Patent Grant
8991806
The disclosure generally relates to the field of power tools. Particular embodiments relate to table assemblies for power tools.
Power tools are typically used in a workshop, mounted on a workbench. Oftentimes, such power tools are needed to be used at a remote location, such as a jobsite. When used at such a jobsite, the power tool is either placed on a support surface, mounted on a portable workbench (table assembly).
Several exemplary extension table assemblies for power tools are described herein. Such power tools having a working surface for supporting a piece of material to be modified. Such power tools also having a working area where the power tool can modify (e.g., cut) a piece of material.
An exemplary extension table assembly comprises a frame portion, an arm portion, at least one drive system, and a measurement system. The frame portion for supporting the power tool above a surface. The frame portion comprising at least one power tool mount configured for mounting the power tool there-on. The frame portion comprising at least one surface support for supporting the frame portion above a surface, and at least one connector for connecting the frame portion to the arm portion. The arm portion comprising a distal end and a proximal end. The distal and proximal ends defining an arm portion length there-between. The proximal end connects with the frame portion at the connector. The arm portion further comprising a support surface for supporting the piece of material to be modified. It is preferred that the support surface be generally planar to the working surface. The drive system comprising a movable carriage and a shuttle having an end stop. The measurement system for computing the distance between the end stop and the working area to determine a material length.
Another exemplary extension table assembly for a power tool comprises a working surface for supporting a piece of material to be modified, and a working area where the power tool can modify (e.g., cut) a piece of material. The exemplary extension table assembly for a power tool comprising a frame portion, an arm portion, at least one drive system, and a measurement system. The frame portion comprising at least one power tool mount. The power tool mount configured for mounting the power tool there-on. The frame portion comprising at least one surface support for supporting the frame portion above a surface. The frame portion comprising at least one connector for connecting the frame portion to the arm portion. The arm portion comprising a distal end and a proximal end defining an arm portion length therebetween, wherein the proximal end connects with frame portion at the connector. The arm portion further comprising a support surface for supporting the piece of material to be modified, the support surface generally planar to the working surface. The drive system comprising a movable carriage and a shuttle having an end stop, wherein the drive system further comprises a drive for driving the movable carriage along the rail. The measurement system comprises a sensor for sensing the relative position of the end stop relative to the working area and generating an end stop signal. The measurement system further comprises a microprocessor and an alpha-numeric display device. The microprocessor receives the end stop signal from the sensor. The microprocessor determines the distance from the end stop to the working area thereby computing the material length. The microprocessor outputs a length signal corresponding to the material length. The alpha-numeric display device receives the length signal from the microprocessor and provides an alpha-numeric representation of the material length.
Another exemplary extension table assembly comprises a frame portion, an arm portion, at least one drive system, and a measurement system. The frame portion comprising at least one power tool mount. The power tool mount configured for mounting the power tool there-on. The frame portion comprising at least one surface support for supporting the frame portion above a surface. The frame portion comprising at least one connector for connecting the frame portion to the arm portion. The arm portion comprising a distal end and a proximal end defining an arm portion length therebetween, wherein the proximal end connects with frame portion at the connector. The arm portion further comprising a support surface for supporting the piece of material to be modified, the support surface generally planar to the working surface, wherein a first guide channel is defined along the arm portion length, the first guide channel comprising a first rail, the movable carriage configured for moving along the first rail. The extension arm portion having a first end opposite a second end defining an extension arm portion length therebetween, the first end attaching to the distal end via an arm connector, the extension arm portion further comprises a second surface support for supporting the extension arm portion above the surface, the second surface support comprising a plurality of legs, wherein the legs are configured for extending between an extended position and a retracted position, wherein a second guide channel is defined along the extension arm portion length, the second guide channel comprising a second rail, the movable carriage configured for moving along the second rail, the second guide channel aligned with the first guide channel when the arm portion and the extension arm portion are in their use position, wherein the extension arm portion further comprising a second support surface for supporting the piece of material to be modified, the second support surface generally planar to the support surface when the arm portion and the extension arm portion are in their use position. The arm portion and the extension arm portion have a use position and a stowed position, wherein the arm connector comprises a hinge portion for hingedly connecting the extension arm portion to the arm portion, wherein the arm portion and the extension arm portion each comprises an underside surface, wherein in the stowed position the arm portion and the extension arm portion are folded together so that the underside surfaces face one another. The drive system comprising a movable carriage having an end stop, wherein the drive system further comprises a drive for driving the movable carriage along rail, wherein the drive comprises: a drive pulley on a drive shaft, a second pulley on a second shaft, a hand-wheel for turning the drive shaft, and a belt extending between the drive pulley and the second pulley, wherein the movable carriage is attached to the belt, wherein rotation of the hand-wheel in a first direction causes the movable carriage to advance along the rail in a first direction, and wherein rotation of the hand-wheel in a second direction causes the movable carriage to advance along the rail in a second direction. The measurement system comprises a rotary encoder on the drive shaft, the rotary encoder for sensing the relative position of the end stop relative to the working area and generating an end stop signal, wherein the measurement system further comprises a microprocessor and an alpha-numeric display device, wherein the microprocessor receives the end stop signal from the rotary encoder, wherein the microprocessor determines the distance from the end stop to the working area thereby computing the material length, wherein the microprocessor outputs a length signal corresponding to the material length, wherein the alpha-numeric display device receives the length signal from the microprocessor and provides an alpha-numeric representation of the material length.
