US20090209182A1 - Locking random orbital dual-action head assembly - Google Patents
Locking random orbital dual-action head assembly Download PDFInfo
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- US20090209182A1 US20090209182A1 US12/429,520 US42952009A US2009209182A1 US 20090209182 A1 US20090209182 A1 US 20090209182A1 US 42952009 A US42952009 A US 42952009A US 2009209182 A1 US2009209182 A1 US 2009209182A1
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- Prior art keywords
- head assembly
- axis
- rotation
- recited
- rotatable
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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
- B24B23/022—Spindle-locking devices, e.g. for mounting or removing the tool
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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
- B24B23/028—Angle tools
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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
Definitions
- the present invention relates generally to a lockable random orbital dual-action head assembly. More particularly, the present invention relates to a locking assembly arranged to lock a rotatable element to prevent rotation of the rotatable element relative to the head assembly about an axis of rotation.
- the head assembly includes a first element displaceable to rotationally lock the rotatable element, and a second element engageable with the first element and displaceable to control the displacement of the first element and the locking assembly includes an elastically deformable element arranged to urge the first element in a first direction.
- the second element is engageable with the first element to urge the first element in a second direction, opposite the first direction, to lock the rotatable element with the body.
- Pin 26 includes rib 27 , upon which retention spring 25 rests.
- Sliding bolt hole 24 is operatively arranged to accept sliding bolt 22 .
- sliding bolt 22 protrudes through both sides of sliding bolt hole 24 so that an operator can access both ends of slide sliding bolt 22 to move the bolt from an engaged to a disengaged position.
- sliding bolt 22 protrudes through one side substantially more so that the other side dependent upon whether sliding bolt 22 is in the engaged or disengaged position.
- Sliding bolt 22 protrudes through to a first side substantially more than a second side in the engaged position, and protrudes through the second side substantially more than the first side in the disengaged position.
- the engaged and disengaged positions are further described below. The preceding configuration enables easy engagement or disengagement of the sliding bolt 22 when the operator is wearing work gloves.
- Casing 30 acts as a shell and structural support for ball bearing assembly 34 , spindle 36 , and counterbalance 40 .
- Ball bearing assembly 34 provides for rotation, about axis 54 , of spindle 36 , base support 44 , pad base 45 and pad 48 independent of casing 30 .
- any ball bearing means known in the art can be used for ball bearing assembly 34 .
- any rotation support means known in the art can be used for rotation about axis 54 , for example a bushing arrangement (not shown).
- elastically deformable element, or spring, 25 applies constant force to pin 26 to urge the pin in direction 23 . This force tends to keep pin 26 engaged with which ever of slots 62 or 64 in which the pin is disposed.
- pin 22 is positioned so that pin 26 is disposed in slot 62 .
- Length 31 of pin 26 is less than or equal to axial length 33 between pin 22 and element 36 , so that in the unlocked mode, pin 26 does not extend far enough in direction 29 to engage element 36 and element 36 is able to rotate without substantive interference from pin 26 .
- FIG. 12 is a cross section view of the alternate embodiment seen in FIG. 10 in which rotating element 136 is locked in position so that spindle 136 is linked with body 130 and rotates with body 130 .
- pin 122 is moved horizontally to contact pin 126 and bias spring 125 toward spindle 136 .
- the user then rotates body 130 until pin 126 contacts slot 164 on bolt 122 and is forced into receiving hole 137 on spindle 136 , thereby releasably locking body 130 to spindle 136 .
- spindle 136 is shaped so that when head 130 is turned to the locked mode, it rotates along with body 130 around first axis 154 .
- FIGS. 10-12 may also include the replaceable counterweights 140 and/or 141 so that a particular dual action head 120 may include both replaceable counterweights and spindle 136 that enables a locked spindle 136 to rotate around the same axis 152 as body 130 .
- This provides the advantage of centering pad assemblies 145 having different sizes with the axis of rotation provided by the drive means of a rotating tool attached to head 120 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
A head assembly for a rotary tool, comprising a body arranged for connection to a drive means, the drive means rotatable about a first axis of rotation; a rotatable element arranged for connection to a pad assembly, the rotatable element rotatable about a second axis of rotation disposed substantially parallel to the first axis of rotation; and, a locking assembly arranged to lock the rotatable element to the body to prevent rotation of the rotatable element relative to the body about the second axis of rotation.
Description
- The present application is a continuation-in-part application of U.S. patent application Ser. No. 11/516,003 filed Sep. 5, 2006 which application is incorporated by reference in its entirety.
- The present invention relates generally to a lockable random orbital dual-action head assembly. More particularly, the present invention relates to a locking assembly arranged to lock a rotatable element to prevent rotation of the rotatable element relative to the head assembly about an axis of rotation.
