US20030143935A1 - Ergonomically friendly orbital sander construction - Google Patents
Ergonomically friendly orbital sander construction Download PDFInfo
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- US20030143935A1 US20030143935A1 US10/373,116 US37311603A US2003143935A1 US 20030143935 A1 US20030143935 A1 US 20030143935A1 US 37311603 A US37311603 A US 37311603A US 2003143935 A1 US2003143935 A1 US 2003143935A1
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- set forth
- orbital sander
- housing
- columns
- shaft
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/03—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor the tool being driven in a combined movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/007—Weight compensation; Temperature compensation; Vibration damping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
- B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
- B24B55/105—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with oscillating tools
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
Abstract
A random orbital sander including a housing, a motor having a vertical axis in the housing, a pad coupled to the motor, a face on the pad extending substantially perpendicularly to the vertical axis, a shroud surrounding the pad, an opening in the shroud, and a dust discharge tube having an inner end in communication with the opening and an outer end on the dust discharge tube end extending at an acute angle to the face of the pad. An orbital sander wherein the pad is supported from the sander housing by columnar units located on opposite sides of the motor. A bore in the motor shaft conducts compressed air through the chamber housing the bearings which support the spindle which mounts the pad.
Description
- The present application is a continuation-in-part of application Ser. No. 09/408,192, filed Sep. 29, 1999, which is a continuation-in-part of application Ser. No. 08/787,873, filed Jan. 23, 1997, now U.S. Pat. No. 6,004,197.
- Not Applicable
- The present invention relates to an improved ergonomically friendly surface-treating tool in which a flat surface of a pad engages the surface of a workpiece for the purpose of abrading or polishing it and more particularly to an improved orbital sander.
- By way of background, in operation, orbital sanders create forces at the sanding surface which are transmitted back to the operator's hand and arm through a lever which is the height of the orbital sander between the face of the sanding disc and the top of the casing at the vertical centerline of the sander. Therefore, if this height is as short as possible, the operator's effort in overcoming the forces produced at the face of the sanding disc are less than if the height was greater.
- In orbital sanders it is desirable that, in addition for the height of the tool being as small as possible, the connection between the housing and the pad should be sufficiently flexible to permit good orbital action but it should also provide good columnar strength so that the pad will oscillate in a very close plane, that is, movement in a vertical direction should be limited as much as possible.
- In prior orbital sanders there were various types of connections between the housing and pad. In one type, a central relatively soft rubber post connected the pad to the housing. While this provided sufficient orbital flexibility, it permitted the pad to move out of a desired plane. In another type, thin rigid plastic multi-columnar post units were located at the corners of the pad between the pad and the housing. These thin rigid post units provided good columnar stability so as to confine the pad to a desired plane, but they had to be relatively long so as to be sufficiently flexible laterally to provide good orbital action, thereby increasing the height of the sander.
- In addition, in all prior orbital sanders, the abrasive dust enters the housing containing bearings which support the spindle which carries the pad, thereby shortening the bearing life and also causing the pad to operate out of its desired plane. This is especially pronounced in the type of orbital sanders using central vacuum systems wherein a high volume of air is drawn through the sander housing to carry away the abrasives and foreign particles. This causes eddy currents at the various sharp edges including the edges of the eccentric housing which contains the bearings which mount the spindle to which the pad is attached. Abrasives and foreign particles may thus enter the bearing area because they are sucked in to this area because of changes in positive and negative pressures due to the operation of the tool. One attempt to reduce the amount of foreign matter entering the bearing area is shown in U.S. Pat. No. 4,854,085 which utilized a triple seal. This approach did increase the bearing life to a certain degree. It is with overcoming the foregoing deficiencies of the prior art that the present invention is concerned.
- It is one object of the present invention to provide an improved orbital sander which has a relatively low height which contributes toward making the sander ergonomically friendly and which has good columnar strength between the housing and the pad so as to tend to confine the pad to an orbital plane while providing sufficient lateral flexibility for good orbital action.
- Another object of the present invention is to provide an unique mounting between the housing and pad of an orbital sander which provides good lateral flexibility of the pad while tending to confine it to an orbital plane of operation.
- A further object of the present invention is to provide an improved structural arrangement for essentially preventing foreign matter from entering the eccentric housing containing the spindle bearings of an orbital sander, thus prolonging the life of the bearings to a much greater extent than was heretofore possible by the use of prior types of seals. Other objects and attendant advantages of the present invention will readily be perceived hereafter.
- The present invention relates to an orbital sander comprising a housing, a compressed air motor in said housing, a pad support secured to said motor, and first and second elongated rows of spaced plastic columns located on opposite sides of said motor and located between said housing and said pad support.
- The present invention also relates to an orbital sander as set forth in the preceding paragraph including a shaft in said motor, a rotor mounted on said shaft, a compressed air duct in said motor for conducting compressed air to said rotor, an eccentric housing mounted on said shaft, a chamber in said eccentric housing, at least one bearing in said eccentric housing, said pad support being secured to said eccentric housing, and means in said motor for conducting compressed air to said chamber.
- The present invention also relates to a plastic columnar unit for an orbital sander comprising an upper bar member, a lower bar member, and a row of a plurality of spaced columns between said upper and lower bar members.
- The various aspects of the present invention will be more fully understood when the following portions of the specification are read in conjunction with the accompanying drawings wherein:
- FIG. 1 is a fragmentary plan view of a central vacuum orbital sander with the vacuum hose and the compressed air hose connected to the orbital sander;
- FIG. 1A is an enlarged fragmentary cross sectional view taken substantially along line1A-1A of FIG. 1;
- FIG. 1B is a cross sectional view taken substantially along line1B-1B of FIG. 1A;
- FIG. 1C is a cross sectional view taken substantially along line1C-1C of FIG. 1A;
- FIG. 1D is a cross sectional view taken substantially along line1D-1D of FIG. 1A;
- FIG. 1E is a cross sectional view taken substantially along line1E-1E of FIG. 1A;
- FIG. 1F is a cross sectional view taken substantially along line1F-1F of FIG. 1A;
- FIG. 2 is a fragmentary side elevational view of the orbital sander of FIG. 1;
- FIG. 2A is a fragmentary cross sectional view taken substantially along
line 2A-2A of FIG. 2 and showing the support structure for the dust discharge tube; - FIG. 2B is a fragmentary extension of the top of the structure shown in FIG. 2A;
- FIG. 3 is a fragmentary view, partially in cross section, taken substantially along line3-3 of FIG. 1, and showing the relationship between the shroud and the dust discharge tube and the discharge hose; and also showing the relationship between the motor exhaust tube and the dust discharge tube;
- FIG. 4 is a fragmentary plan view of a self-generated vacuum orbital sander with the vacuum hose and the compressed air hose connected to the orbital sander and to each other;
- FIG. 5 is a fragmentary side elevational view of the sander of FIG. 4;
- FIG. 6 is an enlarged fragmentary cross sectional view taken substantially along line6-6 of FIG. 5 and showing the structure of the motor exhaust tube, the dust discharge tube containing an aspirator, the connection therebetween and the connection between the dust discharge tube and the flexible hose;
- FIG. 6A is a cross sectional view taken substantially along
line 6A-6A of FIG. 6; - FIG. 7 is a fragmentary enlarged cross sectional view taken substantially along line7-7 of FIG. 4 and showing the compressed air valve inlet structure;
- FIG. 8 is a fragmentary cross sectional view taken substantially along line8-8 of FIG. 7 and showing the compressed air flow adjusting valve in a full open position;
- FIG. 9 is a view similar to FIG. 8 but showing the valve in a partially open position;
- FIG. 10 is a view similar to FIG. 8 and showing the valve in a fully closed position;
- FIG. 11 is an enlarged fragmentary enlarged cross sectional view similar to FIG. 7 but showing the compressed air inlet valve in an open position;
- FIG. 11A is an enlarged perspective view of the compressed air flow control valve;
- FIG. 11B is a side elevational view of the compressed air flow control valve;
- FIG. 12 is a fragmentary cross sectional view taken substantially along line12-12 of FIG. 11 and showing the relationship between the position between the compressed air inlet valve and the air flow adjusting valve when the latter is in a fully open position;
- FIG. 13 is a view similar to FIG. 12 but showing the relationship when the air flow adjusting valve is in a partially open position;
- FIG. 14 is a view similar to FIG. 12 but showing the relationship when the air flow adjusting valve is in a closed position;
- FIG. 15 is a side elevational view of a central vacuum type orbital sander showing the various dimensions which are considered in determining ergonomics;
- FIG. 16 is a side elevational view of a self-generated vacuum type of orbital sander showing the various dimensions which are considered in determining ergonomics;
- FIG. 17 is a cross sectional view taken substantially along line17-17 of FIG. 1F and showing a modification of the rotor shaft for positively pressurizing the bearings in the eccentric housing;
- FIG. 18 is an exploded view of the rotor shaft and related structure of FIG. 17;
- FIG. 19 is a modified form of FIG. 1A showing another embodiment for conducting compressed air to the bearings in the eccentric housing;
- FIG. 20 is a view similar to FIG. 19 and showing a duct in the form of a slot in the rotor shaft for conducting compressed air to the bearings in the eccentric housing;
- FIG. 21 is a view similar to FIG. 19 and showing another embodiment of a duct which includes an inclined duct or bore in the rotor shaft for conducting compressed air to the bearings in the eccentric housing;
- FIG. 22 is a perspective view of the improved orbital sander of the present invention having the unique columnar mounting units between the housing and the pad;
- FIG. 23 is a cross sectional view taken substantially along line23-23 of FIG. 22;
- FIG. 24 is a cross sectional view taken substantially along line24-24 of FIG. 23;
- FIG. 25 is an exploded view of the orbital sander of FIGS.22-24;
- FIG. 26 is an enlarged exploded view of a portion of FIG. 25 showing the lower housing section and the columnar units which join the pad to the housing sections;
- FIG. 27 is a fragmentary perspective view showing the lower housing sections assembled with the columnar units;
- FIG. 28 is a cross sectional view taken substantially along line28-28 of FIG. 27;
- FIG. 29 is a cross sectional view of the columnar unit taken substantially along line29-29 of FIG. 26;
- FIG. 29A is a view showing the preferred structure of a column of the columnar unit;
- FIG. 30 is a cross sectional view taken substantially along line30-30 of FIG. 29; and
- FIG. 31 is a cross sectional view taken substantially along line31-31 of FIG. 29.
