KR830000262Y1 - Fluid-acting frontal exercise equipment - Google Patents

Abstract

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Description

Fluid-acting frontal exercise equipment

1 is a perspective view of a hydraulic frontal exercise device according to the present invention.

2 is a partially enlarged front view of the frontal power head of the FIG. 1 instrument.

3 is a plan view of the powder head of FIG.

4 is a sectional view along line 4-4 of FIG.

5-7 are cross-sectional views similar to FIG. 4 showing various modifications of the powerhead of FIG.

8 is a perspective view of an orbital wet sander made in accordance with the present invention.

9 is a cross-sectional view of the wet sander of FIG.

The present invention is directed to a fluid operated nutating action mechanism.

Hydraulic actuation mechanisms are already known in principle, and the prior art includes many examples of such devices. Such hydraulic instruments have scrubbing brushes or the like, which are rotationally driven by hydraulic motors. An aggressive weaving turbine type motor has been proposed, and it has also been proposed to discharge some or all of the effluent through the tool to assist in the operation of the tool. Despite the numerous prior art proposals for hydraulically driven appliances, none of them have been satisfactory for small portable household appliances. In some cases, small hydraulic motors are inadequate for the job. In another example, the motor is extremely complex, expensive, and inappropriately large in size or weight.

Accordingly, a fundamental object of the present invention is to provide a new and improved hydraulic apparatus which is of very economical structure, is small and light, suitable for portable use, and operates at an acceptable level of power consumption and acceptable efficiency.

In accordance with one of the features of the present invention, there is provided a fluid-driven implement that uses a head movement motor in a novel and unique manner and is built into the instrument housing and driven by the flow of a fluid, such as water from a domestic water source. do. The frontal motor itself is well known in the art and is widely used for that purpose, for example when driving a water meter. Some representative patented technologies for such motors are as follows. That is, US Pat. Nos. 2,174,306 to "Bassett", 2,253,306 to "Probst", 2,294,825 to "Basset", "Trap", and the like, are 2,921,468. Most commonly, prior art frontal motion motors are used in relatively low power devices such as water meters. However, US patent 686,686 to "Bell" is an example of such a motor used in relatively powerful devices.

According to a structure so far known, the frontal motion motor device has a water inlet and outlet facility and includes a housing containing a rocking plate or disk mounted on a sphere. The sphere is mounted so as to be able to move freely with respect to the housing within a certain angle limit and extends perpendicularly from the sphere along an axis extending beyond the center of the rocking plate. The swinging plate has a slot on one side and spans the separating plate dividing the housing, and the swinging plate is embedded in the housing. In normal operation of the frontal device, water enters the housing of one side of the divider and travels in a circular passage around the housing and exits through an outlet on the opposite side of the divider.

The swinging plate is held at a position inclined by the rotating shaft member engaged with its axis. Thus, when the melt enters the housing and passes around the housing to reach the outlet, water is pressed against the inclined rocking plate. Since the ramp is unable to rotate, the angle of inclination gradually changes as a result of the continued flow of water. Rotational output is obtained by connecting the inclined axis to the rotational axis via a suitable crank. Thus, even if the axis of the oscillating plate does not rotate itself, the axis undergoes orbital motion with a gradual change of the tilt angle of the oscillating plate, which is used to obtain rotational output from an axis axially fixed on the fixed axis in the prior art device .

According to the present invention, a unique advantage is obtained by using the frontal motion motor and directly connecting the work tool to the axis of the frontal plate or disc so that the work tool itself operates in the frontal orbital motion. By directly connecting a work tool such as a brush to its axis, it is possible to reduce the number of parts from the tool, reducing the manufacturing and assembly costs, as well as making the operation of the device more reliable and easier to maintain. .

As a feature of the present invention, work tools such as soles, sanders, buffers, and the like are mounted directly on an axis that forms a fixed portion of the frontal disk. Therefore, in the operation of the present mechanism, the work mechanism makes orbital movement at a constantly varying inclination angle. However, the work mechanism does not rotate around the axis of its mounting shaft. This provides a highly desirable form of operation that facilitates holding and use of the device.