- Orbital abrading tools are well-known and generally comprise a portable, manually manipulatable housing, a motor supported by the housing and having or being coupled to a drive shaft driven for rotation about a first axis, and an assembly for mounting a pad for abrading or polishing a work surface for orbital movement about the first axis. In a random orbital abrading tool, the assembly serves to additionally mount the pad for free rotational movement about a second axis, which is disposed parallel to the first axis.
- The assembly typically includes a head portion coupled for driven rotation with the drive shaft about the first axis and defining a mounting recess having an axis arranged coincident with the second axis, a bearing supported within the mounting recess, and means for connecting the pad to the bearing for rotation about the second axis.
- Locking mechanisms for orbital abrading tools are known in the art and described in U.S. Pat. No. 6,749,493 (Wuensch); U.S. Pat. No. 6,974,370 (Hutchins); U.S. Pat. No. 6,485,360 (Hutchins); and, U.S. Pat. No. 5,823,862 (Heidelberger. The locking mechanisms are also known as spindle-locks in the art.
- U.S. Pat. No. 6,749,493 (Wuensch) discloses a spindle-lock using a circumferential slider to engage at least one pin to lock the mechanism. By moving the slider circumferentially, a spring retained pin will be forced to vertically engage a hole in a gear wheel, locking the spindle. Wuensch shows a one-piece design for both the motor assembly and the head assembly. Thus, a new tool would be necessary for use with a different head assembly (such as a non-orbital head or a grinder wheel). Furthermore, the circumferential slider comprises many components, increasing the cost of manufacturing and overall weight of the tool.
- The same deficiency is present in both U.S. Pat. No. 6,485,360 (Hutchins), and U.S. Pat. No. 5,823,862 (Heidelberger). Although they have different forms of locking mechanisms, the locking mechanism, head assembly, and rotatable means about a second axis are permanently affixed to the abrading tool housing. This broad incorporation restricts the capabilities of the tool. Thus, a new tool would be necessary for use with a different head assembly (such as a non-orbital head or a grinder wheel).
- U.S. Pat. No. 6,974,370 (Hutchins '370) presents a similar deficiency. Hutchins '370 shows a spindle lock for an orbital abrading or polishing tool. The head assembly is removable from the abrading tool, but the locking mechanism and means for orbital motion are structural components of the abrading tool housing. Thus, a new tool would still be necessary for a non-orbital head or a grinder wheel.
- Furthermore, the locking mechanisms, or spindle-locks, described in the references above can be awkward to manipulate by a user wearing work gloves. Also, the locking mechanisms can be engaged accidentally by the user while the tool is in operation, resulting in excessive wear of the locking mechanism components and reducing the lifetime of the rotary tool and its components.
- What is needed then is a locking random orbital dual-action head assembly wherein the rotatable means about an orbital axis and locking mechanism are structural components of the head assembly so that the head assembly can be used with a standard rotary tool. Thus, a single rotary tool can be used and different head assemblies can be attached for various uses. Also, costs can be reduced as individual head assemblies or rotary tools can be repaired or replaced independent of an entire head-assembly/rotary tool combination as in the prior art.
- What is also needed is a head assembly comprising a locking mechanism that can not easily be accidentally locked while the tool is in operation, reducing unnecessary wear on the head assembly's or rotary tool's components.
- The invention broadly comprises a removable head assembly for a rotary tool, including a body arranged for connection to a drive means, the drive means rotatable about a first axis of rotation; a rotatable element arranged for connection to a pad assembly, the rotatable element rotatable about a second axis of rotation disposed substantially parallel to the first axis of rotation; and, a locking assembly arranged to lock the rotatable element to the body to prevent rotation of the rotatable element relative to the body about the second axis of rotation.
- In some aspects, the head assembly includes a first element displaceable to rotationally lock the rotatable element, and a second element engageable with the first element and displaceable to control the displacement of the first element and the locking assembly includes an elastically deformable element arranged to urge the first element in a first direction. The second element is engageable with the first element to urge the first element in a second direction, opposite the first direction, to lock the rotatable element with the body.
- In some aspects, the rotatable element includes at least one receiving feature engageable with the first element, the pad assembly includes a pad base and an abrasive pad, or the pad base and the abrasive pad are secured to one another by means of a hook and loop fastening system. In some aspects, the removable head assembly includes a rotary tool. In some aspects, the rotary tool has an air powered motor. In some aspects, the removable head assembly includes a coupling for detachably securing the head assembly to a rotary tool and the coupling is a threaded connection or a socket connection. In some aspects, the removable head assembly includes a counterbalance secured to the body.