- The present invention relates to an orbital sander which has a relatively low height and thus is ergonomically friendly, while also providing good columnar strength to maintain the pad in a close orbital plane and also permitting good orbital flexibility. Its low height is due in part to the compressed air motor which drives it, and this motor is the same that is used in the three previous types of random orbital sanders which are described hereafter. Its low height is also due to the use of a columnar connection between the housing in the pad which provides good columnar strength while providing good orbital flexibility.
- The compressed air motor which is used in the orbital sander of the present invention is also used in the three basic types of random orbital sanders which are described hereafter. The first and most rudimentary type is the non-vacuum type which does not have any vacuum associated with it for the purpose of conveying away the dust which is generated during a sanding operation. The second type is the central vacuum type which has a vacuum hose attached at one end to a central vacuum source and at its other end to a fitting which is in communication with the shroud of the sander so as to create a suction which carries away the dust which is generated during a sanding operation. The third type is a self-generated vacuum type wherein the exhaust air from the air motor is associated with an aspirator in communication with the shroud for carrying away the dust which is generated during a sanding operation. While not specifically shown in the orbital sander of the present invention of FIGS.22-31, it will be appreciated that the above features of the central vacuum type and self-generated vacuum type may be incorporated therein.
- Summarizing in advance, the orbital sander of the present invention shown in FIGS.22-31 includes the compressed air motor of the foregoing type of sanders which, in part, permits the sander of the present invention to have a relatively low height, which thus reduces stresses experienced by the operator. However, it will be appreciated that the elongated rows of spaced plastic columns which secure the pad plate to the housing in FIGS. 22-31 may be used with other motors which do not have the low height of the motor described hereafter.
- In FIGS. 1, 1A,2, 2A, 2B and 3 a central vacuum type of random
orbital sander 10 is disclosed wherein aflexible vacuum hose 11 is connected between thedust discharge tube 12 and theshroud 13 which surrounds thesanding disc 14. However, the only difference between the central vacuum typeorbital sander 10 and a non-vacuum type is that the latter does not have thedust discharge tube 12 or theflexible hose 11. The basic structure which is common to all three types of orbital sanders is shown in FIG. 1A which is taken along line 1A-1A of FIG. 1. The sander of the foregoing figures is being described hereafter for the purpose of setting forth the structure of the compressed air motor used in the orbital sander of the present invention shown in FIGS. 22 et seq. which contributes in part to the low height of the sander of the present invention. - The basic construction of the random orbital sander of FIGS.1-3 includes a
housing grip 15 of a rubber type material which is mounted onplastic housing 17 and secured thereon by coacting withribs housing 17.Housing 17 also includes alower portion 22 which terminates at askirt 23 having anannular rib 24′ thereon onto which flexibleplastic shroud 13 is mounted with a snap fit. - An air motor is located within
housing 17, and it includes acylinder 24 in which arotor 25 keyed toshaft 27 bykey 28 is mounted. The ends ofshaft 27 are mounted inbearings 29 and 30 (FIG. 1A), and asnap ring 31 retainsshaft 27 in position. Thecylinder 24 is part of a cylinder assembly which includes anupper plate 32 and alower plate 33. Thebearing 29 is mounted intoannular portion 63 ofupper plate 32, and thebearing 30 is mounted intoannular portion 28 oflower plate 33. Theend plates planar surfaces cylinder 24 to thereby provide the required sealing with the adjacent portions of thecylinder 24. Apin 37 has an upper end which is received in abore 39 inhousing 17.Pin 37 passes through acircular bore 40 inend plate 32 and through a bore 41 incylinder 24 and into abore 42 inend plate 33, thereby aligning theend plates 32 an 33 with thecylinder 24. The outer circular ends 43 and 44 ofend plates internal surface 45 ofhousing 17. A threadedlock ring 47 is threaded into tappedportion 49 ofhousing 17 to thus cause theupper surface 50 ofend plate 32 to bear against the adjacent surface ofhousing 17. An O-ring 51 in a groove inlock ring 47 bears against theundersurface 52 oflower end plate 33.Rotor shaft 27 has aneccentric housing 57 formed integrally therewith into whichbearings 55 are mounted and retained therein bysnap ring 56 which bears onBelleville washer 58.Housing 57 is an eccentric having twocounter-weights stub shaft 53 is press-fitted intobearings 55 and it is formed into anut 59 at its outer end. Thus,rotor shaft 27 will rotate andeccentric housing 57 will simultaneously rotate withshaft 27. A threadedshaft 60 extends upwardly from sandingdisc 14 and is received instub shaft 53. - As can be seen from FIGS. 1A and 1F a compressed
air inlet conduit 38 is in communication withbore 134 incylinder 24, and bore 134 is in communication withbore 134′ which extends axially between upper cylinder surface 50 (FIG. 1D) and lower cylinder surface 35 (FIG. 1A). Bore 134′ is in communication with groove 136 (FIG. 1D) inupper cylinder surface 50 and a like groove (not shown) inlower cylinder surface 35. Whenupper plate 32 is in assembled position, it causesgroove 136 to be a conduit leading to chamber 138 (FIG. 1D) withincylinder 24.Lower plate 33 forms a similar conduit with the groove which corresponds to groove 136 inlower cylinder surface 35. A plurality ofvanes 136′ (FIG. 1D) are slidably mounted inradial slots 139′ inplastic rotor 25 and their outer ends contact the inner surface ofcylinder 24 because they are forced outwardly by air pressure which is conducted to the inner ends ofslots 139′ bygroove 140′ (FIG. 1B) in thesurface 64 ofplate 32. Groove 140′ is in communication withgroove 136. Lower plate 33 (FIG. 1C) has a groove 141′ which corresponds to groove 140′ and is in communication with a groove which corresponds to groove 136. Air is exhausted fromchamber 142′ of cylinder throughnarrow slots 143′ (FIG. 1F) a few millimeters wide in the central portion ofcylinder 24, and this exhaust air passes intochamber 144′ betweencylinder 24 andhousing 17, and it thereafter passes through bore 142 (FIGS. 1F and 3) intoexhaust conduit 87. - At this point it is to be noted that the air motor is of a conventional type which has been constructed for causing the overall height of the above-described unit in FIG. 5 to be lower than existing orbital sanders having a similar construction and for causing it to have a lower weight.