Additional understanding of the devices contemplated and/or claimed by the inventor can be gained by reviewing the detailed description of exemplary devices and methods, presented below, and the referenced drawings.
The following description and the referenced drawings provide illustrative examples of that which the inventor regards as his invention. As such, the embodiments discussed herein are merely exemplary in nature and are not intended to limit the scope of the invention, or its protection, in any manner. Rather, the description and illustration of these embodiments serve to enable a person of ordinary skill in the relevant art to practice the invention.
The use of “e.g.,” “etc,” “for instance,” “in example,” “for example,” and “or” and grammatically related terms indicates non-exclusive alternatives without limitation, unless otherwise noted. The use of “including” and grammatically related terms means “including, but not limited to,” unless otherwise noted. The use of the articles “a,” “an” and “the” are meant to be interpreted as referring to the singular as well as the plural, unless the context clearly dictates otherwise. Thus, for example, reference to “a belt” includes two or more such belts, and the like. The use of “optionally,” “alternatively,” and grammatically related terms means that the subsequently described element, event or circumstance may or may not be present/occur, and that the description includes instances where said element, event or circumstance occurs and instances where it does not. The use of “preferred,” “preferably,” and grammatically related terms means that a specified element or technique is more acceptable than another, but not that such specified element or technique is a necessity, unless the context clearly dictates otherwise. The use of “exemplary” means “an example of” and is not intended to convey a meaning of an ideal or preferred embodiment.
The use of “power tool” means “a tool that is actuated by an additional power source and mechanism other than the solely manual labor used with hand tools,” unless the context clearly dictates otherwise. Examples of power tools include, but are not limited to, saws (e.g., chop saws, miter saws, cut-off saws, band saws, radial arm saws, scroll saws, table saws), shears, grinders, sanders, jointers, planers, trimmers, drills, tile cutters, and routers.
The use of “material” means “the material the power tool modifies (e.g., cuts, melts, crimps, drills),” unless the context clearly dictates otherwise. Examples of material include, but are not limited to, dimensional lumber, pipe, tubing, wire, and structural steel (e.g., beams, angle iron, channel, rods, bars, plate).
The use of “working area” mean “the location where the power tool modifies the material,” unless the context clearly dictates otherwise. Examples of working areas include, but are not limited to, the plane of cut of a saw, and the point where a drill bit engages material.
A first embodiment of the inventive concept(s) is illustrated in
The first exemplary extension table assembly 10 comprises a frame portion 20 for supporting the power tool 2 above a surface 3, an arm portion 40, at least one drive system 60, and a measurement system 80. Optionally, an extension arm portion 50 is provided.
The frame portion 20 comprising at least one power tool mount 21. The power tool mount 21 particularly illustrated in
In the first exemplary extension table assembly 10, the power tool mount 21 comprises a left support 121 and a right support 122 which allow the power tool 2 to be easily connected to and disconnected from the frame portion 20. For illustrative purposes,
It is preferred that the power tool mount 21 be fixed in location relative to the frame portion 20 and the arm portion 40. In such a configuration, the frame portion 20 and power tool mount 21 are located at a first end of the extension table assembly 10 with the arm portion 40 and extension arm portion 50 (if present) extending away there-from.