- The invention also broadly comprises head assembly for a rotary tool including: a body connected to a drive means for the rotary tool, the drive means rotatable about a first axis of rotation; a rotation means disposed in the body for rotation about a second axis parallel to the first axis, the rotation means comprising a latitudinal portion extending substantially perpendicular to the second axis and comprising at least one receiving aperture; and, a locking mechanism comprising substantially longitudinal first and second components slidingly engaged with the body and slidingly engaged one with the other, wherein the first component is arranged to slide parallel to the latitudinal portion to displace the second component in a first direction substantially parallel to the second axis to engage the second latitudinal component with the at least one receiving aperture to rotationally lock the rotation means with respect to the body.
- The invention further broadly comprises a combination rotary tool and removable head assembly, comprising: a rotary tool having a handle, drive means, and means for receiving a removable head assembly; and a removable head assembly operatively arranged to be detachably secured to the rotary tool. The assembly includes: a body arranged for connection to the drive means, the drive means rotatable about a first axis of rotation; a rotatable element arranged for connection to a pad assembly, the rotatable element rotatable about a second axis of rotation disposed substantially parallel to the first axis of rotation; and a locking assembly arranged to lock the rotatable element to the body to prevent rotation of the rotatable element relative to the body about the second axis of rotation.
- The invention broadly comprises a combination rotary tool and head assembly, including: a rotary tool having a handle, drive means, and means for securing a head assembly; and, a head assembly secured to the rotary tool. The assembly includes: a body connected to a drive means for the rotary tool, the drive means rotatable about a first axis of rotation; a rotation means disposed in the body for rotation about a second axis parallel to the first axis, the rotation means comprising a latitudinal portion extending substantially perpendicular to the second axis and comprising at least one receiving aperture; and a locking mechanism including substantially longitudinal first and second components slidingly engaged with the body and slidingly engaged one with the other, wherein the first component is arranged to slide parallel to the latitudinal portion to displace the second component in a first direction substantially parallel to the second axis to engage the second latitudinal component with the at least one receiving aperture to rotationally lock the rotation means with respect to the body.
- The invention still further broadly comprises a removable head assembly for a rotary tool comprising a body arranged for connection to a drive means, the drive means rotatable about a first axis of rotation, a rotatable element arranged for connection to a pad assembly, the rotatable element rotatable about a second axis of rotation disposed substantially parallel to the first axis of rotation, and a locking assembly arranged to releasably lock the rotatable element to the body in axial alignment with the first axis of rotation.
- Additionally, the invention broadly comprises a removable head assembly for a rotary tool that includes a body arranged for connection to a drive means, the drive means rotatable about a first axis of rotation, a rotatable element arranged for connection to a pad assembly, the rotatable element rotatable about a second axis of rotation disposed substantially parallel to the first axis of rotation, a locking assembly arranged to lock the rotatable element to the body to prevent rotation of the rotatable element relative to the body about the second axis of rotation, and at least one counterweight releasably attached to the body.
- A general objective of the present invention is to provide a removable head assembly with a means for restricting orbital rotation.
- A further object of the present invention is to minimize the size, weight, and cost of a locking random orbital dual-action head assembly.
- These and other objects, features and advantages of the present invention will become readily apparent to those having ordinary skill in the art upon a reading of the following detailed description of the invention in view of the drawings and claims.
- The nature and mode of operation of the present invention will now be more fully described in the following detailed description of the invention taken with the accompanying drawing figures, in which:
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FIG. 1 is a perspective view of a present invention removable locking random orbital dual action head assembly connected to a rotary tool; -
FIG. 2 is an exploded view of the removable locking random orbital dual action head assembly and rotary tool shown inFIG. 1 ; -
FIG. 3 is a front view of the removable locking random orbital dual action head assembly shown inFIG. 1 ; -
FIG. 4 is a cross sectional view of the removable locking random orbital dual action head assembly shown inFIG. 3 taken along Line 4-4 inFIG. 3 ; -
FIG. 5 is a top view of the removable locking random orbital dual action head assembly shown inFIG. 1 ; -
FIG. 6 is a cross sectional view of the removable locking random orbital dual action head assembly shown inFIG. 5 taken along Line 6-6 inFIG. 5 ; -
FIG. 7 is a top view of the sliding bolt shown inFIG. 1 ; -
FIG. 8 is a side view of the sliding bolt shown inFIG. 7 taken along Line 8-8 inFIG. 7 ; -
FIG. 9 is an illustrative view of a present invention locking mechanism illustrating the sliding bolt ofFIG. 8 engaging a pin into an engagement hole. -
FIG. 10 is an exploded view of an alternate embodiment of the removable locking random orbital dual action head assembly and rotary tool shown inFIG. 1 ; -
FIG. 11 is a cross section view of the alternate embodiment seen inFIG. 10 in which the rotating element is unlocked; and, -
FIG. 12 is a cross section of the alternate embodiment in which the rotating element is locked and in alignment with the first axis of rotation. - At the outset, it should be appreciated that like drawing numbers on different drawing views identify identical, or functionally similar, structural elements of the invention. While the present invention is described with respect to what is presently considered to be the preferred aspects, it is to be understood that the invention as claimed is not limited to the disclosed aspects.
