1 Field of the Invention
The invention relates to collapsible stands, particularly to collapsible stands for bench-top power tools and a method therefore.
2. Background Art
The prior art teaches a variety of stands for supporting bench-top power tools. The prior art stands include various features for enhancing portability and mobility. For example, the prior art teaches collapsible stands that may be collapsed to a compact and generally planar arrangement for transporting the stand when not in use. Conventional bench-top power tool stands includes features for supporting the power tool and securing the power tool thereto for relatively sturdy support during operation of the power tool. A drawback of such prior art stands is that sturdiness is limited by the size of the legs of the stand in order to facilitate compactness of the stand.
The prior art also teaches collapsible work benches that are provided separate from the power tool for supporting a tool thereon. These workbenches are not limited to collapsible dimensions associated with a specific power tool.
A goal of the present invention is to provide a collapsible stand for a bench-top power tool that is sufficiently compact yet stable for supporting a bench-top power tool and may be readily collapsed for transporting the power tool.
An aspect of the present invention is to provide a collapsible stand for a bench-top power tool. The stand includes a first structural member having a top end pivotally connected to a base of an associated power tool at a first end of a lower peripheral region of the base. The first structural member also includes a bottom distal end forming at least one foot to rest upon an underlying support surface. The stand further includes a second structural member having a top end that is both pivotally and slidably connected to the lower peripheral region of the base. The second structural member includes a bottom distal end that also defines a foot to rest on the underlying support surface. An intermediate region of the second structural member is pivotally connected to an intermediate region of the first structural member. A pair of wheels are mounted to the base, approximate to the first end of the first structural member. In an expanded orientation of the stand, the second structural member top end is oriented approximate to a second end of the lower peripheral region, that is spaced apart from the first end. Due to the spacing of the top ends and the pivotal connection of the intermediate regions of the first and second structural members, the bottom ends of the first structural members are spaced apart as well for providing stable support to the power tool. As the stand is collapsed, the second structural member top end converges towards the first structural member top end and the first and second structural members generally converge toward one another to provide a collapsed stand. The first and second structural members are locked relative to the power tool base by a locking member and are utilized by a user for transporting the power tool and stand upon the pair of wheels.
A further aspect of the stand is to provide a foot plan of the stand upon the floor in the expanded orientation that exceeds an associated foot plan of the power tool base.
Another aspect of the present invention is to provide a track within the power tool base for facilitating the sliding engagement of the second structural member thereto.
Yet another aspect of the present invention is to provide a frame within the lower peripheral region of the power tool base for stable support of the power tool upon the stand.
A further aspect of the present invention is to provide a method for collapsing the stand, including the steps of tilting the power tool onto a side of the power tool, unlatching a slidable structural member, translating the slidable structural member to an orientation generally parallel to that of a pivotal structural member that is pivotally connected to both the frame and the slidable structural member, pivoting both structural members to an orientation parallel with the frame, and latching one of the structural members to the frame.
An even further aspect of the invention is a method for expanding the stand. The method includes the steps of resting the power tool on its side, unlatching the slidable structural member, pivoting the slidable structural member and a pivotal structural member to an orientation that is nonparallel with the frame, translating the slidable structural member to an orientation generally divergent to that of the pivotal structural member that is pivotally connected to both the frame and the slidable structural member, and latching one of the structural members to the frame.
The above aspects and other aspects, objects, features, and advantages of the present invention are readily apparent from the following detailed description of the best mode for carrying out the invention when taken in connection with the accompanying drawings.
With reference now to
Specifically, the preferred embodiment table saw 12 includes a generally planar table 18 for supporting workpieces thereon. A base 20 is provided for housing the operational elements of the table saw 12 and for supporting the table 18. A saw blade 22 is provided mounted to a spindle (not shown) that is driven by a motor (not shown) that is housed within the base 20. The saw blade 22 extends through a slot 24 formed through the table 18 for performing cutting operations. The table 18 includes a plurality of channels 26 formed therein for receiving a miter gauge 28 that is utilized for orienting the workpiece relative to the saw blade. The table saw includes a longitudinal rail 30 for supporting a rip fence 32 therealong. The rip fence 32 is provided for establishing a dimension between the rip fence 32 and the saw blade 22 for sliding the workpiece therealong. The table saw 12 further includes a sliding table extension 34 for expanding the longitudinal support area provided by the table 18. An outfeed support 36 for supporting workpieces is provided on the outfeed side of the saw blade 22.
