CA1072269A

CA1072269A - Surface preparation machine

Info

Publication number: CA1072269A
Application number: CA282,458A
Authority: CA
Inventors: Leland Z. Taylor
Original assignee: Individual
Current assignee: Individual
Priority date: 1977-07-11
Filing date: 1977-07-11
Publication date: 1980-02-26

Abstract

ABSTRACT
This device consists primarily of a tool (blade, chisel, or sanding attachment) which is attached to a tool holder. The tool holder in turn is attached by a bearing to a shaft which passes thru a flywheel, the shaft is offset from the center of the flywheel thereby causing an eccentric rotation of the tool holder. The flywheel and tool holder "float" as an assembly on rubber couplings and impart to the tool com-ponents of these various motions slicing, chopping, scraping, and rubbing.

Description

- SURFACE PREPARATION MACHINE
This machine is a simple powered means to remove such substances as carpet, tile, roofing, ice or other substances which have been adhered or otherwise applied to floors, sidewalks, drives, roofs or other surfaces.
The above-mentioned substances have been classically removed with shovels, hoes, forks or other sharp bladed instruments.
The available machines suffered from these disadvantages:
1. Because the blade was moved by direct means such as a powered crankshaft, action-reaction caused the machines to vibrate violently.

2. To keep the machine from vibrating violently, weight had to be 10 added to increase the machine's inertia making such machines unnecessarily heavy and cumbersome.
My invention is a surface preparation machine for removing material adhered to a planar surface. It has a wheeled frame having an upper portion and a lower portion. A motor is mounted on the upper portion of the frame.
Attached at one end of said motor and extending clownwardly therefrom is a vertical shaft. The shaft has an annular shaped flywheel attached thereto, the shaft being offset from the center of the flywheel and extending there-through. A horizontal base plate is attached to the lower portion of the ~rame, and the base plate has an aperture therein for receiving the shaft 20 therethrough. A horizontal tool holding plate is disposed below the base plate and parallel thereto. The other end of the shaft is attached to the tool holding plate. A tool is mounted on the tool holding plate for in operation removing material adhered to a planar surface. The machine -has coupling means for attaching the tool holding plate to the base plate and suspending same therefrom. In operation the mo~or rotates the fly-wheel and the shaft, and the shaft provides an eccen~-ric motion in providing an orbital movement of the tool holding plate in a horizontal plane.
The drawing Figure 1 shows a complete machine mounted on a wheeled frame set up with blade for removal of soft materials such as carpet or foam 30 padding. Other materials such as tile, ice, linoleum or vinyl can be removed E~ ~
'``
:

.. . .. . . . .

~72Z~;~
., with a narrower blade, increasing the cutting force. Paint, varnish or other substances are removed efficiently with a sanding attachment placed where the blade normally is.
The drawing ~igure 2 shows the internal view of the machine with the floating flywheel and tool holding assembly.
The drawing Figure 3 shows an arrangement used to allow the tool holder-flywheel assembly to float or move with respect to the machine.
Figure 1:
C. Tool ~blade) attached to a tool holding plate W. Wheels mounted on the bottom of a frame D. Motor (electric, could be internal combustion) attached to the frame.
F. Cord and switch wired to the motor G. Telescoping handle attached to the frame.
~igure 2:
C. Tool (blade) attached to the tool holding plate E. Pillow block bearing attached to the top of the holding plate ;` ~. Flywheel with a shaft of~set from the center of the flywheel D. Motor attached to the frame H. Flexible coupling arrangement between motor D. and flywheel A.
M. Base pla~e of machine attached to the frame L. Tool holding plate attached to the base plate by a flexible vibration dampener Figure 3:
S. Bolt with nut 0. Was hers Base plate of machine attached to the frame L. Tool holding plate of machine attached to the base plate by a ~lexible vibration dampener X, Spacer bushing ,~t.,4 -3 -': . '.' ' ' ;.,' ~ : . ' , ' .' .. : , . . . . . . . .

~22g;9 K. 1-4 rubber gromets In order to eliminate the circular motion generated by the tool holding plate L. and flywheel A. from being transmitted to the rest of said machine, a flexible vibra~ion dampener, shown in Figure 3, is used to attach the base plate M. of said machine to the tool holding plate L. of said machine. Notice K. 1-4 are used, allowing flexure or movement between M. and L.
Flexible coupling H. between motor D. and flywheel A. prevents excessive vibration from being transmitted from A. to D.
The above said flexible vibration dampening attachments effectively 10 isolate the circular motions generated by A. and L. from reaching M. and D. Thus~ A. and L. could be said to "float".
The arrangement shown in Figure 3 so effectively keeps the vibra-tion of the flywheel from reaching the rest of the machine that practically no vibration reaches the operator at the handle. The stiffness of this rubber coupling arrangement can be varied by tightening or loosening bolt S.
Besides providing the inertia or "base" from which to move the tool holder L., the flywheel A. also acts as a power storage device as is the character of a flywheel. Because the flywheel does store a considerable amount of power, it is able to keep the blade cutting through obstructions 20 that the motor alone would not have the power to cut through in the conventional design. Thus, a n~achine of this type can use a much smaller motor than a machine of conventional design.
Because the shaft that passes through the flywheel A. is offset from the cen~er of the flywheel, as the flywheel revolves, the shaft moves in an eccentric motion about the center of the flywheel. The reason for this is that thel,flywheel centers itself as it spins gyroscopically. The eccentric motion of the shaft is transmitted to the tool by means of bearing E. and plate L.
It should be understood that the matter hereinbefore shown and 30 described should not be tal~en in a limiting sense. For example, the fly-~ 4 ~ 22~69wheel arrangement shown could be used in a horizontal position and not in a vertical position as shown in the drawing. When used in the horizontal position, the flywheel imparts more of a chopping action to the tool than it does when the axis of the flywheel is vertical.

, .~ , , :~
' :, - , . . . . . . . . . . . ..
-, .. . . . . ..
; . .. , , , . - , : ; . ~ . . ,

Claims

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A surface preparation machine for removing material adhered to a planar surface, the machine comprising:
(a) a wheeled frame having an upper portion and a lower portion;
(b) a motor mounted to the upper portion of said frame;
(c) a vertical shaft attached at one end to said motor and exten-ding downwardly therefrom;
(d) an annular shaped flywheel attached to said shaft, said shaft offset from the center of said flywheel and extending therethrough;
(e) a horizontal base plate attached to the lower portion of said frame, said base plate having an aperture therein for receiving said shaft therethrough;
(f) a horizontal tool holding plate disposed below said base plate and parallel thereto, the other end of said shaft attached to said tool holding plate, said plate having a tool mounted thereon for removing the material; and (g) coupling means for attaching said plate to said base plate and suspending said plate therefrom; said motor rotating said flywheel and said shaft, said shaft providing an eccentric motion in providing an orbi-tal movement of said tool holding plate in a horizontal plane.

2. The machine as described in Claim 1, wherein said coupling means includes a plurality of bolts extending through apertures in said base plate and said tool holding plate, and secured thereto by threaded bolts, said bolts having rubber grommets therearound for absorbing the vibration imported from said tool holding plate to said base plate.

3. The machine as described in Claim 1, wherein said vertical shaft is attached to said tool holding plate by a pillow block bearing, said bearing mounted on top of said tool holding plate and receiving the end of said shaft therein.

4. The machine as described in Claim 1, further including a flexible coupling mounted on said shaft and connecting said shaft to said motor for reducing vibrations between said flywheel and said motor.

5. The machine as described in Claim 1, wherein said flywheel mounted on said shaft is disposed between said base plate and said tool holding plate.