- Furthermore, it is understood that this invention is not limited to the particular methodology, materials and modifications described and as such may, of course, vary. It is also understood that the terminology used herein is for the purpose of describing particular aspects only, and is not intended to limit the scope of the present invention, which is limited only by the appended claims.
- Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood to one of ordinary skill in the art to which this invention belongs. Although any methods, devices or materials similar or equivalent to those described herein can be used in the practice or testing of the invention, the preferred methods, devices, and materials are now described.
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FIG. 1 is a perspective view ofrotary tool 10 connected to removable locking random orbital dual action head assembly 20 (hereinafter “head assembly 20”).Rotary tool 10 in a preferred embodiment is a compressed air powered tool, but it should be appreciated that any type of rotary tool could be used. For example, an electrically powered rotary tool could be used. In a preferred embodiment,rotary tool 10 comprisesfirst handle 12,second handle 14, and trigger 16, which triggers air flow to provide power torotary tool 10. -
FIG. 2 is an exploded view of removable locking random orbital dualaction head assembly 20 androtary tool 10 shown inFIG. 1 . -
FIG. 3 is a front view of removable locking random orbital dualaction head assembly 20 shown inFIG. 1 . -
FIG. 4 is a cross sectional view of removable locking random orbital dualaction head assembly 20 shown inFIG. 3 taken along Line 4-4 inFIG. 3 . The following should be viewed in light ofFIGS. 1 through 4 .Rotary tool 10 includes threadedscrew 18 for attachment to head assembly 20 at threadedport 28. This connection at threadedscrew 18 and threadedport 28 provides first axis ofrotation 52 for orbital motion. First axis ofrotation 52 is most clearly shown inFIG. 4 . Referring back toFIG. 2 , it should be appreciated that any means betweenrotary tool 10 andhead assembly 20 could be used. A threaded connection is preferred, but a socket connection (such as a connection used for socket wrenches as known in the art) or any other form of coupling known in the art used in rotation applications could be used. - The following is a broad overview of
assembly 20, further details are provided below.Assembly 20 includes body, or casing 30, rotatable element, or spindle, 36, and lockingassembly 21.Casing 30 is arranged for connection to a drive means, for example, screw 18, rotatable about an axis ofrotation 52.Element 36 is arranged for connection to a pad assembly, forexample pad assembly 45, and is rotatable about axis ofrotation 54, disposed substantially parallel to axis ofrotation 52. Lockingassembly 21 is arranged to lockrotatable element 36 tobody 30 to prevent rotation ofelement 36, relative tobody 30, about axis ofrotation 54. - Locking
assembly 21 includes element, or pin, 26 displaceable to rotationally lockrotatable element 36.Assembly 21 also includeselement 22, engageable withelement 26 and displaceable to control the displacement ofelement 26, and elasticallydeformable element 25 arranged to urgeelement 26 indirection 23. In some aspects,element 25 is a spring. However it should be understood that any elastically deformable element known in the art can be used. As further described below,element 22 is engageable withelement 26 to urgeelement 26 indirection 29 to lockelement 36 withbody 30.Rotatable element 36 includes at least one receiving feature engageable withelement 26. The receiving feature can be an opening, for example, opening 37, or an indentation. -
Casing 30 ofassembly 20 includes threadedport 28,pin hole 32, and slidingbolt hole 24.Pin hole 32 is operatively arranged to acceptpin 26 andretention spring 25.Retention spring 25 retainspin 26 in a disengaged position, with respect toelement 36, until slidingbolt 22 is engaged. -
Pin 26 includesrib 27, upon whichretention spring 25 rests. Slidingbolt hole 24 is operatively arranged to accept slidingbolt 22. In some aspects, slidingbolt 22 protrudes through both sides of slidingbolt hole 24 so that an operator can access both ends ofslide sliding bolt 22 to move the bolt from an engaged to a disengaged position. In some aspects, slidingbolt 22 protrudes through one side substantially more so that the other side dependent upon whether slidingbolt 22 is in the engaged or disengaged position. Slidingbolt 22 protrudes through to a first side substantially more than a second side in the engaged position, and protrudes through the second side substantially more than the first side in the disengaged position. The engaged and disengaged positions are further described below. The preceding configuration enables easy engagement or disengagement of the slidingbolt 22 when the operator is wearing work gloves. - Sliding
bolt 22 rotates withhead assembly 20 whenrotary tool 10 is engaged. This rotation inhibits a user from accidentally engaging slidingbolt 22 while the tool is being used and causing unnecessary wear on the components. -