In the power tool mount 21 illustrated with the first exemplary extension table assembly 10, the left support 121 further comprises at least one connector for allowing the power tool mount 21 to be connected to the frame portion 20. While the first extension table assembly 10 illustrates this as a lateral connection, other orientations of connections are also envisioned.
In the first exemplary extension table assembly 10, provided are two lateral connectors, namely a proximal lateral connector 123 and a distal lateral connector 124. The lateral connectors (123, 124) comprising heads (125, 126) configured for sliding into channels (127, 128) defined in the frame portion 20, thereby laterally connecting the power tool mount 21 to the frame portion 20. In such a configuration, the power tool mount 21 can rest upon the frame portion 20. Other manners of attaching the power tool to the extension table assembly are also envisioned. The lateral connectors can be adjustable for allowing a user to better fix the power tool to the extension table assembly once attached, for instance through the tightening of one or more bolts.
In such a configuration, where the left support 121 is attached to the bottom of the power tool 2, a user desiring to remove the power tool from the extension table assembly merely needs to lift upwards on the power tool 2 to disengage the lateral connectors (123, 124) from their connection with the channels (127, 128), thereby enabling the user to remove the power tool 2 from the extension table assembly 10. To connect the power tool 2 to the extension table assembly 10, the reverse process utilized, with the power tool 2 set onto the extension table assembly 10 with the lateral connectors (123, 124) engaging the channels (127, 128).
Referring now to
In the first exemplary extension table assembly 10, the connector 23 comprising the bolting of the proximal end 42 of the arm portion 40 to the first side 24 of the frame portion 20. Other types of connectors could be used for connecting these two components together, and a skilled artisan will be able to select an appropriate structure and material for the connector and connection in a particular embodiment based on various considerations, including the intended use of the extension table assembly, the intended arena within which the extension table assembly will be used, and the equipment and/or accessories with which the extension table assembly is intended to be used, among other considerations.
The arm portion 40 further comprises a support surface 44, and the extension arm portion 50 further comprises a second support surface 90. The support surface 44 and the second support surface 90 for supporting a piece of material 6 to be modified. It is preferred that the second support surface 90 be generally planar to the support surface 44 when the arm portion 40 and the extension arm portion 50 are in their use position (described below). It is further preferred that the working surface 4 of the power tool 2 be generally planar with the support surface 44 of the arm portion (and second support surface 90 of the extension arm portion 50, when present and in their use position).
Depending upon the particular make and model of power tool 2 used, the height of the working surface 4 relative to the support surface 44 may need to be adjusted through use of a horizontal adjustment device. One exemplary horizontal adjustment device 130 is illustrated in
In the first extension table assembly 10, the adjustable risers 129 extend downwards from the left support 121 and right support 122 of the power tool mount 21 for contacting a base surface 120 of the frame portion 20. Alternatively, the adjustable risers could extend upwards from the base surface 120 of the frame portion 20 for contacting the under side of the power tool and/or the under side of the power tool mount 21. Horizontal adjustment can be accomplished through any number of mechanical apparatuses, including, but not limited to, bolts, pins, rods, and bumpers. Such mechanical apparatuses may be fixed in height and/or may be adjustable, for instance, by the turning of a bolt head to adjust height. Other types of horizontal adjustment devices include, but are not limited to, spacers and/or spacer plates.
As illustrated particularly in
In the first exemplary extension table assembly 10, the legs (55, 155) are configured for extending between an extended position (use) and a retracted position (stowed).
It is further preferred that the surface support 22 comprise at least one wheel support 99 configured for contacting an operational surface 3 when the legs (55, 155) are in the retracted position. One embodiment of a surface support 22 is illustrated in
In the first exemplary extension table assembly, the wheel supports (99, 199) further comprise a mount (76, 176) having a storage rest (78, 178) configured for resting upon the surface 3 when the extension table assembly 10 is in its stowed position/storage mode. It is preferred that a kickstand 79 be further provided for stabilizing the extension table assembly 10 when in its stowed position/storage mode, as illustrated in
Referring to
As illustrated in
Referring now to
Again, while the exemplary extension table assembly 10 is illustrated having a pair of arm portions (the arm portion 40, and the extension arm portion 50), more or less arm portions could be provided in a given extension table assembly, and a skilled artisan will be able to select an appropriate number and configuration of arm portions for the extension table assembly in a particular embodiment based on various considerations, including the intended use of the extension table assembly, the intended arena within which the extension table assembly will be used, and the equipment and/or accessories with which the extension table assembly is intended to be used, among other considerations.
