Abstract:
The invention of the present disposable adjustable lancet involves an assembly which has a body and a cap. A lancet holder fits in the body and has a base portion having a pair of upstanding retainer-disabling tines, one of the tines is longer than the other to block the reinsertion of the lancet. A selector tip assists in engaging a clicker position in the selector tip. The method involves selecting positions by means of a female and a male position clicker which provide an audible signal. The position of the lancet can be determined in three manners: visually observing the degree of rotation, audibly denoting the click, and physically rotating the member which, in turn, results in a reaction on the finger while the adjustment is being made.

Description:
FIELD OF THE INVENTION 
   The present invention relates to lancets which are used to penetrate the skin in order to draw blood samples. Quite often they are used on a daily basis by diabetics. They are use on a regular basis on newborn infants. 
   BACKGROUND OF THE INVENTION 
   Lancing devices of various shapes and forms have been known in the art for years. Examples of such lancets are marketed as ProCare LLC. and also by Owen Mumford and Surgilance. Such lancets may be disposable, or they may require replacement of the lancet in a semi-permanent body portion. 
   Important to the operation of a lancet is developing a known depth of penetration into the skin which can be held within very minute tolerances. In many instances, it is important that lancets be disposable. There is a great need for disposable lancets which have an adjustable depth. In addition, such lancets require the utilization of a needle or a blade, depending upon the application. For example, blade type lancets are used with newborn infants and for pediatric purposes. The penetration is less painful, and to a depth not necessarily needed with the mature person and the mature skin. 
   SUMMARY OF THE INVENTION 
   The invention of the present disposable adjustable lancet involves an assembly which has a body and a cap. Ideally the two items are square in cross-sectional configuration. At one end of the body provision is made for a lancet holder. The lancet holder includes a lancet barrel portion, a follower for the adjustable support member, and a needle stop which ensures the extent of penetration of the needle. 
   The lancet also involves a cylindrical body portion used in combination with a coil spring. At the base of the unit is a lancet holder. The lancet holder has a base portion, and extending from the base portion are a pair of upstanding retainer-disabling tines, one of the tines being longer than the other. At the end of each tine, remote from the base, a pair of offset latches are provided to retain the lancet on the cocked position. 
   Finally, the selector tip is secured at the upper portion of the body and is provided with an internal helical cam segment or arc which engages a follower on the plunger unit. In addition, the selector tip utilizes a pair of opposed male detents which assist in engaging the female clicker position in the selector tip. 
   The method of the present invention involves the combining of members for an adjustable lancet in which provision is made for a minimum of two positions of depth. Three positions are considered optional considering size and the fact that two versions are offered. The multiple positions of depth are achieved through the interaction of a cam in the form of an interrupted helix segment or arc and the follower which moves the base member upwardly and downwardly. The selecting positions by means of a female and a male position clicker provide an audible signal so the position of the lancet can be determined in three manners: visually observing the degree of rotation, audibly denoting the click, and physically rotating the member to go to the various positions of the support which, in turn, results in a reaction on the finger while the adjustment is being made to determine the depth of penetration. 
   In view of the foregoing it is a principal object of the present invention to provide an adjustable multi-depth position, one use, disposable lancet. 
   Another object of the present invention is to provide an adjustable multi-depth position lancet with positive depth verification provided by a coordination between the extent of the penetration of the needle and a stop in the lancet body itself. 
   Yet another object of the present invention is to ensure that an audible click is generated in the moving of the lancet control to the different depth positions. While two or more depths are the subject of this invention, it is disclosed with three separate depths which are variated in accordance with accepted laboratory and medical standards. 
   Yet another object of the present invention is to provide the subject lancet with a finger sensitive position, a square body which resists slippage in adjustment, a round adjuster so that by feeling with both the body and the adjuster the depth setting can be differentiated without a visual reminder. The cap portion is provided in a square which can be positioned in any position, but will not position itself for purposes of recocking and recharging the lancet. 
   A significant objective of the invention is to be disposable, and that is achieved through a construction which blocks any reloading of the lancet after the lancet has been discharged from its original cocked position. 
   Finally, it is a major object of the present invention to be cost effectively competitive with pre-existing lancets which do not afford the advantages of adjustability, multiple depth positions, disposability, positive depth verification and audio-visual adjustable control. 

