Abrading – Attachment
Reexamination Certificate
1998-09-25
2001-02-06
Eley, Timothy V. (Department: 3723)
Abrading
Attachment
C451S418000, C451S438000, C451S490000, C451S518000
Reexamination Certificate
active
06183355
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a portable power operated surface preparation device and more particularly to an adapter having a surface treating disk attached to one end and a power unit attached to the other end.
2. Description of Related Art
Power tools for sanding, grinding or buffing are well-known in the art. When a sanding pad is attached to a disk of power sander or grinder, there is a tendency for the tool to walk away from the operator requiring extra effort by the operator to keep the tool touching a particular area until the operator decides to move the tool to another area. This results in the operator tiring quicker compared to an operator only providing force to guide the power tool from one area to another.
In U.S. Pat. 1,653,108 issued Dec. 20, 1927 to Otto A. Koenig a power operated surface machine is described which is hand manipulated and by which the surfacing is accomplished with a rotary motion or a rotary motion plus a reciprocatory motion hand applied. The machine comprises a housing which is cup-shaped opened at the lower end. A shaft runs through the center of the cup and has a hollow lower end for housing a central cushion spring. A flange abutment plate is secured under the shaft section and a larger cushion spring encircling the shaft. The central spring serves to exert downward pressure at the center of a flexible disk attached to the bottom of the shaft and the cushion spring exerts pressure on the peripheral portions of the flexible disk. These two springs provide surface conforming contact of the disk with the surface being worked on. However, the disk is rotated at only 1800 RPM.
In U.S. Pat. 1,643,882 issued Sep. 27, 1927 to M. A. Faireo, a meat block cleaver is described comprising an electric motor in a housing with a lower member and cleaning brush attached to the housing by compression springs which encircle
4
bolts equally spaced and extend through a circular plate. An operator moves the device across the surface of the meat block to be scraped and cleaned. Typically two hands are required by the operator to control this power tool.
In U.S. Pat. 1,681,648 issued Aug. 21, 1928 to Chandler S. Root a rubbing machine is described for polishing automobile bodies and woodwork of various kinds. The machine comprises upper and under casings and a plurality of helical springs disposed between the casing.
SUMMARY OF THE INVENTION
Accordingly, it is therefore an object of this invention to provide an adapter for attachment to one of a plurality of power units for performing sanding, grinding or buffing.
It is another object of this invention to provide a disk on one end of an adapter for attaching a means for sanding, grinding or buffing, the adapter being attached to a power unit and hand operated with minimum force required only to guide the power unit from one area to another area and not to exert force to keep the disk touching the work area.
It is another object of this invention to provide an adapter for use on a motorized carriage apparatus for sanding, grinding or buffing floors.
These and other objects are accomplished by providing an adapter for operation with a power unit comprising a first cap including means for fastening the first cap to the power unit, a second cap including means for fastening the second cap to a disk, spring means having a first end attached to the first cap and a second end attached to the second cap for transferring rotary motion from the power unit to the disk. The first cap comprises a threaded wing nut for receiving a threaded shaft of the power unit. The second cap comprises a threaded wing nut for receiving a threaded shaft of the disk. The spring means a single spring or may comprise a plurality of springs. The first cap and the second cap comprise plastic material. The power unit comprises an electric motor or the adapter may be driven by pneumatic means for rotating the disk. The disk includes means for sanding, grinding or buffing a surface.
The objects are further accomplished by a method of providing an adapter for operation with a power unit comprising the steps of providing a first cap including means for fastening the first cap to the power unit, providing a second cap including means for fastening the second cap to a disk, attaching a first end of a spring means to the first cap and a second end of the spring means to a second cap for transferring rotary motion from the power unit to the disk. The step of fastening a second cap of the adapter to a disk comprises the step of providing, on a lower surface of the disk, means for sanding a surface area. The step of fastening a second cap of the adapter to a disk comprises the step of providing, on a lower surface of the disk, means for grinding a surface area. The step of fastening a second cap of the adapter to a disk comprises the step of providing on a lower surface of the disk, means for buffing a surface area.
The objects are further accomplished by the combination of means for producing rotary motion, an adapter for connecting the rotary motion producing means to an applicator, the adapter comprises a first cap including means for fastening the first cap to the rotary motion producing means, a second cap including means for fastening the second cap to the applicator, and spring means having a first end attached to the first cap and a second end attached to the second cap for transferring rotary motion from the rotary motion producing means to the applicator. The rotary motion producing means comprises an electric motor or a pneumatic means. The spring means comprises a single spring, or an alternate embodiment the spring means comprises a plurality of springs attached between the first cap and the second cap approximately equal distance from each other.
Additional objects, features and advantages of the invention will become apparent to those skilled in the art upon consideration of the following detailed description of the preferred embodiments exemplifying the best mode of carrying out the invention as presently perceived.
REFERENCES:
patent: 487198 (1892-11-01), McCutchan
patent: 1643882 (1927-09-01), Faiver
patent: 1653108 (1927-12-01), Koenig
patent: 1681648 (1928-08-01), Root
patent: 2755606 (1956-07-01), Ronvold et al.
patent: 2854829 (1958-10-01), Porter
patent: 2922261 (1960-01-01), Rabkin et al.
patent: 2977807 (1961-04-01), Conover
patent: 3229428 (1966-01-01), Sargolini
patent: 3364625 (1968-01-01), Sogge
patent: 3874125 (1975-04-01), Stroezel
patent: 3900974 (1975-08-01), Klebe, Jr. et al.
patent: 3928947 (1975-12-01), Millett
patent: 3943669 (1976-03-01), Strozel
patent: 4302910 (1981-12-01), Tschacher
patent: 5403231 (1995-04-01), Duckworth
Berry Jr. Willie
Eley Timothy V.
Pearson & Pearson LLP
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