In the first exemplary extension table assembly 10, the first end 51 for the extension arm portion 50 attaches to the distal end 41 of the arm portion 40 through use of an arm connector 53. In the first exemplary extension table assembly, the arm connector 53 comprises at least one hinge portion 56 for hingedly connecting the extension arm portion 50 to the arm portion 40. In another exemplary extension table assembly (not illustrated), the extension arm portion is configured for telescopically extending from the arm portion. While the first exemplary extension table assembly utilizes a hinged arm connector connection, a skilled artisan will be able to select an appropriate structure and configuration for a connector for the extension table assembly in a particular embodiment based on various considerations, including the intended use of the extension table assembly, the intended arena within which the extension table assembly will be used, and the equipment and/or accessories with which the extension table assembly is intended to be used, among other considerations.
Together, the arm portion 40 and the extension arm portion 50 have a use position (illustrated in
As illustrated in
When in the use position, the arm portion 40 and the extension arm portion 50 are unfolded from facing one another, and the arm portion 40 and the extension arm portion 50 are arranged in an end-to-end fashion with the underside surfaces (47, 57) generally planar with one another, as illustrated in
As illustrated in
The drive system 60 for providing a movable end stop location. The drive system 60 comprises a movable carriage 61 and a shuttle 70 having an end stop 71. The end stop 71 providing a location (first surface 35, second surface 36) against which an end of the material 6 to be cut is placed. The movable carriage 61 configured for moving along the first rail 46 of the arm portion 40, and the second rail 59 of the extension arm portion 50.
In the first exemplary extension table assembly 10, the movable carriage 61 is bolted to the belt 68. While bolting the movable carriage to the belt is disclosed and illustrated, a skilled artisan will be able to select an appropriate manner of connecting the two structures together in a particular embodiment based on various considerations, including the intended use of the extension table assembly, the intended arena within which the extension table assembly will be used, and the equipment and/or accessories with which the extension table assembly is intended to be used, among other considerations.
In the first exemplary extension table assembly 10 illustrated in the Figures, the drive system 60 comprise a drive 62 for driving the movable carriage 61 along the first rail 46 of the arm portion 40, and the second rail 59 of the extension arm portion 50. Referring particularly to
As illustrated in
Referring back to
Alternatively, the drive could comprise a linear actuator drive system, a rack-and-pinion system, a belt-drive system, a roller chain system, a helical gear system (aka “worm gears”), a cable/rope and pulley system, or other systems, and a skilled artisan will be able to select an appropriate drive for the extension table assembly in a particular embodiment based on various considerations, including the intended use of the extension table assembly, the intended arena within which the extension table assembly will be used, and the equipment and/or accessories with which the extension table assembly is intended to be used, among other considerations. Further, the drive could be mechanical actuator powered, hydraulic actuator powered, pneumatic actuator powered, piezoelectric actuator powered, electromechanical powered, telescoping linear powered, or other systems and a skilled artisan will be able to select an appropriate drive for the extension table assembly in a particular embodiment based on various considerations, including the intended use of the extension table assembly, the intended arena within which the extension table assembly will be used, and the equipment and/or accessories with which the extension table assembly is intended to be used, among other considerations.
Referring now to
The end stop 71 for abutting an end of material 6 to be worked, having a first surface 35 for contacting material, and a second surface 36 for contacting material. In the first exemplary extension table assembly 10, the shuttle 70 comprises a generally L-shaped body having an end stop 71 extending there-from as one of the legs of the general L-shape.
In the first exemplary extension table assembly 10, as illustrated in
Further, the shuttle 70 can be detached from the movable carriage 61 and rotated one-hundred eighty degrees, so that the first bore 72 can be slid onto the second pin 75, and the second bore 73 can be slid onto the first pin 74. Such a configuration allowing the end stop 71 to, optionally, be located closer to, or further from, the working area 8, for instance when a very short piece of material 6 is modified, thereby enabling the first surface 35 or the second surface 36 to contact the material 6 (a first surface facing position (the working area) and a second surface facing position). Further, the shuttle 70 can be detached from the movable carriage 61 so as to allow a very long length of material 6 to extend past the location of the movable carriage 61.
