The present invention relates to power tools. More particularly, the invention relates to a multi-function power saw that performs the functions of a conventional miter saw and a conventional table saw. The invention allows a user to make cross cuts, bevel cuts, miter cuts, compound cuts, and rip cuts in target objects and does so in a single device of an efficient novel design.
In the construction and consumer home renovation industries, it is often necessary to cut wood and other materials. Sometimes it is necessary to shorten a long piece of wood by cutting it across its shorter dimension, known as chopping or cross cutting. A miter saw, including a simple miter saw, a compound miter saw, or a sliding compound miter saw, may be used to perform efficient cross cuts. These cuts may be simple cuts, beveled cuts, miter cuts, or compound miter cuts.
In miter saw operation, a motorized circular blade is pressed downward, via a pivoting arm assembly, onto a stationary piece of wood or target object which is placed on a table to cut the object. The blade is perpendicular to the length of the object to be cut. The size of the cut is limited by the diameter of the circular blade which is sufficient to cut across the shorter dimension of the object. The object, typically a piece of wood, is held stationary either by hand or some other mechanism against a back fence which serves to secure the object. When the circular blade of a miter saw is pressed downward on an object, the cutting edge of the circular blade passes minimally through a slot in the table on which the object rests. This allows the circular blade to completely cut through the width of the object. However, the blade is prevented from going any further.
Sometimes, it is necessary to cut a piece of wood or other object along the long dimension of the object, so as to reduce its width. This type of cut is typically known as a rip cut, or ripping. When one needs to cut along the long dimension of the object, which may be several feet, the miter saw cannot be used as the circular blade diameter is typically only several inches and the blade is fixed or able to move to a very limited degree. Additionally, the back fence and pivoting arm assembly prevent the target object from being pushed along the cutting direction of the blade. Instead, in this case, a table saw is used in which a circular powered rotating blade is projected upward through a slot in table—a large flat surface. The target object to be cut is then pushed over the table across the cutting blade. A side fence may be used to align the object to be cut along a straight path.
Thus, in the miter saw, the object to be cut is stationary and the cutting blade is pressed downward on it, typically cutting across its shorter dimension to create a simple cross cut, beveled cut, miter cut, or compound miter cut. In the table saw, however, the blade is stationary and the object is passed over it, so as to make long cuts along the length of an object.
The two types of cuts described are fundamental to many construction applications and therefore, both types of saws must be available. There are instances when a project will require both a miter saw as well as a table saw in order to perform all types of these cuts to the wood or other material. As an example, consider the installation of flooring planks—hardwood, laminate, etc. These planks are often 7″ wide by 48″ long or 9″ by 60″, among other specifications. During installation, these planks need to be shortened via cross cuts or decreased in width by rip cuts. However, having both a miter saw as well as a table saw available is expensive and logistically difficult.
There are dual function saws available on the market that perform the functions of both a miter saw and a table saw. The designs for such combination saws, however, are large and difficult to use. In these devices, the table necessary for rip cuts is placed atop the blade mechanism of the miter saw thereby creating a large, heavy apparatus which must be moved each time a cross cut is made.
Accordingly, there is a continuing need for a single device that can efficiently perform the functions of both a miter saw as well as a table saw in a small form factor that can be easily stored and transported from one job location to another, as needed. The present invention fulfills these needs and provides other related advantages.
It is an objective of the present invention to provide a novel dual function saw to substantially perform the functions of a conventional miter saw for performing cross cuts and a conventional table saw for performing rip cuts.
It is yet another objective of the present invention to provide the dual function saw comprising an upper table and a lower table, wherein the upper table is used to perform a cross cut operation and the lower table is used to perform rip cut operation.
It is yet another objective of the present invention to provide the dual function saw, wherein the existing space underneath the table of a conventional miter saw is utilized to create a lower table on which an object to be cut can be passed to make a long rip cut.
It is yet another objective of the present invention to provide the dual function saw with a motorized blade assembly and a base assembly, wherein the motorized blade assembly is pivotally connected with the base assembly via a pivot connection and/or pivot arms.
It is yet another objective of the present invention to provide the dual function saw with a circular blade, wherein the circular blade can be pivotally moved upward and downward.
It is yet another objective of the present invention to provide the dual function saw with a circular blade, wherein the circular blade can be pivotally moved from an initial position towards the upper table using a first blade movement.
It is yet another objective of the present invention to provide the dual function saw with a circular blade, wherein the circular blade can be pivotally moved from the initial position towards the lower table using a second blade movement.
It is yet another objective of the present invention to provide the dual function saw with a circular blade, wherein the circular blade is allowed to pivotally move towards the upper table using the first blade movement and further pivotal movement of the circular blade is restricted.