Casing 30 acts as a shell and structural support forball bearing assembly 34,spindle 36, andcounterbalance 40.Ball bearing assembly 34 provides for rotation, aboutaxis 54, ofspindle 36,base support 44,pad base 45 andpad 48 independent ofcasing 30. It should be appreciated that any ball bearing means known in the art can be used forball bearing assembly 34. It also should be appreciated that any rotation support means known in the art can be used for rotation aboutaxis 54, for example a bushing arrangement (not shown). - In some aspects,
spindle 36 includes a plurality of holes or indentations. Some of the holes, for example, holes 37, are engagement holes and some of the holes, for example, holes 39 are bearing retention holes. It should be appreciated that any number of holes could be used. In some aspects, three holes for engagement holes 37 and three holes for retention holes 39 are used for ease of balancing and manufacturing. Balancing is very important in rotary tools in order to minimize undesirable vibration. Engagement holes 37 are about the same size as the diameter ofpin 26 and are operatively arranged to acceptpin 26. Retention holes 39 are of a size larger that the heads of retention screws 38. Retention screws 38 holdball bearing assembly 34 tocasing 30. It should be appreciated that any means of attachment known in the art can be used. In some aspects, retention screws 38 in a set of three are used for balancing and ease of manufacturing.Pin hole 32 and holes 37 are at a same radial distance fromaxis 54 to facilitate the alignment ofpin 26 and the holes as further described below. - In some aspects,
counterbalance 40 is bolted intocasing 30 by means ofbolts 42 to provide a balanced rotation of both orbital and rotational motion and thereby reduce vibrations. -
FIG. 5 is a top view of removable locking random orbital dualaction head assembly 20 shown inFIG. 1 . -
FIG. 6 is a cross sectional view of removable locking random orbital dualaction head assembly 20 shown inFIG. 5 taken along Line 6-6 inFIG. 5 . -
FIG. 7 is a top view of slidingbolt 22 shown inFIG. 1 . -
FIG. 8 is a side view of slidingbolt 22 shown inFIG. 7 taken along Line 8-8 inFIG. 7 . -
FIG. 9 is an illustrative view of present invention locking assembly, or locking mechanism, 21illustrating sliding bolt 22 ofFIG. 8 engagingpin 26 to urgepin 26 into an engagement hole. The following should be viewed in light ofFIGS. 1 through 9 . The operation of lockingassembly 21 is now described in further detail. Slidingbolt 22 has two graduated slots, slot 62 for a disengaged position ofpin 26, and slot 64 for an engaged position ofpin 26.Ridge 66 is disposed betweenslots Ridge 66 inhibitsbolt 26 from moving betweenslots bolt 22 from slidingpin 26 between engagedslot 64 and disengagedslot 62 without direct user manipulation to overcome the spring force created byretention spring 25. InFIGS. 4 and 6 , slidingbolt 22 is in a disengaged position withpin 26 inslot 62.Slots ridge 66 between them, has been previously presented in U.S. Pat. No. 5,823,862 (Heidelberger), which is incorporated by reference herein. - As noted above, elastically deformable element, or spring, 25 applies constant force to pin 26 to urge the pin in
direction 23. This force tends to keeppin 26 engaged with which ever ofslots pin 22 is positioned so thatpin 26 is disposed inslot 62.Length 31 ofpin 26 is less than or equal toaxial length 33 betweenpin 22 andelement 36, so that in the unlocked mode,pin 26 does not extend far enough indirection 29 to engageelement 36 andelement 36 is able to rotate without substantive interference frompin 26. - To switch to the locking mode,
pin 22 is laterally displaced so thatpin 26 shifts to slot 64, displacing pin indirection 29 and intoopening 37, as shown inFIG. 9 . For example,length 31 is sufficient to enablepin 26 to extend throughopening 37 oncepin 26 andopening 37 are aligned. To attain this alignment from the unlocked position, lateral pressure is applied to the appropriate end ofpin 22, for example, indirection 74 inFIG. 9 and assembly 20 (and subsequently element 36) is rotated aboutaxis 54 until anopening 37 aligns withpin 26. At that point, the lateral pressure causespin 22 to slide so thatpin 26 displaces to slot 64 and is pushed intoopening 37, lockingelement 37 with respect to casing 30 through whichpin 26 passes. Thus, by rotatinghead assembly 20 aroundsecond axis 54,pin 26 will eventually align with one of the three engagement holes 37. - The locking mechanism herein described locks the rotation of the pad assembly, which comprises
base support 44,pad base 45, and pad 48 aboutsecond axis 54. Thus, the pad assembly will only rotate aboutfirst axis 52 withcasing 30. - In some aspects, components of
head assembly 20 are machined from metal. In some aspects, other material including, but not limited to composites, plastics, and combinations thereof are used to make the components. In some aspects both metal and one or more of the other materials are used to form the components. It should also appreciated that any form of metal processing could be used, including casting, pressing, welding, machining, and combinations thereof. In some aspects, machining is used to increase precision. -
