Note: Descriptions are shown in the official language in which they were submitted.
7~
Back~_ound of the Invention
Various devices and techniques have been proposed for
piercing of earlobes. In general, the surgical procedure of
earlobe piercing has been implemented by the use of specially
designed surgical instruments such as, for example, the type
shown in UO S. Patent No. 3,187,751. Such inst~uments typically
are employed to grip the earlobe and drive a piercing pin through
the earlobe. The pin typically must be loaded into the instru-
ment as a preliminary step. Propqr procedure usually requires
also that the surgical instrument and pin be autoclaved or other- ;
wise sterilized before use. My invention relates to an improved
preloaded, presterilized, disposable ear piercing device which
is of low cost and is intended for a single use, thus shortening
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the time required to perform the procedure by eliminating the
steps of autoclaving and loading the device.
SUMMARY OF THE INVE~TION
In brief, the invention includes a pair of spaced jaws
movable toward each other to a more closely spacedl although
- not fully closed, configuration to receive and firmly grip
. . .
an earlobe therebetween. One of the jaws includes means for
supporting a headed piercing pin and the other jaw includes
means for ~upporting a lock nut in alignment with the piercing
pin so that the tip of the pin may be secured to the nut af~er
the pin has pierced the earlobe. Means are provided in asso-
ciation with the pin carrying jaw by which the open jaws may
be squeezed together ~o their more closed configuration and
in which the continued subsequent application of further
squeezing pressure will cause a portion of the pin driving
means to fracture to instantaneously transfer the full squeezing
force directly to the head end of the pin. ~he fracturing
takes place instantaneou31y ~o that the pin is driven immediately
and quickly through the earlobe. The device then may be
released~ to free the combined pin and nut 90 that the device
may be withdrawn from the earlobe leaving the pin secured
thereto. The fracturing of the drive mean~ precludes subsequent
use of the device. The device may be preloaded with the pin
and nut and prepackaged in a sterilized condition so that it
-is ready for immediate u~e when de~ired.
-- 2 --
It is among the objects of the invention to provide an
improved ear piercing device of low cost which is suitable for
disposable one-time use.
Another object of the inve~tion-is to provide a pre~
packaged, pre~terilized ear piercing pin and nut and an instru~
ment for use therewith which can be presterilized and stored
in a ~terile condition until use.
Another object of the invention is to provide an ear
piercing device o the type described which is self-destructable
upon use, thus insuring that it may not be rèused.
Another object~)of the invention is to provide an improved
ear piercing device which is easy to align with a selected
location on an earlobe.
Still another object of the invention is to provide an
ear piercing device of the type described which is of extremely
~imple construction.
DESCRIPTION OF THE DRAWINGS
The foregoing and other objects and advantages will be
understood more fully from the following further description
thereof, with reference to the accompanying drawings wherein:
FIG. 1 is a side elevation of the ear piercing device,
FIG. 2 is an enlarged top view of the-device as seen from
the line 2-2 of FIG. 1,
FIG. 3 is an enlarged side elevation of the device, loaded
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l , with a pin and nut and partly broken away, with the jaws in their
2 Ill most c.losed position and in readiness to drive the piercing pin;
3 ¦ FIG. 4 is an illustration similar to FIG. 3 showing the de- !