It is preferred that the extension table assembly 10 further comprise a carriage position lock 69 for selectively preventing rotation of the drive shaft 64 or otherwise preventing the drive system 60 (and the movable carriage 61) from moving. By preventing rotation of the drive shaft 64, the movable carriage 61 is able to be fixed in place so that the first surface 35 (or the second surface 36) of the end stop 71 is locked a predetermined distance from the working area 8. As particularly illustrated in
While this is the preferred configuration for a carriage position lock 69, other types of mechanisms and systems could be used for locking the position of the carriage (e.g., self locking helical gears, self locking motors), and a skilled artisan will be able to select an appropriate structure and material for the lock in a particular embodiment based on various considerations, including the intended use of the extension table assembly, the intended arena within which the extension table assembly will be used, and the equipment and/or accessories with which the extension table assembly is intended to be used, among other considerations. In one example, the lock system comprises a brake disc and brake caliper style system.
Referring now, particularly, to
The first exemplary extension table assembly 10 further comprises a measurement system 80 for computing the distance between the first surface 35 and/or the second surface 36 of the end stop 71 and the working area 8 to determine a material length. The measurement system 80 comprises a sensor 81 for sensing the relative position of the first surface 35 and/or the second surface 36 of the end stop 71 relative to the working area 8. Based upon this measurement, the sensor 81 generates an end stop signal. The sensor 81 illustrated in the figures comprising a rotary encoder connected to the drive shaft 64, wherein rotation of the drive shaft 64 is converted to analog or digital code (the end stop signal). For instance rotation of one degree could be equal to 1/32 of an inch in length. While a rotary encoder is the preferred sensor, other types of mechanisms and systems could be utilized, and a skilled artisan will be able to select an appropriate structure and material for the sensor in a particular embodiment based on various considerations, including the intended use of the extension table assembly, the intended arena within which the extension table assembly will be used, and the equipment and/or accessories with which the extension table assembly is intended to be used, among other considerations. Examples of other sensors include, but are not limited to, other types of encoders (e.g., optical encoders, mechanical encoders, electronic encoders), laser measurement (e.g., laser rangefinders such as those manufactured by Dimetix AG), ultrasonic measurement, and “digital tape measures.”
The measurement system 80 further comprises a microprocessor 82 and an alpha-numeric display device 83. In the figures, the microprocessor 82 is integrated into the housing of the alpha-numeric display device 83. In other embodiments, the microprocessor may be located separate therefrom. The microprocessor 82 receives the end stop signal from the sensor 81, and determines the distance from the end stop 71 to the working area 8. In doing so, the material length can be computed. This computation can further take into consideration whether the carriage is in its first surface facing position, or its second surface facing position, factoring the length or offset of the shuttle 70 into the computation, as necessary.
Preferably, the microprocessor 82 outputs a length signal corresponding to the material length. The alpha-numeric display device 83 receives the length signal from the microprocessor 82, and provides an alpha-numeric representation of the material length to an operator of the extension table assembly 10, for instance that the first surface 35 of the end stop 71 is located six-feet, two and one-quarter inches from the working area 8.
Additionally, given inputs from the operator for compound cuts such as spring angle of the material, various widths and thicknesses of the material, and/or the wall condition for the cut, the microprocessor 82 can provide an output to the alpha-numeric display device 83 for the operator representing the bevel and miter angles at which to set the saw. Further, given an end stop signal, the microprocessor 82 can provide the shortest-to-shortest, longest-to-longest, shortest-to-longest, and/or the longest-to-shortest point lengths on rectangular and crown molding materials in a compound cut.
In the first exemplary extension table assembly 10, where the power tool 2 comprises a miter saw, the alpha-numeric display device 83 could display other information, including but not limited to: the current angle (in the vertical plane) of the saw blade relative to the material (miter cut); the distance from the inside corner (of a miter cut) to the end stop (first surface 35 and/or second surface 36); the distance from the outside corner (of a miter cut) to the end stop (first surface 35 and/or second surface 36); the distance from between two inside, two outside, inside-to-outside, or outside-to-inside corners of a miter cut (first surface 35 and/or second surface 36) when the material is placed against the end stop; the distance between two first edges, two second edges or one of each edge of a bevel cut (1st/2nd surface) when the material is placed against the end stop; the current angle (in a bisecting plane) of the saw blade relative to the material (bevel cut); the distance from the first edge (of a bevel cut) to the end stop (first surface 35 and/or second surface 36); the distance from a second edge (of a bevel cut) to the end stop (first surface 35 and/or second surface 36); the distance between two first edges, two second edges or one of each edge of a bevel cut (first surface 35 and/or second surface 36) when the material is placed against the end stop; etc. It is preferred that an operator would be able to change the display of the alpha-numeric display device to display information in feet/inches/fractions, inches/fractions, metric units, etc.
