US1725177A - Syringe - Google Patents

Description

Aug. 20, 1929. C. E. BRE MIL@ 1,725,111

SYRINGE Filed VJun@ 17, 1925 Patented Aug. 20, 1929.

UNITED STA Tiasvl PATENT oFFic-E.

' l CLIFFORDiE. BRE 'MILIEBh 0F CHICAGO, ILLINOIS, ASSIGNOR TO COOK LABORATORIES,

. INC., A CORPORATION OF DELAWARE v SYBINGE.

Application 1ed June 17,

- mic'syringes, and aims to provide an improved hypodermic syringe of the cartridge type. More particularly my invention involves improvements over the prior l; art of breech loading cartridge syringes, features. of the invention being applicable however to cartridge syringes not necessarily of the breech-loading type. My invention further involves improvements in connection with such syringes embodying or employing the plugged tube type of cartridge, and furl ther the provision of Va'practicable and rel liable cartridge syringe for use with plugged 1926'. Serial No. 116,547.

said barrel by pivot pins 10 projecting from -l I opposite sides of the barrel near one end, Said pins extending into bayonet slots 11 formed in the linner faces of said'arms. The described construction provides means whereby the syringe head 6 may be swung about 'the end of the barrel 5 and 'may be disengaged therefrom when desired.

The syringe lunger rod 12 is carried by and movable t rough the hinged` syringe head 6 and is preferably slidable therein; At its outer end it is provided with an enlargement or handle 13 to facilitate pushing it inwardly during an injection; and on the tube cartridges in administering hypodermim syringe headthere is the usual 'finger bar 14 injections where high pressure isrequircd, as for instance -in administering intraosseous injections. *l

The invention may be understood by reference to one illustrative embodiment shown in the accompanying: drawings, in which: y

Fig. 1 is an elevation of the illustrative syringe; A

Fig. 2 is a longitudinal section-on an.en` larged scale, omitting portions of the instrument;

Fig.. 3 is a fragmentary view illustrating the opening of the syringe for refilling with a cartridge. -v

Fig. 4 is an enlarged sectionsubstantially on line 4 4 of Fig. 2;

Fig. 5 is a detail section showing the plunger rod engaged with the cartridge. clamping member; and

Fig 6 is an elevation of the clamping member. A

Referring to the drawings, there is shown aI cartridge syringe comprising a body, a medicament-containing cartridge held by the body, a needle or canula piercing one end of the cartridge and exemplifying an aseptic medicament conduit leading from the interior of the cartridgefto the point of injection, and a plunger movable longitudicartridge nally of the'syringe body forexpelling the medicament.

In` the illustrative construction, the syr inge lbody consists of two hinged` parts 5 and 6 relatively movable into 'and out of axial alinementso as to open the instrument at its breech end for insertion or with-- drawal of the cartridge 8, and for closing the instrument for operative use.4 The syringe head-6 has two arms 9 embracing the end of the barrelpart 5 and vconnected with which is used with .the handle during an injection, and in this instance is swiveledl on the syringe head.

In order to secure the hinged parts in alinement so that the plunger rod may eject the contents of the cartridge, a locking sleevel l5 is provided-'which is carried by the hinged head 6 and is projectible across the joint of the syringe so as to extend'within the open end of the barrel part 5. The locking sleeve is of sufiicient diameter ,to engage the rear end of the cartridge to clamp the same, as will bemore fully described, and it has an axial bore 16' to permit theplunger rod 12 to slide through it.