   
     DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS 
     Further objects and advantages of the present invention will become apparent as the following description proceeds, taken in conjunction with the accompanying illustrative drawings in which: 
       FIG. 1  is a perspective opened view of a prior art lancing device; 
       FIG. 2  shows the prior art lancing device with the left hand twisting off the lance device cover; 
       FIG. 3  discloses the insertion of the new lancet firmly into the lancet carrier; 
       FIG. 4  shows the left hand twisting off the lancet disk cover from the lancet; 
       FIG. 5  shows replacing the lancet cover; 
       FIG. 6  shows the left hand adjusting the comfort tip to one of the levels shown in the numerical indicia; 
       FIG. 7  shows the pulling of the lancet cover into the cocked position; 
       FIG. 8  shows the position of the adjustable comfort tip against the tip of the finger when the trigger button is then activated and the lancing completed; 
       FIGS. 9A and 9B  are a composite view of the illustrative disposable adjustable lancet showing in front elevation the adjustment indicia in FIG.  9 A and showing a side view of the same unit in  FIG. 9B ; 
       FIG. 10  is an exploded partially broken view in perspective of the lancet shown in  FIG. 9 ; 
       FIG. 11  is a perspective partially broken view in smaller scale than  FIG. 10  showing the lancet from the opposite end; 
       FIG. 12  is a diagrammatic sequential view showing the first step in usage by pulling off the cap; 
       FIG. 13  is a subsequent view showing the lancet placed in position on a finger for pricking the finger; 
       FIG. 14  is a view subsequent of that  FIG. 13  showing compressing the lancet against the finger to activate the needle; 
       FIG. 15  is an exploded perspective view sequentially showing the seven elements which make up the adjustable disposable lancet; 
       FIG. 16  is a composite perspective view comparable to that shown in  FIG. 15  but with the perspective taken from a different advantage point in showing the elements of  FIG. 15  in greater detail; 
       FIG. 17  is a transverse sectional view of the lancet in its original condition as it arrives into the patient&#39;s possession, with the lancet in place and cocked and ready for use; 
       FIG. 18  shows the same lancet as in  FIG. 17  but after the needle has been discharged and extended to its full penetration to a depth predetermined by the end support; 
       FIG. 19  is yet a further sequential view showing the lancet fully retracted after being discharged, as shown in  FIG. 18 , with the spring being in tension rather than compression as shown in  FIG. 17  whereby withdrawing the lancet from its position outside the adjustable body; and 
       FIG. 20  is a final view sequential to  FIG. 19  showing the coil spring cutaway and illustrating how the tine, which is the longer length and angled at its remote end, prevents the reinsertion of the lancet into the cocked position for reuse, thereafter dictating disposal by the user. 
       FIG. 21  is an enlarged diagrammatic view taken at  21 — 21  of FIG.  20 . 
   