A second exemplary extension table assembly for power tools comprises one or more of at least one tool mount, at least two arm portions, at least one guide channel, a carriage, at least one end stop assembly, a drive system, a measurement system, an alpha-numeric display device, at least one hinge connecting the arm portions together, and legs.
A third exemplary extension table assembly for power tools comprises one or more of at least one tool mount, at least one arm portion, at least one guide channel, a carriage, at least one end stop assembly, a drive system, a measurement system, and an alpha-numeric display device.
A fourth exemplary extension table assembly for power tools comprises one or more of at least one tool mount, at least two arm portions, a carriage, at least one end stop assembly, a drive system, a measurement system, an alpha-numeric display device, a connector connecting said arm portions together.
An exemplary extension table assembly for a power tool having a working surface for supporting a piece of material to be modified, and a working area where the power tool can modify (e.g., cut) a piece of material. The exemplary extension table assembly comprising a frame portion, an arm portion, at least one drive system, and a measurement system. The frame portion for supporting the power tool above a surface. The frame portion comprising at least one power tool mount configured for mounting the power tool there-on. The frame portion comprising at least one surface support for supporting the frame portion above a surface, and at least one connector for connecting the frame portion to the arm portion. The arm portion comprising a distal end and a proximal end. The distal and proximal ends defining an arm portion length there-between. The proximal end connects with the frame portion at the connector. The arm portion further comprising a support surface for supporting the piece of material to be modified. It is preferred that the support surface be generally planar to the working surface. The drive system comprising a movable carriage and a shuttle having an end stop. The measurement system for computing the distance between the end stop and the working area to determine a material length.
Preferably, the power tool mount is fixed in location relative to the frame portion, and fixed in place relative to the arm portion. Preferably, the frame portion comprises a first side opposite a second side, wherein the connector attaches the arm portion to the frame portion so that the arm portion generally extends away from the first side. Preferably, the surface support comprises a plurality of legs, wherein the legs are configured for extending between an extended position and a retracted position, and wherein the surface support comprises at least one wheel configured for contacting the surface when the legs are in the retracted position. Preferably, a first guide channel is defined along the arm portion length, the first guide channel comprising a rail, the movable carriage configured for moving along the rail. Preferably, the extension table assembly further comprises an extension arm portion having a first end opposite a second end defining an extension arm portion length therebetween, the first end attaching to the distal end via an arm connector. Preferably, the extension arm portion further comprises a second surface support for supporting the extension arm portion above the surface. Preferably, the second surface support comprises a plurality of legs, wherein the legs are configured for extending between an extended position and a retracted position. Preferably, the arm portion and the extension arm portion have a use position and a stowed position, wherein the arm connector comprises a hinge portion for hingedly connecting the extension arm portion to the arm portion, wherein the arm portion comprises an underside surface and the extension arm portion comprises an underside surface, wherein in the stowed position the arm portion and the extension arm portion are folded together so that the underside surfaces face one another. Preferably, a second guide channel is defined along the extension arm portion length, the second guide channel comprising a second rail, the movable carriage configured for moving along the second rail, the second guide channel aligned with the first guide channel when the arm portion and the extension arm portion are in their use position. Preferably, the extension arm portion further comprises a second support surface for supporting the piece of material to be modified, the second support surface generally planar to the support surface when the arm portion and the extension arm portion are in their use position. Preferably, the measurement system comprises a sensor for sensing the relative position of the end stop relative to the working area and generating an end stop signal. Preferably, the measurement system further comprises a microprocessor and an alpha-numeric display device, wherein the microprocessor receives the end stop signal from the sensor, wherein the microprocessor determines the distance from the end stop to the working area thereby computing the material length, wherein the microprocessor outputs a length signal corresponding to the material length, wherein the alpha-numeric display device receives the length signal from the microprocessor and provides an alpha-numeric representation of the material length. Preferably, the drive system further comprises a drive for driving the movable carriage along the rail. Preferably, a first guide channel is defined along the arm portion length, the first guide channel comprising a rail, the movable carriage configured for moving along the rail, wherein the drive drives the movable carriage along the rail. Preferably, the drive comprises: a drive pulley on a drive shaft, a second pulley on a second shaft, a hand-wheel for turning the drive shaft, and a belt extending between the drive pulley and the second pulley, wherein the movable carriage is attached to the belt, wherein rotation of the hand-wheel in a first direction causes the movable carriage to advance along the rail in a first direction, and rotation of the hand-wheel in a second direction causes the movable carriage to advance along the rail in a second direction. Preferably, the drive further comprises a lock for preventing rotation of the drive shaft thereby locking the movable carriage in place.
