The present invention generally relates to the field of woodworking tools, and particularly to a table saw enabled with dual saw blade functionality.
Wood working operations are performed using a variety of tools which come in a variety of sizes. Typically, woodworkers select their tools based on any number of factors, which may include available shop space, efficiency of tool operation, costs, and functionality provided. Often woodworkers are faced with having to use multiple tools to accomplish a single task or engage in time consuming, preparatory steps in order to achieve their goals. For example, much time may be consumed in changing the working tool mounted in the workstation, such as a saw, because the woodworker must physically remove a power tool from a workstation in order to conduct a second operation. This process may be quite disruptive, consuming time and decreasing production capabilities which may lead to user dissatisfaction.
Unfortunately, for operations that require the use of multiple power tools, there has not been provided an easy to use, affordable tool that provides such multiple functionality. While capabilities exist, for instance to switch out saw blades in a power saw, this still consumes time away from performing the operation at hand. Also, available space has become a factor in decreasing the usefulness of tools when a user has to sacrifice the efficient use of one tool in order to have a second tool available.
Therefore, it would be desirable to provide a power tool with multiple functionalities that utilized a limited amount of space.
Accordingly, the present invention is directed to a table saw which provides an operator the ability to operate two saws utilizing substantially the same floor space as would be occupied by a commonly available table saw. This is of particular advantage to power tool operators who have limited space within which to operate the power tools. The apparatus of the present invention is also advantageous to a power tool operator who may need to perform a variety of operations upon a work piece. For instance, a typical table saw may require a change of blades to perform two different cuts. The table saw of the present invention may present both blades to an operator saving them significant time and effort, thereby increasing productivity and decreasing fatigue.
In a first aspect of the present invention, a table saw comprises a first workstation disposed with a first power tool and a second workstation disposed with a second power tool. A worktable couples with the first and second workstations. The worktable includes a first power tool access assembly disposed in relation to the first power tool and a second power tool access assembly disposed in relation to the second power tool. The worktable provides for dual operation of the first and second power tool.
For example, the first and second power tools may both be saw assemblies. The first saw assembly may be operably engaged by a combination bevel and height adjustment assembly while the second saw assembly may be operably engaged by only a height adjustment assembly. The enabling of only one blade with beveling capabilities may reduce the costs to the consumer for the table saw of the present invention. Further, typical consumers of power saws, such as table saws, often desire the ability to perform bevel cuts and are willing to absorb the increased labor costs of re-positioning a single blade table saw system for such functionality. Further, consumers are often unwilling to bear the increased expense of buying a second table saw system in order to perform their straight cuts. The present invention provides a user a single system which provides both bevel cutting and straight cutting, increasing the efficiency with which they may perform their tasks. Additionally, the present invention may reduce the costs of having dual systems available.
Another advantage of the present invention is that the user may perform dual cutting functions at the same time upon a work piece, perform the cuts in sequence, or even make use of only one of the saws. For example, a woodworker may use both blades at once to pre-cut specified work pieces. Alternately, a woodworker may lower the second saw assembly, using the height adjustment assembly, below the plane of the worktable and perform a cut using only the first saw assembly. In such a configuration a user of the table saw may perform all types of cuts using the first saw assembly, such as beveled cuts, while maintaining a second straight cut capability just below the surface which may be easily accessed by a user through the height adjustment assembly.
In a second aspect of the present invention, a table saw assembly is provided comprising a worktable including a first blade access assembly and a second blade access assembly. A first workstation is coupled with the worktable, the first workstation comprising a saw assembly including a motor coupled with a first saw blade. The first saw blade operationally engages through the first blade access assembly of the worktable. A second workstation is also coupled with the worktable, the second workstation comprising a saw assembly including a motor coupled with a second saw blade, the second saw blade operationally engaging through the second blade access assembly of the worktable. The worktable provides for dual operation of the first saw blade and the second saw blade.
In an additional aspect of the present invention, a method for performing woodworking operations is given. The method includes a first step of performing a first wood working operation using a first power tool disposed within a first workstation and operationally engaged through a first power tool access assembly disposed on a worktable. A second step includes performing a second wood working operation using a second power tool disposed within a second workstation and operationally engaged through a second power tool access assembly disposed on the worktable. Wherein the worktable enables dual operation of the first and second power tool.