According to another main feature of the present invention, the work tool (sitter, brush or purge tool) is supported apart at intervals with respect to the motor housing by a support means that is easy to bend in the transverse axis. In a preferred form of the present invention, the support means has a rubber boot structure that interconnects the plate and the work tool. The boot structure is sufficiently rigid to press to prevent folding of the work tool against the motor mounting plate under normal operating pressure and is sufficiently resiliently in the transverse direction to allow movement of the work tool on the plane of the work tool. Of course, other supporting means such as, for example, rubber or coil springs may be used. The shaft extends from the motor housing in the boot structure and is directly connected to the work tool by universal joint means. The frontal motion of the wobble plate causes the axis to move in an orbital manner transmitted to the work tool by means of universal joint means. It is preferable that the supporting means that are easily bent laterally bend so that the work tool moves in orbit.

In its simplest form, the frontal locomotive mechanism of the present invention can be made of a single moving part, a frontal disk with a work tool mounted directly.

In some aspects of the present invention, provision may be made for diverting a portion of the water and discharging it in a continuous or intermittent manner through the work tool to enhance operation of the work tool. Thus, when the work tool is a cleaning brush, it may be beneficial to drain some or all of the water through the brush to assist with its cleaning action. Of course, in general, the idea of draining water through a brush is well known, and many examples thereof are known in the art. However, according to the present invention, a unique and simple facility for achieving the discharge of water is provided. The installation includes the installation of a frontal member having a hollow shaft extending through the central sphere.

The open end of the hollow shaft is arranged in communication with one side of the water supply pipe to provide the desired flow. In some variations of the invention, the hollow shaft is disposed in communication with the plenum chamber and thus the water flow is constant. In another form, the water communicates with the hollow shaft in a limited rotational cycle portion to effect intermittent discharge at the outlet.

According to another basic object of the present invention, there is provided a frontal exercise device that is inexpensive and suitable for mass production so as to be suitable for commercialization into a high sales household appliance. It is also made because it is light and durable. For this purpose, the apparatus is usually made of precisely molded plastic parts that can be used as-mold without the need for costly machining or other machining processes.

The above and other objects, features and advantages of the present invention will be more fully understood from the following description of the preferred embodiments described in connection with the accompanying drawings.

1 to 4, numerals 10 and 11 denote upper and lower portions of the motor housing. The housing portion advantageously has a molded plastic construction and is joined along the center line 12 to form a hermetically sealed chamber 13. In general, the chamber 13 is a rotating body having a bow-shaped side wall 14, the arcuate curved center of which has a central point 15 along the axis of rotation. The upper and lower walls 16 and 17 of the chamber are conical, with the opposite upper and lower chamber walls 16 and 17 symmetrically with respect to the plane passing through the center point 15 perpendicular to the axis of rotation, for example, a 40 degree angle. It is arranged to form.

In the central region of the motor housing, each housing portion is formed with a spherical bearing seat 18, 19, which allows the spherical bearing 20 to move freely. It is arrange | positioned so that seating is possible. The bearing 20 may be made of molded plastic. The housing parts 10, 11 and the spherical bearing 20 are free of the spherical bearing 20 from its sheet when the bearing is supported on the sheets 18, 19 and fixed in the assembled position of the housing parts. Precise plastic castings for transport. At the same time, the spherical bearing and its sheets 18, 19 are sufficiently tightly attached to reduce the leakage of fluid (generally water) to the actual minimum past the housing. The minimum leak is expected and acceptable and acts to some degree as a bearing lubricant.