Base support 44 andpad base 45 are affixed to each other by glue, but it should be appreciated that any means of attachment known in the art can be used.Base support 44 is made of a non-pliable material that provides structural support forpad base 45 and also a means forpad bolt 46 to be tightened tospindle 36.Pad base 45 is made of a pliable material that will provide for a dampened interface between a work surface and the user. Preferably,base support 44 is made from plastic andpad base 45 is a high density foam or similar rubber, but it should be appreciated that any similar materials could be used for eitherbase support 44 orpad base 45.Base support 44 is attached to spindle 36 by means ofpad bolt 46.Pad bolt 46 is recessed withinpad base 45 and is most clearly shown inFIG. 4 . - Referring back to
FIG. 2 ,pad base 45 preferably comprises either a hook or loop surface. Alternatively,pad 48 comprises a loop or hook surface so thatpad base 45 andpad 48 may be attached by a hook and loop interface. This allows for a quick and easy replacement ofpad 48 orchange exchanging pad 48 with an abrasive pad having different abrasive properties. - It should be appreciated that any type of
pad 48 could be used.Pad 48 could be a piece of sand paper of any grit size. Alternatively, pad 48 could be a polishing pad, buffing pad, or any other pad known in the art. -
FIG. 10 is an exploded drawing of an alternate embodiment of the locking random dual action head assembly of the present invention.Body 130 includesport 128 to receive threadedscrew 118 from a drive motor of the abrading tool (not seen inFIG. 10 ). Similar tobody 30 discussed above,body 130 also includes slidingbolt hole 124 to receive sliding bolt 122 (“bolt 122”). Slidingbolt 122 includesslots 162 and 164 with ridge 164 (not seen inFIG. 10 ) positioned between the two slots. Similar to the locking mechanism discussed above, bolt 122 moves inbolt hole 124 and contacts vertical pin 126 (pin 126″). In the embodiment shown,pin 126 includespin insert 126 c that fits intospring 126 b. Togetherpin insert 126 c andspring 126 b fit intopin 126.Pin 126 fits into biasingspring 125. This assembly fits intobushing 126 a. Similar to bolt 22 andpin 26 described above,slots 162 and 164contact pin 126 with slot 164biasing pin 126 into receivinghole 137 to lockspindle 136 andbody 130 together. -
Rotating element 136 is in the form of a spindle (“spindle 136”).Spindle 136 includes alatitudinal portion 136 a which is asymmetric in shape in relation toaxial portion 136 b. By asymmetric is meant that a greater portion of the area oflatitudinal portion 136 a is one side ofaxial portion 136 b.Latitudinal portion 136 a defines receivinghole 137 which receivespin 126 in the locked mode. - Also seen are two
counterweights Counter weight 140 is releasably attached tobody 130 usingfastener 140 a. In this alternate embodiment,counterweight 140 may comprise a plurality ofindividual counterweights 140 each with different weights and/or shapes. By replacing one ofdifferent counterweights 140 with anothercounterweight 140 different in shape and/or weight, a user may attachdifferent pad assemblies 145 having different weights and/or diameters and still maintain a vibration free rotation ofhead 130 andpad assembly 145. -
Counterweight 141 attached tospindle 136. In a preferred embodiment,counterweight 141 is releasably attached tospindle 136 using screws or other releasable fasteners known in the art. Similar tocounterweight 140, a plurality ofindividual counterweights 141, each differing in weight and/or shape, may be used fordifferent pad assemblies 145.Individual counterweights specific pad assembly 145 to enable even rotation without wobble or vibration. Alternatively, eithercounterweight individual pad assemblies 145 with the other counterweight remaining constant with eachdifferent pad assembly 145. Methods of shaping and fabricating different balancing counterweighs are known to those having skill in the art. -
FIG. 11 is a cross section view of the alternate embodiment seen inFIG. 10 in which rotatingelement 136 is in the unlocked random orbiting mode.FIG. 11 is a cross section view ofdual action head 120 similar to the view seen inFIG. 4 . Similar to rotatinghead 20, first axis ofrotation 152 extends through the center ofport 128 ofshell 130 and is the axis of rotation of a drive motor (not seen) releasably attached to head 120 atport 128.Pin 126 is in the unlocked mode, that is, it is not positioned in receivinghole 137 defined bylatitudinal portion 136 b.Pad assembly 145 is attached to spindle 136 by screw orbolt 146. Together,spindle 136 andpad assembly 145 rotate aroundsecond axis 154 which extends through the center ofaxial portion 136 b. In this unlocked mode,second axis 154 is displaced from and parallel tofirst axis 152. This is also seen in that distance a extending from one edge ofbody 130 tobase support 144 is less than distance b on the opposite side ofbody 130. -