It is to be understood that both the forgoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed. The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate an embodiment of the invention and together with the general description, serve to explain the principles of the invention.
The numerous advantages of the present invention may be better understood by those skilled in the art by reference to the accompanying figures in which:
Reference will now be made in detail to the presently preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings.
Referring generally now to
Further, the worktable 106 may have an extension member, such as an extendible wing(s), to enable a larger planar work surface. The extension member may be connected to one or both ends of the worktable 106. For example, on the end of the worktable 106 proximal to the first workstation 102, an extendible wing assembly may be connected. The extendible wing assembly may include a planar extension member connected to the end of the worktable 106 via a mechanical connector. The mechanical connector, being a spring loaded joint, allows a user of the extension member to securely position the planar extension member in a first “extended” position along the same plane as the worktable 106 or retract the planar extension member into a second “closed” position. The second “closed” position may vary in that any positioning of the planar extension member, other than in a planar relationship with the worktable 106, may be the closed position. The extension member provides a user of the table saw assembly 100 with the ability to support variously sized work pieces during the performance of a cut by the table saw assembly 100. It is contemplated that various mechanical connection systems may be employed to enable the functionality of the extension member, such as a snap-lock system, latch system, compression lock system, and the like. Further various fasteners may be utilized to connect the planar extension member to the worktable 106, such as screws, bolts, clips, pins, and the like, which provide a secure mechanical connection.
Preferably, the first workstation 102 includes a first housing 103 disposed with a saw assembly comprising a motor coupled with a first saw blade 104. Accordingly, the second workstation 108 includes a second housing 109 including a saw assembly comprising a motor coupled with a second saw blade 110. The first saw blade 104 extends up through a first power tool access assembly 112 in the worktable 106. In the current embodiment, the first power tool access assembly 112 is a throat plate for allowing the first saw blade 104 to extend through the worktable 106. The first and/or second saw blade 104 and 110 may be a dado blade, a narrow kerf blade, a carbide blade, and the like, to allow a user the ability to determine and perform a wide variety of cuts. A second saw assembly, disposed within the housing 109 of the second workstation, includes a motor coupled with a second saw blade 110 extending up through a second power tool access assembly 114. It is to be understood that the first and second power tool access assembly 112 and 114 may be similarly configured and constructed or may differ from one another. For example, the first power tool access assembly 112 may be a throat plate configured with a first and second plate, which interlock while the second power tool access assembly 114 may be a throat plate configured with a single plate. Other variations of the power tool access assemblies, as contemplated by those of ordinary skill in the art, may be employed.
Preferably, the first and second workstation 102 and 108 are constructed of cast iron or metal of sufficient strength to collectively support a worktable. The sheet metal may be a framework of interconnected posts or beams or may be formed in such a manner as to be a sufficiently rigid durable structure without a framework. The posts of a framework may be solid or hollow and may have cross sections that are circular, oval, square, or rectangular. Sheets of strong, rigid, and durable material, such as metal, plastic, or wood, are attached to the framework. The sheets, with or without a framework, may be secured by screws, bolts, rivets, welded joints, and the like. Enhanced structural strengthening members may be added to the workstation. For example, reinforcing posts, beams, ribs, and the like may be mounted between the substantially vertical side surfaces and/or posts of the workstation body. The reinforcing elements may even form a reinforcing structure which extends as a three dimensional matrix through large portions of the interior of the workstation.
It is contemplated that reinforcing members, such as beams, may be used to secure the two workstations together in such a manner as to cause the two workstations to essentially move in unison. This may provide increased ease of use in a work environment where the table saw assembly 100 is required to be moved or when the table saw assembly 100 is being transported to and from a worksite.
Power to the power tools may be separately controlled for each workstation such that the power control 122 determines the operation of the saw assembly disposed within the first workstation 102 and the power control 124 determines the operation of the saw assembly disposed within the second workstation 108.
