1. Field of the Invention
Embodiments of the present invention generally relate to a hand tool and more particularly to a vise. More particularly still, embodiments of the invention relate to a table top mounted vise with improved performance and utility.
2. Description of the Related Art
Vises are used in order to temporarily hold one or more objects so that work can be performed on them. Traditional table top mounted vises have existed for years. A typical vise is composed of a stationary jaw with a base that can be mounted to a surface. There is a moveable jaw and a guide rod(s) that allows the moveable jaw to move smoothly toward and away from the stationary jaw. Each jaw has a clamping surface for holding a work piece. Further, the vise has a screw and lever system which operates the moveable jaw. The screw typically has a relatively fine pitched thread which provides a large mechanical advantage such that a relatively small amount of torque applied to the lever produces a large clamping force between the jaws. The screw moves the moveable jaw whereby the fine pitch required for the large mechanical advantage causes the jaw to move a very small distance with each turn. Thus, adjusting the jaws to different opening sizes for clamping of relatively thin and subsequently relatively thick items (or vice versa) requires numerous turns of the lever attached to the screw. Large adjustments to these vises require several rotations of the screw and thus long periods of time.
Therefore, a need exists for an improved apparatus and method of vise clamping that would allow a user to quickly adjust the opening size of the jaws and apply clamping force to the jaw through the use of one lever.
The present invention generally relates to a method and apparatus for clamping a work piece.
So that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.
The moveable jaw 10 attaches to the channel 60. As shown, the moveable jaw 10 is fixed to the channel 60. Thus as the channel 60 moves, the moveable jaw 10 moves with it. The channel 60 is configured to move through an aperture 65 in a housing 68 coupled to the fixed jaw 20. Therefore, as the spindle 30 or the operator moves the channel 60 into and out of the aperture 65 the moveable jaw 10 moves toward and away from the fixed jaw 20.
The housing 68 couples to the fixed jaw 20 and the base 70. The base 70 is configured to couple the vise 1 to a surface such as a table. The base 70, as shown, has holes 80 adapted to couple the vise 1 to the surface with fasteners. The fasteners may be any suitable fastener including, but not limited to, screws, nails, or bolts. With the base 70 fastened to the surface, the housing 68 and the fixed jaw 20 remain stationary. The moveable jaw 10 and the channel 60 may be manipulated using the handle 40 and the lever 50 in order to quickly engage and disengage a workpiece between the jaws.
As shown in
The spindle 30 has one or more threads 430 configured to engage an engagement profile 440 on a semi-nut 450. The one or more threads 430 as shown have a fine pitch that allows the moveable jaw 10 to move a very small distance when the spindle is rotated, although it should be appreciated that any suitable thread pitch may be used depending on the mechanical advantage sought for the vise 1. The handle 40 is adapted to allow the operator to easily rotate the spindle 30 in either direction. As the spindle 30 rotates, the threads 430 travel in the engagement profile 440 when the semi-nut 450 is engaged with the spindle 30. The semi-nut 450 is coupled to the fixed jaw 20 thereby moving the spindle 30 and the moveable jaw 10 as the threads 430 travel in the engagement profile 440. The rotation of the spindle 30 in the first direction moves the moveable jaw 10 toward the fixed jaw 20. The rotation of the spindle 30 in the second or opposite direction moves the moveable jaw 10 away from the fixed jaw 20.