   DESCRIPTION OF A TYPICAL PRIOR ART LANCET 
   A typical prior art lancet is shown in FIG.  1 . There will be seen lancet device  1  and an adjustable comfort tip  3 . A cover needle cap is included in the comfort tip. The needle cap or disk  4  permits the lancet  6  to project the needle  5  after the cover has been removed, and activated by the trigger  8  to penetrate the epidermis. 
   More specifically, as shown in  FIGS. 2 through 8 , the first step is to twist off the lancing device the needle cap  4 . Thereafter, a new lancet  6  is inserted into the lancet carrier. Subsequently, the needle cap is removed, revealing the needle ready for use. After which the lancing device needle cap is replaced on the lancing device. 
   At this point the comfort tip is rotated to adjust the same to the numerical indicia appearing opposite the arrow  7  thereon to determine the depth of the intended penetration. Once this adjustment has been completed, the needle cap  4  is separated from the barrel  2  thereby cocking the internal spring (not shown) in order to penetratingly drive the lancet needle into the finger. Finally, as shown in  FIG. 8 , the lancet device  1  is pressed against the finger, the trigger  8  activated, and the penetration of the finger is achieved. From here on out the patient squeezes a sufficient amount of blood on to a testing substrate, and the testing is completed in accordance with the prescribed protocol being followed. 
   DESCRIPTION OF THE PREFERRED EMBODIMENT 
   The general construction of the preferred embodiment appears in  FIGS. 9A and 9B . There it will be seen that the adjustable disposable lancet  10  has a body portion  11  with a protective cap  12  having an internal needle protector  13  secured over the end. The selector tip  18  ( FIG. 9B ) is rotated until the depth positioning pointer  25  identifies the particular depth preselected. The selector tip  18  has a needle opening  19  which receives the needle  21  of the lancet  20 . 
   The side view of  FIG. 9B  does not show the printed indicia or the pointer and it will be seen that the bottom end is uninterrupted. 
   As shown in  FIG. 10 , the contact pad  29  is on the end of the selector tip  18 . The indicia is preselected by the depth positioning pointer  25  and the depth numbering  26  is shown on top of the body of the adjustable disposable lancet  10 . 
     FIG. 11  is a reverse view of that shown in  FIG. 10 , differing only in that it does show the bottom to be uninterrupted. 
   In usage, the adjustable disposable lancet  10  is quite simplistic. As shown in  FIGS. 12-13 , the protective cap  12  is first removed from the adjustable disposable lancet  10 . Thereafter, the selector tip  18  is rotated until the preselected notch is identified by the depth positioning pointer  25 . The depth numbering  26  is employed as a guide, but it is actually the depth positioning pointer  25  which identifies the position notches  28  on the dial  51 . 
   The specific structure is shown in exploded perspective in FIG.  15 . Beginning at the lower left hand corner of  FIG. 15  it will be seen that the protective cap  12  is positioned over the selector tip  18 . In turn, the selector tip  18  fits within the body portion  11 . The body portion  11 , as shown, has an extended depth positioning pointer  25  which will be described hereinafter. The depth positioning pointer  25  extends from the body portion  11 . The selector tip  18  receives the lancet  20  from which the needle  21  extends at one end. Spaced from the needle is the locking ring  23  which helps the securement of biasing means comprising the coil spring  15  at one of its ends  16  to the lancet  20 . The lower spring end  16  of the coil spring  15  is positioned to coaxially engage the disabling tines  45 . The latch means or latches  44  are opposed and engage the spring lock groove  22  defined by the locking ring  23  of the lancet  20 . As to the disabling tines  45 , it will be noted that there is a long tine tip  45  and a short tine tip  46 . The longer of the tines tip  45 , particularly as shown in  FIG. 20 , has its end cocked slightly inwardly, as will be described hereinafter. The space  38  between the tines  45 ,  45  comprises guide means for the lancet  20 . 
   In greater detail, as to the specific structure which dictates the function and method of the subject adjustable disposable lancet,  FIG. 16  shows the principal elements of  FIG. 15  but in great detail. The details will be described proceeding from the selector tip  18  which appears in the upper right-hand corner of  FIG. 16 , downwardly through the depth positioning pointer  25 , and thereafter to the lancet  20 , and finally the mounting of the lancet  20  in the lancet holder  40 . More specifically, it will be seen that the selector tip  18  has a plurality of selector knobs  56  underneath the contact pad  29 . These selector knobs  56  are proportioned to click into the mating selector grooves  58  located in the depth positioning pointer  25  which is shown immediately beneath the selector tip  18  in FIG.  16 . In addition, the action of a cam and follower comprising means interconnecting between the barrel and selector tip for adjusting the total length of the barrel, and selector tip includes the bayonet type helical recess  60  located in the lower barrel portion  61  of the selector tip  18  and the co-action between the cam follower pin  31  when it enters the slot of the bayonet type helix  60  moves the contact pad  29  upwardly or downwardly between the three positions. In so moving, the selector knobs  56  will selectively engage the recessed selector grooves  58  and in the process not only lockingly and removably securing the selector tip  18  internally of the depth positioning pointer  25  but also emitting an audible click each time the contact pad  29  is rotated between the three positions selected. 