In order to manipulate the locking mem bei, it may be engaged by screw-threads 17 to the hinged head, as shown, and may loe provided with one or more recesses 18 to receive complementary projections 19 lextending laterally from; the plunger rod adjacent its innerenlarged end 20.` In this instance said locking member is recessed at its inner end to enclose the enlarged end 20- of the plunger rod, and the recesses 18 to be engaged by the projections 19'are formed at the baseof the main recess of said locking member. When the plunger rod is moved. backward as far as it will go, and

then turned, its projections 19 will move The cartridge shown comprises a tubular body such for instance as a glass tube having a slidable plug 21 sealing one end and a recessed plug 22 sealing its oppositeend, said recessed plug 22 being formed with a flange 23 overlying the end of the cartridge tube which is adjacent the canula 24. vWhen the locking sleeve is advanced into locking position, it will force the cartridge forward so that Iits fore sealing plug 22 will be pierced bythe canula and the'flange 23 of the plug will be clamped between the end of the cartridge tube and the inner surface of the front syringe-barrel head. Thus the car-A tridge is substantiallyT rigidly clamped between end abutments therefor, so as to prevent outward movement of the flanged plug 22 during the fluid-ejecting operation, by the driving forward of the plug 21 by the plunger, even though there be high pressur within the cartridge.

In actual practice, it is most convenient to use cut sections of glass tubing to provide the tubular cartridge bodies, and such sections are sometimes uneven at the eut surfaces; and due to this unevenness and the brittleness of glass, the butt end of the glass cartridge tube, if too tightly engaged by the locking member, may chip and break off, possibly preventing use of the cartridge.

` To eliminate any likelihood of breaking the cartridge, a slightly resilient washer 25 (Fig. 2) may be interposed between the butt end of the cartridge' tube andthe clamping member. The washer may be fast to either the cartridge or the clamping.v member, or

.may be separate from both; whether fast or loose, its `resiliency is sufficient to permit the heavy thrust of the clamping member to be transmitted to the end of the brittle car tridge body without danger of breakage.

It will be observed that the screw threaded llocking member 15 is not only usable to hold the -hinged parts of the syringe in alinemcnt and to clamp the cartridge, but may also greatly facilitate piercing of the cartridge, by advancing the cartridge against the point of a previously positioned canula.

The clamping functionl of the screw inember 15, whereby the cartridge is substantiallv rigidly clamped between said member and the abutment provided by the front head of the cartridge holding body or instrument, is advantageous to 4 resist relative displacement between the cartridge tube and itslfore sealing plug 22 during the fluid-ejecting operation, and especially when administering hypodermic injections underconditions where a high pressure is required, as for instance in making intraosseous injections. The high pressure imposed on the rear pis- V ton plug 21, and transmitted through the By virtue of the projections 20 of the plunger rod, engageable with the recesses 1S in the screw member 15, the plunger rod may be engaged with said screw member for operating the same' by rotation of the plunger rod, either for advancing the screw to lock the instrument and to thrust forward and clamp the cartridge, or for retracting the screw to unlock the instrument; while at the same time lthe plunger rod is freely 'slidable in said screw memberso that there is no interference with the independent operation `of the plunger rod to drive in the rear piston plug 21 and eject the fluid contents from the cartridge through the needle or canula piercing the fore cartridge plug. The operation of the screw by turning the plunger is convenient and, by virtue of the leverage obtained through the handle 13, enables the screw /to be readily screwed tight to clamp the cartridge with considerably greater pressure than could readily be applied if the screw had to be operated directly by engaging a finger piece thereon v binations and sub-combinations as defined in the claims. j

What I claim is:

` 1.4 A syringe ofthe class described comprising, in combination, a body; a medicament cartridge held by the body; a plunger rod for expelling the contents of the cartridge; and means operated by turning the plunger' rod for moving the cartridge longitudinally of the body.

2. A syringe-of the class described comprising, in combination, a body; a medicament cartridge held by the body; a plunger rod for expelling the contents of the cartridge; and a member at the plunger rod end of the syringe having means engageable by cooperative means on the plunger rod, and being advanced into the body by rotation of the plunger rod when engaged therewith so as to clamp the cartridge.