4 1 Yice after the piercing pin has been driven;
5 ¦ FIG, 5 is an enlarged illustration of the nUt-carrying chuck;
6 I . FIG. 6 is an enlarged illustration of the plunger and show-
7 ing in phantom th.e manner in which its fracturable collar separ-
8 ll ates from the plunger;
9 ¦¦ FIG. 7 is an enlarged sectional view of a modified form of
10 ¦¦ the inYention as seen along the line 7-7 of FIG. 1.;
. FIG. 8 is a sectional elevation of the device taken through
12 ~¦ the pin cdrrying and drive means and showing a further modifi- ¦
13 ¦ cation of the.inventioni
14 . FIG. 9 is a sectional illustration as seen along.the line
15 1 9-9 of FIG. 8;
16 I :FIG. lO is a sectional elevation of the pin carrying and
17 ¦ :drive means showing a further embodiment of the invention;
1 18 ¦ . FIG. ll is a sectional elevation of the pin carrying and
l9 ¦i drive means showing a modified form of the pin driving mechanism;
20 ,I FIG. 12 is a-side elevation of the invention showing a
:, 21 j; number of further modiflcations;
22 ¦¦ FIG. 13 is a plan view of the device seen along the line
I : 23 ¦¦ 13-13 of FIG. 12;
24 ! FIG. 14 is a~side elevation of the device shown in FIG. 12
: 25 ll with the jaws in their most closed position;
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; 1 ¦ FIG. 15 is an illustration of the device as seen along the
2 ¦ iines 15-15 of FIG. 14;
3 1 FIG. 16 is an illustration of the sockgts in one of the
- 4 abutting pads as'seen along the line 16-16 of FIG. 13;
5 FIG. 17 is a par'tly broken away elevation of the device, .
6 I with its jaws closed and loaded;
7 ;l FIG. 18 is an enlarged elevational vie~ in partial cross
8 ¦ section of the preferred form of the invention, shown loaded
9 ¦ with a pin and nut;
10 1 FIG. i9 is a view taken along the line 19-19 of FIG. 18;
1 , FIG. 20 is a side elevation view of the plung'er used in
~ ' 12 1 the preferred embodiment of FIG. 18; and
`` 13 FIG. 21 lS an end v1ew of the plunger.
14 . '' '
15 ¦ Description of the Preferred Embodiment
16 As shown in FIGS. 1 and 2, the illustrative embodiment of
17 1 the device includes a generally U-shaped member including a pair
18 ! f legs 10, 12 3Oined at a bight 14, the upper ends of the legs
19 1 10,12 bei-ng considered as jaws 16, 18 respectively. The device
20 ¦ is fabricated from a singl'e piece of material, preferably a flex-
21 , ible transparent plastic and the bight region 14 is of sufficient
22 ¦ dimensions to enable the iegs 10, 12 and their jaws 16, 18 to be
23 ~ flexed toward each other from the relaxed configuration shown in
24 1 FIG. 1 to the closed configuration shown in FIG. 3. The bight 14
25 ¦ is sufficiently resilient so that when the squeeze-d legs are re-
26 leased? they will return to their relaxed configuration. Means
2-7 ¦ are provided for limiting the extent to which the jaws 16, 18
28 may be closed, such as the inclusion of abutting pads 20, 22 on
29 jj each of the legs which face inwardly toward each other and pre-,
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1 1 clude jaw closure beyond a predetermined amount as described be-
2 Il'low.
3 1 Secured to the upper end of the jaw 16 is a pin carrying
4 I device which may take the form of a hollow barrel 24 which is
5 1 receptive to a headed piercing pin Z6. The internal dimensions
6 1 of barrel 24 are such that the pin 26 may be held in place with-
7 in the'barrel, by engag'ement with the periphery of the head 28
, 8 of the pin but under a sufficiently light force which can be
g easily overcome so that the pin can be driven along and through
the barrel 24 as described herein. By way of example the device
11 ,may be made so that the pin will advance through the barrel
12 under a force of the order of a few ounces.
13 The pin carrying and driving mechanism also includes a
14 plunger 30 having a forward end which is received slidably in the
rearward end o~ the bore of the barrel 24. An enlarged knob 32
~' 16 may bè'formed at the rearwardly protruding end of the plunger 30.l,
17 The plunger 30 also is preferably formed from a single piece of
18 ¦I plastlc material. It includes a thin circumferential collar 34
1 19 ¦i formed integrally therewith and between the ends o~ the plunger
I
20, ,' 30. The collar extends radially outwardly from the plunger so
21 'that it will engage the rearward surface 36 of the barrel 24 and
22 preclude further passage of the plunger 30 through the barrel 24
23 except as described more fully below. The collar 34 is located
24 longitudinally on`the plunger 30 in relation to the length of
the piercing pin 26 and the location of the forwardmost end
26 j 38 of the barrel 24 so that when the collar 34 is in engagement
27 ! with the rear surface 36 of the barrel and the'forwardmost end
~8~ oL the plu ger 30 is in ontact with tlle rear end ~ the he~d
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of the pin, the piercing point 40 of the pin will protrude
slightly beyond the forward end 38 of the barrel 24 a~
suggested in Fig.3. By way of example, the piercing tip of
the pin 26 may protrude approximately one-sixteenth of an inch
beyond the forward end 38 of the barrel 24~ It is de~irable
to fabricate the plunger 30, collar 34 and rearward end 36 of
the barrel 24 so that the rear end of the barrel engages the
outermost region~ of the collar and provides little or no
support for the innermost collar region, where it joins the
plunger. This may be achieved by reducing the diameter of
the plunger 30 where it joins the collar and/or chamfering
the rearward end 36 of the barrel 24 as suggested at 41 in
Fig. 8. rhis increa~es the stress applied at the juncture
of the collar.and plunger.
