US2665687A

US2665687A - Syringe assembly

Info

Publication number: US2665687A
Application number: US177239A
Authority: US
Inventors: Frank E Brown
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-08-02
Filing date: 1950-08-02
Publication date: 1954-01-12
Anticipated expiration: 1971-01-12

Description

Jan. l2, 1954 F. E. BROWN 2,665,687

SYRINGE ASSEMBLY Filed Aug. 2. 1950 aan INVENTOR ATTORNEYS Patented Jan. 12, 1954 UNITED STATES PATENT OFFICE 2,665,687 `srnmdc ASSEMBLY Frank E. Brown, Burbank, Calif., assignor to Frederick M. Turnbull, Los Angeles, Calif.

Application August 2, 1950, serial No. 177,239

16 Claims. 1

This invention relates to a structurally and functionally improved syringe assembly and especially the units of an assembly for use in connection with hypodermic injections.

It is an object of the invention to provide a desirable structure preferably in the form of an ampule or cartridge involving a plurality of compartments. Within one of these a medicament may be disposed and which medicament may be in the form ci a powder. Within the other a diluent is disposed. Immediately prior to the time that an injection is to be given these substances may be mixed to provide a solution; such mixture being achieved Without the necessity of any skillful manipulation or in fact conscious eiort on the part of the physician or other user. Therefore, a proper and fresh solution may be injected.

A further object is that of furnishing a unit of this type which may be employed in connection with a standard type of syringe barrel and Without modification of the latter. Accordingly, the physician will not be confronted with unfamiliar apparatus at the time he wishes to make the injection. Rather by proceeding according to a completely simple technique he will be able to eiiiciently provide the desired solution and inject the same. A

An additional object is that of furnishing a device of this character which will in-clude relatively few parts each individually simple in design; such parts being capable of ready production and assemblage and when so assembled maintaining the contained ingredients in a completely sterile condition, in a manner such that they will remain stable for indefinite periods of time.

With these and other objects in mind reference is had to the attached sheet of drawings illustrating one practical embodiment of the invention and in which:

Fig. l is a sectional side View of one form of ampule or cartridge constructed in accordance with the present teachings;

Fig. 2 showed the cartridge in its initial operative position within a syringe barrel;

Fig, 3 illustrates the parts in the positions which they assume just prior to the .injection operation;

Fig. i shows the iinal position of those parts;

Fig. 5 is a fragmentary enlarged sectional view of the outer end of the syringe assembly with the parts in the position shown in Fig. 4;

Fig. 6 is a traverse sectional View taken along the linet--5 and in the direction of the arrows as indicated Fig. 5; and

Fig. 7 is a fragmentary view of the end portion of the metering rod or actuating member.

In these views the numeral I 0 indicates the barrel. of a syringe formed of glass or other proper material. This barrel in accordance with conventional. construction may have its tubular rear end open and defined by a iiange portion I I.

' glass.

Its front end conveniently presents a transversely extending Wall I2 from which a tip or nose piece I3 projects outwardly. The latter Serves to mount in one of a number of accepted manner-s the hub I4 of a hypodermic needle I5.` The nose piece I3 is provided with a bore I6 establishing communication between the interior of barrel In and the bore of cannula I3.

The ampule or cartridge has been shown in Fig. 1. It embraces a body I1 of conveniently tubular conguration and preferably formed of One end of this member is closed by a piston type stopper I8 which may be provided with an outwardly extending integral collar portion I9. The opposite end of body Il is closed by a headed stopper 20, the edge of which may project beyond the side face of body Il. Between Stoppers I8 and 2|] a plug 2I is disposed. Both Stoppers and the plug are formed of rubber or other suitable material. Also as shown all three of these elements are provided with transversely extending centrally disposed bores.

With the Stoppers and plug properly spaced as shown in Fig. 1, it is apparent that compartments are embraced Within the body of the a'mpule or cartridge. Within the forward compartment medicament 23 may be disposed. That medicament is conveniently in the form of powder although pellets, grains, etc. might be employed and in certain instances this compartment could receive a liquid to be mixed with a diluent or other liquid initially in the rear compartment. However, as shown the latter compartment is llcd with diluent 22. Extending through the bores of the Stoppers and plug is a closure element preferably in the form of a glass rod 24 common to both Stoppers and the plug.

This rod has `aA body diameter ysuch that it completely fills and seals the apertures of the Stoppers and plug. It is formed with a centrally reduced portion `2li and av reduced end portion 26 the latter terminating in a preferably extended tip 2T having an outer rounded edge portion. With the parts disposed in their initial positions, the reduced central portion of the rod 24 lies adjacent the plug 2I and within the compartment containing medicament 23. The reduced end portion 2B extends beyond stopper 20. The latter portion and its tip may be enclosed by a protective cap 28 formed of any suitable material.