FIG. 12 is a cross section view of the alternate embodiment seen inFIG. 10 in which rotatingelement 136 is locked in position so thatspindle 136 is linked withbody 130 and rotates withbody 130. Similar to the locking assembly and method discussed above, to move the alternate embodiment into the locked mode,pin 122 is moved horizontally to contactpin 126 andbias spring 125 towardspindle 136. The user then rotatesbody 130 untilpin 126 contacts slot 164 onbolt 122 and is forced into receivinghole 137 onspindle 136, thereby releasably lockingbody 130 tospindle 136. In this embodiment,spindle 136 is shaped so that whenhead 130 is turned to the locked mode, it rotates along withbody 130 aroundfirst axis 154. This is also seen in that lengths a′ and b′, analogous to lengths a and b, respectively, inFIG. 11 , are substantiallyequal showing body 130, attached to a drive means atport 128, andpad assembly 145, attached tospindle 136, are both centered on and rotate aboutaxis 152. - It will be recognized that the embodiment seen in
FIGS. 10-12 may also include thereplaceable counterweights 140 and/or 141 so that a particulardual action head 120 may include both replaceable counterweights andspindle 136 that enables a lockedspindle 136 to rotate around thesame axis 152 asbody 130. This provides the advantage of centeringpad assemblies 145 having different sizes with the axis of rotation provided by the drive means of a rotating tool attached tohead 120. - Thus, it is seen that the objects of the present invention are efficiently obtained, although modifications and changes to the invention should be readily apparent to those having ordinary skill in the art, which modifications are intended to be within the spirit and scope of the invention as claimed. It also is understood that the foregoing description is illustrative of the present invention and should not be considered as limiting. Therefore, other embodiments of the present invention are possible without departing from the spirit and scope of the present invention.
Claims (25)
1. A removable head assembly for a rotary tool comprising:
a body arranged for connection to a drive means, said drive means rotatable about a first axis of rotation;
a rotatable element arranged for connection to a pad assembly, said rotatable element rotatable about a second axis of rotation disposed substantially parallel to said first axis of rotation; and,
a locking assembly arranged to releasably lock said rotatable element to said body in axial alignment with said first axis of rotation.
2. The removable head assembly as recited in claim 1 , wherein said locking assembly further comprises a first element displaceable to rotationally lock said rotatable element.
3. The removable head assembly as recited in claim 2 , wherein said locking assembly further comprises a second element engageable with said first element and displaceable to control said displacement of said first element.
4. The removable head assembly as recited in claim 3 , wherein said locking assembly further comprises an elastically deformable element arranged to urge said first element in a first direction and wherein said second element is engageable with said first element to urge said first element in a second direction, opposite said first direction, to lock said rotatable element with said body.
5. The removable head assembly as recited in claim 2 , wherein said rotatable element further comprises at least one receiving feature engageable with said first element when said rotatable element is in axial alignment with said first axis of rotation.
6. The removable head assembly as recited in claim 1 wherein said rotatable element comprises a latitudinal element extending substantially perpendicular to said first axis of rotation wherein said at least one receiving feature is positioned on said latitudinal element.
7. The removable head assembly as recited in claim 1 further comprising at least one counterweight removably attached to said body.
8. The removable head assembly as recited in claim 7 wherein said at least one counterweight is a plurality of counterweights, at least one of said plurality of counterweights different in weight and/or shape from the remainder of said plurality of counterweights and one of said plurality of counterweights is removably attached to said body.
9. The removable head assembly as recited in claim 1 , wherein said pad assembly further comprises a pad base and an abrasive pad.
10. The removable head assembly as recited in claim 9 , wherein said pad base and said abrasive pad are secured to one another by means of a hook and loop fastening system.
11. The removable head assembly as recited in claim 1 , further comprising a rotary tool.
12. The removable head assembly as recited in claim 11 , wherein said rotary tool has an air powered motor.
13. The removable head assembly as recited in claim 1 , further comprising a coupling for detachably securing said head assembly to a rotary tool.