3. A syringe of the class described comprising, in combination, a body; a medicarod for expelling the contents of the cartridge; and a sleeve engaged by screw threads with the'syringe end which is opposite from the needle end, and having means for engagement with the plunger rod so that the plunger rod may be used to advance 1t within the syringe body to clamp the car.

f tridge in place.

4. A syringe of the class,described4 comrising in combination a-bod a medicament cartridge held by the body; a plunger rod for expelling the contents of-the car- `tridge; said plunger rod having a handle at the outer end; and a screw threaded sleeve t movable into the body from the plunger rod end thereof and engageable by the inner end of said plunger rod to effect rotation thereof to clamp the cartridge.

5. syringe of the class described comprising, 1n combination, a body; a medical the cartridge within the body until it is- Aprising, in combination, a body; a

ment cartridge held by the body;

ment cartridge held by the body; a lunger rodfor expelling the contents of t e cartridge; and means for moving the cartridge to clamp it within the body, said means eiigageable with the plunger rod end when the plungersrod is outermost to cause rotation" thereof on turning the plunger rod, and being disenga eable from `Vthel plunger rod by merely pus ing inwardly thereon.

6. A syringev of the class Idescribed comprising, in combination, a body;- a medicaa plunger rod .for expellin the contents of the cartridge; a screw-t readed sleeve for moving clamped, saidl sleeve haaving an internal recess; the plunger rod having a handle at its outer end and a lateral projection near its inner end', the projection being engageable atI will with the recess in the sleeve, soi

that the sleeve is easily` rotated by turning the syi'inge handle. Y

' A syringe of the class described, conip lunger rod movable longitudinally of the llibdy; a medicament container held by the body comprising. a tube having a picrceable sealy ing plug in its fore end and being constructed and arranged to have its interior volume reduced bythe plunger rod to expel the medicament; said body having an abutm'ent for saiddplug and means operable b the plunger'ro to move the container longitudinally of thle j stantially rigidly o'r non-yieldingly with said plug a ainst said abutment yso that the plug cannot e forced out by the hydrostatic pressure created within .the container duringan injection, .the plunger rod being engageable with said means to operate the same to clam the cartridge and being independentlyvsli able to operate said container.

8..A vsyringe of the class described comprising, in combination, a syringe body; a plunger rod slidable on the syringe body; a

medicament containing cartridge consisting I .41,55 of a cylindrical body;

a plug sealing one body and toelamp it sub end thereof' and' slidable therethrough and a flanged plug sealing the other end but not slidable, so that it may be pierced by the needle of the syringe without displacement;

and means operable turning the plunger rod to move the cartridge longitudinally of the syringe body and to clamp its flanged plug so-that said plug' is'not forced out by l a plunger rod carried by .the syringe head and slidable through said locking member; and inter-engaging means on the locking member and plunger rod so that said rod may move the locking member from inactive .to active position and vice versa.-

10. A syringe of the class described comprising, in combination a syringe body hav'- in a hinged head which, W en swung to one si e, exposes an opening in the bod a I nedicament containing'lcartridge hel by the body and insertible in and removable through said opening; 'needle securing means; a member carried by the hinged syringe head and projectable across the joint between the head and-the body of the syr inge to lock said parts in operative position;

said member being screw threaded in the syringe head .and having an axialbore; a plunger ro'd having a handle at its outer end and slida'ble through'the axial bore of the locking member; and means on the inner end of the plunger rod for connecting it to thelocking member toactuate the same.

1'1. A syringe comprising a-b`ody portion` A and .a head hinged` thereto, a plunger reciprocable with "res ct tosaid head, a member engaging said head and movable with respect thereto to lock said head in operative position 'with respect to said body portion, said member being apertured for pas' sage of said plunger, and means associated with'said plunger and member whereby they may be releasably rconnected so that said I member may be moved by the plunger'to and fromlocking position.