When the device is to be used cap 28 is removed and discarded. That end of the `ampule or cartridgewhich carries stopper 20 isintroduced into barrel I0. Conveniently at this time hub I4 is mounted on tip I3. The ampule is then telescoped into the barrel. If an Iaspirating action is desired it may be achieved by retracting the ampule or cartridge to a slight extent'from the barrel. Under these circumstances, the edge portion of stopper 20 will function as a piston in engagement with the inner face of the barrel to achieve the desired results. Continued projection of the ampule into the barrel will .result in the rounded tip portion 21 of rod 24 engaging the surfaces of the end wall l2 of that barrel at pointsA adjacent the bore IG. However, due to the configuration of portion 21, it will not obstruct that bore or passage in a manner such that solution is prevented from flowing through it.

An actuating plunger of plastic or other suitable material is now applied to exert pressure upon the assembly. As shown this plunger may include a tubular body 29 terminating in an outer thumb contacting `portion 3D. The diameter of tube 2S' may be such that it will frictionally engage with and telescope over collar portion I9 of stopper l. In any event with the parts Y assembled as described an inward thrust against the thumb portion 30 will lcause the cartridge V.body l1 to move to a position where the head of stopper 29 lies in contact with end wall l2. Under these circumstances rod 24 will have been automatically retracted'with respect to body I7.

This, of course, will occur because of the continuing engagement of the outer tip ,27 of reduced portion 26 with the inner surface of the end Wall of the barrel. Therefore, with such relative movement occurring on the part of the rod with respect to the ainpule it is apparent that the parts will occupy positions such as has been shown in Fig. 2. In that View the aperture of stopper I8 is still closed by the body of rod 24. However, the aperture of central plug 2l is now unobstructed to an extent such that diluent 22 may iiow through the aperture into the compartment containing the medicament. Iny other words, the reduced portion 25 has a length greater than the width of plug 2| and as it is shifted into line with the latter provides a bypass for such ow. Under these circumstances it will be appreciated that in accordance with preferred technique the entire assembly will be held substantially upright so that there will be no danger of a flow of diluent occurring through the bore of stopper 2B and so into the bore IS; it being noted that the reduced portion 2S now disposed in the aperture or bore of stopper 20 will provide a by-pass serving as a vent for air from the medicament compartment.

The projection of the piston may be continued until the parts occupy `the position shown in Fig. 3. It will be apparent in vthat figure that stopper I 8 has moved to a position in contact with plug 2|. Under these circumstancesV all diluent will have been forced through the bypass into the medicament compartment. Therefore, the physician will be -able to shake the assembly to provide a proper solution. The needle may now be caused to pierce the epidermis and continuing projection on the part of piston 30 will cause stopper E8 and plug 2| to move as a unit along rodV 24 and towards stopper 20. Therefore, the solution will be expelled from the medicament containing compartment and projecting in the usual manner through the bore of thebarrel tip or nose the bore ofthe cannula.

Continued projection will cause the vparts to assume the nal postion shown in Fig. 4 in which stances the frictional contact between, for eX- ample, collar i8 and the adjacent tubular surfaces 29 will assure that the entire ampule or cartridge assembly will withdraw with the piston. With removal of the spent cartridge the entire operation may be repeated. If necessary the parts may, of course, be sterilized prior t0 Y introducing a fresh ampule assembly into the barrel.

Thus among others several objects of the invention as specifically aforenoted are achieved. Obviously numerous changes in construction and rearrangement of the parts might be resorted to without department from the spirit of the invention as dened by the claims.-

I claim:

1. In a syringe assembly a tubular member, a pair of stoppers mounted thereby and spaced from .each other, said stoppers being formed with openings, a rod extending through said openings to obstruct a ow of uid through the same, said rod being formed with a pair of spaced portions each providing a by-pass 'disposable adjacent said stoppers and 'said rod being shiftable with respect to said stoppers to dispose said portions in the zones of the latter whereby fluid may bypass said stoppers.

2. In a syringe assembly a tubular member, a pair of stoppers mounted thereby and spaced from each other, said stoppers being formed with openings, a rod extending through said openings to obstruct a flow of fluid through the same, said rod being formed with a pair of spaced portions each providing a by-Dass disposable adjacent said stoppers, said rod being shiftable with respect to said stoppers to dispose said portions in the zones of the latter whereby huid may by-pass said stoppers and an extended and reduced end portion forming a part of said rod and serving to automatically manipulate the latter by engagement with the end Wall of a syringe.

3. In a syringe assembly a tubular member, a pair of stoppers mounted thereby and spaced from each other, said stoppers being formed with openings, a rod extending through said openings to obstruct a flow of fluid through the same, said rod being formed with a pair of spaced portions each providing a by-pass disposed adjacent said stoppers, said rod being shiftable with respect to said member and stoppers to dispose said portions inthe zones of the latter whereby uid may pass .through said stopper openings and a manipulating end forming a part of said rod and beyond one of the stoppers.

4. In a syringe assembly a tubular member, stoppers disposed adjacent the opposite ends of said member, said stoppers being formed with openings, a rod extending through said openings and formed with by-pass portions disposable adjacent said stoppers and an extended end forming aipart oi said rod at a point beyond one of said portions. Y

5. In ay syringe assembly a tubular member, stoppers disposed adjacent the opposite ends oi said member and each formed with an opening, a further stopper formed With an opening and disposed at a point intermediate said first named stoppers, a shiftable rod extending through the openings of all of said stoppersv and formed with a by-pass having its opposite ends extendable beyond the opposite faces of said further stopper an end portion of said rod extending beyond saidV member.