The worktable 106 is further disposed with a plurality of slots 162, 164, 166, and 168. In the current embodiment, slot 166 is disposed with a miter gauge 116. Each of the slots may be enabled with miter gauges, sliding panel holders, and the like, to provide enhanced functionality to the worktable 106. The location, number, and dimensional characteristics of the slots disposed on the worktable may vary as contemplated by one of ordinary skill in the art. It is contemplated that the worktable 106 may be configured with no slots, one slot, or a variety of slots to provide a selection of worktable 106 configurations to meet varying consumer demands.
It is contemplated that various power tools and woodworking aids may be disposed within the first and second workstation 102 and 108 and operationally engaging through the worktable 106. Additionally, the first and second workstation 102 and 108 may include various mounting assemblies in order to mount various power tools within the respective housings 103 and 109.
The worktable 106 is coupled with a fence 118. The fence 118 may be capable of adjustment by sliding the fence along the length of worktable 106. This adjusting capability allows the fence 118 to be used in relation to either the first power tool access assembly 112 or the second power tool access assembly 114. In the alternative, the fence 118 may be confined to a portion of the length of the worktable 106. For example, the fence 118 may be limited in range of movement based on distance to and from the first saw blade 110 of the first work station 102. The fence 118 includes a handle 120 which is in operational connection with a fence locking mechanism that provides the user with the ability to lock and unlock the fence 118 in a particular position through a mechanical connection with the worktable 106. For example, the handle 120 may be actuated in a rotary motion, similar to a hand crank, in which a threaded bolt with an end pad releasably contacts the worktable 106. Alternatively, the locking mechanism may be a compression lock mechanism, spring loaded lock mechanism, friction fit lock mechanism, and the like, which assist a user in easily unlocking and locking the fence 118 in multiple positions along the worktable 106.
The fence 118 may be coupled with various devices which aid in performance of woodworking tasks. For example, a digital readout display which provides a display of distance measurements accomplished by a measuring assembly may be coupled with the fence 118. The measuring assembly may include at least one laser source which emits an incident laser beam. In operation, it is contemplated that the incident laser beam is reflected from the saw blade back to the measuring assembly which processes the information to determine the distance between the saw blade and the near side of the fence. The measuring assembly may be a singular device on top of the fence 118 or may comprise two or more housings disposed with light sources, such as laser sources, light emitting diodes, and the like. The digital readout display may be disposed near the handle 120 of the fence 118, however, the digital readout display may be located in various positions either on the fence 118, the first workstation 102, the second workstation 108, or the worktable 106.
The fence 118 may further include an emergency stop assembly comprising a selector operationally coupled with the power feed to the one or more power tools being employed by the system of the present invention. In a preferred embodiment, the selector is disposed on the fence 118 near the handle 120. The selector may be a variety of configurations, such as a button, switch, and the like. In an alternative embodiment, the emergency stop assembly may be a radio frequency (RF) switch assembly which allows for remote activation. The RF-switch assembly may further include one or more handheld remote assemblies allowing multiple remotes to activate/de-activate the emergency stop assembly. The emergency stop assembly may be designed and wired to only shut off power to the power tool(s) or may include the capability of re-starting the power tool(s) after shut down. The emergency stop assembly, in the preferred embodiment, is operationally coupled with all power tools being employed with the table saw assembly, however, it is contemplated that the emergency stop assembly may be limited in its application. For example, a table saw assembly may be employing a saw and a router. The emergency stop assembly may be operationally coupled with both or with only the saw or only the router. Such a design scheme may be advantageous as it provides a user of the table saw assembly a variety of choices with regards to this particular feature. It is contemplated that the emergency stop assembly may be located in various places and should not be viewed as limited to the fence 118. For instance, the emergency stop assembly may be disposed on the first or second workstation 102 or 108 or the worktable 106.
In the preferred embodiment, the first workstation 102 is coupled with a mobile transportation assembly comprising a first base 140 and a plurality of wheels as exemplified by a first wheel 144 and a second wheel 146. The second workstation 108 is also coupled with a mobile transportation assembly comprising a second base 142 and a plurality of wheels as exemplified by a third wheel 150 and a fourth wheel 148. It is understood that the plurality of wheels may be a variety of devices, such as casters, rollers, and the like. The wheels may be lockable to limit movement of the workstations to two directions or may be lockable to completely prevent movement of the workstations. Further, the first and second base 140 and 142 may be shaped in a variety of configurations to match the design of the first and second workstation 102 and 108. Alternatively, the first and second workstation 102 and 108 may be enabled with pads coupled with the first and second base 140 and 142. The pads may provide greater stability and may include adjustment capabilities to selectively raise or lower portions of the workstations to maintain an even or otherwise desired surface for the worktable 106. Other configurations, such as employing skids, posts, and the like, may be employed without departing from the scope and spirit of the present invention.
