US 2883692 A
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Description (OCR text may contain errors)
April 28, 1959 PI. KAYE ET AL 2,883,692
RETRACTABLE TOOTHBRUSH WITH ROTARY LOCK Filed July 11, 1957 F 1 VM /6 58 4 a0 20 42 /Z /0 /e 2 Hg. 3
INVENTORS Philip Ka e BY Edward E. a'i'e RETRACTABLE rooggggosn wrrn ROTARY Philip Kaye, Norridge, and Edward E. Tate, Chicago, Ill.,
. assignors to Lester R. Peilet, Chicago, Ill.
Application July 11, 1957, Serial No. 671,205
' 4 Claims. (Cl. 15-184) This invention relates to brushes, particularly tooth brushes or the like.
One object of the present invention is to provide a new and improved toothbrush which is retractable, so that it may be carried very conveniently in a pocket, purse, handbag or the like.
A further object is to provide a new and improved retractable toothbrush which is highly serviceable for its intended use of brushing teeth.
Another object is to provide a new and improved retractable toothbrush which locks securely in its extended position.
A further object is to provide a retractable toothbrush which also has means to retain the brush in its retracted position.
It is another object to provide a retractable toothbrush in which the bristles are positioned very conveniently, for an easy and comfortable brushing action, when the brush isextended.
Still another object is to provide a new and improved retractable toothbrush which is compact and attractive in appearance, yet is reasonably simple in construction and extremely low in cost.
Further objects and advantages of the present inven tion will appear from the following description, taken with the accompanying drawings, in which:
Fig. 1 is a longitudinal sectional view of a retractable toothbrush to be described as an illustrative embodiment of the present invention, the view being taken along the axis of the brush with the brush extended.
. Fig. 2 is a view similar to Fig. 1 with the brush retracted.
Fig. 3 is an end view of the brush with the brush retracted.
Fig. 4 is a transverse sectional view, taken generally along a line 4-4 in Fig. 1.
Fig. 5 is an elevational view of a telescopically movable bar or handle member embodied in the brush.
Figs. 6 and 7 are top and bottom plan views showing opposite sides of the bar of Fig. 5.
Fig. 8 is an enlarged cross sectional view, taken generally along a line 8--8 in Fig. 6.
As already indicated, the drawings illustrate a brush 10 which is retractable between the extended position of Fig. 1 and the retracted position of Fig. 2. The brush 10 is intended primarily for use as a toothbrush, but, of course, it may be employed for any other suitable purpose, with or without modifications to adapt the brush for-other uses. It will be apparent that the brush is extremely compact when it is retracted, as shown in Fig. 2, so that it may be carried very conveniently in a pocket, purse, handbag or the like. When the brush is extended, as shown in Fig. l, it'is fully and conveniently serviceable for brushing teeth.
Generally, the illustrated toothbrush 10 comprises a plurality of suitable bristles 12 mounted on a handle 14 having two parts or members 16 and 18 which are engagedfor telescopingmovement between the extended 2,883,692 Patented Apr. 28, 1959 and retracted positions of the brush. member 16 is formed with a longitudinal bore or opening 20 which is adapted to receive the secondhandle member 18. It will be seen that the second handle member 18 takes the form of a bar which is generally cylindrical in shape, for reception in the bore 20. The bar 18 has an outer end portion 22, on which the bristles 12 are mounted, and an inner end portion 24 which is substantially cylindrical in shape. portion 22 is offset laterally with respect to the inner portion 24. Thus, the outer portion 22 has a substantially fiat longitudinal surface 26 which is set in from the corresponding side of the inner portion 24. The bristles 12 project laterally from the flat surface 26. On its op posite side, the outer portion 22 has a cylindrically curved surface 28 which constitutes an extension of the cylindrical outer surface on the inner portion 24.
In this case, the hollow handle or grip member 16 is' generally rectangular in cross section. The bore 20 is offset laterally in one direction from the axis of the mem ber 16. To receive the bristles 12, the member 16 is formed with a recess or cavity 30 which extends laterally from one end of the bore 20 in a direction opposite from the direction in which the bore is offset. The recess 30 is of a shape and size corresponding closely to the contour or bulk of the bristles 12. In this case, the recess 30 is generally rectangular in shape.
When the brush 10 is retracted, the bar 18 is received almost entirely within thebore 20, while the bristles 12 are housed within the recess 30. The bar 18 has aj rounded end portion 32, at its base or inner end, which projects slightly out of the bore 20, when the brush is teeth. The bristles extend beyond the contour of the grip member 16 so that the brush may be employed with-. out any substantial possibility that the grip member 16 will strike the teeth or lips of the user.
In order to guide the extension and retraction of the brush 10, one of the handle members is formed with a track which is engaged by a follower element on the other handle member. In this case, the track takes the form of a groove 34 on the bar 18. It will be seen thatthe groove 34 has a longitudinal portion 36 and a circumferential portion 38. The longitudinal portion 36 extends along the entire outer portion 22 of the bar 18,
at a point thereon generally opposite from the bristles 12. The inner end of the longitudinal groove portion 36 communicates with one end of the circumferential:
portion 38. It will be seen that the circumferential portion 38 extends part way around the inner portion 24 of the bar 18. More specifically, the circumferential groove portion 38 extends approximately half way 'around the cylindrical portion 24. The circumferential groove portion 38 has a closed end 40 on the opposite In the illustrated brush 10, the groove 34 is followed by a generally circular key or follower 42, which projects into the bore 20 at a point opposite from the recess 30.