According to the known structure of the frontal motor, the spherical bearing 20 is mounted thereon with an annular disk or flat plate 21 which is aligned on the hemispherical plane and passes through the center point 15. Although not necessary for the operation of the mechanism, it is most advantageous that the annular disk 21 is made of plastic molded integrally with the spherical bearing 20. The disc 21 and the bearing 20 form a rocking plate or disc or frontal motor. As shown in FIG. 4, the shape of the conical housing walls 16, 17 is such that the top surface of the disk has a radius when the disk is inclined to the maximum range allowed by the housing walls 16, 17. It is thus related to the thickness of the annular disk 21 so that it tangentially contacts the upper housing wall 16 and the lower surface of the disk is in tangential contact with the lower housing wall 17 along the radius.

As shown in FIG. 3, the disk 21 has an annular slot 22 formed by edges 23 and 24 of the annular disk 21 on one side. The slot 22 extends from the top of the housing chamber 13 to the bottom and spans the vertical dividing plate 25 which vertically divides the chamber completely on one side of the housing. The size and shape of the slot 22 is adapted to prevent rotation of the plate while permitting complete tilt of the rocking plates 20 and 21. In some cases, the angular orientation of the rocking plate may be closely formed by the pins 26 supported by the disks 21 directly opposite the slots 22. The pin 26 projects slightly back of the edge of the disc and is accommodated in a vertical groove 27 formed in the housing portions 10, 11. In some other cases, the disk slot 22 is configured to cooperate with the splitter plate 25 to allow full frontal movement of the rocking plates 20, 21 and prevent rotation. In the latter case, pin 26 and groove 27 need not be used. The discharge rod 28 is attached to the oscillation plate 21, and may be integrally formed with the plate if necessary in the embodiments of FIGS. As shown in FIG. 4, the discharge rod 28 extends through the spherical bearing 20 and has a cap 31 whose upper end 29 constitutes a part of the upper housing member 10. It protrudes into an annular groove 30 arranged with an angle formed. The annular groove 30 surrounds a conical center guide 32 which acts on the upper end 29 of the discharge rod so that the discharge rod is kept inclined from the rotation axis (vertical in FIG. 4) of the housing at a certain position of the rocking plate. In the embodiment shown, the upper end of the discharge rod is also loosely surrounded by the outer wall of the groove 30. However, such an outer closure member is not required because the inclination angle of the rocking plate is limited by the tangential contact between the annular disk 21 and the upper and lower surfaces 16 and 17 of the housing. The lower end 33 of the discharge rod 28 protrudes out through the conical gauge 34 of the lower housing 11. The opening 34 has a conical outer wall 35 surrounding the trajectory of the discharge rod 28.

In the illustrated form of the present invention, the motor housings 10, 11 have openings on the same shaft as the vertical divider 25 in communication with the divided flow chart tube 36. The flow conduit 36 is advantageously formed of at least a portion of a rigid plastic material and sized to be easily gripped by hand. The conduit 36 has a central vertical divider 37 which forms parallel inlet and outlet passages 38 and 39 for the working fluid.

As shown in FIG. 1, the conduit 36, which forms the handle, is connected to a flexible pair of hoses 40, the hoses being of convenient length and extending to the fluid inlet and outlet facility. . In a generally anticipated device, a diverter 41 is provided which can be removably mounted by means of an attachment 42 to a conventional household faucet 43. The switching valve 41 may have a conventional structure such as that commonly used in connection with a portable dish washer, portable washer, and the like. In general, such diverters have quick disconnect couplings 42 that allow them to be quickly mounted and removed from the faucet 43. The diverter has a means therein for passing water under pressure past one of the hoses 44 and returning drainage through the other hose 45. The drainage is discharged into the water tank from the outlet 46 installed in the converter.

