Cutting – By tool reciprocable along elongated edge – With work-support and means to vary relationship between...
Reexamination Certificate
1998-02-06
2001-07-31
Rachuba, M. (Department: 3724)
Cutting
By tool reciprocable along elongated edge
With work-support and means to vary relationship between...
C083S786000, C083S662000
Reexamination Certificate
active
06267038
ABSTRACT:
FIELD OF THE INVENTION
This invention relates generally to scroll saws and, more particularly, to a scroll saw that can be adjusted from fine to coarse (aggressive) cutting.
BACKGROUND OF THE INVENTION
Most scroll saws are typically of two types: parallel arm scroll saws and one-piece C-arm shaped scroll saws. Parallel arm scroll saws include upper and lower horizontally extending arms which pivot in unison about vertically aligned pivot pins. Examples of such saws are shown in U.S. Pat. Nos. 4,616,541, 4,838,138 and 4,841,823.
C-arm shaped scroll saws connect upper and lower arms in a single C-shaped arm structure which pivots about a pivot point located on the bight end portion of the C-shaped arm structure. Examples of such saws are shown in U.S. Pat. Nos. 4,503,742, 4,625,609 and 4,646,605.
All these saws have vertical, or near vertical, cutting blade paths. These allow for fine cutting, as users demand precision in their cutting. However, this limits the use of the scroll saw to only fine work. In turn, sometimes users want faster, albeit coarser, cuts.
It is an object of this invention to provide a scroll saw that allows both fine and coarse cutting of workpieces, thus providing greater flexibility than prior art scroll saws.
SUMMARY OF THE INVENTION
In accordance with the present invention, an improved scroll saw is employed. The scroll saw includes a frame with a worktable for supporting workpieces, first and second blade clamps for clamping a blade therebetween, an oscillating mechanism disposed within the frame, the oscillating mechanism moving the first and second blade clamps in a direction along a substantially vertical axis, wherein the oscillating mechanism comprises a first arm connected to the first blade clamp and a second arm connected to the second blade clamp. The length of the first arm can be changed so that the blade is shifted to a selected angle from the vertical axis. Preferably, the first arm comprises two sections that can be moved relative to each other in order to change the length of the first arm.
Also disclosed is a saw comprising a rear casting, and first and second arms connected to and forwardly extending from the casting. The first and second arms have respective forward ends for holding a blade. The first arm is pivotably attached to the casting and is pivotable between a first position near the blade and a second position away from the blade. The saw further comprises a workpiece support table disposed between the first and second arms, where the table has a hole through which the blade may extend, and a detent mechanism disposed on the arm for maintaining the arm in the second position. The detent mechanism may include a pin disposed on the arm engaging a notch in the casting.
Further disclosed is a saw comprising a frame with a worktable for supporting workpieces, first and second blade clamps for clamping a blade therebetween, an oscillating mechanism disposed within the frame, the oscillating mechanism moving the first and second blade clamps in a direction along a substantially vertical axis, and a dust collector attached to the underside of the table having a main body forming a substantially enclosed chamber and an exhaust duct connected to the main body. Preferably the dust collector is removably attached to the table.
Also disclosed is a fence for a saw including at least one magnetic block and a fence face attached to the magnetic block. Preferably the fence face is slidably attached to the magnetic block. The magnetic block may comprise an electromagnet.
Further disclosed is a blade clamp for holding a saw blade comprising an arm portion connectable to a saw, a clamping portion extending forwardly from the arm portion, the clamping portion comprising a vertical ledge portion having a smaller width than the width of the saw blade, and a locking portion attached to the arm portion.
Also disclosed is a saw comprising a frame, first and second arms connected to and forwardly extending from the frame and having respective forward ends for holding a blade, and a workpiece support table disposed between the first and second arms, where the table has a hole through which the blade may extend, and a removable table disposed on the table for selectively increasing the size of the hole.
Further disclosed is a magnetic blade holder comprising a magnetic main body and at least one storage cavity disposed on the upper side of the main body. The main body may have a magnet disposed underneath the storage cavity.
Also disclosed is a saw comprising a frame with a worktable for supporting workpieces, first and second blade clamps for clamping a first blade therebetween, an oscillating mechanism disposed within the frame, the oscillating mechanism moving the first and second blade clamps in a direction along a substantially vertical axis, a motor connected to the oscillating mechanism, and a blade holder disposed around the motor for magnetically holding a second blade.
Further disclosed is a saw comprising a frame with a worktable for supporting workpieces, first and second blade clamps for clamping a first blade therebetween, an oscillating mechanism disposed within the frame, the oscillating mechanism moving the first and second blade clamps in a direction along a substantially vertical axis, a motor connected to the oscillating mechanism, and first and second potentiometers connected to the motor for controlling the motor speed. Preferably, the first and second potentiometers are connected in parallel to each other.
Additional features and benefits of the present invention are described, and will be apparent from, the accompanying drawings and the detailed description below.
REFERENCES:
patent: 4825741 (1989-05-01), Wellington et al.
patent: 4841823 (1989-06-01), Brundage
patent: 5228376 (1993-07-01), Huang
patent: 5267498 (1993-12-01), Miyamoto et al.
patent: 5303627 (1994-04-01), Shondel
patent: 5351591 (1994-10-01), Miyamoto et al.
patent: 5520081 (1996-05-01), Rice et al.
patent: 5768971 (1998-06-01), O'Bannion et al.
patent: 320113 (1919-04-01), None
patent: 502848 (1930-07-01), None
patent: 0792711 (1997-03-01), None
Bean Frederick R.
Ceroll Warren A.
O'Banion Michael L.
Porter David A.
Shadeck Louis M.
Ayala Adan
Black & Decker Inc.
Rachuba M.
LandOfFree
Variable cut scroll saw does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable cut scroll saw, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable cut scroll saw will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2548114