5. In a syringe assembly a tubular member, stoppers disposed adjacent the opposite ends of said member and each formed with openings, a

further stopper formed with an opening and disposed at a point intermediate said first named Stoppers, a rod extending through the openings of all of said Stoppers and said rod being formed with by-pass portions arrangeable adjacent certain of said Stoppers and being shiftable with respect to the latter to dispose said portions within the zones of their adjacent Stoppers.

7. In a syringe assembly a tubular member, stoppers disposed adjacent the ends of said member, a further stopper disposed intermediate said rst named Stoppers, all said Stoppers being formed with openings, a rod disposed to extend through such openings to obstruct a flow of iiuid past the same, said rod being formed with bypass portions arrangeable adjacent certain of said Stoppers and a tubular piston member engageable with one of said Stoppers and to receive in its bore a portion of said rod.

8. In a syringe assembly a tubular member, Stoppers disposed adjacent the ends of said member, a further stopper disposed intermediate said rst named Stoppers, all said stoppers being formed with openings, a rod disposed to extend through such openings to obstruct a flow of fluid past the same, said rod being formed with bypass portions arrangeable adjacent certain of said Stoppers, a tubular piston member engageable with one of said Stoppers and to receive in its bore a portion of said rod and a collar forming a part of a stopper to be engaged by said piston member, said collar frictionally contacting the bore of said latter member.

9, In a syringe assembly in combination a tubular member, a stopper disposed within the bore of said member and intermediate the ends of the same to divide said member into compartments to each side of said stopper, a rod extending through the stopper opening to normally prevent communication between said compartments, said rod being formed with a part to one side of said stopper andwhich part has a cross-sectional conguration different from that of said opening and said rod being axially shiftable with respect to said stopper to dispose said part to extend through said stopper'and beyond the opposite faces of the same to establish communication between said compartments.

10. A syringe assembly including in combination a tubular syringe body open at one of its ends and formed with an apertured wall at its opposite end, an ampule, partition means within said ampule to divide the interior thereof into two compartments, valve means carried by said ampule and shiftable with respect to said partition means to afford access between said compartments and an actuating portion forming a part of said valve means and extending beyond said ampule to be brought into contact with the end wall of said syringe as said ampule is shifted into the latter.

11. A syringe assembly including in combination an ampule, partition means within said ampule to divide the interior thereof into two compartments, valve means carried vby said ampule and shiftable with respect to said partition to establish communication between said compartments and means associated with said valve means to operate the latter as said ampule is disposed within a syringe barrel.

12. A syringe assembly including in combination an ampule, partitionmeans within said ampule at points adjacent one end and intermediate the ends of said ampule to divide the interior of the latter into two compartments,

valve means carried by said ampule and shiftable with respect to said partition means to establish communication between said compartments and also between points exteriorly of said ampule and adjacent the partition means disposed at the end of the ampule and means forming a part of said valve means for shifting the latter.

13. In a syringe assembly a substantially rigid rod body formed with a successive number of reduced portions, the body of said rod being disposable through openings formed in Stoppers to seal said openings against iluid ow, the length of said portions being greater than that of said openings and said rod being axially shiftable to bring each of said reduced portions into a position at which it extends through a stopper opening and beyond the opposite ends of the latter.

14. In a syringe assembly a substantially rigid rod body formed with a successive number of reduced portions, the body of said rod being disposable through openings formed in Stoppers to seal said openings against fluid flow, the length of said portions being greater than that of said openings, said rod being axially shiftable to bring each of said reduced portions into a position at which it extends through a stopper opening and -beyond the opposite ends of the latter and a reduced syringe-contacting end portion forming a part of said rod to automatically shift the latter.

15. In combination a tubular member, a pair of Stoppers closing the opposite ends of said member, a further stopper disposed between and spaced from said end Stoppers to provide a pair of compartments within said member, at least said further stopper and one of said end Stoppers being formed with openings, a shiftable rod extending through and closing said openings and said rod being formed with a by-pass portion disposed adjacent said further stopper and of a length greater than the length of the latter, whereby when said rod is shifted to cause the opposite ends of said by-pass to extend beyond the opposite faces of said further stopper communication is established between said compartments.

16. In combination a tubular member, a stopper disposed within the bore of said member and intermediate the ends of the latter to provide compartments within said member beyond opposite faces of said stopper, a further stopper disposed adjacent the end of said mem-ber and spaced from said rst main stopper, both of said Stoppers being formed with axially extending openings, a shiftable rod extending through said openings and said rod being formed with a by-pass disposed adjacent to said rst named stopper and having a length greater than the height of the latter, whereby said rod may be shifted to have the ends of said by-pass extend beyond opposite faces of said rst named stopper to establish communication between said compartments.

FRANK E. BROWN.

References Cited in the file of this patent UNITED STATES PATENTS