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Publication numberUS3333582 A
Publication typeGrant
Publication dateAug 1, 1967
Filing dateMar 23, 1964
Priority dateMar 23, 1964
Publication numberUS 3333582 A, US 3333582A, US-A-3333582, US3333582 A, US3333582A
InventorsCathcart Jack F
Original AssigneeShur Fit Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Custom fittable mouth protector
US 3333582 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

A ;1961 J.F.ATHART 3,333,582

CUSTOM FITTABLE MOUTH PROTECT-ORV Filed March 23, 1964 f 2 Sheets-Sheet 1 INVENTOR. JACK FI GATHGART Hi5 ATTORNEYS Aug. 1, 1967 J. F. CATHCART CUSTOM FITTABLE MOUTH PROTECTOR 2 Sheets-Sheet 2 Filed March 23, 1964 .mm Ow mwPD 0? mm Om m. Y O


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HIS ATTORNEYS United States Patent 3 333,582 CUSTOM FITTABI JE MOUTH PROTECTOR Jack F. Cathcart, Berkeley, Calif., assignor to Shur-Fit Corporation, a corporation of California Filed Mar. 23, 1964, Ser. No. 353,733 3 Claims. (Cl. 128-136) My invention relates to mouth protectors and more particularly to a mouth protector of the custom fittable yp A custom fitted mouth protector is one fitted to the teeth of the individual who is to use it, and thus provides for better retention and greater comfort to the wearer. It is therefore to be preferred over one which is not so personalized.

In my patent for mouth protector No. 2,759,041 of June 19, 1956, I disclose specifically, a mouth protector of the custom fittable type in which the hull is of soft vellum or pure rubber, with the fill material for such hull having an ingredient of rubber which makes it compatible with the material of the hull.

However, a hull of resilient plastic is deemed preferable to one of rubber by reason of its being tougher, less porous and therefore more sanitary, besides requiring no vulcanization in the processing thereof, and otherwise presenting greater eye appeal to the user. Mouth protectors of such material are currently being produced but are of the open trough type, such as disclosed in Patent No. 2,966,908 for Universal Mouth Protector, in which I am a joint inventor.

Such type of mouth protectors have not previously been produced with a fill adapted to take and hold an impression of ones teeth so as to custom fit the same to an individual, because of the difiiculty of providing a fill material which would be compatible with the hull material, and at the same time possess the qualities and characteristics deemed necessary in a fill material.

The mere ability to retain fill material in the trough of the hull is not, in and of itself, a solution to the problem. The material for one thing, must :be non-toxic to humans, and this is of the utmost importance. The material, furthermore, must not only be able to take an impression of ones teeth at temperatures within the ability of a human being to stand, but must also be such as to retain such impression within such range of lower temperatures in which it will be exposed in use.

Also, quite desirable from the viewpoint of fabricating the device, is the ability and convenience with which one can assemble and fix the fill material into the hull of the mouth protector, and under conditions which may be deemed reasonable from an economic and manufacturing standpoint.

Accordingly, among the objects of my invention are:

( 1) To provide a novel and improved mouth protector;

(2) To provide a novel and improved mouth protector of the custom fittable type, formed throughout of resilient plastic material;

(3) To provide a novel and improved mouth protector of resilient plastic maerial capable of being custom fitted to an individual;

(4) To provide a novel and improved method of fabricating a mouth protector of resilient plastic;

(5) To provide a novel and improved method of fabricating a mouth protector of resilient plastic, and capable of taking an impression of ones teeth.

Additional objects of my invention will be brought out in the following description of a preferred embodiment of the same, taken in conjunction with the accompanying drawings wherein:

FIGURE 1 is a three-dimensional view depicting the mouth protector of the present invention;

' FIGURE 2 is a graph depiciting temperature-time rela- 3,333,582 Patented Aug. 1, 1967 ice tionships applicable in the fabrication of the mouth protector of the present invention.

Referring to the drawings for details of my invention in its preferred form, I provide a hull 1 of trough shape, the physical characteristics of which are not critical to the present invention. In its preferred form, however, the hull preferably takes on the physical characteristics and features of that depicted in the aforementioned patent for Universal Mouth Protector, No. 2,966,908. The hull will, furthermore, be preferably formed of material similar to the vinyl resin plastic specified in such patent and which may be generically referred to as a vinyl polymer, the specific polymer employed in the preferred form, being poly-vinyl chloride.