   The specific details will be better understood now as we sequence through  FIGS. 17 ,  18 ,  19  and  20 . Beginning with  FIG. 17 , it shows the adjustable disposable lancet  10  as received by the user, with the protective cap  12  removed since the cap does figure into the action but rather serves to protect and enclose the unit for shipment, storage in the clinical facility, and sterility until actual use. As seen in  FIG. 17 , prior to usage the lancet needle  21  and lancet  20  are lockingly engaged by the disabling tines  45 ,  45  and more specifically the tine tips  46 ,  49  at the end portion of the disabling tines  45 ,  45 . In accordance with the invention, it will be noted that one of the tines  45  is longer than the other tine  45 . This tine length differential structure eliminates the possibility of re-inserting the lancet correctly after a single use, thereby comprising means for preventing recocking of the lancet  20  after it has been fired. Therefore, it will be seen that in  FIG. 17  the contact pad  29 , at the lower portion 
     FIG. 18  shows the lancet in the fully extended position, at which time the coil spring  15  has gone from the compression mode as shown in  FIG. 17  to a tension mode as shown in FIG.  18 . It will be appreciated that this modal change of the coil spring  15  is virtually instantaneous and not observable. Nonetheless the coil spring  15  is so formed proportioned and of a metallic specification that permits the employment in a compression, as well as tension mode. At the time of the total penetration of the lancet needle  21 , as shown in  FIG. 18 , it will be seen that the tines  45  and  45  in the lancet holder  40  are spread apart defining a tine slot  38 , but the longer tine  45  has an offset in-portion which will be described hereinafter. 
   Turning now to  FIG. 19 , this is the configuration as the lancet  20  and its associated needle  21  is retracted during the after firing tension mode of the coil spring  15 . As will be seen, the spring pulls on the groove  22  on the lancet  20  to yieldably urge the lancet  20  back into position in the tine slot  38  on the two disabling tines  45 ,  45 . 
   As shown in  FIG. 20 , any return to a re-cocked position is frustrated by the long tine tip  45  and more particularly its end which is curved centrally, and therefore engages any portion of the I-beam like construction  36  of the lancet  20  which might try to bring the lancet base back between the tines  45 ,  45  in the tine slot  38  to the firing configuration, as shown in FIG.  17 . In this fashion the lancet is prevented or frustrated from being repositioned over the tine members  45 ,  45 , and reused. lockingly engaging the I-beam like construction  36  base of the lancet  20  in a pair of latches  44 , and centrally positioning adjacent a pair of support tines extending upwardly from the base  41  of the lancet holder  40 . Important to the invention is providing a latching means for the lancet in which the latching is conducted primarily by a pair of opposed locking and disabling tines. One of the tines  45  is longer than the other tine  45 . This permits one of the longer tines  45  to be curved centrally so that upon the potential return of the lancet, that particular tine will engage the lancet much as shown  FIG. 20  of the accompanying drawings. A dotted circle has been set on the position on  FIG. 20 , and  FIG. 21  is a showing, in enlarged relatively diagrammatic form, how the longer of the tines  45  has its bent tip  49  and the same engages any lower portion of the lancet  20 . The sequence of the method involves pre-selectively assembling all of the members at the factory site, and in such a fashion that the lancet  20  is cocked for usage, primarily as shown in FIG.  17 . Thereafter the lancet contact pad  29  is rotatably adjusted to a predetermined position of the selector  50  which has selector knobs  56  which engage selector grooves  58  respectively on the selector tip  18  and inside of the lancet barrel- 30  to thereby determine the extent to which the contact pad  29  extends from the main body portion of the disposable lancet. As set forth hereinabove, it is the utilization of the contact pad  29  by its spacial relationship from the balance of the unit which determines the extent of penetration of the lancet needle. The lancet needle  21  and the lancet  20  are always positioned in exactly the same location relative to the adjustable disposable lancet  10 . More specifically, the body and all other elements are fixed. The depth numbering  26  indicates the extent to which the lancet body will be moved when it is fired, as shown in FIG.  18 . No other element of the unit determines this position other than in their coordinated and cooperative relationship each to the other. The space  38  between the tines  45 ,  45  comprises guide means for the lancet  20 , comprising means interconnecting between the barrel and selector tip for adjusting the total length of the barrel, and selector tip includes 
   Also, in accordance with the invention, provision is made for a needle travel stop  32 . The needle travel stop  32  is important in that it stops the penetration of the lancet  20  at a given point relative to the depth positioning pointer  25 . As described earlier, the extent of penetration of the needle  20  is not a function of the positioning of the lancet. The lancet always positively engages the slide needle travel stop  32  and it is therefore the position of the selector tip  18  and it associated contact pad  29  that determine the penetration of the needle when the lancet is fired. 
   Turning now to  FIG. 16 , it will be seen that lancet barrel  30  houses the follower pin  31  and includes a needle travel stop  32 , shown in phantom lines towards the upper portion of the barrel  30 . Detents  34  are provided inside the barrel  30 . 
   Continuing now, we skip to the lancet holder  40 . As shown, the lancet holder  40  has a base portion  41 . In addition, the lancet holder base  41  has basically an I-beam like construction  36  which permits it to be oriented into the lancet holder  40 , as will be described hereinafter. The lancet holder  40  includes a pair of opposed latches identified as reference numeral  44 . These latches  44  co-act with the locking ring  23  on the lancet  20  and co-act with the coil spring  15  in the compressed configuration when the lancet is set to fire. 