In the device shown, the water under pressure enters the housing through the conduit passage 38 and flows to one side of the housing. The divider plate 25 of the motor housing is rigidly connected with the conduit divider 37 such that water flows counterclockwise (as in FIG. 3) through the annular passage formed by the motor housing 10, 11. It is. As it flows past the housing, the water gradually displaces the disk 21. For example, in the form shown in FIG. 4, the influent first touches the bottom of the disk and gradually moves the disk upwards as it moves counterclockwise past the chamber 13. Water in each unit flows through the entire circumference of the motor housing chamber 13 and is discharged through the passage 39 in the handle forming conduit 36. Under the action of the frontal motor, the continuous inflow through passage 36 and the discharge through passage 39 form a continuous, progressive rotational tilting motion of disk 21. This also allows the ends of the discharge rod 28 to move along the track path without rotational movement. Thus, a specific point on or near the end of the discharge rod 28 is drawn even if the rod does not rotate. With the cone center guide 32 provided in the cap 31 of the upper motor housing, the discharge rod 28 continuously moves through the swinging movement cycle of the disc 21, so that the discharge rod 28 is at a predetermined angle with respect to the axis of rotation of the housing. I always have it.

According to the main purpose of the present invention, the direct use of the orbital motion of the discharge rod 28 is achieved by installing work tools 47 such as brushes, polishing pads, massage heads, etc. directly on the rods. A unique advantage is obtained by installing the work tool directly on the discharge rod 28 because the work tool is moved without rotation by constantly tilting and changing the orbital motion. Thus a unique and effective action is achieved.

As is evident in the figures, the contact between the work tool 47 and the workpiece (not shown) changes constantly as the motor continues to move through each movement cycle. Assuming that the instrument and the workpiece are fixedly held, the change in angle between the work tool and the workpiece from one maximal position to another is approximately equal to the angle of angle in the motor housing or in the illustrated embodiment. 40 degrees. Thus, it is advantageous for the work tool to have a relatively bowed outer surface 48 to compensate for the change in angular orientation throughout the entire work cycle.

By installing the work tool directly on the discharge rod 28, not only a unique and very effective action is achieved but also the frontal implement is very simple and very economically manufactured. Useful power in known frontal instruments is obtained by providing additional mechanisms for converting orbital frontal movements into purely rotary motions, which are expensive, complex and undesirable for use.

In the embodiments of the present invention shown in FIGS. 1-4, the overall utility of the instrument for some purposes is the opening of the upper motor housing 10 corresponding to the conical opening 34 of the lower motor housing. It can be promoted by installing. When such an opening is installed, the upper end 29 of the discharge rod 28 can be extended upward to install a second work tool 49 of contact type. The opposing work tools 48, 49 consist of a relatively soft and rigid brush, and one or one of the work tools can be used only by turning the device upside down.

Of course, means other than the conical center guide 32 are used to hold the discharge bin 28 in the viewing angle direction when the upper end of the housing is opened to receive the second work tool. For this purpose, it is possible to use means such as the rotary bearing insert 50 described in connection with the embodiment of FIGS. 6 and 7.

In many useful applications of the frontal exercise device of the present invention, it is beneficial to achieve discharge of water through the work tool itself. Thus, when the work tool is, for example, a cleaning brush for use in cleaning dishes or for bathing, it may be required to have a constant or periodic flow of water through the head of the cleaning brush. The retrofit of the present invention shown in FIGS. 5-7 for this purpose is equipped with a unique and simple facility for discharging water continuously or intermittently through a work tool. In the example of FIG. 5, the cabbage member 51 is in the form of a hollow tube, which has portions extending beyond the spherical bearing 20 and protruding from both ends thereof. At the lower end of the tube 51, a contact type work tool 52 in the form of a cleaning brush having a plurality of bristles 53 and a circular mounting head 54 to which the bristles are mounted is mounted. The mounting head 54 is fixedly mounted to the lower end of the tubular discharging member 51 and has a plurality of passages 55 communicating with the open end of the tubular discharging member 51 and extending into the area of the bristle 53. .

The housing cap 31 is provided with an annular plenum forming recess 56 formed by slightly widening or deepening the annular recess 30 for guiding the ejecting member 51 to face the upper end of the tubular discharge member 51. It is.