The fill material 3 may be one of the group generically referrable to as a vinyl co-polymer, and in the preferred form of the invention, such fill material will be ethylenevinyl acetate. This material is available on the market under the Du Pont trademark Elvax, the particular grade preferred, having a vinyl-acetate content of 2'1 to 34 per cent.

Such material is not only non-toxic to humans, but I have found through extensive experimentation, that this material may be bonded to material such as that employed in the molding of the hull, and at temperatures above body temperature, but yet, which are sufliciently low to be readily obtainable through use of apparatus readily available on the market.

A study of the graph of FIGURE 2 will show that within a range of temperature of the order of 200 F. to 400 F., the two materials are capable of being chemically fused or bonded, the time of exposure to such temperatures varying with the temperature in accordance with the curve 5 depicted in the graph.

Points along this curve are not critical as to time interval of exposure to the temperature related thereto, and this has been depicted at selected points along the curve by horizontal solid lines 7 terminating at each end in a dash line extension 9. The solid line indicates that good bonding may be realized at the related temperature, within a period of time spanned 'by the line in question, while the dash line extensions indicate possibility of realizing bonding for the additional time periods but the situation is not ideal. The points at which the curve intersects these horizontal solid lines represent ideal processing times or periods for the particular temperatures indicated by such lines.

In fabricating a mouth protector in accordance with the present invention, the fill material is extruded or otherwise formed into a strip adapted to fit into the trough or channel of the hull, following which, the hull, with the fill material therein, is then placed into an oven or equivalent which has been pre-heated at a dry heat, to the selected temperature, and is maintained in such dry heated atmosphere for a time interval required to effect proper bonding of the fill material to the hull, which values may be obtainable from the chart.

No adhesive or bonding cement is required in the process. It is believed that bonding is realized by a penetration of molecules of one material into those of the other material, which upon cooling, results in the bond between the two materials.

The mouth protector when removed from the oven and cooled, is ready for application in the custom fitting of the same to the individual who is to use the device. The protector is placed into a small bowl or pan, and boiling water poured thereover until it is completely immersed. After remaining immersed in the water for two to three minutes, the fill material is in a softened condition and ready to take an impression.

The device is then removed from the water, and after shaking off all excess water, the intended user inserts it into his mouth with his upper or lower teeth in alignment with the trough, and then brings his jaws together in a normal closing manner, keeping them clenched for approximately two minutes. The mouth protector may then be removed and chilled under cold tap water. It is then ready for use by the individual.

If a perfect impression of the individuals teeth has not :been realized, attributable possibly to inaccurate positioning of the protector while making the impression in the first instance, the mouth protector can be reheated in the manner previously described above and another impression taken.

From the foregoing description of my invention in its preferred form, both as an article of manufacture and the method of fabricating the same, it will be apparent that the same fulfills all the objects of my invention, and while I have illustrated and described the same in its preferred form, and in considerable detail, I do not desire to be limited in my protection to the specific details illustrated and described, except as may be necessitated by the appended claims.

I claim:

1. The method of fabricating a mouth protector comprising:

placing into a trough shaped hull formed of a vinyl polymer, a fill of a vinyl co-polymer, which is nontoxic to humans and has a fusion temperature with the hull material above that of body temperature,

4- and heating said hull with said fill therein, to a temperature at which fusion takes place. 2. The method of fabricating a mouth protector comprising:

5 placing into a trough shaped hull formed of a vinyl 15 polymer, such as poly-vinyl chloride,

a fill of a vinyl co-polymer, such as ethylene-vinyl acetate, which is non-toxic to humans and has a fusion temperature with the hull material above that of body temperature, and dry heating said hull with 20 said fill therein, to a temperature at which fusion takes place.