The other of the jaws 18 is formed to define a
chuck, indicated generally by the reference character 42,
which ~s adapted to rec~ive and retain the lock nut 44. One
embodiment of the chuck 42, shown more clearly in Fig. 5 is
defined by a longitudinal ~lot 46 and a transverse, intersecting
slot 48 which receive ! respectively, the curled fingers 50
and the side flanges 52 of the lock nut 44 as shown. ~he
slots 46, 48 are dimensioned with respect to the portions of
the lock nut which they receive so that the lock nut may be
held lightly therein so that it will remain in the chuck until
it is withdrawn.after the piercing operation.. The bottom of the
longitudinal slot 46 i~ positioned longitudinally of the leg
1~ so that it will position the nut in axial alignment with
the pin, thus enabling the piercing point 40 of the pin to be
driven through the central hole in the lock nut and be locked
thereto by engagement of the end of the pin with the curled
fin~ers 50.
In use, the loaded device is held in a relaxed
configuration with its jaws being spread to receive an
earlobe. The earlobe, which typically has been marked to
highlight t-he intended piercing location then is aligned with
the forwardly protruding piercing point 40 of the pin 26.
The device, being ~ripped between the user's thumb and fore-
finger with his thumb bearing against the knob 32 of the
plunger 30, then is squeezed to grip the earlobe firmly.
The legs 10, 12 of the device are drawn together until the
pads 20, 22 abut each other which precludes further closure
of the jaws. It may b~ noted that the chuck 42 and forward
end 38 of the barrel 24 will then be in their most closed
position (Fi~. 3~, although still being spaced, or example,
approximately three-sixteenths of an inch. When closed thus
far the piercing point 40 depresses the relatively soft ear
lobe without piercing the skin.
The material and dimensions of the bight portion 14
preferably are selected in relation to the other dimensions
of the device as to require a squeezing force of approximately
one pound in order to bring the abutting surfaces 20, 22
together. The collar 34 is sufficiently strong to withstand
a one pound closure force without fracturing to enable complete
closure of the abutting surfaces 20, 22. The fracture strength
of the collar also is such that an increase to a predetermined
magnitude in the force which is applied to the collar of
(for example, three to four additional pounds) will cause
the collar 34 to rupture and separate from the plunger 30
which instantaneously shifts the force from the plunger to
the rear end of the pin head 28 which drives the pin instan-
taneously through the barrel 24`, piercing the earlobe and
into locking engagement with the locking nut. The grip on the
device then may be released to enable it to return to its relaxed
configuration under the spring influence of the bight portion
14. The parts of the device are dimensioned so that when
released, the forward end 38 of the barrel 24 will be withdrawn
rearwardly from the pin head 28. The device then may be re-
moved from the earloba by simply withdrawing it downwardly
; Xrom the earlobe to cause the lock nut 44 to be withdrawn from
the slots 46, 48,
Fig. 6 shows the manner in which the collar 34
fractures and separate~ from the plunger 30. The collar
engages the rear surface 36 of the barrel uniformly, and pre-
ferably about its peripheral margin, which causes the stressconcentration to ke applied to the collar at its juncture with
the plunger. The collar tends to fracture cleanly at this
juncture and separates as a complete ring. The portion 35 of the
plunger 30, which extends between the attached c~llar 34 and
the plunger head 32, may be ~f reduced diameter which is less
than the inner diameter of the separated collar so that it will
not interfere with forward movement of the plunger 30.
