US1402298A - Dental tray - Google Patents

Description

w. N. KIDDER. DENTAL TRAY.

APPLICATION FILED MAY 4. 1921.

1 $102,39 I Patented Jan..3,1922.

I db NK 22 Elmo/who;

" tree PATN FFEQ.

WILLIAM N. KIDDER, OFCRANSTON, RHODE ISLAND.

DENTAL TRAY.

To all whom may concern:

Be it known that 1, WILLIAM N. KIDDER,

a citizen of the United States, residing at city of Cranston, in the county of Providence and State of Rhode Island, have invented certain new and useful Improve ments in Dental Trays, of which the following is a specification.

This invention relates to improvements in dental impression trays, more particularly to that type of tray which is adapted tobe filled with impression material such as plaster of Paris or other suitable molding compound for the purpose of taking an impression of one or more teeth in the mouth of the patient; and the object of the invention is to form such a dental molding tray of two or more sections; means also being provided for binding said sections together and holding them in alignment with each other.

A further object of the invention is to provide an adjustable handle connected to said tray, which may be moved into different positions relative to the tray, whereby the tray may be used on the front or either side of either the upper or lower jaws, the handle also serving to bind the tray halves together.

With these and other objects in view, the invention consists of certain novel features of construction, as will bemore fullydescribed, and particularly pointed out in the appended claims.

In the accompanying drawing Figure 1 is a top view showing my improved tray witha handle member attached thereto securing the tray halves together. *Figure 2 is a section on line 22 of Figure 1, showing the cleavage-controlling ribs and the hub halves onto which the handle is clamped.

Figure 3 is a section on line 3-3 of Figure 1, showing one of the pairs of dowel pins for holding the tray halves in alignment.

Figure 4: is a central transverse section through the tray, showing the impression of a tooth as having been taken in the impression material with which the tray is filled, and showing the halves as having been separated and the mold as having been split along the line of the cleavage-controllin ribs.

igure 5 is a perspective view of one of the halves, showing sections of the cleavage Specification of Letters Patent.

Patented J an. 3, 1922.

1921. Serial no. 466,753.

.flange as turned down to form aligmng 'dowel pins; also showing a centering lug on the half of the attaching hub.

Figure 6 is a bottom view of the two halves of the tray assembled with the handle removed.

Figure 7 is a central elevation on line 7-7 of Figure 6, showing one of the aligning spurs or dowels on one half as entering the stock on the other half of the tray.

Figure 8 is a'section on line 8-8 of F ig ure 6, showing the spur on one half of the hub as entering the corresponding socket in the other half of the hub for the purpose of aligning or centering the parts.

Figure 9 is a side elevation of the tray showing the handle member as engaging and looked upon the hub, binding the halves together.

Figure 10 is a detail view of the binding handle member.

It is found in practice owing to the required curvature of the tray in order to conform somewhat to the curvature of the jaw of the patient, that the handle must be adapted to be moved to extend from either end thereof in order to be able to use the tray on either side of the jaw. Then again when it is desired to use the tray to take an impression of the front portion of the jaw it is necessary that the handle should extend straight forward or at right angles to the side walls of the tray; and the following is a detailed description of one means by which this and other important results may be accomplished.

With reference to the drawing, 10 designates the two halves of my improved tray, which may be made of any suitable material, preferably of metal, each half being provided with an outer, relatively-high, side wall 11 and an inner longitudinally-disposed, thin rib 12 extending along the line of separation 18 between the halves.

These ribs are for the purpose of entering the molding material and controlling the line of cleavage through the mold when the halves are separated, as best illustrated in Figure 4.

In order to hold these halves in alignment with each other I have provided a pair of dowel pins 14:, see Figure 3, those in one of the halves being adapted to extend into corresponding holes in the other half so that when these halves are brought together they will be in proper position and in absolute ali nment with each other.

I have also provided a downwardly extending hub or boss 15 on the bottom of the tray, said hub being in halves and each half being connected to its corresponding half or" the tray whereby when placed together" one complete circular boss is provided.

