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Publication numberUS2517029 A
Publication typeGrant
Publication dateAug 1, 1950
Filing dateAug 15, 1946
Priority dateAug 15, 1946
Publication numberUS 2517029 A, US 2517029A, US-A-2517029, US2517029 A, US2517029A
InventorsRidner Sr George S
Original AssigneeRidner Sr George S
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Telescopic toothbrush
US 2517029 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

INVEN TOR.

Sn wfi a G S RIDNER, 5R

TELESCOPIC TOOTHBRUSH' Aug. 1, 1950 Patented Aug. 1, 195 0 UNITED STATES PATENT OFFICE TELESCOPIC TOOTHBRUSH George S. Ridner, Sr., Newark, N. J.

Application August 15, 1946, Serial No. 690,752

1 Claim. 1

This invention relates to tooth brushes of the collapsible type.

An important object of my invention is to provide a tooth brush comprising a hollow handle and a brush head adapted to be telescoped within the handle when the tooth brush is not in service but which is slidable outwardly to extended position through an open end of the handle when the brush is to be used for brushing the teeth.

Another object ofmy invention-is to provide a tooth brush of the above character including means which, when the brush is telescoped to inoperative position, engage the rows of bristles and press them laterally together so that during drying of the bristles they will restore themselves to generally the same erect position as when new, thus preserving the life of the tooth brush.

Still another object of my invention is to provide a tooth brush of the above character in which the brush head as it is drawn outwardly from the handle forms a tight frictional lock therewith so as to maintain the tooth brush against collapse during its period of use.

As an additional object, my invention provides a tooth brush which is adapted to be quickly and conveniently extended and collapsed and which in the latter condition occupies a very small space so as to be readily carried about upon the person or in a toilet kit or a ladys handbag.

Other objects and advantages will be apparent from the following detailed description of a preferred embodiment of the invention, reference being had to the annexed drawing in which:

Figure 1 is a perspective view showing a telescopic tooth brush in extended position:

Figure 2 is a perspective view showing the tooth brush fully collapsed;

Figure 3 is a transverse cross-sectional view of the brush taken on the line 33 of Fig. 1;

Figure 4 is an exploded view of the handle; and

Figure 5 is a plan View in part sectional of one end of the tooth brush with the brush head in extended position.

The collapsible tooth brush shown in the drawing comprises a hollow handle I and a brush head 2 slidably associated with the handle so as to be telescoped into and out of the handle through an open end thereof.

The handle, as best shown in Fig. 4, is made in two sections, namely a trough-shaped shell 3 having its side walls 3a longitudinally recessed, as indicated at 4 to provide a trackway for the brush head, and a cover 5 adapted to overlie and close the open side of the shell.

The brush head is of generally rectangular when the brush head is drawn outwardly of the handle the block makes a wedge fit within its trackway as the brush head reaches its fully ex- 5 tended position, as indicated in Fig. 5.

The cover 5 rests upon the upper edges of the two side walls 3a of the shell 3 and has a pair of downwardly projecting ribs 8 which rest against the inner faces of the walls 3a of the shell 3 and are cemented thereto so as to hold the shell and cover together in unitary assembly. One end of the cover-that is, the end overlying the tapered trackway section ta of the shell-has a longitudinal slot 9 into which the bristles 5 of the brush head are adapted to slide when the brush is collapsed. The width of this slot corresponds to approximately the width of the area on the head occupied by the bristles so that as the brush head is slid into the handle the sides of the slot exert lateral pressure upon the longitudinal outer rows of bristles whereby the bristles are forced together and urged to upright position. Thus, following use of the tooth brush while the bristles are still wet, the slot 9 serves to restore the bristles to their original erect position which, after drying out, the bristles will tend to maintain and thereby prolong the eiiective life of the brush.

The end of the shell 3 nearest the brush head is externally reinforced by a metal band .H] to avoid spreading of the sides 3a as the block 1 wedges against the converged portion 4a of the grooves 4, while the opposite end of the shell is closed by a down-turned section 5a of the cover 5 which is cemented to the end of the shell. A drain opening I l is formed in the downturned section to for the escape of any soap or water that may become entrapped within the handle.

The tooth brush is preferably made of plastic although it may be made of metal, or partly plastic and partly metal.