Fig. 7 shows an alternate form of abutting surfaces
20', 22' which, in~tead of being flat as descriked above are
of conYex and concave ~hape respectively. This configuration
insure~ that when the surface 20', 22' are brought together,
they will be in proper alignment when closed which, in turn,
insures that the pin 26 will be in precise alignment with the
hole in the lock nut 44. The convex, concave configuration
of the surfaces 20', 22' may take any of a variety of shapes
although the V-shape configurations shown are preferred. It
may be noted that any tendency for misalignment will be in
the lateral direction and for this reason the illustrated
configuration of mating ~urfaces 20', 22' are shown only as
being employed to inqure proper lateral alignment.
; As described abo~e, the pin 26 is retained in a
snug, but slidable fit within the barrel 24. This may be
achieved by a variety of configurations such as the one
discussed above in which the bore of the barrel is abricated
to clo~e tolerances with respect to the periphery of the pin
head. Fig~. 8 and 9 show an alternate technique in which
longitudinal ribs 54 are formed, and in circumferentially
spaced relation along the bore 56 of the barrel. The ribs
may define an inner circumference slightly smaller than that
defined by the external circumference of the pin head 28 while
the main intern~l diameter of the barrel bore 56 is larger than
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that of the pin head 28. The ribs 54 preferably are narrow
and should be sufficiently dimensioned to require approximately
a few ounces of axial thrust on the pin to advance the pin past
the ribs. It may be noted that the ribs 54 need not extend
: fully along the length of the bore S6 but may be limited in
length, as long as they engage and hold the pin head within
the bore. As shown in Fig. 10 the ribs 54~ may be extended
rearwardly in the bore 56 so that they may also engage the
forward most inner end 58 of the plunger 30 to also retain
it in place in the preassembled device~ ~hen this latter
configuration is employed it is desirable that the various
paxts be dimensioned and designed so that it will take less
force to drive the plunger through the bore than that required
for the pin.
~; In still another modification of the invention.
manufacturin~ tolerances in the fit of the pin head, bore and
plunger may be relaxed and these parts may be retained together
by a nonreactive grease~
Fig. 11 shows an alternate construction for the
rupturable member of the pin driving mechanism. In this
embodiment, the barrel 24 includes one or more internal pro-
jections 60 which extend into the bore to obstruct the passage
of the forward end of the pin head 28. The obstructions 60
are of dimenAion and design as to retain the pin while the
jaw9 of the device are closing and to thereafter fracture when
~ufficient axial force is exerted on the plunger to thereby
free immediately the pin for movement and enable the axial
i7~
force of the plunger to drive the pin through the earlobe. The
projection may take a variety of configurations such as a thin
circular flange or one or more individual projections. In this
embodiment the plunger does not have the fracturable collar 34
as it is not needed.
Figs. 12-17 show still further modifications which
may be employed in the invention. The abutting surfaces may
be formed by providing one of the abutting pads 62 with a pair
of projections 66, 68 and the other pad 64 with a pair of
sockets 70, 72 receptive to the projections. The projections
; may be spaced heightwise of each other and as shown in Fig. 15
are al80 ~paced laterally of each other. The inwardly extending
~urfaces 74, 76 of each of the projections defines an inclined
configuration which, when they mate with the corresponding
receptive sockets 70, 72 on the other abutting pad guide the
pads together and into proper lateral orientation with respect
to each other. The inclined surfaces 74, 76 of the projections
66, 68 may be conical, as shown, or may take other configurations
to effect the same ~unction, that of bringing the legs 10, 12
into progressive lateral alignment in response to movement
of the legs toward each other. In some instances it may ke
desirable to provide each pad with one projection and one
socket which will mate with a corresponding socket and projection
on the other abutting pad.