The table saw assembly includes power tool positioning mechanisms. Illustrations of the positioning mechanisms are provided in
The first workstation 102 includes a combination bevel and height adjustment assembly 300, shown in
It is further contemplated that the router station 412 may be located in the worktable 410 directly over the first or second workstation 402 or 406. In such an embodiment, the housing of the workstations may further include a router mounting assembly. A depth adjustment assembly may be operationally associated with the router station 412 in any of the above described locations for the router station 412. It is understood that the configuration of the router station 412 may be varied to accommodate a variety of router types without departing from the scope and spirit of the present invention.
Referring generally now to
The storage compartment 550 may couple with the dual workstations through a mounting assembly. The mounting assembly may include a first mounting bracket disposed on the first workstation 502 and a second mounting bracket disposed on the second workstation 506. First and second mounting members may be disposed on the storage compartment 550 and engage with the first and second mounting brackets, respectively. Other coupling assemblies may be employed as contemplated by one of ordinary skill in the art. Alternatively, the storage compartment 550 may be integrally formed into the table saw assembly 550, becoming incapable of removal.
It is contemplated that the configuration of the table saw assembly 500 may be varied in order to accommodate a variety of storage compartment sizes. For example, the first and second workstation 502 and 506 may be spaced further apart from one another or closer together depending on the desired specification provided. In this manner, the storage compartment may be sized to fit whatever specifications are desired. It is understood that the spacing of the first and second workstations and the sizing of the storage compartment do not require an adjustment of the size of the worktable 510. It is contemplated that the configuration of the worktable 510, such as the location of slots and power tool access assemblies, may be varied to accommodate any changes made.
An exemplary circuit 700 with a power cutoff switch 710 is shown in
Other variations of the present invention may be practiced. For instance, a ruler scale may be included in any of the above described embodiments. The ruler scale may provide an indicator for the user of the table saw assembly, identifying the beveled angle of the saw blade or a height of the saw blade. Further, a removable dust bin may be connected with either or both workstations. The workstation(s) described in
A method for performing woodworking operations using the table saw assembly 100, is shown in
In the exemplary method discussed above, the table saw assembly 100 provides improved performance of a woodworking operation upon a work piece. Time may be saved by requiring the user to only make a single adjustment to perform an angled cut. Further, time may be saved by establishing saw blades with desired kerf characteristics in each workstation thereby eliminating the need to replace blades between each cut. Precision and accuracy in the cut may be enhanced due to the ability to maintain the blades in their respective positions and not requiring a re-alignment of blade position between each cut. Additionally, wear on a saw blade may be reduced by not requiring a single blade to perform multiple cut tasks in multiple positions.
A method for manufacturing a table saw assembly 100 is shown in
In an additional step of the present invention, the worktable is constructed to include an additional power tool access assembly. For example, the worktable may include a router station which enables the connection and use of a router with the worktable, such as that previously described in reference to
It is understood that the specific order or hierarchy of steps in the methods disclosed are examples of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the method can be rearranged while remaining within the scope and spirit of the present invention. Further, the methods allow for the addition of any of the features and components previously described throughout the instant application. The accompanying method claims present elements of the various steps in a sample order, and are not necessarily meant to be limited to the specific order or hierarchy presented.
It is believed that the present invention and many of its attendant advantages will be understood by the forgoing description. It is also believed that it will be apparent that various changes may be made in the form, construction and arrangement of the components thereof without departing from the scope and spirit of the invention or without sacrificing all of its material advantages, the form hereinbefore described being merely an explanatory embodiment thereof. It is the intention of the following claims to encompass and include such changes.
The present application claims priority under 35 U.S.C. § 119(e) to the U.S. Provisional Application Ser. No. 60/491,790, filed on Jul. 31, 2003, which is herein incorporated by reference in its entirety.
Number | Date | Country | |
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60491790 | Jul 2003 | US |