In the form of the invention shown in FIG. 5, the diverter tube 57 is connected to the passage forming conduit 36 at one end 58 and to the annular plenum 56 at the other end. Depending on the specific design requirements, the upstream end 58 of the diverter tube 57 may be connected to either the inlet or outlet side of the segmented conduit 36. Somewhat higher pressure can be achieved with some efficiency loss by connecting the diverter tube 57 to the inlet side of the conduit. When the low pressure is satisfactory, the diverter tube 57 may be in communication with the discharge side of the conduit. In the latter case, it may be necessary in some instances to provide at least some restrictions in the discharge line to ensure proper working pressure of the diverter tube 57.

In the installation of FIG. 5, the water entering the diverter tube 57 always flows into the plenum 56 to fill the entire annular groove 30. At some rotational position of the discharge member 51, its upper end is in open communication with the plenum region 56, allowing water to continue to flow into the upper end of the member 51 regardless of the position of the discharge member. Thus, water continues to flow through the work head 52 at all times during normal operation of the instrument. When the work tool is a cleaning brush for cleaning dishes, the continuous flow of water through the brush greatly enhances the cleaning action.

In the retrofit of FIG. 6, the upper end cap 31 of the upper motor housing member 10 is formed with a cylindrical recess 60 for rotationally supporting the bearing insert 50. The bearing insert 50 is provided with a spherical sheath 61 engaged with and supported by the spherical bearing 20. The annular passage 62 formed in the bearing insert accommodates the protruding upper end of the tubular actuating member 51. Thus, during the frontal movement period, the bearing insert 50 rotates in the recess 60 of the upper motor housing to act to always maintain the tubular discharge member 51 in the desired angular direction with respect to the axis of rotation.

An open plenum chamber 63 is provided just above the upper end of the bearing insert 50, which communicates with the downstream outlet of the diverter tube 57. Water enters the diverter tube 57 from either side of the inlet or outlet side of the segmented conduit 36 as described above and completely fills the plenum chamber 63. As shown in FIG. 6, the diameter of the chamber 63 is adapted to provide continuous communication with the upper end of the passage 62 of the bearing insert and with the interior of the tubular actuating member 51. Thus, at any rotational position of the discharge member 51, the water supplied to the diverter tube 57 flows constantly. In the embodiment of FIG. 6, as in the embodiment of FIG. 5, the water flows uniformly through the work tool 52 during normal operation.

In another modification of the present invention shown in FIG. 7, a facility is provided for periodically discharging water through the work tool 52. In the modification of FIG. 7, the cylindrical bearing insert 50 is rotatably received in the cylindrical recess 60 of the housing cap 31. However, unlike the embodiment of FIG. 6, the FIG. 7 mechanism is not provided with a large plenum chamber on the bearing insert 50. FIG. The diverter tube 57 is inserted in the small chamber 70. The chamber 70 may be in the form of a small diameter groove or may be slightly bowed in length depending on the specific requirements of the end use. In some cases, the recess is in communication with the upper end of the bearing passage 62 only at a predetermined portion of the full rotation of the bearing insert 50. Thus, at least in some rotational cycles, preferably at most of the cycles, the bottom surface 71 of the bearing receiving groove 60 prevents water from flowing from the chamber 70 into the upper end of the tubular discharge member 51. It acts as a valve. However, during the selected rotational portion, the passage 62 is aligned with the chamber 70 and allows the water to flow briefly through the tubular discharge member 51. This arrangement causes the water to be intermittently discharged through the work tool 52 in a periodic motion.

In one of the various forms of the present invention, the known operation of the fluid-driven frontal motor is used in a unique and very advantageous manner by directly installing a contact work tool on the discharge member of the rocking plate. By this means, the non-rotating orbital motion of the discharge member is transmitted directly to the contact work implement. Various contact type work tools may be used in the present device, and of course, a single device may have more interchangeable mounting members than one type of work tool. General examples thereof include a polishing pad, a cleaning brush, a massage device, and the like.

Direct use of the orbital motion provides a unique and beneficial exercise of the work tool itself. Thus, since the rocking plate gradually changes its angular direction during the full period of the frontal motion, the work tool mounted at intervals from the pivot point of the rocking plate performs translational movement and changes the angular direction.