~ urther modifications may be made to the nut-holding
chuck 42'. As shown in Figs. 12-17, the lateral slot 48' may
extend
11~118/701 ,' , 10647~4
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l ,I downwardly beyond the bottom o-f the longitudinal slot 78 to en-
2 11 hance slightly the flexib'ility of the upwardly extending finger
3 1¦ 80 defined by the transver'se slot 48' and which is intended to
4 11 engage the backside of the earlobe. The enhanced flexibility of
5 li the finger 80 enables the width of the transverse slot ~8' to
6 !1 be made sufficiently small so that it may effect a sufficient
7 l¦ grip on the lateral flanges of the nut but will flex sufficiently I
8 1 to permit easy separation of the nut from the chuck 42' after
~, ~ the piercing operation ha~ been completed. Removal of the nut 1,
10 , from the chuck may be further enhanced by providi~g a chamfer on
~i ll j the portions 82 o-f the chuck as suggested in phantom at 8~ in
1 12 1 FIGS. 12 and 14.
13 1 A' further,modification may be made to the finger 80 as
14 ¦ ,can be,'seen from FIGS. 12, 15 and 17. ~lere the depth of the
longitudinal slot 78 in the finger 80 is just slightly below the
- ~ 16 axis of the pin so that the pin may just pass over the bottom of
, 17 1 that portion 78' of the slot 78. Further, the width of the slot
., . .
- 18 1 78' i~ the finger 80 is less than the width of the portion 78 of
19 1 the longitudinal slot ~ that it may be sufficiently wide to re-
'20 ,l ceive the pin without interference. By reducing the dimensions
21 ¦1 of the opening of the slot 78' in the finger portion 80, the
22 il chances of the skin at' the rear surface of the earlobe being
23 ¦¦ caught and pinched between the pin and the nut in the finger 80
2~ ~ is significantly reduced.
25 l~ The embodiment shown in FIGS. 18 to 21 inclusive, is
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1 ~particularly designed for commercial production. A number of
2 ~the structural features are common or s,imilar in arrangement and
3 function to those described in previously 'described embodiments
4 and, in particular, to FIG. 12. The preferred unit includes legs
210 and 21~ interconnected by bight 214. I`he upper end of the
6 legs 210 and 212 form jaws 216 and 218. The barrel 224 is inte-
7 grall~ formed with jaw 2I6. The barrel is preferably at least
,8 partially transparent so that the operator of the device can
9 observe movement of the pin toward the earlobe. A chuck 242
10 lS integrally formed with jaw 218. The U-shaped member may be
11 ! formed'with recessed portions on the faces of the legs to
12 ¦reduce the amount of material incorporated into the ear piercer.
13 I The barrel 224 is formed with a boss 225 on its inner
14 surface. This boss 225 is preferably an elongated projection
15 , ¦ with tapered ends '226. The boss 225 is'designed to frictionally
16 ¦ engag~ the sidewall of the head 228 of a pin with a friction fit
17 of a force in the order of magnitude of one or two pounds. The
18 ~ ¦ barrel 224 and/or the boss 225 can be resiliently distorted or
19 ~ displaced to allow the pin to pass down ~he barrel when a force
~0 ~ sufficient to overcome the frictional engagement is applied to
21 the end of the pin.
22 The plunger 230 includes enlarged knob 231 at one end,(~G.20'
23 The other end includes a ram 232 that abuts the head of the pin
24 within the barreL when the plunger is in its normal position.