- The modifications which have been made are as follows: The top60 of
housing 17 is 2.0 millimeters thick. Additionally, the clearance at 61 between theinner surface 62 ofhousing 17 and theedge 63 is 0.6 millimeters. In addition, the thickness ofend plate 32 betweensurface 50 andsurface 64 is 2.5 millimeters, and the thickness ofend plate 33 betweensurface 35 andsurface 67 is 2.5 millimeters. Thecylinder 24′ has an axial length of 20 millimeters. In addition, theclearance 69 is 0.5 millimeters. Also,nut 59 is 4.0 millimeters thick. The eccentric has a height of 21.4 millimeters. All of the foregoing dimensions have caused the air motor to have a height of 82.92 millimeters from the top ofhousing 17 to theface 70 ofpad 14 at thevertical centerline 71. This compares to the lowest known existing prior art structure which has a height of approximately 89 millimeters to thereby reflect a difference of 6.08 millimeters or approximately 7%. In addition, the use ofaluminum end plates outer surface 72 ofcylinder 24 to be 2 millimeters and the absence of an upper flange which corresponds to flange 73 and the thinning ofaluminum end plate 33 and the thinning ofnut 59 reduces the weight of the orbital sander of FIG. 5 to 0.68 kilograms as compared to a similar prior art sander which has a weight of 0.82 kilograms, thereby reflecting a difference of approximately 0.14 kilograms or about 17%. As noted above, the lesser weight makes it easier for a person to handle the orbital sander. - As noted above, the basic structure of the air motor is a well known conventional type having 150 watts minimum power at 0.61 bar air pressure minimum. The above features of the presently described air motor cause the orbital sander of FIGS.1-21 to be of a relatively low height and a relatively low weight. Otherwise, the internals of the air motor are conventional.
- The reduced height of
sander 10 is depicted by letter A in FIG. 15. The fact that the entire height ofsander 10 is lower, results in the lowering of the centerline of the outlet of the dust discharge tube to a dimension B and also results in the lowering of the centerline of thecompressed air inlet 80 to a dimension C. As noted above, the lowering of dimensions B and C also results in enhancing the ease of handling of theorbital sander 10. - The dust discharge tube12 (FIG. 3) of
sander 10 has acenterline 86 and is inclined to the horizontal at an angle a. Thedust discharge tube 12 consist of alonger section 83 and ashorter section 84 which has acenterline 88 and which has a circular outlet which mounts oncylindrical stub pipe 85 formed integrally withshroud 13. The dustdischarge tube portion 83 is located immediately below the motor exhaust inlet fitting 87. The airmotor exhaust conduit 87 is withinhousing portion 90 which is molded integrally withhousing 17.Housing portion 90 also contains compressed air inlet conduit 80 (FIGS. 1 and 2A). Thedust discharge tube 12 is also attached tohousing portion 90 by abolt 91 which extend throughhorizontal portion 92 ofunit 90 and also extends throughweb 93 which spanslegs dust discharge tube 12. Thus,dust discharge tube 12 is firmly supported onstub tube 85 and onhousing portion 90 which contains the airmotor exhaust conduit 87 and thecompressed air inlet 80. - As noted briefly above, since the outer end portion89 (FIG. 3) of
dust discharge tube 12 is inclined upwardly, the adjacent portion offlexible vacuum hose 11 will also be inclined upwardly to thus cause it to droop further away from theoutlet 89 then if the latter was horizontal. This tends to lessen the possibility that the flexible hose will contact the workpiece which could create a frictional drag. In addition, as can be seen from FIG. 2, since theflexible hose 11 is received directly indust discharge tube 12, a fitting which is otherwise used at the outer end of a dust discharge tube in the prior art is eliminated which thus causes the extremeouter end 81 ofdischarge tube 12 to be at a distance E (FIG. 15) from thevertical centerline 71 of the sander. It will be appreciated that the shorter that the distance E is, the shorter is the lever arm tending to tilt thesander 10 and thus for any given weight at theouter end 81 ofdust discharge tube 12, the shorter the lever arm E is, the lower will be the tilting force which is produced and the lower will be the force required by the operator to overcome this tilting force. - The compressed air inlet structure permits a very gradual varying of the pressure which is supplied to the air motor. In this respect, the
compressed air inlet 80 includes a valve 100 (FIG. 1A) which is biased againstseat 101 byspring 102 which has itsouter end 103 bearing against the end of hollow compressed air fitting 104 which is threaded intohousing portion 90. Fitting 104 (FIGS. 1, 2, 4 and 5) receives the end ofcompressed air hose 106 with a conventional connection.Hose 106 is attached tovacuum hose 11 bystrap 108. In order to openvalve 100 from the position shown in FIGS. 1A and 7 to the position shown in FIG. 11,lever 105 is pivotally mounted at 107 onboss 109 which is molded integrally withhousing portion 90. Whenlever 105 is depressed, it will depress pin 110 from the position shown in FIG. 7 to the position shown in FIG. 9 against the bias ofspring 102 in view of the fact that theextension 111 ofvalve 100 is received in abore 112 at the lower end ofpin 110. Whenlever 105 is released, thespring 102 will returnvalve 100 to the position of FIG. 7 and pin 110 will be raised to the position of FIG. 7 by virtue of its connection withvalve extension 111. The foregoing structure ofvalve 100 is conventional. - A flow adjusting valve115 (FIGS. 1A, 7, 11A and 11B) is located in
bore 117 ofhousing portion 90 and it is retained therein by snap ring 119 (FIG. 7).Bore 117 has awall 118. An O-ring 120 is mounted in agroove 122 ofbase 126 of valve body 121 (FIG. 11A). O-ring 120 performs both a sealing function and a frictional holding function to retainvalve 115 in any adjusted position inbore 117. The valve consists of aportion 123 of a cylinder extending upwardly frombase 126 and having an outercylindrical surface 124. Ahandle 125 is molded integrally withvalve body 121. Theupstanding wall 123 includes anaperture 127 and aninclined groove 129 in communication withbore 127. Theouter surface 124 is in sliding contact with wall 130 ofbore 117. Whenvalve 121 is in a fully open position shown in FIG. 8, bore 127 is in communication with bore 38 (FIG. 1A) ofhousing 17.Bore 38 terminates atwall 132 ofair motor cylinder 25. An O-ring 133 is inserted in wall 132 (FIG. 1F) aroundbore 134 which provides a seal with the outer end ofconduit 38. The foregoing structure is well known in the art. - As noted above,
valve 115 is fully open in the position shown in FIG. 8. In FIG. 9 it is partially open and it can thus be seen that the air flow must pass alonginclined groove 129 which restricts the opening toconduit 38. It will be appreciated that the more thatwall 121 is moved in a counterclockwise direction, the smaller will be the path of communication leading toduct 38. In FIG. 10 the valve is shown in a fully closed position wherein thewall 124 completely closes offduct 38. At this time theedge 135 engagesshoulder 137 to define the limit of counterclockwise movement ofvalve 115, as shown in FIG. 10. The clockwise limit of movement ofwall 124 is determined whenedge 139 engagesshoulder 140, as shown in FIG. 10. The range of movement ofvalve 125 is 90° from a full open position to a full closed position. - FIGS. 12, 13 and14 correspond to FIGS. 8, 9 and 10, respectively, but are taken along cross section line 12-12 above
valve extension 111 whereas FIGS. 8, 9 and 10 are taken throughvalve extension 111 in FIG. 7. - In FIG. 3 motor
air exhaust housing 87 is shown which is in communication with the exhaust of air motor cylinder 24 (FIG. 1A) through conduit 142 (FIG. 3).Housing 90 includes amuffler 143 which is held in position inbore 144 byplug 145 and the exhaust air exitshousing 90 throughperforated cap 147. - In FIGS. 4, 5,6 and 7 a self-generated vacuum random
orbital sander 150 is shown. This sander has the same internal structure described above relative to the central vacuum type, as shown in FIG. 1A. In addition, it has the same type ofsanding pad 14 and it has the same type ofvalve 115 described above which is located inhousing unit 90. Theinlet valve 115 is identical tovalve 125 described above in FIGS. 1A, 8, 9 and 10. - The self-generated vacuum random
orbital sander 150 includes adust discharge tube 151 which is also inclined to the horizontal at an angle a (FIG. 5).Dust discharge tube 151 includes anelongated portion 152 which has a centerline 156 (FIG. 16) and is received inelbow 153 which has acenterline 158 and which in turn is mounted onstub pipe 154 ofshroud 13. Atubular strap portion 155 is formed integrally with portion 156.Motor exhaust unit 159 contains aporous muffler 160. A fitting 161 extends throughstrap 155 and is threaded intomotor exhaust housing 159 at 162 and it includes abore 163 and a plurality of apertures leading frombore 163 toconduit 165 which is the entry portion ofbore 167 which functions as anaspirator 176 in conjunction with theareas 169 and 170 of elongated dustdischarge tube portion 150. It is to be especially noted that the dust discharge fromshroud 13 enters the straight portion ofdust discharge tube 152 and the fact that there is no sharp bend in the immediate vicinity ofareas 171 and 169, there will be greater efficiency than if such a bend existed immediately adjacent toconduit 165. - In addition to the foregoing, the flexible
dust discharge hose 11 is received in theenlarged portion 172 at the outer end ofdust discharge tube 151 in the same manner as described above relative to the embodiment of FIGS. 1-3. The outer portion 170 ofaspirator 176 is nested within the innermost portion of dust discharge hose 11 (FIG. 6), thereby contributing to the overall relative shortness ofdust discharge tube 151. - It is to be noted that the
dust discharge tube 151 is inclined at an angle a to the horizontal and thatelbow 153 is inclined at an angle b to the horizontal. - It is to be further noted from FIG. 16 that the centerline of
dust discharge tube 151 at the outer end ofportion 172 is a distance E from thevertical centerline 71 of the randomorbital sander 150.Dust discharge tube 151, in addition to being inclined, is relatively short so that any downward force at its outer end will be relatively close to thevertical centerline 71 and will therefore create less of a force which the operator must oppose than if it were longer. - The following table sets forth the dimensions A through E and angles a and b shown in FIGS. 15 and 16.