12. A syrin e comprising a body portionI and a head ingedly. attached thereto, a plunger, a. locking member threadedlyA engaging said head, said head and member being apertured for passage of. saidfplunger, said member being operable by said plunger to move into and 4out of osition locking said head in operative relation to said body portion. l

13. In a cartridge-syringe,l a ecartridge holding and operating instrument lhaving a cartridge-piercing canula at its fore endand a plunger in its breech end, said instrument constructed lto permit opening for insertion of the cartridge and embodying thrust means operable by the plunger to push against the butt end ofthe cartridge and-force it to its holding and operating instrument having a.

cartridge-piercing canula at its fore end and a plunger in its breech end, said instrument constructed to permit opening for insertion of the cartridge and embodying thrust ,means operable by the plunger to push against the butt end of the cartridge and force it to its forward-position, the plunger and thrust means having cooperative means whereby the thrust means may be operated by turning the plunger while the plunger is independently longitudinally movable to operate the cartridge.

15. In a cartridge-syringe, a plunger-carrying cartridge-holding and operating instrument embodying relatively longitudinallyK movable abutments for the fore and rear ends of the cartridge and'means operable by the plunger to cause a firm clamping of the cartridge by and between said end abutments, the plunger being connectable with said means for operating the same and releasabletherefrom to permit -independent operation of the plunger to operate the cartridge.

16. In a cartridge-syringe, a plungercarrying cartridge-holding and operating instrument embodying relatively longitudinally movable abutments for the fore and rear ends of the cartridge and Imeans operable by the plunger to cause a rm clamping of the cartridge by and between said end abutments, said means being operable by rotating the plunger and the plunger being independently longitudinally movable to operate the cartridge.

17. In a cartridge-syringe,- a cartridgeholder having a cartridge-piercing canula at its fore end and having a breech head displaceable to permit endwise insertion of the cartridge; a hollow screw mounted in said breech head and adapted to be screwed therein against the butt end of the cartridge to thrust it forward and insure piercing by the needle; and a cartridge-operating plunger engageable with said screw to operate the same and slidable in said screw to operate the cartridge.

18. In a cartridge syringe, a cartridgeholder having al hinged breech head, a hollow screw in said head cooperable with the body of the holder to lock the head in place, and adapted to 'be unscrewed to permit swinging the head laterally to allow endwise insertion of the cartridge; and a cartridgeoperating plunger slidable in said screw, said plunger and screw having cooperating means whereby the screw may be operated by ,turning the plunger.

19. In a cartridge-syringe, a jointed cartridge-holding and operatin g instrument having a cartridge-operating plunger and adapted to be opened for insertion of the 'cartridge and to be closed for operative use, said instrument comprising hinged or pivotallyconnected parts adapted to be relatively displaced for opening`the instrument and having an axially-adjustable locking screw, 4in

lwhich the plunger works, cooperable with the said parts to hold the instrument closed,

said screw and plunger having cooperable means by which the screw may be operated by the plunger.

20. In a cartridge-syringe, a breech-loading cartridge-holding and operating instrument, jointed to permit swinging its rear portion relative to its front portion for openingthe instrument to permit insertion or` withdrawal of the cartridge; said front portion embodying an -abutment for the -fore end of the cartridge. and adapted to accommodate a cartridge-piercing canula; and a hollow screw and plunger carried by said rear portion, said plunger freely slidable in said screw, and-the screw and plunger having cooperating means whereby the screw may be rotated by turning the plunger; said screw adapted to bridge the jointed parts of the instrument to lock the same in closed condition and to bear on the buttl endv of the cartridge and thrust it forwardagainst saidv abutment.

21. In a cartridge-syringe, a jointed cartridge-holding and operating instrument,-

Aadapted to be opened for introduction o fa cartridge and .to be closed for operative use,

said instrument embodying a cartridge-operat-ing plunger and an associated screw operable by the-plunger to lock the instrument In testimony whereof, I have signed my name to this specification.

CLIFFORD E.. BRE MILLERl

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