In FIG. 8, a wet sander mechanism 110 made in accordance with the present invention is shown in perspective view, the sander 110 having a rigid plastic hemispherical housing 111 formed to fit a user's hand. Have. The base of the hemispherical housing 111 is fixed to a plate 112 which acts as a mounting member for the sander's fluid actuated frontal motor 113 (FIG. 9). A flexible hose 114 connects the frontal motor 113 to the faucet 116 through an opening 115 adjacent the base of the hemisphere housing 111.

As shown in FIG. 9, the central portion of the plate 112 forms the top 117 of the motor housing. The bottom 118 is secured to the plate 112 by an adhesive and together with the top 117 forms a chamber 119. The chamber 119 is a rotating body which has the arched side wall 120 and whose arch-shaped center is at the center point 121 along the rotation axis. The upper and lower walls 122 and 123 of the chamber 119 are usually truncated conical, and are formed to reach up to the opposite spherical bearing sheets 124 and 125.

Similar to the frontal motor structure of the FIGS. 1-7 embodiment, the spherical bearing 126 is freely mounted between the bearing sheets 124, 125. The spherical bearing 126 is mounted with an annular disk or plate 127 which is aligned on a hemispherical plane passing through the center point 121. The sphere 126 and the disk 127 form a rocking plate for the frontal motor 113. The rocking plate is inclined such that the upper surface of the disk 127 tangentially contacts the upper housing wall 122 and the lower surface tangentially contacts the lower housing wall 123. A discharge member in the form of a rod 128 extends beyond the spherical bearing 126 perpendicular to the hemispherical plane of the disk 127. Each of the housing portions 117 and 118 has openings formed in the bearing sheets 124, 125 so that the rod 128 extends out of the frontal motor housing. The close contact between the spherical bearing 126 and its sheets 124, 125 minimizes the leakage of operator water from the bearing.

In order to maintain the inclination angle of the oscillating plate, a bendable virus facility, which is constructed as follows, is installed.

The cylindrical sleeve 129 is mounted away from the plate 112 in the hemispherical housing 111 by the hollow cylindrical spacer 130. The opening of the slave 129 is aligned with the axis of rotation passing through the center point 121. The bearing 131 is accommodated in the slave 129 to rotatably support the shaft 132, which extends into the spacer 130. The portion of the shaft 132 in the spacer 130 is a block-like structure 133 oriented at an angle with longitudinally extending recesses extending in parallel with the face occupied by the inclined disk 127. Formed. The extension rod 134 is received in the block recess and is connected to the discharge rod 128 by a connecting bearing 135 at the lower end thereof. The spring 136 acts between the connecting bearing 135 and the block-like structure 133, so that the extension rod 134 holds the rocking plate at a desired angle of inclination. When the oscillating plate is overloaded, the discharge rod 128 is moved relative to the spring 136 so that the working fluid flows directly through the chamber 119 without moving the disk. This not only prevents potential damage to the frontal motor that occurs when a rigid connection is present between the discharge rod 128 and the angle giving mechanism, but also results in very low cost without regeneration of the performance, i. Make it possible to manufacture

Again, in FIG. 9, the edges of the plate 112 are formed to have ribs 137. The rubber bootable member 138 has an inner recess 139 formed at its upper end and is received over the rib 137 to support the bootable member 138 on the plate 112. The flange 140 folded inward is formed at the opposite end of the bootable member 138. In a preferred embodiment, the work tool is a wet sandy consisting of a polishing pad 141 with a flange 142 of an L-shaped cross section. A slot 154 is formed between the flange 142 and the polishing pad 141 and the flange 140 of the bootable member 138 to support the pad 141 at intervals parallel to the motor firewood plate 112. Accept. Bootable member 138 is formed of a sufficiently rigid rubbery material that is compressed to maintain a gap between polishing pad 141 and plate 112 under normal operating conditions. However, the bootable member 138 is sufficiently elastic in the transverse direction to allow the polishing pad 141 to move orbitally in its plane.