The semi-nut 450 is moveably located within a semi-nut housing 460. The semi-nut housing 460, as shown, is coupled to the housing 68 of the fixed jaw 20. Any suitable method of connecting the semi-nut housing 460 to the fixed jaw 20 is contemplated including, but not limited to, welding, screwing, bolting, or gluing. The semi-nut housing 460 may include two apertures 462 and 464 configured to allow the spindle 30 and the actuation rod 420 to go though the semi-nut housing 460. The apertures 462 and 464 allow the spindle 30 and/or the actuation rod 420 to rotate and move longitudinally relative to the semi-nut housing 460 as the spindle 30 and actuation rod 420 are operated. The semi-nut 450 is adapted to move radially toward and away from the spindle 30, or up and down as shown in
The actuation rod 420 moves the semi-nut 450 into and out of engagement with the spindle 30. The actuation rod 420 couples to the lever 50. The lever 50 may be rotated in order to rotate the actuation rod 420 thereby actuating the semi-nut 450. The actuation rod 420 has a cross section (illustrated in
An optional biasing member 480 is configured to bias the semi-nut 450 toward a disengaged position. The biasing member 480 assists in the disengagement of the semi-nut 450 from the spindle 30. In operation, the jaws 10 and 20 may exert a considerable force on the workpiece. A portion of this force will be applied between the threads 430 of the spindle 30 and the engagement profile 440 of the semi-nut 450. This force may require a force larger than a gravity force in order to disengage the semi-nut 450 from the spindle 30. Therefore, the biasing member 480 assists in the disengagement of the semi-nut 450 from the spindle 30 when the actuation rod 420 is moved to the disengagement position. Any suitable number and orientation of biasing members 480 may be used. As shown, the biasing member 480 is a coiled spring surrounding a telescopic rod; however, it should be appreciated that any suitable biasing member may be used. When the vise 1 is placed upright on a horizontal surface, the biasing member 480 is assisted by gravity to disengage the semi-nut 450 from the spindle 30. The biasing member 480 may be configured to work in the absence of the assistance of gravity, for example when the vise 1 is mounted on a vertical surface or upside-down.
When the operator desires to release the moveable jaw 10 from the fixed jaw 20, the operator rotates the lever 50 until the flat portion 472 of the actuation rod 420 is engaged with the semi-nut 450 as shown in
In one embodiment, the lever 50 and/or the actuation rod 420 includes a spring or biasing member (not shown) configured to bias the actuation rod 420 toward the engaged position. Thus, the spring will bias the actuation rod 420 toward a position wherein the circular portion 470 engages the semi-nut 450. The spring prevents the inadvertent release of the semi-nut 450 from the spindle 30. The spring may be coupled to the moveable jaw 10 and may include an end that wraps around the lever 50 to thereby provide the bias that returns the actuating rod 420 to the engaged position after being manually rotated to the disengaged position.
In an additional or alternative embodiment, the vise 1 includes a measurement indicator as shown in
In operation, the vise is used to engage and disengage a workpiece quickly. The operator manipulates the lever 50 in order to disengage the moveable jaw 10 from the fixed jaw 20. The manipulation of the lever 50 rotates the actuation rod 420 until the flat portion 472 of the actuation rod is substantially facing the semi-nut 450. The semi-nut 450 moves away from the spindle 30 with the assistance of gravity and/or the biasing member 480. The engagement profile 440 disengages the threads 430 of the spindle 30 as the semi-nut moves down. With the threads 430 disengaged, the operator may adjust the moveable jaw 10 to a location close to the workpiece. Thus, the workpiece is now in close proximity with the fixed jaw 20 and the disengaged moveable jaw 10. The lever 50 may now be returned to the engaged position thereby rotating the actuation rod 420 until the semi-nut 450 is engaged with the spindle 30. The operator may now rotate the spindle 30 in the first direction in order to move the moveable jaw 10 towards the fixed jaw 20. This may be done until the workpiece is held between the jaws 10 and 20 with the desired force. In this position an operation may be performed on the workpiece. In order to release the workpiece, the operator manipulates the lever 50 until the flat portion of the actuation rod 420 is facing the semi-nut 450. Gravity and/or the biasing member assist in disengaging the semi-nut from the spindle as described above. With the semi-nut 450 disengaged from spindle 30, the operator may move the moveable jaw 10 away from the fixed jaw 20. The workpiece is no longer engaged between the jaws and the operator may repeat this process to perform another operation on another workpiece.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
This application claims benefit of U.S. Provisional Patent Application Ser. No. 60/821,110, filed Aug. 1, 2006, and U.S. Ser. No. 29/248,180, filed Aug. 1, 2006. These application are incorporated herein in their entirety.
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Number | Date | Country | |
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20080029947 A1 | Feb 2008 | US |
Number | Date | Country | |
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60821110 | Aug 2006 | US |