Grinding wheel assembly

Details Grinding wheel assembly Grinding wheel assembly

2001-04-02

2001-12-25

Banks, Derris H. (Department: 3723)

Abrading

Frame or mount

Portable abrader

C451S540000, C451S548000

Reexamination Certificate

active

06332836

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a grinding wheel assembly wherein a powered shaft has two position members which are connected to two surfaces of the grinding wheel so as to prevent the wheel from being deformed.
BACKGROUND OF THE INVENTION
A conventional grinding wheel assembly is shown in FIG.
1
and generally includes a power mechanism
1
′ and a shaft
12
′ is connected to a lower end of the power mechanism
1
′. A disk
11
′ is connected to the shaft
12
′ so that a grinding wheel
13
′ is connected to the disk
11
′. The disk
11
′ is enclosed by the material of the grinding wheel
13
′ so that the disk
11
′ cannot be seen when the material of the grinding wheel
13
′ is connected to the disk
11
′. The material of the grinding wheel
13
′ is consumable during using so that the size of the grinding wheel
13
′ becomes smaller and smaller. Because the disk
11
′ is made of metal or hard material so that if the disk
11
′ hits the object to be ground, the object will be damaged. Therefore, the user has to replace a new grinding wheel
13
′ when needed. However, because the disk
13
′ is not visible so that the user tends to discard the grinding wheel
13
′ before the disk
11
′ is exposed and this could result in waste. Besides, the diameter of the grinding wheel
13
′ is larger than the diameter of the disk
11
′ and the disk
11
′ is a thin disk which is deeply enclosed by the material so that the grinding wheel
13
′ is easily deformed.
The present invention intends to provide a grinding wheel assembly wherein the grinding wheel is clamped between two position members which is visible.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a grinding wheel assembly and comprises a grinding wheel having a hole defined therein and two recesses are respectively defined in tow surfaces of the grinding wheel. A plurality of protrusions extend inward from a inner periphery of each of the two recesses. A first position member is received in one of the two recesses and has a plurality of first notches which receive the protrusions therein. A tubular section extends from the first position member and a polygonal section is located on the tubular section. A threaded rod extends from the polygonal section and through the hole and the tubular section is engaged with the hole. A second position member is engaged with the other recess and has a plurality of second notches defined therein so as to receive the protrusions in the recess. The second position member has a polygonal hole which is engaged with the polygonal section.
The primary object of the present invention is to provide a grinding wheel assembly wherein the two position members are located on two surfaces of the grinding wheel so that the users can easily decide the timing of discarding the grinding wheel.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.


REFERENCES:
patent: 4924634 (1990-05-01), Mackay, Jr.
patent: 5152106 (1992-10-01), Mackay, Jr.
patent: 5895317 (1999-04-01), Timm
patent: 6116996 (2000-09-01), Yanase
patent: 6264408 (2001-07-01), Lung et al.

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