Preferably, the power tool is a saw. Preferably, the power tool working area comprises the plane of cut of the saw where the saw is configured for cutting the/a piece of material. Preferably, the power tool mount comprises a platform defining a plurality of mounting holes defined there-through, wherein a plurality of bolts can be inserted through the mounting holes and threaded into threaded holes defined in the power tool thereby attaching the power tool to the power tool mount.
Optionally, the frame portion comprises one or more spacers for spacing the tool apart from the platform, the spacers comprising a plurality of spacer holes defined there-through, the one or more of the spacer holes configured for alignment with one or more of the mounting holes, wherein at least one of the plurality of bolts extends through one of the mounting holes and is threaded into one of the threaded holes.
An exemplary extension table assembly for a power tool having a working surface for supporting a piece of material to be modified, and a working area where the power tool can modify (e.g., cut) a piece of material. The exemplary extension table assembly for a power tool comprising a frame portion, an arm portion, at least one drive system, and a measurement system. The frame portion comprising at least one power tool mount. The power tool mount configured for mounting the power tool there-on. The frame portion comprising at least one surface support for supporting the frame portion above a surface. The frame portion comprising at least one connector for connecting the frame portion to the arm portion. The arm portion comprising a distal end and a proximal end defining an arm portion length therebetween, wherein the proximal end connects with frame portion at the connector. The arm portion further comprising a support surface for supporting the piece of material to be modified, the support surface generally planar to the working surface. The drive system comprising a movable carriage and a shuttle having an end stop, wherein the drive system further comprises a drive for driving the movable carriage along the rail. The measurement system comprises a sensor for sensing the relative position of the end stop relative to the working area and generating an end stop signal. The measurement system further comprises a microprocessor and an alpha-numeric display device. The microprocessor receives the end stop signal from the sensor. The microprocessor determines the distance from the end stop to the working area thereby computing the material length. The microprocessor outputs a length signal corresponding to the material length. The alpha-numeric display device receives the length signal from the microprocessor and provides an alpha-numeric representation of the material length.
Preferably, the extension table assembly comprises an extension arm portion. The extension arm portion having a first end opposite a second end defining an extension arm portion length there-between. The first end attaching to the distal end via an arm connector. The extension arm portion further comprises a second surface support for supporting the extension arm portion above the surface. The second surface support comprising a plurality of legs. The legs are configured for extending between an extended position and a retracted position.
Preferably, a second guide channel is defined along the extension arm portion length. The second guide channel comprising a second rail. The movable carriage configured for moving along the second rail. The second guide channel aligned with the first guide channel when the arm portion and the extension arm portion are in their use position. The extension arm portion further comprising a second support surface for supporting the piece of material to be modified, the second support surface generally planar to the support surface when the arm portion and the extension arm portion are in their use position.
Preferably, the arm portion and the extension arm portion have a use position and a stowed position. The arm connector comprising a hinge portion for hingedly connecting the extension arm portion to the arm portion. The arm portion comprises an underside surface and the extension arm portion comprises an underside surface, wherein in the stowed position the arm portion and the extension arm portion are folded together so that the underside surfaces face one another.
