentric bearing support to the shell at one location only in a line radial with respect to the direction of the rotational motion, a tool holder plate beam capable of vibrating at or near its own natural frequency connected to the pedestal at said end remote from said eccentric bearing suport and on the outside of the shell, a boss on the shell having an annular wall therein forming a bore, and a resilient isolation assembly at the other end only of said mass and located within said bore in axial alignment with the axis of rotational motion of said mass, said isolation assembly comprising a second support for said mass, a first shaft for said mass operably connected to said eccentric bearing support, said resilient isolation assembly comprising an annular mounting of resilient material having an exterior wall in engagement with the annular wall of said bore and a second shaft for said mass at the end opposite said 9 10 rst shaft, said second shaft having a concentrically con- 3,357,033 12/1967 Sawyer 15-98 fined position in said annular mounting. 3,110,129 3/ 1967 Sawyer 259-1 X References Cited WALTER A. SCHEEL, Primary Examiner UNITED STATES PATENTS 5 L. G. MACHLIN, Assistant Examiner 2,630,784 3/ 1953 Wallerstein, Jr. 306--20 3,181,190 5/1965 Dix et a1. 15-98 U-S Cl- XR- 3,330,515 7/1967 Janssenetal 24S- 358 181-'5515-143

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