The preferred embodiment table saw 12 includes a blade guard assembly 38 for covering the saw blade 22. The blade guard assembly 38 further includes a riving knife 40 sized and aligned to the kerf of the saw blade 22 to maintain the spacing of the cut workpiece on the outfeed side of the saw blade 22. A pair of anti-kickback pawls 42 are provided to prevent the saw blade 22 from forcing a workpiece in a direction from the outfeed side to the infeed side.
The preferred embodiment table saw 12 includes a plurality of operational controls. A switch 44 is provided for selectively imparting power to the motor which drives the saw blade 22. Additionally, a blade adjusting handle 46 is provided for adjusting the height of the saw blade 22 relative to the table 18. A bevel adjusting handle 48 is provided for adjusting the bevel angle of the saw blade 22, which is defined as the offset angle from an orientation perpendicular to the table saw surface 18. Specifically, the saw blade 22 is illustrated in
Referring now to
The frame 52 is supported by a pivotal support member 62 and a slidable support member 64. The pivotal support member 62 is provided by a pair of pivotal support legs 66, 66′, each pivotally connected to a first longitudinal end 68 of the frame 52, at a pivotal support top end 70, 70′. Each pivotal support top end 70, 70′ of the pivotal support legs 66, 66′ are pivotally mounted to the frame 52 laterally outboard of the frame 52, and laterally outboard of the base lower peripheral region 58. The preferred embodiment stand 14 includes an axle 72 extending transversely through the frame 52 and laterally outboard from the transverse members 54 for spacing the first structural member pivotal structure top ends 70, 70′ away from the base lower peripheral region 58. Further, a pair of wheels 74 are provided, each mounted to opposed distal ends of the axle 72, for transportation of the table saw 12 and stand 14 in a collapsed orientation of the stand 14 as a unitary portable power tool assembly 10. The pivotal support legs 66, 66′ of the pivotal support member 62 extend in a direction downward in the expanded position of the stand 14, and extend longitudinally in the direction toward a second longitudinal end 76 of the frame. The pivotal support legs 66, 66′ each terminate at a pivotal support bottom end 78, 78′ thereof, each defining a foot to rest on the underlying support surface 16.
The slidable support member 64 includes a pair of spaced apart slidable support legs 80, 80′ as well. Slidable support top ends 82, 82′ of each slidable support legs 80, 80′ are pivotally and slidably connected to the longitudinal members 54 of the frame 52. Referring to
Each pivotal support leg 66, 66′ is pivotally coupled to the associated slidable support leg 80, 80′ at an intermediate region of both legs. The pivotal connection of the pivotal support legs 66, 66′ and the slidable support legs 80, 80′ is facilitated by a pair of pivot bolts 88, 88′. The pivot bolts 88, 88′ permit the pair of legs to pivot relative to one another about the respective intermediate regions thereof in a scissor like manner. Further, each pivot bolt 88, 88′ provides a spaced apart connection between the respective pivotal support leg 66, 66′ and the slidable support leg 80, 80′ to accommodate the thickness of the associated longitudinal member 54 to avoid interference therewith. A slot 90 is formed in each longitudinal member 54 and the lower peripheral region 58 of the base 20 to provide clearance for the pivot bolts 88, 88′ in the collapsed orientation of the stand 14. The slots 90 do not interrupt the travel of the sliding members 86 within the channels 84 because the slots 90 have a longitudinal width that is relatively smaller than the longitudinal length of the sliding members 86. Further, each slot 90 includes a pair of leading edges 92 to prevent the sliding member 86 from getting caught or jammed within the slot 90.
The transverse member 56 oriented along the second longitudinal frame end 76 includes a pair of slots 94 formed therein for providing clearance to the slidable support legs 80, 80′ in the collapsed orientation of the stand.
