US1950824A - Dental-instrument grinding device - Google Patents

Description

March 13, 1934. o. SUTER 0,

DENTAL INSTRUMENT GRINDING DEVICE Filed March 7, 1932 INyENTOR 0170 5 M [@J' Patented Mar. 13, 1934 1 UNIT D sTA- rEs rA'rsu'rgoi-rlcli nan'ran-msraumm Gamma navroa om sum, Seattle, Wash.

- Application M1, 193:, No. 597,287 7Claims.(CL51239) I This invention has reference to improvements A 'dental-tool guiding and supporting member,

'in grinding devices of the type particularly suitable for sharpening the fine cutting and excavating instruments used in dentistry.

Its objects, generally stated, are, to provide a device including a vertically extending and rotatable grinding wheel, and a dental tool guide and support by which instruments to beground may be positioned in various ways and held in a positive manner against the cutting edge of said wheel, the, same permitting predetermined and exact cuts to be made, either in or beveling; to afford in a device of this class such a guide and support having a transverse sliding movement relative to said wheel, whereby the cutting operation is facilitated, .and the grinding of pointed instruments may be eflected without injuriously' grooving said wheel; and, to make available a grinding device for dental instrugo ments which is precise in operation and exceed ingly simple in construction.

In the accompanying drawing--- i Figure 1 is a front view illustrating said dentaltool guide and support, and the mountings as for.

Fig. 2 is a front elevation of an electric motor,

a grinding wheel mounted thereto, and the mechanism shown in Fig. 1 operatively associated with said wheel.

so Fig. 3 is a top view of the same, said motor being broken away, and a dental instrument shown as disposed in said dental-tool guide and support for grinding.

Fig. 4 is a cross section drawn on the line 4-4, of Fig. 1, and indicates also said grinding .wheel and a dental tool, each broken away, said tool being disposed in said guide and support and in grinding position against said wheel.

Referring more particularly to the drawing, 1

.m denotes an electric motor, designed to be utilized.

in this device, the same being preferably small in size and provided with abase 2 relatively large in proportions to give the motor stability, said Fixedly secured in the other end of said portion are a pair of rods 12 extending longitudinally and in spaced parallel relation, the same being providedwlth an end piece 13.

notches are more particularly detailed hereinthereis evident, are inserted through the openings 11 generally designated as 14, is slidably mounted on said rods and disposed between said body portion and endpiece. Said member is provided with a pairof spaced legs 7 15 which are apertured to 00 receive the rods 12 and afford for the member a sliding connection therewith. The top portion of the member 14 is provided with a plurality of notches v-shaped in cross section, the central one 16 being a straight notch, and the notches 17 and 66 18, located on each side of the notch 16, being disposed angularly and converging rearwardly of said member. As it may be noted particularly in Fig. 4 the top edges of said notches are cut angularly, as at 19, the same extending downwardly 70 in an inclined plane toward the front of the member 14. The purpose of this last-named con- I struction will appear when the functions of said after. I

The dental-tool guide and support, just described, is secured in operative position relative to the grinding wheel 4 by the screws 20, which, as

and engage complementary and threaded openings formed in the casing of said motor. The parts here referred to, when in place, are designed to occupy about the positions shown in Figs. 2 and 3, the member 14,-and in particular its notched portion, being very close to the grinding edge of said wheel, but not in contact therewith.

This device is particularly designed and adapted to operate on instruments known to the dental profession as chisels, hatchets and hoes, which are straight faced tools, and also on angle formers and gingival margin trimmers, which are angularly faced.

In operating the device, and assuming that power has been applied to the wheel and a straight faced tool is to be sharpened, the tool 30 is placed in the notch 16 and if the edges of the tool adjacent its face are brought into alignment with the top'edges of said notch, the inclination of said edges 19 away from the wheel is such as to bring the'face of the tool against the wheel in a position viously if the face of said toolshould be disposed 1 below the top edgesof said notch but in a plane parallel therewith, the same result will be" obtained. Said notch, 'in addition to its usefulness as a guide for the tool in obtaining a proper bevel,

being V-shaped in cross section, serves to gri and steady the tool as it is held therein by the user and thereby insures a square cut for its face. In sharpening a tool 31 having an angular face, it is placed in one of the side notches, the notch 1'7 being utilized if a right-hand cut is required and the notch18 for a left-hand cut, the device then functioning and the tool being sharpened in the same manner as described heretofore in respect to the straight faced tool 30.