TABLE DIMENSIONS IN MILLIMETERS OF VARIOUS PORTIONS OF DIFFERENT TYPES OF ORBITAL SANDERS SELF-GENERATED CENTRAL NON-VACUUM VACUUM VACUUM A 82.92 82.92 82.92 B — 47.45 40.42 C 58.42 58.42 58.42 D 80.00 80.00 80.00 E — 147.28 130.05 Angle a — 10° 10° Angle b — 130° 130° - In the above table, the dimension E is 130.05 millimeters for the central vacuum sander and 147.28 millimeters for the self-generated vacuum sander. However, if the threaded connection at outer end portion89 (FIG. 3) of
dust discharge tube 12 of the central vacuum sander is decreased by two threads at 5 millimeters each, then the 130.05 dimension E would be decreased about 10 millimeters to about 120 millimeters. Also, if the threadedend portion 172 of the self-generated vacuum sander is decreased by two threads at 5 millimeters each, the 147.28 dimension E would be decreased 10 millimeters to about 137 millimeters. It is possible with a slight loss of ergonomics to lengthen the dimension E for the central vacuum and self generated vacuum sanders by about 10 millimeters to about 140 millimeters and about 157 millimeters, respectively. However, when the foregoing lengthened dimensions E are considered in combination with the lower height dimension A, each of the foregoing sanders will still be more ergonomically friendly than sanders not having this combination of dimensions. - As noted briefly above, the closest known prior art sander of the above-described type shown in FIGS.1-21 has a height dimension of approximately 89 millimeters as compared to height dimension A of 82.92 millimeters of the above-described sander. As further noted above there is a difference of about 7% between the two dimensions. The 82.92 millimeter dimension is the ultimate low dimension which was able to be achieved while still retaining the various component parts of the sander in a commercially operable manner for providing the desired output parameters noted above and also recited hereafter. However, it will be appreciated that the height dimension A of the present sander can be increased a few millimeters by not reducing the thickness and height of the various components as much as was done. Accordingly, it is contemplated that the height dimension A can be increased to 86 millimeters which would still be a reduction in height from 89 millimeters or approximately 3.5%.
- Additionally, as noted above the closest known prior art sander of the present type has a weight of 0.82 kilograms as compared to the weight of the present sander of 0.68 kilograms, or a difference of 0.14 kilograms or a weight reduction of approximately 17%. It will be appreciated that the weight of the sander of the present invention may be increased to 0.75 kilograms which would be a difference of approximately 0.07 kilograms, and this would be a weight reduction of approximately 8.3% which also could be significant.
- The preferred angle a shown above in the table is an acute angle of 10°. However, this angle may be as small as about 5° and as high as about 30°. The exact acute angle for any specific device will depend on various factors such as the length of the motor exhaust body which is located directly above it and the vertical spacing between the shroud outlet and the motor exhaust body.
- As noted above, the angle b is 130°, but it can be any obtuse angle consistent with the acute angle a of the dust discharge tube.
- The non-vacuum sander, the
central vacuum sander 10 and the self-generatedvacuum sander 150 utilize a 150 watt power air motor which operates from a source providing 6.1 bar air pressure and the air motor is capable of providing up to 10,000 revolutions per minute. - It is to be especially noted that the foregoing discussed dimensions are intended to preferably apply to the three types of random orbital sanders discussed above relative to FIGS.1-21, and while the dimensions of the air motor are preferably incorporated in the orbital sander of FIGS. 22 et seq., the other dimensions listed in the above table relating to the angles and dimensions of the hose connections are optional. It will also be appreciated that the connections between the housing and the pad of the orbital sander shown in FIGS. 22 et seq. may be used independently with other types of motors, and that such connections are not restricted to the use with an air motor having the dimensions discussed above.
- In accordance with another aspect of the present invention, the bearings276 (FIG. 23), which are analogous to the bearings 55 (FIGS. 1A and 17), are supplied with compressed air and a one-way valve which prevents foreign matter from effectively entering the
eccentric housing 57 in which they are located. In this respect, it is to be noted from FIGS. 1A, 1B, 1C, 1D and 1F that compressed air is conducted from bore 38 (FIGS. 1A and 1F) throughbore 134 and intobore 134′. The compressed air then passes into groove 136 (FIG. 1D) incylinder surface 50 and a counterpart groove (not shown) incylinder surface 35. The compressed air then passes throughgroove 140′ (FIG. 1B) insurface 64 ofplate 32 fromgroove 136, and it also passes through groove 141′ (FIG. 1C) from the counterpart (not shown) ofgroove 136. As expressed above, the compressed air emanating fromgrooves 140′ and 141′ enter theradial slots 139′ (FIG. 1D) of therotor 25 to forcevanes 136′ outwardly. - There is a working clearance between the parts of air motor consisting of
cylinder 24 androtor 25 andplates grooves 140′ and 141′ will pass betweenplate 32 androtor 25 and will also pass betweenplate 33 androtor 25. This compressed air will then enter rotor keyway slot 180 (FIGS. 1A, 1D and 1F), and then pass aroundkey 181 which is located inkey slot 182 inshaft 27. - In accordance with one embodiment of the present invention, the
shaft 27 of the air motor has been modified to beshaft 27′ shown in FIGS. 17 and 18. In this respect, across bore 183 has been drilled inshaft 27′, and a coaxial duct in the form of abore 184 has been drilled in the lower part ofshaft 27′ in communication withbore 183, and acounterbore 185 has been drilled in the lower end ofbore 184.Counterbore 185 is in communication with thechamber 187 ofeccentric housing 57 in whichbearings 55 are located. As can be seen from FIGS. 1A and 17, there is asmall space 189 inchamber 187 above theuppermost bearing 55. Afilter disc 188, which is fabricated of spunbonded polyester, and a duckbill one-way valve 190 are located incounterbore 185 and retained therein by retainingsleeve 191 which is press-fitted intocounterbore 185 and bears against the enlargedannular portion 186 ofvalve 190. Thefilter 188 filters the compressed air passing through the duckbill valve. As shown in FIG. 18, there is aspacer 192 betweenbearings 55, and there is aspacer 193 betweenlower bearing 55 andBelleville washer 58.Spacers stub shaft 53, and their outer diameters bear on the inner races of bearing 55 without obstructing the spaces between the inner and outer races. Theupper spacer 192 spaces the twobearings 55 so that their outer races do not contact each other. Thelower spacer 193 also functions somewhat as a labyrinth seal to create a tortuous path back to thelower bearing 55 when air tends to suck upwardly into thelower bearing 55 when the motor stops. The foregoing structure thus causes air flow intochamber 187 and throughbearings 55 and through theannular space 196 betweenBelleville washer 58 andportion 195 of stub shaft orspindle 53 into the space above sandingdisc 14. This pressure is more positive than the pressure outside ofeccentric housing 57, thereby preventing sanding dust and other foreign materials from enteringbearings 55 inchamber 187 from the area abovepad 14. It is to be noted that sinceduckbill valve 190 is a one-way valve, the air inchamber 187 cannot be drawn back intobore 184 when the air motor inherently functions as a pump when the compressed air flow thereto is terminated, thereby obviating the induction of foreign material laden air intochamber 187. - In FIG. 19 another embodiment of the present invention is disclosed. All parts which are identical to the numerals in FIG. 1A represent identical elements of structure. In FIG. 19
motor shaft 27 has been modified by creating a duct in the form of a bore 200 therein which extends from the top ofshaft 27 to counterbore 201 which is in communication withspace 189 withineccentric housing chamber 187. Aduckbill valve 202 is located incounterbore 201 and is retained therein by press-fittedsleeve 203, as in the embodiment of FIGS. 17 and 18. A filter 204 which is of the same type described above and designated 188 is located abovevalve 202 withincounterbore 201. - Bore200 receives its air from