   The specific details will be better understood now as we sequence through  FIGS. 17 ,  18 ,  19  and  20 . Beginning with  FIG. 17 , it shows the adjustable disposable lancet  10  as received by the user, with the protective cap  12  removed since the cap does figure into the action but rather serves to protect and enclose the unit for shipment, storage in the clinical facility, and sterility until actual use. As seen in  FIG. 17 , prior to usage the lancet needle  21  and lancet  20  are lockingly engaged by the disabling tines  46  and more specifically the tine tips  48 , 49  at the end portion of the disabling tines  46 . In accordance with the, invention, it will be noted that one of the tines  46  is longer than the other tine  45 . This tine length differential structure thereby comprising means for preventing recocking of the lancet  20  after it has been fired. Therefore, it will be seen that in  FIG. 17  the contact pad  29 , at the lower portions thereof, is positioned with respect to the holder body by means of the position of the helix  55  and the helical engaging cam follows pin  31 . 
     FIG. 18  shows the lancet in the fully extended position, at which time the coil spring  15  has gone from the compression mode as shown in  FIG. 17  to a tension mode as shown in FIG.  18 . It will be appreciated that this modal change of the coil spring  15  is virtually instantaneous and not observable. Nonetheless the coil spring  15  is so formed proportioned and of a metallic specification that permits the employment in a compression as well as tension mode. At the time of the total penetration of the, lancet needle  21 , as shown in  FIG. 18 , it will beseem that the tines, 45  and  46  in the lancet holder  40  are spread apart defining a tine slot  38 , but the longer tine  45  has an offset in-portion which will be described hereinafter. 
   Turning now to  FIG. 19 , this is the configuration as the lancet  20  and its associated needle  21  is retracted during the after firing tension mode of the coil spring  15 . As will be seen, the spring pulls on the groove  22  on the lancet  20  to yieldably urge the lancet  20  back into position in the tine slot  38  on the two disabling tines  46 . 
   As shown in  FIG. 20 , any return to a re-cocked position is frustrated by the long tine tip  46  and more particularly its end which is curved centrally, and therefore engages any portion of the I-beam like construction  36  of the lancet  20  which might try to bring the lancet base back between the tines  45 , 46  in the tine slot  38  to the firing configuration, as shown in FIG.  17 . In this fashion the lancet is prevented or frustrated from being repositioned over the tine members  45 , and reused. 
   The Method 
   The method of the present invention involves the constraint of a lancet interiorly of a disposable lancet device. The sequence of the disposition of the lancet involves positioning a spring coaxially around the lancet base, and thereafter lockingly engaging the I-beam like construction  36  base of the lancet  20  in a pair of latches  44 , and centrally positioning adjacent a pair of support tines extending upwardly from the base  41  of the lancet holder  40 . Important to the invention is providing a latching means for the lancet in which the latching is conducted primarily by a pair of opposed locking and disabling tines. One of the tines  46  is longer than the other tine  45  This permits one of the longer tines  46  to be curved centrally so that upon the potential return of the lancet, that particular tine will engage the lancet much as shown  FIG. 20  of the accompanying drawings. A dotted circle has been set on the position on  FIG. 20 , and  FIG. 21  is a showing, in enlarged relatively diagrammatic form, how the longer of the tines  45  has its bent tip  49  and the same engages any lower portion of the lancet  20 . The sequence of the method involves pre-selectively assembling all of the members at the factory site, and in such a fashion that the lancet  20  is cocked for usage, primarily as shown in FIG.  17 . Thereafter the lancet contact pad  29  is rotatably adjusted to a predetermined position of the selector  50  which has selector knobs  56  which engage selector grooves  58  respectively on the selector tip  18  and inside of the lancet barrel  30  to thereby determine the extent to which the contact pad  29  extends from the main body portion of the disposable lancet. As set forth hereinabove, it is the utilization of the contact pad  29  by its spacial relationship from the balance of the unit which determines the extent of penetration of the lancet needle. The lancet needle  21  and the lancet  20  are always positioned in exactly the same location relative to the adjustable disposable lancet  10 . More specifically, the body and all other elements are fixed. The depth numbering  26  indicates the extent to which the lancet body will be moved when it is fired, as shown in FIG.  18 . No other element of the unit determines this position other than in their coordinated and cooperative relationship each to the other. 
   SUMMARY 
   In summary, what has been shown and described is an adjustable disposable lancet  10 . Also shown and described is a method of utilization of an adjustable disposable lancet. While the method is dictated to a degree by the apparatus, the apparatus is also dictated by the method. In that respect, the method is specific to the utilization of the pad portion of a disposable lancet which contacts the body to determine the extent to which the lancet needle penetrates. Conversely, the structure of the body is such as to have a holding means for the lancet which has one end portion in interference relationship with the base of the lancet. Due to the interference relationship, while the lancet is properly oriented on top of the holding tines with the spring in compression prior to usage, once the lancet has been fired the holding tines will return to their original configuration with the longer of those tines  46  extending centrally  49  to thereby block any attempt to return the lancet to a cocked position. 
   It will be understood that various changes in the details, materials and arrangements of parts, or method which have been herein described and illustrated in order to explain the nature of the invention, may be made by those skilled in the art within the principle and scope of the invention as expressed in the appended claims. 
   