An exemplary extension table assembly for a power tool having a working surface for supporting a piece of material to be modified, and a working area where the power tool can modify (e.g., cut) a piece of material. The exemplary extension table assembly for a power tool comprising a frame portion, an arm portion, at least one drive system, and a measurement system. The frame portion comprising at least one power tool mount. The power tool mount configured for mounting the power tool there-on. The frame portion comprising at least one surface support for supporting the frame portion above a surface. The frame portion comprising at least one connector for connecting the frame portion to the arm portion. The arm portion comprising a distal end and a proximal end defining an arm portion length therebetween, wherein the proximal end connects with frame portion at the connector. The arm portion further comprising a support surface for supporting the piece of material to be modified, the support surface generally planar to the working surface, wherein a first guide channel is defined along the arm portion length, the first guide channel comprising a first rail, the movable carriage configured for moving along the first rail. The extension arm portion having a first end opposite a second end defining an extension arm portion length therebetween, the first end attaching to the distal end via an arm connector, the extension arm portion further comprises a second surface support for supporting the extension arm portion above the surface, the second surface support comprising a plurality of legs, wherein the legs are configured for extending between an extended position and a retracted position, wherein a second guide channel is defined along the extension arm portion length, the second guide channel comprising a second rail, the movable carriage configured for moving along the second rail, the second guide channel aligned with the first guide channel when the arm portion and the extension arm portion are in their use position, wherein the extension arm portion further comprising a second support surface for supporting the piece of material to be modified, the second support surface generally planar to the support surface when the arm portion and the extension arm portion are in their use position. The arm portion and the extension arm portion have a use position and a stowed position, wherein the arm connector comprises a hinge portion for hingedly connecting the extension arm portion to the arm portion, wherein the arm portion and the extension arm portion each comprises an underside surface, wherein in the stowed position the arm portion and the extension arm portion are folded together so that the underside surfaces face one another. The drive system comprising a movable carriage having an end stop, wherein the drive system further comprises a drive for driving the movable carriage along rail, wherein the drive comprises: a drive pulley on a drive shaft, a second pulley on a second shaft, a hand-wheel for turning the drive shaft, and a belt extending between the drive pulley and the second pulley, wherein the movable carriage is attached to the belt, wherein rotation of the hand-wheel in a first direction causes the movable carriage to advance along the rail in a first direction, and wherein rotation of the hand-wheel in a second direction causes the movable carriage to advance along the rail in a second direction. The measurement system comprises a rotary encoder on the drive shaft, the rotary encoder for sensing the relative position of the end stop relative to the working area and generating an end stop signal, wherein the measurement system further comprises a microprocessor and an alpha-numeric display device, wherein the microprocessor receives the end stop signal from the rotary encoder, wherein the microprocessor determines the distance from the end stop to the working area thereby computing the material length, wherein the microprocessor outputs a length signal corresponding to the material length, wherein the alpha-numeric display device receives the length signal from the microprocessor and provides an alpha-numeric representation of the material length.
Additional understanding of the devices and methods contemplated and/or claimed by the inventor(s) can be gained by reviewing the detailed description of exemplary devices and methods, presented below, and the referenced drawings.
Any suitable structure and/or material can be used for the components of an exemplary extension table assembly, and a skilled artisan will be able to select an appropriate structure and material for the components in a particular exemplary extension table assembly based on various considerations, including the intended use of the extension table assembly, the intended arena within which the extension table assembly will be used, and the equipment and/or accessories with which the extension table assembly is intended to be used, among other considerations. For instance, the components of the extension table assembly could be made from aluminum or another metal, plastic (e.g., nylon, polyoxymethylene, fiberglass reinforced plastic, and the like. Further, arm portion and extension arm portion (if present) could be manufactured through any commonly used manufacturing method, including, but not limited to extruding and pultruding.
It is noted that all structure and features of the various described and illustrated exemplary extension table assemblies can be combined in any suitable configuration for inclusion in an extension table assembly according to a particular embodiment.
It is noted that all structure and features of the various described and illustrated embodiments can be combined in any suitable configuration for inclusion in an extension table assembly according to a particular embodiment. For example, an extension table assembly according a particular embodiment can include neither, one, or both of the arm portion and the extension arm portion described above. Furthermore, an extension table assembly according to a particular embodiment can include either the measurement system and the drive system described above in combination with neither, one, or both of the measurement system and drive system described above.
The foregoing detailed description provides exemplary embodiments of the invention and includes the best mode for practicing the invention. The description and illustration of these embodiments is intended only to provide examples of the invention, and not to limit the scope of the invention, or its protection, in any manner.
This application claims the benefit of U.S. Provisional Application No. 61/635,387, filed 19 Apr. 2012, the disclosure of which is incorporated by reference.
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| Number | Date | Country | |
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| Number | Date | Country | |
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| 61635387 | Apr 2012 | US |