When tools are thus being acted upon by the grinding wheel, the member 14, slidably mounted as it is, may be moved transversely of the cutting edge of said wheel and thereby present to said tools cleaner and more emcient cutting surfaces than ifsaid tools were sharpened along circumferential lines coincident with the locations of the several notches. Obviously, the grinding of said tools leaves metallic particles in the wheel, and the movement of said tools obtained through the slidability of the member 14 serves to spread and thin out said particles and will render all portions of the cutting edge of said wheel equally effective in sharpening said tools. Further, the sliding movement of the said member also serves to distribute the force exerted by said tools against the cutting edge of said wheel, preventing grooving and the consequent disadvantages thereof.

While the utilization of "an electric motor is preferable in supplyingp'ower to the grinding wheel, on account of its compactness and even running qualities, it is evident thatsaid wheel may be actuated in other ways, and supporting means provided, other than shown, for mounting the dental-tool guide and support in operative position relative to a grinding wheel, and still be within the scope of my invention. And, other changes in and modifications of the construction described may be made without departing from the spirit of my invention or sacrificing its advantages, hence it is asked that I be not confined to the specific structure set forth, except as limited by the appended claims.

I claim:

1. In a dental-instrument grinding device, the combination of a vertically disposed grinding wheel, and a dental-tool guide and support mounted oppositely of the cutting edge of said wheel, said-guide and support including a tool supporting and guiding member to facilitate the grinding of dental chisels, hatchets, hoes, angle formers and gingival margin trimmers, said member being slidable transversely ofsaid wheel and provided with a plurality of notches, V-shaped in cross section, for guiding and supporting said dental tools in different cutting positions relative to said edge.

2. In a dental-instrument grinding device having a vertically disposed grinding wheel; a dentaltool guide and support positioned oppositely of the cutting face of said wheel, comprising a toolguiding and supporting member to facilitate the grinding of straight-faced and angularly-faced dental tools, said member being slidable-trans-' versely of said face and having a plurality of straight and angularly disposed notches, V-shaped in cross section, for guiding and supporting said dental tools in predetermined rinding positions relative to said face.

- 3. In a dental-instrument grinding device hav-,

ing a grinder; a dental-tool guide andsupport, instrumental in sharpening and beveling dental tools, comprising a body portion, and a tool guidhaving top edges disposed in a plane inclined away from said grinder, to afford guide means for beveling said tools.

4. In a dental-instrument grinding device having a vertically disposed grinding wheel; a dental tool guiding and supporting member instrumental in sharpening dental tools, said member having a straight notch, V-shaped in cross section, for positioning straight faced dental tools to said wheel, and a pair of angular notches, V-shaped in cross section and reversely disposed, for positioning angularly faced dental tools to said wheel in making right-hand and left-hand cuts, the said member being mounted for sliding movement transversely of the cutting edge of said wheel and having a range of movement of such a characteras to prevent grooving of said wheel in grinding said tools.

5. In a dental-instrument grinding device having a motor and a vertically disposed grinding wheel rotatable by the motor; instrumentalities to facilitate the sharpening and beveling of dental tools, comprising a lightweight guide-bar member secured to said motor and extending oppositely of the cutting edge of said wheel, and a lightweight dental-tool guide and support slidably mounted in said member and manually movable transversely of said edge, said dental-tool guide and support being provided with a plurality of notches for positioning dental chisels, hatchets, hoes, angle formers and gingival margin trimmers in grinding contact with said edge, and said notches having top edges disposed in a plane inclined away from said edge, to afford guides for beveling said tools.

6. In a dental-instrument grinding device having a motor and a vertically disposed grinding wheel-actuated by the motor; light-weight instrumentalities to facilitate the grinding of dental dental'tools to said wheel, and a pair of angular.

notches reversely disposed, for positioning angularly faced dental tools to said wheel in making right-hand and left-hand cuts.

7, In a dental-instrument grinding device having a vertically disposed grinding wheel; instrumentalities of lightweight construction for positioning dental tools in grinding contact with said wheel, comprising a plate-like body portion attachable to a support, a horizontal guide extending from said portion and disposed in substantially the same plane as said portion, and a dentaltool guide'and support slidably mounted on said horizontal guide and provided with a flat body portion having an upper edge section carrying a plurality of notches for guiding and supporting dental tools in different cutting positions relative to said wheel.-

OTTO SUTER.

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