14. The removable head assembly as recited in claim 13 , wherein said coupling comprises a threaded connection.
15. The removable head assembly as recited in claim 13 , wherein said coupling comprises a socket connection.
16. A removable head assembly for a rotary tool comprising:
a body arranged for connection to a drive means, said drive means rotatable about a first axis of rotation;
a rotatable element arranged for connection to a pad assembly, said rotatable element rotatable about a second axis of rotation disposed substantially parallel to said first axis of rotation;
a locking assembly arranged to lock said rotatable element to said body to prevent rotation of said rotatable element relative to said body about said second axis of rotation; and,
at least one counterweight releasably attached to said body.
17. The removable head assembly as recited in claim 16 further comprising at least one counterweight removably attached to said body.
18. The removable head assembly as recited in claim 17 wherein said at least one counterweight is a plurality of counterweights, at least one of said plurality of counterweights different in weight and/or shape from the remainder of said plurality of counterweights and one of said plurality of counterweights is removably attached to said body.
19. The removable head assembly as recited in claim 16 wherein said locking assembly is arranged to releasably lock said rotatable element to said body in axial alignment with said first axis of rotation.
20. The removable head assembly as recited in claim 19 , wherein said locking assembly further comprises a first element displaceable to rotationally lock said rotatable element.
21. The removable head assembly as recited in claim 20 , wherein said locking assembly further comprises a second element engageable with said first element and displaceable to control said displacement of said first element.
22. The removable head assembly as recited in claim 21 , wherein said locking assembly further comprises an elastically deformable element arranged to urge said first element in a first direction and wherein said second element is engageable with said first element to urge said first element in a second direction, opposite said first direction, to lock said rotatable element with said body.
23. The removable head assembly as recited in claim 20 , wherein said rotatable element further comprises at least one receiving feature engageable with said first element when said rotatable element is in axial alignment with said first axis of rotation.
24. The removable head assembly as recited in claim 19 wherein said rotatable element comprises a latitudinal element extending substantially perpendicular to said first axis of rotation wherein said at least one receiving feature is positioned on said latitudinal element.
25. A removable head assembly for a rotary tool comprising:
a body arranged for connection to a drive means, said drive means rotatable about a first axis of rotation;
a rotatable element arranged for connection to a pad assembly, said rotatable element rotatable about a second axis of rotation disposed substantially parallel to said first axis of rotation;
a locking assembly arranged to releasably lock said rotatable element to said body in axial alignment with said first axis of rotation; and,
at least one counterweight releasably attached to said body.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/429,520 US20090209182A1 (en) | 2006-09-05 | 2009-04-24 | Locking random orbital dual-action head assembly |
US12/712,710 US20100151775A1 (en) | 2006-09-05 | 2010-02-25 | Locking random orbital dual-action head assembly with centering |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/516,003 US7713110B2 (en) | 2006-09-05 | 2006-09-05 | Locking random orbital dual-action head assembly |
US12/429,520 US20090209182A1 (en) | 2006-09-05 | 2009-04-24 | Locking random orbital dual-action head assembly |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/516,003 Continuation-In-Part US7713110B2 (en) | 2006-09-05 | 2006-09-05 | Locking random orbital dual-action head assembly |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/712,710 Continuation-In-Part US20100151775A1 (en) | 2006-09-05 | 2010-02-25 | Locking random orbital dual-action head assembly with centering |
Publications (1)
Publication Number | Publication Date |
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US20090209182A1 true US20090209182A1 (en) | 2009-08-20 |
Family
ID=40955568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/429,520 Abandoned US20090209182A1 (en) | 2006-09-05 | 2009-04-24 | Locking random orbital dual-action head assembly |
Country Status (1)
Country | Link |
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US (1) | US20090209182A1 (en) |
Cited By (3)
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WO2011106636A1 (en) * | 2010-02-25 | 2011-09-01 | Dynabrade, Inc. | Locking random orbital dual-action head assembly with centering |
CN103987493A (en) * | 2011-09-26 | 2014-08-13 | 罗伯特·博世有限公司 | Power tool braking device |
US11964352B2 (en) * | 2018-02-14 | 2024-04-23 | Robert Bosch Tool Corporation | Multi-motion accessory |
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CN103987493A (en) * | 2011-09-26 | 2014-08-13 | 罗伯特·博世有限公司 | Power tool braking device |
CN103987493B (en) * | 2011-09-26 | 2016-08-24 | 罗伯特·博世有限公司 | Power tool brake mechanism |
US11964352B2 (en) * | 2018-02-14 | 2024-04-23 | Robert Bosch Tool Corporation | Multi-motion accessory |
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Legal Events
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AS | Assignment |
Owner name: DYNABRADE, INC., NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LAMPKA, MARK;REEL/FRAME:022593/0787 Effective date: 20090423 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |