US2234881A

US2234881A - Dental articulator

Info

Publication number: US2234881A
Application number: US233503A
Authority: US
Inventors: Stein Edwin Leroy
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-10-05
Filing date: 1938-10-05
Publication date: 1941-03-11
Anticipated expiration: 1958-03-11

Description

March 11, 1941. E. L. STEIN 2,234,881

DENTAL ARTICULATQR Filed Oct. 5, 195a fi'giz;

Patented Mar. 11, 1941 I UNITED STATES PATENT OFFICE Application October 5,

2 Claims.

This invention relates to certain new and useful improvements in dental articulators,such as plain and anatomical articulators, the object being to provide an articulator so constructed that the bite may be immediately corrected without the necessity of removing either model from the articulator, thereby saving a great deal of time and material.

Another object of my invention is to provide an articulator so constructed that a movement is obtained to correct the bite by allowing either side to be raised or lowered independent of and without affecting the position of the opposite side of the bite.

The front and back positions (anterior and posterior) may be raised and lowered without affecting opposite front or back to be maintained.

Another object of my invention is to provide an articulator in which there is a lost motion between the two jaw supporting members, means being provided for centering the jaw supporting members in the beginning of the operation, two means being provided for adjusting and locking the same.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the drawing- Figure 1 is a side elevation of a dental articulator constructed in accordance with my invention;

Figure 2 is a detail end elevation; and

Figure 3 is a perspective view of the various parts for allowing the members to move and swing in respect to each other.

In the drawing l and 2 indicate the upper and lower jaw supporting members which are provided with apertured plate portions 2' and 3 to receive plaster of Paris or the like to form a support for the artificial models or jaws: 4 and 5 o-n'which the upper and lower teeth 6 and 6' are set in wax.

The lower jaw support member I is provided with a pair of upwardly and rearwardly extending arms 1 and 8 connected together by a bar 9 carrying a stop screw Ill. The free ends of the arms I and 8 are provided with threaded bores in which are mounted threaded bearin pins II and I2 provided with conical points seated in conical sockets l3 formed in the end of an oblong square block l4 provided with a transverse bore in which is secured a threaded 1938, Serial No. 233,503

bolt [5 on which is loosely mounted a clamp bar l5 and the apertured lower end of a centering member l6 which is provided with a shoulder ll engaging the edge of the cross bar I5 as clearly shown. The bolt l5 carries a wing nut l8 for the purpose hereinafter fully described.

Arranged against one face of the block [4 between the block and clamp bar [5 is the depending bifurcated end IQ of an angle member which is adapted to be clamped in adjusted position against the block by the clamp bar l5 and wing nut l8 so as to allow the member 20 to move up and down and sidewise in respect to the block to produce lost motion and as the block is: pivoted, the member 20 can swing also.

The depending end I9 of the member 20 above the bifurcation is provided with a threaded base in which is threaded a screw 22 which extends through a slot l6 formed in the centering mem. her It so as to allow the centering member to 20 move freely on the member 20 and to be clamped in adjusted position by the tightening of the screw 22 and win nut H3.

The member 20 carries a bolt 23 which extends through a slot formed in the extension 2' of the jaw supporting member 2 and is adapted to be clamped in adjusted position by wing nut 23' carried by the bolt.

In the construction of articulator as herein shown, the lower jaw supporting member carries a pivoted block on which is loosely mounted a member for supporting the upper jaw supporting members and as this member is capable of moving up and down and sidewise in all directions, a lost motion is obtained so that the bite can be quickly corrected.

In the drawing I have shown one form of articulator but I do not wish to limit myself to any particular type of arti-culator as my invention consists broadly in providing a lost motion 40 to allow the jaw supporting members to move freely in all directions in order to correct the bite.

It is, of course, understood that when used in connection with an anatomical articulator, the attachment would have to be on the lower half or in a reverse position.

What I claim is:

1. A dental articulator comprising a pair of 50 jaw supporting members, one of said members being provided with a pivotally mounted block, a bolt carried by said block, the other jaw supporting member carrying an adjustably mounted angular member having a bifurcated end em- 55 bracing said bolt, a centering member mounted on said bolt having a loose connection with said angular member, a clamp bar for clamping said angular member against the face of said block, and a wing nut traveling on said bolt for clamping said angular member against the face of said block in adjusted position.

2. A dental articulator comprising a pair of jaw supporting members, one of said jaw supporting members carrying a pivotally mounted block, a bolt carried by said block, the other jaw supporting member carrying an angular member having a bifurcated end embracing said bolt, a clamp bar carried by said bolt adapted to engage said angular member, a centering member carried by said bolt having a pivotal and sliding connection with said angular member, a wing nut carried by said bolt for clamping said centering member against said clamping bar and said clamping bar against said angular member and means for locking said centering member in adjusted position.

EDWIN LEROY STEIN.