It is yet an another objective of the present invention to provide the dual function saw with a circular blade, wherein the circular blade is allowed to pivotally move towards the lower table using the second blade movement until the blade edge sits in the kerf channel and further pivotal movement of the circular blade is restricted.
It is yet another objective of the present invention to provide the dual function saw with the circular blade, wherein the circular blade is secured in a clearance of a kerf channel in a fixed position to operate as rotatably fixed circular blade for performing the rip cut operation.
In accordance with these, and other objectives, the present invention is generally related to a combination miter and table saw in the form of a single device that can efficiently perform the functions of both a miter saw as well as a table saw in a small form factor. The combination or dual-function saw generally comprises a base assembly. A miter table is connected to or formed integrally with a base assembly. A slot is formed through the miter table. A table saw table is disposed below the miter table, in spaced relation to the miter table. A blade assembly, including a motorized cutting blade is movable between a position above the miter table, to a position at the miter table slot, and to a position through the miter table slot and to the table saw table.
The blade assembly may include a handle and an electric motor for rotating the cutting blade. The cutting blade cuts material placed on the miter table as the blade assembly is moved to the position at the miter table. The cutting blade cuts material placed on the table saw table when the cutting blade is moved through the miter table slot and at the table saw, and as material is urged to the cutting blade. Typically, the blade assembly is selectively locked into the position where the cutting blade is at the table saw table.
A pivot mechanism may be coupled to the blade assembly for selectively moving the blade assembly between the positions above the miter table, at the miter table, and/or the table saw table. A pivot arm may extend between the blade assembly and the pivot mechanism. The pivot mechanism may be attached to the miter table or the base assembly. The miter table may be rotatable with respect to the base assembly. The cutting blade may be pivotable with respect to a front-back vertical axis so as to create bevel cuts in material placed on the miter table or the table saw table.
The table saw table may be detachably connected to the base assembly. An adjustable material guide may be connected to the table saw table.
The distance between the miter table and the table saw table may be selectively variable and adjustable to accommodate material of varying thicknesses.
A width of the base assembly may accommodate material of different sizes on the table saw table.
Other features and advantages of the present invention will become apparent from the following more detailed description, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the invention.
The accompanying drawings illustrate the invention. In such drawings:
As shown in the accompanying drawings, for purposes of illustration, the present invention relates to a power cutting tool, more particularly, a combination miter and table saw, generally referred to by the reference number 10. The combination saw 10 is designed and configured so as to perform miter cuts, such as cross cuts, bevel cuts, and combination cuts, as in a traditional miter saw, as well as rip cuts like those made by a traditional table saw. The present invention eliminates the need to use, transfer and store two different power tools to perform these types of cuts, while presenting a single device 10 which is approximately the size of a traditional miter saw and which can be easily manually transported to a jobsite and which performs all of the aforementioned cuts, which otherwise would require both a miter saw as well as a table saw.
The combination miter and table saw 10, as illustrated in
A miter table 18 is connected to, or may be formed integrally, with the base assembly 12. Preferably, the miter table 18 is rotatably connected to the base assembly 12 so that cross cuts of different angles may be formed in the material placed upon the miter table 18. A slot 20 is formed through the upper miter table 18 to allow a cutting blade to extend therein and thus completely pass through an object to be cut during the cutting operation. The miter table 18 may also include a miter scale 22 used when rotating the miter table 18 to assist in making angled cuts in a precise manner.
A fence assembly 24 is associated with or connected to the base assembly 12 which includes a first or left fence 26 and a second or right fence 28 which are used to secure an object to be cut during miter cuts. The left and right fences 26 and 28, or the fence assembly 24, may be adjustable, such as riding within tracks 30 and 32, so that the fences 26 and/or 28 may be slid and extended or retracted as desired. A locking mechanism, such as the illustrated thumb lever 34 can be used to selectively lock the fence assembly 24 in place within tracks 30 and 32. In this manner, an object may be supported or stabilized in a desired position on the miter table 18. However, the fences 26 and 28 may not be adjustable, but rather just the miter table 18 rotatable and lockable into place.
In accordance with the present invention, a second lower table, comprising a table saw table 36 is disposed below the miter saw table 18 in spaced relation thereto. The table saw table 36 may be integrally formed with the base assembly 12, operably connected to the base assembly 12, or even detachably connected to the base assembly 12, as will be more fully described herein. The upper miter table 18 and the lower table saw table 36 lie generally parallel to one another and are sufficiently spaced apart from one another that objects to be cut via a rip cut can pass therebetween. The invention contemplates, as will be more fully discussed herein, adjusting the space between the upper and lower tables 18 and 36.