clearance space 61. In this respect, there is leakage betweenshaft 27 andplate 32, and this air also passes throughupper bearing 29 to effect cooling thereof and thereafter it passes intoclearance space 61 from which it passes into the top of bore 200 which leads to filter 204 andduckbill valve 202. The air emanating fromduckbill valve 202 functions in the same manner as described above relative toduckbill valve 190 of FIGS. 17 and 18. - It is to be especially noted that in the embodiments of FIGS. 17, 18 and19, the only modification has been to the existing shaft of the random orbital tool, and that there has been no requirement for any ducts in the
cylinder 24 in whichrotor 25 rotates. - Another way of conducting compressed air to bore200 in FIG. 19 is to drill a small hole (not shown) in
upper plate 32 so that compressed air will pass through this hole, through bearing 29 (FIG. 1A) and throughspace 61 into duct or bore 200. This hole may receive its air fromduct 140′ (FIG. 1B) or from the clearance betweenplanar surface 34 ofplate 32 andcylinder 24. Also, the hole inplate 32 need not be directed to bearing 29, but may be positioned to communicate withclearance space 61 through the clearance between theplanar surface 34 ofplate 32 andcylinder 24 and through annular portion 63 (FIG. 1B) ofplate 32. Also bore 200 may obtain compressed air because of leakage around the outercircumferential edge 43 ofplate 32 intoclearance space 61. - Still another way of providing compressed air to bearing
chamber 187 is shown in FIG. 20, and it would be to form a duct in the form of a slot 211 on the outside of the portion ofshaft 27 which is abreast of bearing 30 and drill ahole 212 in line with slot 211 through the top ofhousing 57 intochamber 187. Slot 211 would have its open side covered by the contiguous inner race of bearing 30. Compressed air could thus pass fromclearance space 213 into bearingchamber 187, theclearance space 213 receiving its compressed air through the clearance between the undersurface ofrotor 25 and the planar upper surface ofplate 33 and throughkeyway 180. In this embodiment the compressed air does not pass through a duckbill valve and filter. - Another way of conducting compressed air to
chamber 187 is shown in FIG. 21 wherein an inclined duct or bore 214 is drilled through the portion ofshaft 27 abreast of bearing 30 andduct 214 is in communication with a counterbore (not numbered) housing a filter and duckbill valve, such as shown and described in FIGS. 17-19 so that there is communication betweenclearance space 213 andsmall space 189 inchamber 187 through the filter and duckbill valve. - It will be appreciated that the various clearances referred to above through which compressed air passes are considered to be ducts within the housing through which compressed air is conducted to bearing
chamber 187. - In FIGS.22-31 the improved
orbital sander 220 of the present invention is shown.Orbital sander 220 is of the same general type shown in FIG. 4, namely, a non-vacuum type of sander which does not have any vacuum associated with it for the purpose of conveying an abrasive dust which is generated during a sanding operation. However, it will be appreciated that it may be of the other types noted above, namely, the central vacuum type which has a vacuum hose attached at one end to a central vacuum source or the type which is a self-generated vacuum type wherein the exhaust air from the air motor is associated with an aspirator in communication with the shroud for carrying the weighted dust which is generated during a sanding operation. - The
orbital sander 220 includes anupper housing section 221 having an integralair inlet duct 222.Lever 223 is pivotally mounted onpin 224 and it functions in the same manner described above relative to FIG. 11, or it can function in any other suitable way known in the art to control the flow of air tocompressed air motor 225 which may be identical in all respects to that shown above in FIGS. 1A through 1F except that theshaft 227 is of a different configuration as are theeccentric housing 229 and thecounterweights housing grip 232 of rubber-type material is mounted onhousing section 221. - A
pad 233 is secured to padbacking plate 234 by a plurality of screws 235 (FIG. 25) which extend through openings, such as 237 inpad 233, and throughopenings 239 inpad backing plate 234 and are received innuts 240 which are molded integrally into the bases orlower bar members 241 ofcolumnar units 242 each having a row of a plurality of spacedplastic columns 243 molded integrally therewith, with saidcolumns 243 being molded integrally withupper bar member 244. Eachbar 244 includesnuts 245 molded therein. While thecolumns 243 of each row are shown in alignment, it will be appreciated that they may be staggered or offset. The columns are of tapered circular cross section throughout and have the dimensions shown in FIG. 29A with their smallest dimension at each midpoint, which is the most flexible part of each column. In other words, the columns flare outwardly from positions substantially at their midpoints. I will be appreciated that the columns may be of other cross sectional shapes, such as cylindrical, and that such shapes could function, but they would not function in the same manner as the specific shape show. It will also be appreciated that the smallest cross sectional dimension of each column need not be located substantially at its midpoint, but can be placed anywhere between its ends. Also, it will be appreciated that there can be more than one reduced cross sectional area in each column. The preferred shape and dimensions of thecolumns 243 are shown in millimeters in FIG. 29A, along with the height dimension of thecolumnar unit 241. - In its more specific aspects, the
base 241 of eachcolumnar unit 242 includes an embedded metal plate 247 (FIGS. 29 and 30). The configuration ofmetal plate 247 is such that it hasapertures 249 therein through which the molded plastic ofbase 241 extends. Thus,plates 249 rigidize bases 241. Also, thenuts 235, in addition to being molded intobases 241, are also set intoplates 247. Thus, each base 241 is essentially reinforced plastic which provides great rigidity. - Each
upper bar member 244 also includes ametal plate 250 confined fully withinupper bar member 244.Metal plate 250 includes a plurality ofapertures 251 similar toapertures 249 oflower bar member 241 through which the molded plastic ofheader 242 extends.Nuts 245, as noted above, are molded into eachupper bar member 244, and these nuts also are in abutting relationship to eachapertured plate 250. - The plastic of
column assemblies 241 is molded polyester and is grade “High Performance” and can be commercially obtained from DuPont Engineering Polymers Company under the trademark HYTREL and is further identified by number 5546. This plastic provides good columnar strength while permitting good lateral flexibility so that thepad 233 secured tolower bar members 241 ofcolumnar units 242 will have a good orbital motion while theplastic columns 243 provide good columnar strength. The outside height dimension acrossbar members - The
columnar units 242 are secured tohousing sections 253 byscrews 254 which extend throughsuitable apertures 255 inhousing sections 253 and are received in nuts 245. Theupper bar members 244 ofcolumnar units 242 fit intorecesses 257 ofidentical housing sections 253. -
Identical housing sections 253 are secured toupper housing section 221 in the following manner.Housing section 221 is identical tohousing section 22 of FIGS. 2 and 1A. In this respect,housing section 221 includes an annular groove 259 (FIG. 23) which receivesridge 260 of each identicallower housing section 253. A ridge 261 (FIG. 23) is received ingroove 262 oflower housing sections 253.Ridge 261 ofupper housing section 221 is of complementary mating relationship to groove 262 in that it is interrupted to receive theridge configurations upper housing sections 253 which act as keys to prevent relative rotation betweenupper housing section 221 andlower housing section 253. Any other suitable connection between theupper housing section 221 andlower housing sections 253 can be used. - The
lower housing sections 253 are secured to each other and toupper housing section 221 by nut and bolt assemblies. In this respect,bolts 265 extend throughbores 267 inlower housing sections 253 and are retained therein bynuts 269 such thatlower housing sections 253 assume an end-to-end abutting relationship such as shown in FIGS. 22 and 27 alongseam 270. - By virtue of the above-discussed construction,