In order to bind these tray halves together I have provided a pair of long handle gripping-pliers 16, see Figure 10, the headlof which is curved or recessed as at 17, tofit aboutthe hub 15 and when so positioned the sliding lock-ring 18 is moved along the handle into position to lock the handle members of the pliers in position to gripand bind the hub halves and-so firmly secure the tray halves together. At the same time. the handle of these pliers serves as a convenient manipulating handle for thetra'y and by mounting these plier members on the circular hub they perform two functions first, the pliers bind the tray halves together; and second, they serve as a convenient means .for manipulating the tray. It will also be seen by this construction that the handle of these pliers may be moved or swung about on the circular hub which serves as a pivot and so set the handle in any desired position relative to the tray to extend from either end thereof, whereby it may be applied to either side of either jaw of a patient or it may be positioned to extend directly in front at substantially a right angle to the walls of the tray so that the tray may be readily applied to the front portion of either jaw of the patient for taking an impression.

In forming this hub 151 have made the same slightly tapering that is, a little larger at its outer or free end, than that portion where it joins the bottom of the tray so that when the handle is applied to the hub it will not slip off even when loosened up to be swung about to the different required positions relativeto the tray.

In some instances it:is1found to be of advantagetobe able to form these tray parts of sheet metal and to bendthe same up into the desired shape by a swaging process.

' In order to accomplish this in a simple and effective way and reduce the expense of construction, to the minimum, I first strike the tray halves so as to raise the outer wall 11 and also the central rib 12, see Figure 5, Ithen slit this rib in one of the halves and bend the slit portions so as to extend laterally providing dowel portions 20 which are adapted to fit into corresponding recesses 21 in the opposite halves of the tray, as illustrated in Figures 6 and 7.

I may also form the hub member 15 intwo separate parts, one half being provided with a laterally-extending boss or tongue 22 while the other half is provided with a cormembers are engaged by the adjustable handle 16 for binding the: tray parts together. V c

My improved sectional impression tray is extremely simple and, practical. in constructionand effective in its operation. and by its use impressions of teeth may be readily taken from either side of either, j awor from. the front portion of either jaw by simply adjustingthe position of the handle on the tray, and after the impression has been taken it is only necessary'to slide the little binding collar 18 of the handle downwardly toireleasethehub members of the tray, then an instrument is simply inserted into the crease between the halves and by a slight twist the halves are forcedapart and the mold will separate centrally and may be readily removed from the jaw without in any way injuring the impression obtained.

The foregoing description is directed solely toward the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting'to all the mechanical changes to which the device is susceptible, the invention being defined and claims.

I claim: 7

1; A dental tray comprising two: halves adapted to be bodily removed one from the other each having cleavage-controlling rib portion located along the lineof separa-. tion, means. forpaligningsaid halves when setftogether, and a projecting-, memberon each" half releasably engagedby an operatinghandleto;bindithe'halvestogether.

2. A dental tray: comprising two halves adapted tombs-bodily removed one fromthe other andjeach having a: cleavage-controlling rib portion located along: the line of separation," projecting liub halves on: said tray halves, and alhandlemeniber. having adjustable gripping means for. engaging said hub membersto bind said tray parts togethen. 7

3; A dental tray comprising two separable' halves, eaehhaving a cleavage control ling-"rib portionlocated along the line of separation, projecting members on each half,

and a. handle member! having adjustable gripping means for engaging said. proj ecting members to bind the tray parts together, said" handle being rotatably 'c'onnectedto said members and adapted to eX-' limited only by, the terms of the appended tend in different directions relative to the clamping jaws for gripping said hub halves tray. to bind the tray halves together, and means 4:. A dental tray comprising two separafor locking said jaws onto said hub halves, 10 ble halves each having a cleavage-controlsaid handle belng adjustable circularly 5 ling rib portion located along the line of about said hub.

separation, projecting hub halves on said In testimony whereofI afiix m signature. tray halves, a handle comprising a pair of WILLIAM N. IDDER.

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