25 ~ The plunger 230 is maintained in a normal position by the
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1 Ifrictional engagement of-projection 235. Projection 235 is
2 Ismall,in the order of magnitude of .01",for~a ram having a
3 diameter of .165. This projection is designed to provide
4 'sufficient frictional interference to assure that plunger 230
will remain in barrel 224 when loaded, but will not interfere
6 with the frictional movement of the plunger' as hèreinbefore
7 described. Flanges or collars 233 and 234 extend radially from
8 the plunger. These collars are positioned longitudinally in
respect to the extreme end of ram 232 so that the engagement of
collars 233 and 234 with the end'236 of barrel 224 will locate
the extreme~end of ram 232 adjacent the head of the pin secured
12 by boss 225. The collars 233 are integral with the plunger and
13 are dimensione'd so that approximately S to l0 pounds, and
14 'preferably 9 pounds, of force exerted against the collars
lS will cause them to shear o~f when the plunger is pushad into
16 the barrel. I~ has been determined that greater control or
17 uniformity may be attained by making collars as described~
18 The chuck 242 is designed to':hold a nut lightly in position
against inadvertent dislocation during handling and prior to
shipment. The chuck includes a plurality of fingers 243A and
21 243B, and 244A and 244~. The legs are defined by orthogonally
22 related slots 245 and 246. One side 246A of slot 246 is wider
23 than side 246B so as to limit insertion of a nut in one position
24 ¦only as illustratèd in dotted outline at 250. Legs 244A and
244B may be connected by a web 251 which e~tends preferably the
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1 1¦ depth of slot 246. An enlarged opening 247, extending across the
2 ¦¦ chuck 242 at the bottom of slot 245 causes legs 243A and 243B to
3 have a spring-like function. A cap 254 covers the web 251 and
- simulates a button. This cap is preferably grooved-to provide a
friction surface that is'more readily engaged by the operator's
6 finger. Jaws 216 and 218 respectively, are provided wlth facing
7 l~ and projecting lands 220 and 222. These lands are aligned and
8 ¦ shaped to engage and thereby limit closing movement of the jaws.
, ¦ Bosses 268 and 260 on lan~ 220 are aligned with complementary~
recesses 272 and 270 in land 222 to assist in properly aligning
; 11 ¦ the jaws upon closing. Boss 260 is formed adjacent one side and
, 12 1 boss 268 adjacent the other side of jaw 220.
13 I Further modifications may be made to the manner in which
14 ¦¦ the pin and/or plunger are retained within the bore of the barrel
¦ in readiness for use, ~s an alternate to the ribs described
16 previously, the surface,of the barrel may be provided with a very
, slight projection, of the order of a few thousandths of an inch.
18 This may be achieved by molding such projection directly onto the
19 1 surface of the barreI bore or in some instances a slight pro-
, 20 ~I jection may be achieved by merely scratching or blemishing the
21 inner surface of the bore which may roughen it slightly. The
22 blemishes should, of course, be located on the bore so that they
23 will engage the pin and/or plunger respectively in a position
24 ¦¦ ready for use.
¦ One feature of the pre-sent invention comprises an arrange-
26 1 ment for piercing an earlobe with a headed pin and securing the
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pointed end of the pin to a nut positioned on the side of the
2 ¦1 lobe opposite the pin. This arrangement includes a means for
3 1l positioning the pln on one side of the lobe and the nut on the
4 1l other. Means are provided for retaining the pin and nut in
¦¦ spaced relative positions against forces over a range from a ll
6 ¦! first force to a second force of substantially greater magnitude ¦
7 !l than the first. Upon application of a force in excess of the
8 1, second force the pin is abruptly released from its spaced relative
9 I position and is driven through the lobe and into engagement with ¦
I the nut. Means are also provided for releasing both the pin and
nut from the arrangement when in said engaged position. The
12 il specific means for abruptly releasing the pin may vary and may
13 !1 include such elements as a deformable or movable detent, although
14 ¦! a frangible or breaking element such as the collar arrangement
1 previously described is preferred. In preferred embodiments
16 1 forces may be applied either directly to the pin or to means for
17 ¦ applying forces to the pin in an order of magnitude less than
said first force without driving the pin through the lobe.
19 il The invention is particularly suited for low cost pro-
~ duction and may be easily preassembled with the pin and nut and
21 ! then be packaged in sterilized condition so that it may be ready
22 ¦¦ for use immediately when desired. It avoids the need for sepa-
23 Ij rate preliminary sterilization steps and other procedures which
24 j, have heretofore been an inherent part of the earlobe piercing
1i surgical procedur~e. The self-destructing feature of the in-
26 ,~ vention insures sterility in that once used the device cannot be
27 ! reused.
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1 1.. It should be understood that the foregoing description
2 11 of the invention is intended merely to be illustrative thereof,
3 ¦ and that other modifications and embodiments may be apparent
4 j to those skilled in the art without departing from its spirit.
5 ¦1 ~aving thus described the invention, wnat I desire to
6 ¦¦ claim and secure by Letters Patent is:
11 . .
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