When the brush 10 is retracted, the projection 42 is en-' 3 gaged with the keyway or groove element 36 at a point opposite from the bristles 12, as shown in Fig. 2. It will be apparent that the engagement between the projection Thus, the handle In effect, the outer,
In this way, the bristles are conveniently position for use in brushing side of the bar 18 'from the longitudinal groove portion I and h g n l g o e por ion 296. insures, that the bristles 12 will be properly aligned for reception in the cavity 30. The passage of the bristles 12 into the cavity 30 may be facilitated by forming chamfers or bevels 44 on the handle member 16, at the entrance to the cavity 30. It will be apparent from Figs. 14; that the. hevels 44 flare from the entrance end of the cavity or recess 3%}, and are adapted to align the bristles with the cavity. Moreover, the bevels will compress the bristles for easy entrance into the cavity if the bristles have been spread or flared by use. Thus, the bristles are restored to their original contour whenever the bristles are retracted into the cavity.
A catch or detent 46 is provided to detain the brush 1 0, in its retracted position, so as to prevent accidental extension of the brush. In this case, the catch 46 simply takestheforrn of a projection extending a small distance intothe, bore 20 adjacent the inner end of the hollow grip member 16. The catch 46 is engageable with the circumferential groove portion 38 when the bar- 18 is fully retracted.
The brush is extended by sliding the bar 18 longitudinally out of the bore 20. The initial extending move ment may be brought about by pushing inwardly on theprojecting end portion 32 of the bar 18, until the outerportion 22 of the bar may be grasped and pulled out of the bore 20.
The brush 10 is locked in its extended position byrotating the bar 18 through approximately a half turn. During such retention of the bar 18, the projection 42; travels along the circumferential groove portion 38, until the projection arrives at the closed end 40 of the groove 38;. A second catch 48 is provided to detain thQPIQjec tion 42 in the closed end portion 40 of the groove portion 38. In this case, the catch 48 takes the form of a thin; spring member, made of metal orother suitable resilient, material, which projects slightly into the groove 38, adjacent the end thereof. The illustrated catch 48 is tapered in shape. and is seated in a tapered socket or slot 50 Whichis formed in the bar 18 adjacent the groove 38, The catch 48 and the socket 50 are tapered towardthe groove 38 to prevent the catch from falling into the groove. The depth of the socket 50 is somewhat-greater: than the thickness of the catch 48, so that the catch may springupwardly to permit the projection 42 to pass: thecatch and enter the closed end 40 of the groove 38.
When the brush 10 is extended, the bristles 12 project in a direction corresponding to the lateral direction in which the bore is offset from the axis of the handle,
member 16. Thus, the bristles 12 are in anoffset position for convenient use in brushing teeth. It will be; seen from Fig. 1 that the bristles project well beyond-the; contour of the hollow handle member 16, sov that there will be no substantial possibility that the member 16 will strike the teeth or lips of the user.
When the brush 10 is retracted, the bristles 12 extend; in the opposite lateral direction, so that they may be housed compactly in the recess 30. It will be apparent The telescopically engageable handle members;.-mayreadily be molded from suitable plastics, such as nylon, polystyrene or the like. Thus, the brush member maybe easily manufactured at extremely low cost.