     
       
             
           
             
             
             
             
             
           
         
             
                 
             
             
               PARTS LIST 
             
             
                 
             
           
           
             
                 
             
           
        
         
             
               00 
                 
               34 
               DETENT (FEMALE) 
                68 
             
             
               01 
               LANCET DEVICE 
               35 
                 
                69 
             
             
               02 
               BARREL 
               36 
               I-BEAM LIKE 
                70 
             
             
                 
                 
                 
               CONSTRUCTION 
             
             
               03 
               ADJUSTABLE 
               37 
                 
                71 
             
             
                 
               COMFORT 
             
             
                 
               TIP 
             
             
               04 
               NEEDLE CAP OR DISK 
               38 
               TINE SLOT 
                72 
             
             
               05 
               NEEDLE 
               39 
                 
                73 
             
             
               06 
               LANCET 
               40 
               LANCET HOLDER 
                74 
             
             
               07 
               ARROW 
               41 
               LANCET HOLDER BASE 
                75 
             
             
               08 
               TRIGGER 
               42 
                 
                76 
             
             
               09 
                 
               43 
                 
                77 
             
             
               10 
               ADJUSTABLE 
               44 
               LATCH 
                78 
             
             
                 
               DISPOSABLE 
             
             
                 
               LANCET 
             
             
               11 
               BODY 
               45 
               DISABLING TINES 
                79 
             
             
               12 
               PROTECTIVE CAP 
               46 
               LONG TINE TIP 
                80 
             
             
               13 
               NEEDLE PROTECTOR 
               47 
                 
                81 
             
             
               14 
               STATUS PIN 
               48 
               SHORT TINE TIP 
                82 
             
             
               15 
               COIL SPRING 
               49 
               CENTRALLY CURVED 
                83 
             
             
                 
                 
                 
               TIP 
             
             
               16 
               SPRING END 
               50 
               SELECTOR 
                84 
             
             
               17 
                 
               51 
               DIAL 
                85 
             
             
               18 
               SELECTOR TIP 
               52 
                 
                86 
             
             
               19 
               NEEDLE OPENING 
               53 
                 
                87 
             
             
               20 
               LANCET 
               54 
                 
                88 
             
             
               21 
               LANCET NEEDLE 
               55 
               HELIX SEGMENT (CAM) 
                89 
             
             
               22 
               SPRING LOCK 
               56 
               SELECTOR KNOBS 
                90 
             
             
                 
               GROOVE (20) 
             
             
               23 
               LOCKING RING 
               57 
                 
                91 
             
             
               24 
                 
               58 
               SELECTOR GROOVE 
                92 
             
             
               25 
               DEPTH POSITIONING 
               59 
                 
                93 
             
             
                 
               POINTER 
             
             
               26 
               DEPTH NUMBERING 
               60 
               BAYONET TYPE HELIX 
                94 
             
             
               27 
                 
               61 
               LOWER BARREL 
                95 
             
             
                 
                 
                 
               PORTION 
             
             
               28 
               POSITION NOTCH 
               62 
                 
                96 
             
             
               29 
               CONTACT PAD 
               63 
                 
                97 
             
             
               30 
               LANCET BARREL 
               64 
                 
                98 
             
             
               31 
               PIN (FOLLOWER) 
               65 
                 
                99 
             
             
               32 
               NEEDLE TRAVEL STOP 
               66 
                 
               100 
             
             
               33 
                 
               67 
                 
               101