upper housing section 221 is firmly attached tolower housing section 253. Theupper bar members 244 ofcolumnar units 242 are firmly secured tolower housing sections 253, and thepad plate 234 is firmly secured tolower bar members 241 ofcolumnar units 242. There is a space 271 (FIG. 28) between the lower edges oflower housing sections 253 and theupper surface 272 ofpad plate 234. Thus, the only contact betweenpad plate 234 andlower housing sections 253 is throughcolumnar units 242. As noted above,upper bar members 244 are firmly attached to lowerhousing sections 253 andlower bar members 241 ofcolumnar units 242 are firmly attached to padplate 234. Thus, the only connection betweenlower housing sections 253 andpad plate 234 which can yield areplastic columns 243 which extend betweenlower bar members 241 andupper bar members 244 ofcolumnar units 242. - The overall height of the orbital sander along its vertical centerline from the top of
housing grip 232 to the underside ofpad 233 is 98.33 millimeters. However, it will be appreciated that this dimension may be varied for other constructions of orbital sanders. Also, as noted above, thecolumnar units 242 need not be used with the specific low-height compressed air motor described above, but may be used with other types of motors. - The oscillatory motion of
pad 233 is produced in the following manner. Abolt 273 extends throughaperture 274 inpad plate 234 and is threadably received inspindle 275 which is retained with a press-fit in the inner races of thebearings 276 which are located ineccentric housing 229. A pin 279 (FIG. 23), which is fixedly mounted in bore 281 inspindle 271, extends through abore 280 inpad plate 234 to prevent rotation ofpad plate 234 as it is secured to spindle 275 bybolt 273 during assembly, and it also provides an orbital driving connection to the pad during sander operation. In the latter respect, asmotor shaft 282 rotates, pin 281,bolt 273, andbearings 276 will be driven eccentrically relative to the axis of shaft 281 and thus padplate 234 andpad 233 will be driven in an orbital motion. The foregoing connection is conventional in the art. - It can be seen from FIG. 23 that
columns 243 are distorted and not perfectly symmetrical as shown in FIG. 28. This is due to the fact that when thepin 279 and bolt 273 secure thepad plate 234 tospindle 275,columns 243 will always be distorted. The reason they are perfectly symmetrical in FIG. 28 is because they are not shown in the position they assume when thepad plate 234 is connected to the spindle bybolt 273 andpin 279. - In FIG. 23 a duct arrangement is shown in
shaft 282 for conducting compressed air tochamber 278 ofeccentric housing 229. This duct arrangement may be identical to that described above relative to FIGS. 17-19 and may function in the same manner. Also, the arrangement for conducting compressed air tochamber 278 ofeccentric housing 229 may also be the same as described above relative to FIGS. 20 and 21 and also as described above without being illustrated. - Conventional clips290, which are well known in the art, are mounted at opposite ends of
pad plate 272 for securing opposite ends of the sanding paper which extends across thepad 233. - While preferred embodiments of the present invention have been disclosed, it will be appreciated that it is not limited thereto but may be otherwise embodied within the scope of the following claims.
Claims (37)
1. An orbital sander comprising a housing, a compressed air motor in said housing, a pad support secured to said motor, and first and second elongated rows of spaced plastic columns located on opposite sides of said motor and located between said housing and said pad support.
2. An orbital sander as set forth in claim 1 wherein said first and second rows of spaced plastic columns have lower ends proximate said pad support and have higher ends proximate said housing, and wherein a first bar member is located at each of said lower ends of said first and second rows of plastic columns, and wherein a second bar member is located at each of said upper ends of said first and second rows of plastic columns.
3. An orbital sander as set forth in claim 2 including first fasteners securing said pad support to said first bar members, and second fasteners fastening said housing to said second bar members.
4. An orbital sander as set forth in claim 2 wherein said first and second bar members are molded integrally with each said first and second rows of spaced plastic columns.
5. An orbital sander as set forth in claim 2 wherein said columns have at least one reduced cross sectional area between their ends.
6. An orbital sander as set forth in claim 5 wherein said columns are of substantially circular cross section.
7. An orbital sander as set forth in claim 1 including a shaft in said motor, a rotor mounted on said shaft, a compressed air duct in said motor for conducting compressed air to said rotor, an eccentric housing mounted on said shaft, a chamber in said eccentric housing, at least one bearing in said eccentric housing, and said pad support being secured to said eccentric housing, said first and second rows of spaced plastic columns having lower ends proximate said pad support and have higher ends proximate said housing, and wherein first bar members are located at said lower ends of each of said first and second rows of plastic columns, and wherein second bar members are located at said upper ends of each of said first and second rows of plastic columns.
8. An orbital sander as set forth in claim 7 including first fasteners securing said pad support to said first bar members, and second fasteners fastening said housing to said second bar members.
9. An orbital sander as set forth in claim 7 wherein said first and second bar members are molded integrally with each said first and second rows of spaced columns.
10. An orbital sander as set forth in claim 9 wherein said columns have at least one reduced cross sectional area between their ends.
11. An orbital sander as set forth in claim 7 including means in said motor for conducting compressed air to said chamber.
12. An orbital sander as set forth in claim 7 including another duct in said shaft in communication with said compressed air duct and said chamber for conducting compressed air to said chamber.
13. An orbital sander as set forth in claim 12 including a one-way valve in said another duct for permitting flow only to said chamber.
14. An orbital sander as set forth in claim 13 including a filter in said another duct.
15. An orbital sander as set forth in claim 12 wherein said another duct is a bore in said shaft, and including a keyway in said rotor, a key slot in said shaft, a key in said key slot and extending into said keyway, a clearance between said key and said key slot, a crossbore in said shaft in communication with said key slot, and said crossbore being in communication with said bore in said shaft.
16. An orbital sander as set forth in claim 15 including a pad connected to said eccentric housing, a face on said pad support on the opposite side thereof from said eccentric housing, and wherein said orbital sander has a vertical centerline, and wherein said orbital sander has a height dimension from the top of its housing to said face of said pad which is not greater than about 98 millimeters.
17. An orbital sander as set forth in claim 15 including a counterbore in said bore in communication with said chamber, and a one-way valve in said counterbore.
18. An orbital sander as set forth in claim 17 including a filter in said counterbore.
19. An orbital sander as set forth in claim 18 wherein said one-way valve is positioned between said filter and said chamber.
20. An orbital sander as set forth in claim 7 including an upper plate in said housing, an upper bearing in said upper plate supporting said shaft, a first clearance between said upper plate and said shaft, a second clearance between said shaft and said housing, and said another duct in said shaft being in communication with said first clearance through said upper bearing and said second clearance.
21. An orbital sander as set forth in claim 20 including a pad connected to said eccentric housing, a face on said pad support on the opposite side thereof from said eccentric housing, and wherein said orbital sander has a vertical centerline, and wherein said orbital sander has a height dimension from the top of its housing to said face of said pad which is not greater than about 98 millimeters.
22. An orbital sander as set forth in claim 20 wherein said another duct is a bore in said shaft, and including a counterbore in said bore in communication with said chamber, and a one-way valve in said counterbore.
23. An orbital sander as set forth in claim 22 including a filter in said counterbore.
24. An orbital sander as set forth in claim 23 wherein said one-way valve is positioned between said filter and said chamber.
25. An orbital sander as set forth in claim 7 including a pad connected to said eccentric housing, a face on said pad support on the opposite side thereof from said eccentric housing, and wherein said orbital sander has a vertical centerline, and wherein said orbital sander has a height dimension from the top of its housing to said face of said pad which is not greater than about 98 millimeters.