Various modifications, alternative constructions andequivalents may be employed without depriving from; the true spirit and scope of theinventio-n, as exemplified in the, foregoing description and defined in the, following;
It will be apparent that the- We claim;
1. In a retractable toothbrush, the combination comprising a bar having a generally cylindrical inner portion and an outer portion oifset laterally from said inner portion, said outer portion having a plurality of bristles projecting laterally therefrom in a direction opposite to the direction in which said outer portion is offset, a handle having a longitudinal borev therethrough slidably receiving said inner portion of said bar, said handle having a cavity therein communicating with said bore at one end thereof for receiving said bristles, said cavity being offset laterally from said bore and being of a size corresponding closely to the original bulk of said bristles, said bar having a keyway therein extending longitudinally along the side of said baropposite from said bristles, a generally semi-circular groove extending substantially half way around said inner portion of said bar and communicating with one end, of saidv keyway, said groove being near the opposite end of said bar from said bristles, said handle, having; a key; element thereon projecting into said bore, at a point gencrralhl, opposite. from saidv cavity, said key element beingslidablyreceivable in said keyway and said groove, said bar being movable into and: out of said handle between extended and retracted positions, said bar beingv S11..bstantiallyfully received within said. bore and said bristles beingclosely: received within said; cavity with said bar in said retracted position, said handle having bevels-fiaringfrom; said cavity at the entranceend thereof for aligning said bristles with said cavity and: compressing said bristlesfor easy-entrance into said cavity even if said bristles have: been spread by use, said key element being received in said keyway opposite saidbr-istles with said, bar retracted, a. first catch projecting into said bore and; engageable with said groove for de tainingsaidbar in said retractedtposition, said bar being: adapted to be extended by sliding said bar outwardly ofsaid bore; with said key" element. traveling along said keyway, said bar; beingadapted, to be locked in its ex:-
tended position; by rotating-said. bar through substantially one-half revolution with said keys'element traveling alongsaid groove to the; end thereof opposite from said keyway, and a second catch projecting, into said groove ads therefrom, said first handle memberhaving a recessthere in communicatinglaterallywith. saidbore: at oneend thereof for, receiving, said, bristles; one of said: members having a track thereini with. av first portion: extending longitudinally therealong :and a;second. portion extending circumferentially generally halfway therearound from one end of said first portion, thexother of: saidmembers having a follower element, slidably engaged with said track, said second handle member being movable longitudinally between a retracted, position withtsaid second member received withingsaid: bore and with saidifollower' engaged,withsaid; first portion of said track at the-opp site. endthereof fronasaidi second portion of said track,
and a; preliminary extended; position with said second member moved outwardly-of said firstmemberandwitlr saidfollower elernent-engaged withsaidsecond portion of theiunction; of said firstwportion andsaid track, said sec-- ondhandle;memberthereupon being rotatable through generally one-half turn to an extended and'lockedposition; with said follower, element traveling along: said second portion of, ,said-vtrackgto; theremote end thereof 'rela;
tive, to; said. first: portionia; first" catch engageable with: aid secon Pertinent; saidtrackion detaining said lsec ond member in its retracted position, and a second catch projecting into said second portion of said track adjacent said remote end thereof for detaining said follower element therein, said bristles extending laterally beyond and well clear of said first handle member with said second handle member rotated into its extended and locked position.
3. In a retractable toothbrush, the combination comprising a hollow handle having a longitudinal bore therein with the axis of said bore offset from the axis of said handle, a bar slidably and rotatably received in said bore and having a plurality of bristles projecting laterally from the outer end of said bar, said handle having a recess therein communicating with one end of said bore and extending laterally therefrom for receiving said bristles, said bar having a groove therein with a longitudinal portion extending along said bar generally opposite from said bristles and a circumferential portion extending generally half way around the inner end of said bar from the inner end of said longitudinal portion, a follower element on said handle projecting into said bore at a point generally oposite from said recess, said bar being telescopically movable into and out of said bore between extended and retracted positions, said follower element being engaged with said longitudinal portion of said groove with said bar retracted, said follower element being movable along said longitudinal portion of said groove during extension of said bar, said bar being rotatable in its extended position through generally a half turn with said follower element traveling along said circumferential portion of said groove to the remote end thereof relative to said longitudinal portion, and means for detaining said follower element in said remote end of said circumferential portion of said groove to lock said bar in its extended position, said bristles extending laterally beyond and clear of said handle for convenient use with said bar locked in its extended position.
4. In a retractable toothbrush, the combination comprising a hollow handle having a generally longitudinal bore therein, a bar slidably and rotatably received in said bore and having a plurality of bristles projecting laterally from the outer end of said bar, said handle having a recess therein communicating with said bore for receiving said bristles, said bar having a groove therein with a longitudinal portion and a circumferential portion extending generally halfway around the inner end of said bar from the inner end of said longitudinal portion, a follower element on said handle projecting into said bore, said bar being telescopically movable into and out of said bore between extended and retracted positions, said follower element being engaged with the outer end of said longitudinal portion of said groove with said bar retracted, said follower element being movable along said longitudinal portion to the inner end thereof during ex tension of said bar, said bar being adapted to be locked in its extended position by rotating said bar through generally a half turn with said follower element traveling along said circumferential portion of said groove to the remote end thereof relative to said longitudinal portion, said bristles extending laterally beyond and clear of said handle for convenient use with said bar locked in its extended position, said recess being ofi'set laterally from said bore at the outer end of said handle, said recess being of a size corresponding closely to the original contour of said bristles, said handle having bevels flaring from said recess at the entrance end thereof for alignment of said bristles with said recess and compressing said bristles for easy entrance into said cavity even if said bristles have been spread by use.
References Cited in the file of this patent UNITED STATES PATENTS 428,415 Riley May 20, 1890 1,134,459 Kalina Apr. 6, 1915 1,188,214 Sohn June 20, 1916 1,432,717 Miller Oct. 17, 1922 2,591,537 Gordon Apr. 1, 1952 2,637,868 Hamilton May 12, 1953 FOREIGN PATENTS 1,024,908 France Jan. 10, 1953 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No, 2,883,692
April 28, 1959 Philip Kaye et a1.
It is hereby certified that error appears in the-printed specification of the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.
Column 4, line 69, strike out the junction of said first portion and" and insert the same before "said second portion" in line 68, same column.
Signed and sealed this 25th day of August 1959.
KARL AXLINE ROBERT c. WATSON Commissioner of Patents Attesting Oflicer