In the illustrated form of the present invention, the surface of the polishing pad 141 opposite the plate 112 has a circular block 142 protruding inward at its center. The circular block 142 reaches the spherical bearing sheet 144. The discharge rod 128 of the frontal motor 113 is a ball 145 seated in the bearing sheet 144 to provide a direct drive coupling between the frontal motor 113 and the polishing pad 141. Has)

The fixing member 146 held by the pad 141 is disposed adjacent to each end of the polishing pad 141 by the thumbscrew 147 accommodated in the screw hole 148 formed in the polishing pad 141. The edge of the pad 141 is machined to have a rounded surface 149. Sand paper 150 is disposed on the outer surface of the polishing pad 141 and both ends thereof are rolled around the rounded surface 149 and fixed below the fixing member 146 by the thumbscrew 147.

As shown in the embodiment of FIGS. 1-7, the disk 127 of the embodiment of FIGS. 8 and 9 has an angled slot on one side thereof, the slot of which is the government of the chamber 119. It extends from the bottom to the bottom and spans the partition plate for completely dividing the chamber 119. The size and shape of the slot is such that the swinging plate is tilted in a wide range while preventing rotation. In operation of the device, water or other fluid under pressure enters the chamber 119 through the inlet pipe 114 on one side of the divider. The water gradually moves the disk 127 and causes the disk 127 to be continuously and gradually inclined with a continuous flow of water as the frontal motor acts. This then causes the discharge rod 128 to perform orbital motion without the occurrence of any rotational motion. Thus, specific points at both ends of the discharge rod 128 draw a circle when the discharge rod 128 is operated by the frontal motor. This orbital motion is transmitted directly to the polishing pad 141 by universal joint connection.

When the working fluid moves completely around the chamber 119 and to the opposite side of the divider, the fluid flows out of the chamber through the discharge pipe 151. The discharge pipe 151 communicates with the chamber 119 and extends into the circular plate 152 mounted on the base of the hemispherical housing 111 in the inlet pipe 114. According to the present invention, a pair of discharge pipes 153 are provided in communication with the circular pipe 152 to allow the water to flow onto the surface to be polished. This provides a very desirable grinding action for wet polishing and cleaning.

The potential for dangerous shocks in electric sanders when used in wet has greatly hampered effective wet polishing operation. Manual grinding operations had to be performed when wet grinding was required. This invention by hydraulic motor has no electrical risk and water can be easily obtained. Moreover, the wet sander of the present invention can also be used for underwater polishing of ships and the like.

An advantageous direct connection between the discharge rod 128 and the polishing pad 141 transfers the orbital motion of the motor directly to the polishing pad 141 because the bootable member 138 is bent in the transverse direction. This provides a very desirable polishing operation because the orbital polishing operation can be most easily used and controlled. Moreover, the direct connection between the frontal motor and the sander can make the motor control simple.

In any of its various forms, the frontal exercise device of the present invention is extremely simple, inexpensive and mass produced by the use of precise plastic casting technology. Thus, the upper and lower motor housings can be easily molded by plastic injection molding technology. Similarly, a rocking plate consisting of a disk and a central sphere can also be easily injection molded to the required precision.

By the direct use of orbital frontal movement, the motor itself can be made extremely simple. In some instances, only a single moving part is required. In addition, the motor is made in a very unfavorable form of relatively slow speed and high rotational motion, suitable for a variety of applications in the home.

Claims (1)

To drive the motor housings 10, 11, 111, swing plates 20, 21, 126, 127 mounted in the motor housing freely inclined within a predetermined limit, and the swing plate; A fluid operated frontal locomotive consisting of means (36, 114) in communication with said housing and discharge shaft members (28, 128) associated with said oscillating plate for providing access of fluid, wherein the contact type operation Having a mechanism (47, 141), at least a portion of the discharge shaft member protrudes out of the motor housing, the protruding portion of the discharge shaft member is operatively directly connected to the work mechanism, and the contact type A fluid actuated frontal exercise device, characterized in that a work tool is movable through the track without rotation by the discharge shaft member.