A blade assembly 38, including a motorized cutting blade 40, is movable between an at-rest position above the miter table 18, as illustrated in
The blade assembly 38 may be operably connected to the base assembly 12, but more typically is connected to the miter table 18 so that it can be rotated clockwise or counterclockwise within the base assembly 12. Miter table 18 is rotatable, along with attached blade assembly 38, within base assembly 12 to perform miter cuts at various angles. As illustrated in
The blade assembly 38 generally comprises an electric motor 42 operably connected to the cutting blade 40. The motor 42 is typically encased within a housing 44. A handle 46, which may be connected to the motor assembly 42, enables a user to pivotally move the motorized blade assembly 38 upwardly and downwardly, and to carry the combination saw 10 from one place to another.
Typically, as illustrated, the blade assembly 38 is pivotally connected to the base assembly 12 or miter table 18. This allows the selective upward and downward movement of the motorized blade assembly 38, and cutting blade 40. This may be accomplished, for example, by means of a pivot or rotation mechanism 48 which is coupled to the base assembly or miter table 18 and which is coupled to the blade assembly 38 by one or more pivot arms 50. The pivot connection 52 between pivot arm 50 and pivot or rotating mechanism 48 enables the blade assembly 38, and thus the cutting blade 40 to be selectively pivoted or raised and lowered between its uppermost position to its lowermost position at the table saw table 36.
The blade assembly 38, and thus the motorized cutting blade 40 is movable from an initial position above the miter table 18, as illustrated in
As illustrated in the figures, the blade assembly 38 may include a retractable safety blade guard 56 which covers the cutting blade 40, but which is retractable, as illustrated in
The blade assembly 38, and cutting blade 40, may be further moved in a first movement from its first, at-rest position, as illustrated in
However, in the present invention, the hinge or pivot mechanism 48 connecting the pivot arm 50 to the base assembly 12 is configured and designed so that the cutting blade 40 can be passed through the miter table slot 20 so that a substantial portion of the circular cutting blade 40 is below the miter table 18 and positioned at the table saw table 36. Preferably, the table saw table 36 includes an open-faced channel or kerf slot 58 formed therein and generally aligned with the miter table slot 20 such that the cutting blade 40 can extend partially therein so that the object 2 may be cut completely. It will be understood that the kerf channel 58 provides clearance for the edge of the cutting blade 40 to spin in a fixed rotatable position for performing the rip cut operation.
The circular cutting blade 40 is preferably locked securely in the position at the table saw table 36 to enable the user to use both hands in holding and urging the material or object 2 to be cut into the rotating cutting blade 40, similar to how a user would utilize both hands when utilizing a traditional table saw. With the circular cutting blade 40 secured into position to operate as rotatably fixed for performing the rip cut operation, the user need not hold down the cutting blade assembly 30, but instead can utilize both hands to perform the rip cut or other cut on the piece of material or object placed on the table saw table 36. The upward and downward movement of the blade assembly 38 and cutting blade 40 are restricted by use of a locking system so that the cutting blade 40 is secured in rotatably fixed position at the table saw table 36, so as to extend somewhat into the kerf channel 58. Any locking means can be utilized to rotatably secure the blade assembly 38, and the cutting blade 40, in the fixed position for performing the rip cut.
With reference now to
With continuing reference to
To prevent the cutting blade 40 from being lowered excessively, such as into contact with the table saw table 36, a stop mechanism may be used to limit the downward travel of the blade assembly 38. With continuing reference to
With reference again to
With reference now to
With continuing reference to
With reference now to
As shown in
The table saw table 36 is preferably as wide, or has the greatest dimension, as possible, so as to accommodate pieces of wood or other objects of varying diameter and sizes. The width of the base assembly 12 may accommodate material of different sizes on the table saw table 36. To increase the allowable object width, clearance channels 76 may be created in the base assembly 12, such as in the base feet 14 and 16, as illustrated. The inside edges, from front to back, as illustrated in
It may be desirable to cut thicker objects than the default positioning of the lower table saw table 36 with respect to the upper miter table 18 allows. This would require a greater space in between these tables 18 and 36. However, it also may be desirable to have a more compact device when working with thin objects, such as flooring panels or the like. The present invention allows the distance between the miter table 18 and the table saw table 36 to be selectively variable. This can be accomplished, for example, by enabling the lower table saw table 36 to be detachably connected to the base assembly 12 in such a manner so as to increase or decrease the space or clearance between the miter table 18 and the table saw table 36. It is contemplated by the present invention that the table saw table 36 could be detachably connected to the base assembly 12 in a number of ways to accomplish this variable clearance.
With reference to
To increase the distance between the upper miter table 18 and the lower table saw table 36, using the mechanisms illustrated in
Although several embodiments have been described in detail for purposes of illustration, various modifications may be made without departing from the scope and spirit of the invention. Accordingly, the invention is not to be limited, except as by the appended claims.
This application claims the benefit of U.S. Provisional Application No. 62/847,251, filed on May 13, 2019.
Number | Date | Country | |
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62847251 | May 2019 | US |