The collapsible stand 14 provides relatively stable support for the table saw 12, yet is collapsible to a relatively compact assembly for facilitating mobility of the collapsible stand 14 and the table saw 12. Each of the slidable support legs 80, 80′ terminate at a bottom distal end 96, 96′, each forming a foot for resting upon the underlying support surface 16. At least one of the leg pivotal bottom ends 78, 78′, 96, 96′, specifically pivotal support leg bottom end 78 is provided with a leveling foot 98 for stabilizing the stand 14 relative to the underlying support surface 16 and overcoming irregularities or inconsistencies in the surface.
The prior art includes collapsible stands for bench-top power tools that collapse into an assembly secured to the power tool for facilitating transportation of both the stand and the power tool. However, such prior art collapsible stands sacrifice stability in the stand itself in order to accommodate compactness. For example, the prior art includes collapsible stands that have a pair of support members that are independent of one another to each fold under the base of the tool. For example, see Assignee's U.S. Pat. No. 6,360,797 B1, issued on Mar. 26, 2002 which discloses a power tool and portable support assembly, and is incorporated in its entirety by reference herein. In contrast the stand 14 of the present invention interconnects the pivotal support member 62 and the slidable support member 64 to enhance stability of the stand 14. The prior art has included a pair of crossed support members pivotally connected at an intermediate region, however the bottom ends of the support members diverge as the stand is collapsed and therefore is limited in overall length in order to accommodate compactness. In contrast, the support members 62, 64 of the present invention converge at both the top ends 70, 82 and the bottom ends 78, 96 thereof due to the tracks provided in the longitudinal members 54 to enhance compactness.
Accordingly, the legs 66, 66′ 80, 80′ of the collapsible stand 14 are provided with a length sufficient so that collapsible stand 14 has an overall foot plan that is greater than a foot plan of the base 20. For example, in the expanded orientation of the collapsible stand 14 the overall longitudinal displacement of the leg bottom ends 78, 96 illustrated by dimension d1 is substantially greater than a longitudinal overall dimension d2 of the base 20. An overall lateral dimension of the base 14 is represented by dimension d3 and is greater than an associated overall lateral dimension d4 of the base 20. This greater lateral dimension d3 is provided by the pivotal support legs 66, 66′ being disposed laterally outboard of the frame 52. The lateral dimension of the slidable support bottom ends 96, 96′ is substantially equivalent to d3 because the slidable support bottom ends 96, 96′ are bent laterally outboard to match the footing of the pivotal support member 62. Accordingly, the collapsible stand 14 provides stabilized support to the table saw 12 wherein the legs are interconnected and the foot plan is not limited by the dimensions of the table saw 12. To further enhance such stability, the slidable support member 64 includes a first cross member 100 interconnecting the slidable support top ends 82, and a second cross member 102 interconnecting the slidable support legs 80 at intermediate regions thereof, specifically below the pivotal connections of the legs.
The table saw 12 and collapsible stand 14 may be rested on the first longitudinal end 68 of the table saw 12 as the stand 14 is collapsed or expanded, as illustrated in
The collapsible stand 14 collapses in a manner wherein the slidable support top ends 82, 82′ translate along the track from the second longitudinal end 76 to the first longitudinal end 68. As the slidable top ends 82, 82′ converge with the pivotal support top ends 70, 70′, the pivotal support member 62 and slidable support member 64 generally converge to an orientation near parallel. Accordingly, the pivotal support legs 66, 66′ each include a bend formed in an intermediate region thereof so that the pivotal support bottom ends 78, 78′ are offset to provide clearance for the outboard laterally flared slidable support bottom ends 96. The pivotal and slidable support members 62, 64 are then pivoted to an orientation generally parallel and aligned with the lower peripheral region 58 of the base 20 and locked in position relative thereto. Referring now to
Referring now to
Referring now to
Upon completion of use of the portable power tool assembly 10, the user may collapse the stand to transport it away from a work site. Referring now to
With reference to
Referring to
Referring now to
Referring now to
In summary, the present invention provides a portable power tool assembly 10 that is structurally supported by a stable collapsible stand 14 that is also relatively compact in the collapsed orientation thereof. The invention contemplates the collapsible stand 14 may be provided separate from an associated power tool or may be provided with the power tool as an assembly as disclosed in the preferred embodiment.
While embodiments of the invention have been illustrated and described, it is not intended that these embodiments illustrate and describe all possible forms of the invention. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the invention.
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