26. An orbital sander as set forth in claim 7 wherein said another duct is a slot in the outside of said shaft.
27. An orbital sander as set forth in claim 26 including a second bearing mounting said shaft, and wherein said slot is located adjacent said second bearing.
28. An orbital sander as set forth in claim 7 wherein said another duct is an inclined bore in said shaft.
29. An orbital sander as set forth in claim 7 including means in said motor for conducting compressed air to said chamber, and wherein said first and second bar members are molded integrally with each said first and second rows of spaced columns, and wherein said columns have at least one reduced cross sectional area between their ends.
30. An orbital sander as set forth in claim 29 wherein said columns are of substantially circular cross section.
31. A plastic columnar unit for an orbital sander comprising an upper bar member, a lower bar member, and a row of a plurality of spaced columns between said upper and lower bar members.
32. A plastic columnar unit as set forth in claim 31 wherein said spaced columns are molded integrally with said upper and lower bar members.
33. A plastic columnar unit as set forth in claim 32 including metal plates in said upper and lower bar members.
34. A plastic columnar unit as set forth in claim 33 including fasteners molded in said upper and lower bar members.
35. A plastic columnar unit as set forth in claim 31 wherein said columns have at least one reduced cross sectional area between their ends.
36. A plastic columnar unit as set forth in claim 35 wherein said spaced columns are molded integrally with said upper and lower bar members.
37. A plastic columnar unit as set forth in claim 36 including metal plates in said upper and lower bar members.
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US10/373,116 US20030143935A1 (en) | 1997-01-23 | 2003-02-24 | Ergonomically friendly orbital sander construction |
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US08/787,873 US6004197A (en) | 1997-01-23 | 1997-01-23 | Ergonomically friendly random orbital sander construction |
US09/408,192 US6257970B1 (en) | 1997-01-23 | 1999-09-29 | Ergonomically friendly random orbital construction |
US58771100A | 2000-06-05 | 2000-06-05 | |
US10/373,116 US20030143935A1 (en) | 1997-01-23 | 2003-02-24 | Ergonomically friendly orbital sander construction |
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US10/373,116 Abandoned US20030143935A1 (en) | 1997-01-23 | 2003-02-24 | Ergonomically friendly orbital sander construction |
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US10/373,169 Expired - Lifetime US6855040B2 (en) | 1997-01-23 | 2003-02-24 | Ergonomically friendly orbital sander construction |
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Citations (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2114966A (en) * | 1936-05-19 | 1938-04-19 | American Floor Surfacing Mach | Surfacing machine |
US3673744A (en) * | 1971-02-12 | 1972-07-04 | Anders Oimoen | Portable grinder |
US3785092A (en) * | 1971-12-28 | 1974-01-15 | A Hutchins | Abrading tool having suction system for collecting abraded particles |
US3793781A (en) * | 1972-03-10 | 1974-02-26 | A Hutchins | Reciprocating abrading or polishing tool |
US3970110A (en) * | 1975-02-06 | 1976-07-20 | Chicago Pneumatic Tool Company | Safety inlet air valve control arrangement for air powered hand held tool |
US4071981A (en) * | 1976-12-03 | 1978-02-07 | Champayne Roy J | Portable abrading machine with dust collecting system |
US4268233A (en) * | 1978-05-16 | 1981-05-19 | Atlas Copco Aktiebolag | Hand held rotary machine tool with vibration insulating means |
USD269845S (en) * | 1980-10-22 | 1983-07-26 | Hutchins Manufacturing Co. | Abrading tool |
US4414781A (en) * | 1981-09-01 | 1983-11-15 | Black & Decker Inc. | Turbine sander |
US4467565A (en) * | 1982-08-02 | 1984-08-28 | Chicago Pneumatic Tool Company | Rotary and orbital sander |
US4531329A (en) * | 1983-10-03 | 1985-07-30 | Dynabrade, Inc. | Lip seal shroud |
US4592170A (en) * | 1984-08-17 | 1986-06-03 | Hutchins Manufacturing Company | Orbital abrading or polishing tool |
US4624078A (en) * | 1983-10-17 | 1986-11-25 | Skil Corporation | Surface sander |
US4660329A (en) * | 1980-10-20 | 1987-04-28 | Hutchins Manufacturing Company | Powered abrading tool |
US4671019A (en) * | 1986-02-18 | 1987-06-09 | Hutchins Manufacturing Company | Portable power operated sander |
US4854085A (en) * | 1987-09-24 | 1989-08-08 | Dynabrade, Inc. | Random orbital sander |
US4879847A (en) * | 1989-03-13 | 1989-11-14 | Snap-On Tools Corporation | Cover for pneumatic tool |
USD314125S (en) * | 1988-08-09 | 1991-01-29 | Hitachi Koki Company, Ltd. | Orbital sander |
US5040340A (en) * | 1990-08-29 | 1991-08-20 | Marshco Products, Inc. | Random orbital sander adapter |
US5105585A (en) * | 1991-04-26 | 1992-04-21 | The United States Of America As Represented By The Department Of Health And Human Services | Dust emissions control mechanism for hand sanders |
USD326398S (en) * | 1989-05-23 | 1992-05-26 | Makita Electric Works, Ltd. | Orbital sander |
US5125190A (en) * | 1990-05-16 | 1992-06-30 | Buser John P | Dust collector and shield for rotary grinder |
USD332734S (en) * | 1989-10-24 | 1993-01-26 | Makita Electric Works, Ltd. | Polisher |
USD334126S (en) * | 1991-02-01 | 1993-03-23 | Dynabrade, Inc. | Orbital sander |
US5228244A (en) * | 1992-07-15 | 1993-07-20 | George Chu | Pneumatic tool having synergetic dust-removal drafting effect |
USD347561S (en) * | 1992-10-06 | 1994-06-07 | Dynabrade, Inc. | Random orbital sander |
US5319888A (en) * | 1992-11-13 | 1994-06-14 | Dynabrade, Inc. | Random orbital sander |
USD350886S (en) * | 1993-11-15 | 1994-09-27 | Dynabrade, Inc. | Random orbital sander |
US5531639A (en) * | 1992-01-24 | 1996-07-02 | Catalfamo; Giuseppe | Smoothing mill with suction, by depression in three stages, of dust so generated |
US5536199A (en) * | 1993-05-31 | 1996-07-16 | Urakami Research & Development Co., Ltd. | Traveling device |
US5558569A (en) * | 1995-04-12 | 1996-09-24 | Lee; Tai-Wang | Grinding head mounting structure for portable grinding machines |
US5595530A (en) * | 1995-01-31 | 1997-01-21 | Dynabrade, Inc. | Reciprocating sander |
US5597348A (en) * | 1994-11-29 | 1997-01-28 | Hutchins Manufacturing Company | Water feed for sanding tool |
US5709595A (en) * | 1993-02-04 | 1998-01-20 | Robert Bosch Gmbh | Power tool for surface treatment |
US5713785A (en) * | 1997-01-17 | 1998-02-03 | Linax Co., Ltd. | Vacuum type portable sander |
US5791979A (en) * | 1997-03-17 | 1998-08-11 | Duncan; C. Warren | Grinding vacuum shroud |
US5885146A (en) * | 1995-12-06 | 1999-03-23 | Black & Decker Inc. | Oscillating hand tool |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5518442A (en) * | 1993-01-22 | 1996-05-21 | Porter-Cable Corporation | Sander |
USD350266S (en) | 1993-11-15 | 1994-09-06 | Dynabrade, Inc. | Random orbital sander |
JPH0811045A (en) | 1994-06-30 | 1996-01-16 | Shinano Seisakusho:Kk | Polishing tool of pneumatic driving source |
US6485360B1 (en) * | 1999-07-20 | 2002-11-26 | Hutchins Mfg, Co. | Orbital sanding tool |
JP3634995B2 (en) * | 1999-12-07 | 2005-03-30 | 株式会社マキタ | Sanda |
-
2003
- 2003-02-24 US US10/373,169 patent/US6855040B2/en not_active Expired - Lifetime
- 2003-02-24 US US10/373,116 patent/US20030143935A1/en not_active Abandoned
Patent Citations (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2114966A (en) * | 1936-05-19 | 1938-04-19 | American Floor Surfacing Mach | Surfacing machine |
US3673744A (en) * | 1971-02-12 | 1972-07-04 | Anders Oimoen | Portable grinder |
US3785092A (en) * | 1971-12-28 | 1974-01-15 | A Hutchins | Abrading tool having suction system for collecting abraded particles |
US3793781A (en) * | 1972-03-10 | 1974-02-26 | A Hutchins | Reciprocating abrading or polishing tool |
US3970110A (en) * | 1975-02-06 | 1976-07-20 | Chicago Pneumatic Tool Company | Safety inlet air valve control arrangement for air powered hand held tool |
US4071981A (en) * | 1976-12-03 | 1978-02-07 | Champayne Roy J | Portable abrading machine with dust collecting system |
US4268233A (en) * | 1978-05-16 | 1981-05-19 | Atlas Copco Aktiebolag | Hand held rotary machine tool with vibration insulating means |
US4660329A (en) * | 1980-10-20 | 1987-04-28 | Hutchins Manufacturing Company | Powered abrading tool |
USD269845S (en) * | 1980-10-22 | 1983-07-26 | Hutchins Manufacturing Co. | Abrading tool |
US4414781A (en) * | 1981-09-01 | 1983-11-15 | Black & Decker Inc. | Turbine sander |
US4467565A (en) * | 1982-08-02 | 1984-08-28 | Chicago Pneumatic Tool Company | Rotary and orbital sander |
US4531329A (en) * | 1983-10-03 | 1985-07-30 | Dynabrade, Inc. | Lip seal shroud |
US4624078A (en) * | 1983-10-17 | 1986-11-25 | Skil Corporation | Surface sander |
US4592170A (en) * | 1984-08-17 | 1986-06-03 | Hutchins Manufacturing Company | Orbital abrading or polishing tool |
US4671019A (en) * | 1986-02-18 | 1987-06-09 | Hutchins Manufacturing Company | Portable power operated sander |
US4854085A (en) * | 1987-09-24 | 1989-08-08 | Dynabrade, Inc. | Random orbital sander |
USD314125S (en) * | 1988-08-09 | 1991-01-29 | Hitachi Koki Company, Ltd. | Orbital sander |
US4879847A (en) * | 1989-03-13 | 1989-11-14 | Snap-On Tools Corporation | Cover for pneumatic tool |
USD326398S (en) * | 1989-05-23 | 1992-05-26 | Makita Electric Works, Ltd. | Orbital sander |
USD332734S (en) * | 1989-10-24 | 1993-01-26 | Makita Electric Works, Ltd. | Polisher |
US5125190A (en) * | 1990-05-16 | 1992-06-30 | Buser John P | Dust collector and shield for rotary grinder |
US5040340A (en) * | 1990-08-29 | 1991-08-20 | Marshco Products, Inc. | Random orbital sander adapter |
USD334126S (en) * | 1991-02-01 | 1993-03-23 | Dynabrade, Inc. | Orbital sander |
US5105585A (en) * | 1991-04-26 | 1992-04-21 | The United States Of America As Represented By The Department Of Health And Human Services | Dust emissions control mechanism for hand sanders |
US5531639A (en) * | 1992-01-24 | 1996-07-02 | Catalfamo; Giuseppe | Smoothing mill with suction, by depression in three stages, of dust so generated |
US5228244A (en) * | 1992-07-15 | 1993-07-20 | George Chu | Pneumatic tool having synergetic dust-removal drafting effect |
USD347561S (en) * | 1992-10-06 | 1994-06-07 | Dynabrade, Inc. | Random orbital sander |
US5538040A (en) * | 1992-11-13 | 1996-07-23 | Dynabrade, Inc. | Pneumatic control valve |
US5319888A (en) * | 1992-11-13 | 1994-06-14 | Dynabrade, Inc. | Random orbital sander |
US5411386A (en) * | 1992-11-13 | 1995-05-02 | Dynabrade, Inc. | Random orbital sander |
US5709595A (en) * | 1993-02-04 | 1998-01-20 | Robert Bosch Gmbh | Power tool for surface treatment |
US5536199A (en) * | 1993-05-31 | 1996-07-16 | Urakami Research & Development Co., Ltd. | Traveling device |
USD350886S (en) * | 1993-11-15 | 1994-09-27 | Dynabrade, Inc. | Random orbital sander |
US5597348A (en) * | 1994-11-29 | 1997-01-28 | Hutchins Manufacturing Company | Water feed for sanding tool |
US5595530A (en) * | 1995-01-31 | 1997-01-21 | Dynabrade, Inc. | Reciprocating sander |
US5558569A (en) * | 1995-04-12 | 1996-09-24 | Lee; Tai-Wang | Grinding head mounting structure for portable grinding machines |
US5885146A (en) * | 1995-12-06 | 1999-03-23 | Black & Decker Inc. | Oscillating hand tool |
US5713785A (en) * | 1997-01-17 | 1998-02-03 | Linax Co., Ltd. | Vacuum type portable sander |
US5791979A (en) * | 1997-03-17 | 1998-08-11 | Duncan; C. Warren | Grinding vacuum shroud |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7118609B2 (en) * | 2003-05-14 | 2006-10-10 | Guido Valentini | Motorized tool with suction and dust collection capacity |
US20040226272A1 (en) * | 2003-05-14 | 2004-11-18 | Guido Valentini | Motorized tool with suction and dust collection capacity |
US7226348B1 (en) * | 2005-10-07 | 2007-06-05 | Tse-Hua Chang | Air sander grinder |
US7222679B1 (en) | 2006-03-17 | 2007-05-29 | Snap-On Incorporated | Random orbital sander |
US8057285B2 (en) * | 2006-08-21 | 2011-11-15 | Dynabrade, Inc. | Comfort grip for an orbital abrasive hand tool |
US20080045127A1 (en) * | 2006-08-21 | 2008-02-21 | Mark Lampka | Comfort grip for an orbital abrasive hand tool |
US20090209182A1 (en) * | 2006-09-05 | 2009-08-20 | Dynabrade, Inc. | Locking random orbital dual-action head assembly |
US20100151775A1 (en) * | 2006-09-05 | 2010-06-17 | Dynabrade, Inc. | Locking random orbital dual-action head assembly with centering |
US7713110B2 (en) | 2006-09-05 | 2010-05-11 | Dynabrade, Inc. | Locking random orbital dual-action head assembly |
US8007347B1 (en) * | 2006-10-27 | 2011-08-30 | Dynabrade, Inc. | Rotary abrading tool |
US20100099341A1 (en) * | 2008-10-20 | 2010-04-22 | X'pole Precision Tools, Inc. | Ergonomic throttle lever control and hand support |
US8276684B2 (en) * | 2010-10-01 | 2012-10-02 | X'pole Precision Tools Inc. | Machine tool with auxiliary cushion structure |
US8758095B2 (en) * | 2011-05-12 | 2014-06-24 | Hutchins Manufacturing Company | Abrading or polishing tool with improved motor chamber |
US20120289136A1 (en) * | 2011-05-12 | 2012-11-15 | Hutchins Manufacturing Company | Abrading or polishing tool with improved motor chamber |
US8926409B2 (en) * | 2011-05-25 | 2015-01-06 | Oy Kwh Mirka Ab | Handheld machine |
US20120302143A1 (en) * | 2011-05-25 | 2012-11-29 | Oy Kwh Mirka Ab | Handheld machine |
US20150014013A1 (en) * | 2011-12-23 | 2015-01-15 | Robert Bosch Gmbh | Electrically Operable Machine Tool |
US20150209949A1 (en) * | 2014-01-29 | 2015-07-30 | Black & Decker Inc. | Paddle assembly on a compact sander |
US9868199B2 (en) * | 2014-01-29 | 2018-01-16 | Black & Decker Inc. | Paddle assembly on a compact sander |
US20180093372A1 (en) * | 2014-01-29 | 2018-04-05 | Black & Decker Inc. | Paddle assembly on a compact sander |
US20170190013A1 (en) * | 2016-01-05 | 2017-07-06 | Super Master Developing Co., Ltd. | Pneumatic tool |
US20170246721A1 (en) * | 2016-02-26 | 2017-08-31 | Super Master Developing Co., Ltd. | Pneumatic tool |
US11179839B2 (en) * | 2019-01-23 | 2021-11-23 | Fairway Electronic Co., Ltd. | Handheld machine tool |
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