It will be apparent that when the brush is telescoped into the handle the tooth brush occupies a small space and may be conveniently carried in a pocket or compactly stowed away in a toilet kit, or ladys hand bag. In order to prevent the bristles from becoming soiled or from wetting the inside of the pocket, kit, or handbag, the tooth brush will preferably be placed in a waterproof receptacle, such as a plastic container, but since such container forms no part of the present invention it is not described herein.

It is within the purview of my invention to make the handle of unitary one-piece construction, if found desirable, instead of utilizing the shell and cover construction as described above.

Obviously various changes in the form, construction, arrangement and combination of the several parts of my new telescopic tooth brush may be made and substituted for those herein shown and described without departing from the nature and principle of my invention. as defined by the following claim.

I claim:

A collapsible tooth brush comprising an elongated hollow handle open at one end, a brush head its side walls cut away so that they together define a generally T-shaped recess for slidably receiving the brush head, said side walls being con- ,Vergingly inclined towards the open end of the handle and located adjacent thereto, and one end of the brush head terminating in a block of T- shaped cross-section adapted to travel within the recess and to bind within the convergingly inclined portions of the side walls, a cover closing the open longitudinal side of the shell and having REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,407,214 Osborn Feb. 21, 1922 1,468,431 Wodonos Sept. 18, 1923 1,731,500 Nielsen Oct. 15, 1929 1,7 97,946 Eichel Mar. 24, ,1931 1,826,234 Acheson ;O.ct. 6, 1931 1,947,720 Laub Feb. 20, 1934 2,060,869 Hopkins Nov, 17, 1936 2,083,728 Mayer June 15, 1937 2,093,007 Chott -0 Sept. .14, 1937 2,116,406 Nancarrow May 3, 1938 2,154,846 Heyman et al Apr. 18, 1939 2,160,618 Kreutzig May .30, 1939 2,253,210 ,Psiharis 1 Aug. 19,1941

FOREIGN PATENTS Number Country Date 221,092 Great Britain Sept. 4,1924

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1407214 *May 26, 1920Feb 21, 1922Leon OsbornToothbrush
US1468431 *Feb 21, 1921Sep 18, 1923Roman KarajemCleaning device
US1731500 *Oct 10, 1928Oct 15, 1929Andreas C NielsenToothbrush
US1797946 *Jan 8, 1930Mar 24, 1931Emil EichelToothbrush
US1826234 *Feb 4, 1929Oct 6, 1931James M AchesonToothbrush
US1947720 *Apr 9, 1931Feb 20, 1934Laub Stanley VToothbrush
US2060869 *Jun 1, 1936Nov 17, 1936Hopkins Joseph ADemonstration device
US2083728 *Nov 23, 1934Jun 15, 1937Harry G MayerFolding tooth brush
US2093007 *Sep 3, 1935Sep 14, 1937Hugo J ChottMechanical tooth brush
US2116406 *Oct 28, 1936May 3, 1938Nancarrow LoyalShoe sole and heel coloring device
US2154846 *Apr 8, 1938Apr 18, 1939Heymann George HMassage device
US2160618 *Dec 21, 1938May 30, 1939Kreutzig ElsaComb brush
US2253210 *Oct 15, 1937Aug 19, 1941 Gum massage device
GB221092A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2620500 *Oct 7, 1949Dec 9, 1952Ridner Sr George SCombination toothbrush and case
US2677842 *Nov 7, 1950May 11, 1954Sherwin Lawrence WToothbrush with dispensable cleansing pad
US2896241 *Oct 23, 1957Jul 28, 1959Cotman LawrenceCleaning device
US2908928 *Jul 11, 1957Oct 20, 1959Lester R PeiletDiagonally retractable tooth brush
US3278965 *May 17, 1965Oct 18, 1966Frazier Benjamin LTelescoping brush and holder
US5005246 *Sep 18, 1989Apr 9, 1991Yen Hui LinReplaceable tooth brush with tongue scaler
US5737792 *Sep 30, 1996Apr 14, 1998Quigless; KirkDispensable-head manual toothbrush and dispenser combination
US8234743Jan 15, 2011Aug 7, 2012William M WhiskerExtendable toothbrush
Classifications
U.S. Classification15/184, 15/144.1, 15/167.1
International ClassificationA46B7/02, A46B7/00
Cooperative ClassificationA46B7/023
European ClassificationA46B7/02A