References Cited UNITED STATES PATENTS 2,966,908 1/1961 Cathcart et al 128-136 5 3,124,129 3/1964 Grossberg l28l36 3,207,153 9/1965 Goldstein 128l36 ADELE M. EAGER, Primary Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2966908 *Jan 27, 1958Jan 3, 1961Cathcart Jack FUniversal mouth protector
US3124129 *Apr 30, 1962Mar 10, 1964 Teeth protector
US3207153 *Dec 3, 1962Sep 21, 1965Harry J Bosworth CompanyMouth protector device
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5033480 *Mar 23, 1990Jul 23, 1991Wiley Christopher WShort self adhesive denture guard
US5406963 *Feb 26, 1993Apr 18, 1995Adell; Loren S.Mouthguard
US5415544 *Feb 25, 1991May 16, 1995Minnesota Mining And Manufacturing CompanyPreloaded thermoplastic dental impression tray
US5570704 *Dec 20, 1994Nov 5, 1996Snoreless CorpUniversal, user-adjustable oral cavity appliance to control snoring and reduce episodes of obstructive sleep apnea
US5591786 *May 19, 1995Jan 7, 1997Minnesota Mining And Manufacturing CompanySemi-thermoplastic molding composition having heat-stable custom shape memory
US5709548 *Feb 18, 1997Jan 20, 1998Minnesota Mining And Manufacturing CompanyDental crown liner composition and methods of preparing provisional applications
US6494210Mar 5, 2001Dec 17, 2002Frank L. MamsMethod of advertising with a mouthguard
US7128072Dec 14, 2001Oct 31, 2006Total Gard CorporationMouthguard
US7422017May 9, 2006Sep 9, 2008Total Gard CorporationMouthguard
US7658193Jun 4, 2007Feb 9, 2010Hayloft Enterprises, Inc.Interocclusal appliance and method
US8316859Jan 26, 2010Nov 27, 2012Hayloft Enterprises, Inc.Interocclusal appliance and method
US8459989 *Jul 14, 2010Jun 11, 2013Lm-Instruments OyOrthodontic activator
US8607798Jun 2, 2011Dec 17, 2013Shock Doctor, Inc.Custom mouthguard
US8689796May 17, 2011Apr 8, 2014Shock Doctor, Inc.Mouthguard with linear storage configuration
US9345276Mar 13, 2014May 24, 2016Shock Doctor, Inc.Clothing article with protective cup
US20030111083 *Dec 14, 2001Jun 19, 2003Total Gard CorporationMouthguard
US20070131232 *May 9, 2006Jun 14, 2007Bancroft James JMouthguard
US20070178420 *Jul 7, 2004Aug 2, 2007Lm-Instruments OyOrthodontic activator
US20080289639 *Jul 10, 2008Nov 27, 2008Total Guard CorporationMouthguard
US20100139670 *Jan 26, 2010Jun 10, 2010Hayloft Enterprises, Inc.Interocclusal appliance and method
US20100279246 *Jul 14, 2010Nov 4, 2010Lm-Instruments OyOrthodontic Activator
USD663485 *Jun 2, 2010Jul 10, 2012Shock Doctor, Inc.Custom mouthguard
USD663486 *Jun 2, 2010Jul 10, 2012Shock Doctor, Inc.Custom mouthguard
USD688832May 17, 2011Aug 27, 2013Shock Doctor, Inc.Mouthguard
USD734556 *May 24, 2013Jul 14, 2015Sportsguard Laboratories, Inc.Mouthguard with lipguard
USD743108 *Oct 10, 2014Nov 10, 2015New Age Performance Inc.Mouth guard
USD752295 *Oct 15, 2014Mar 22, 2016Opro International LimitedMouthguard
USD765919 *Jul 24, 2015Sep 6, 2016Theodore P CrollMouth guard
USD771876 *Jul 27, 2015Nov 15, 2016James T. HazardMouthpiece
DE3816769A1 *May 17, 1988Aug 31, 1989Manfred MagnusDevice for producing a tooth-protecting insert for preventing and suppressing grinding of the teeth and for preventing abrasion of teeth in tooth grinders
U.S. Classification128/862, D24/176
International ClassificationA63B71/08
Cooperative ClassificationA63B71/085
European ClassificationA63B71/08M
Legal Events
Sep 30, 1982ASAssignment
Owner name: BRIMMS INC.,
Free format text: MERGER;ASSIGNOR:SHIELD MFG., INC;REEL/FRAME:004055/0278
Effective date: 19800808
Owner name: BRIMMS INC.