|Publication number||US3478937 A|
|Publication date||Nov 18, 1969|
|Filing date||Jan 22, 1968|
|Priority date||Jan 22, 1968|
|Also published as||DE1766748A1|
|Publication number||US 3478937 A, US 3478937A, US-A-3478937, US3478937 A, US3478937A|
|Original Assignee||Solowey Ida|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (56), Classifications (9)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Nov. 18, 1969 I. SOLOWEY 3,478,937
DISPOSABLE SINGLE UNIT-DOSE SYRINGE WITH LOCKING PLUNGER Filed Jan. 22, 1968 i W k INVENTOR. 2 4-" [0/6 fazazug l/ 42;
United States Patent US. Cl. 222386 2 Claims ABSTRACT OF THE DISCLOSURE A single use syringe including a barrel with slidable plunger therein, the plunger being not returnable outwardly after being once depressed.
This invention relates generally t9 syringes such as are used to administer medication into the body cavity (other than by oral means) via a parenteral administration unit.
It is generally well known to those skilled in the art, that a proper amount of medication administered is an important element in the treatment of a patient. With a conventional syringe such as is presently widely used, an inexperienced technician, often in effecting a withdrawal of the instrument, accidentally pulls back the plunger, thus withdrawing also a portion of the medication already instilled. This is of course seriously objectionable and in want of improvement.
Accordingly it is a principal object of the present invention to provide an improved syringe; wherein the plunger is locked against returning after it has been depressed.
Another object is to provide an imp oved syringe that is accordingly adaptable for onetime use thereby assuring against being refilled with an inferior medication.
Yet another object is to provide an improved syringe for one time use which accordingly would contain a unit dose quantity of medication to assure administration of a correct amount thereof.
Other objects are to provide a disposable unit-dose syringe with locking plunger which is simple in design, inexpensive to manufacture, rugged in construction, easy to use and etficient in operation.
These and other objects will be readily apparent upon a study of the following specification and the accompanying drawing wherein:
FIGURE 1 is a side elevation view of the present invention shown partly in cross section, and illustrating the device in an initial position prior to use,
FIGURE 2 is a similar view shown fragmentarily, and showing the device during a plunging operation,
FIGURE 3 is a view similar to FIGURE 1 showing the plunger fully depressed and unable to be returned toward the initial position,
FIGURE 4 is a fragmentary side view of a modified form of the invention,
FIGURE 5 is a similar view thereof in an alternate position.
Reference now to the drawing in detail, the reference numeral .10 represents a disposable single unit dose syringe with locking plunger according to the present invention, wherein there is a barrel 11 and a plunger 12.
The barrel 11 made preferably of glass comprises a cylindrical member having a constricted neck 13 and outlet opening 14 at one end thereof. At its opposite end 15, a wide opening is provided for receiving a plunger head 16. The cylindrical side wall 17 of the barrel encloses a central chamber 18 wherein a single dose unit of medication 19 is stored adjacent the plunger head.
3,478,937. Patented Nov. 18, 1969 In the present invention, a collar 20 made of rigid material such as non-flexing plastic is rigidly affixed over the end 15 after the plunger head has been assembled into the barrel. The collar 20 has an inwardly extending flange 21 having a central opening 22.
The plunger 12 comprises a stern 23 secured at one end to the plunger head, the stem extending outwardly of the barrel and having an enlarged knob 24 at its other end. Intermediate the ends of the stem a collar unit 25 is rigidly secured around the plunger stem, the collar unit 25 comprising a non-flexing ring 26 and a disc 27 made of flexible material such as soft rubber or flexible plastic. The ring 26 has a circular, outer edge 28 which is slightly less in diameter than the opening 22 so to permit movement therethrough. The edge 28 may be downwardly tapered inwardly so to assure against the ring becoming hung up in abutment with the collar 20. The disc is adjacent the outer side of the ring and has an edge 29 of diameter greater than the opening 22 whereby it must be distorted when moved therethrough.
In operative use, to administer the medication, the plunger is moved as indicated by the arrow 30 in FIGURE 2. When the collar unit 25 reaches the barrel collar 20, the ring 26 passes therethrough 'without engagement therewith, but the disc being larger in diameter must be fixed as shown in the figure so as to squeeze past. Immediately after the disc has passed therethrough it straightens to its flat original position and at the same instant the plunger has traveled its full stroke into the barrel. The medication thus being fully administered, the device is removed from the patient. Should now force be accident-ally applied to pull the plunger outwardly, the disc will abut against the underside of the collar 20 preventing outward movement of the plunger. It will be noted that the ring adjacent the inner side of the disc will prevent flexing of the latter, whereas flexing was unobstructed in the opposite direction.
In FIGURES 4 and 5, a modified form 40 of the invention is shown wherein the above described barrel collar 20 and collar unit 25 are substituted by a mechanical device which comprises a pair of pawls 41 each secured pivot-ally free at one end on a pin 42 mounted in tandem relation on the stem 43. A notch 44 is provided on opposite sides of the stem for the purpose of receiving the pawls completely flush within the general cylindrical contour of the stem, whereby the stem may slide freely downward through an opening 45 in a rigid collar 46 wherein accordingly the opening 45 may not be distorted. A compression coil spring 47 extending through a transverse extending opening 48 bears at its opposite ends against the pawls and normally urges them apart. Upon downward movement of the plunger, the pawls are pivoted into the notches by force of the edge of rigid collar 46. After passing through the collar, the pawls immediately again spring into outward position to prevent upward movement of the plunger again.
While various changes may be made in the detail construction, it is understood that such changes will be within the spirit and scope of the present invention.
Having described my invention, what I claim as new and desire to secure by Letters Patent is:
1. A disposable single unit dose syringe comprising a barrel containing the medication to be administered and a plunger head mounted snugly for axial movement in the barrel, said plunger head having an actuating rod of smaller diameter extending through one end of the barrel, including a locking means mounted on the rod at a predetermined fixed distance from the plunger head, in further combination with a collar mounted on the end of the "barrel encompassing the rod, said collar having a central hole through which the rod passes, said locking means coacting with said collar to permit axial movement of said plunger head to a predetermined position in said barrel, wherein the locking means comprises a relatively inflexible member of smaller dimension than the collar hole and a relatively flexible portion larger than the hole extending radially beyond the inflexible member 'whereby said member can pass through the hole with said flexible portion flexibly engaging the collar to snap behind the collar when the plunger has been moved to the determined position.
2. A syringe as in claim 1 wherein the member is frusto conical and located between the plunger head and the 15 flexible portion.
References Cited UNITED STATES PATENTS 1,798,116 3/1931 'Brockway 128218 2,015,970 10/1935 Schoene 128-218 2,661,126 12/1953 Spencer 222-386 FOREIGN PATENTS 1,149,735 12/1957 France.
449,762 9/1927 Germany.
ROBERT B. REEVES, Primary Examiner H. S. LANE, Assistant Examiner US. Cl. X.R. 12-8-218
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1798116 *||Feb 9, 1928||Mar 24, 1931||Macgregor Instr Company||Syringe|
|US2015970 *||Dec 23, 1933||Oct 1, 1935||Josef Schoene||Injection syringe|
|US2661126 *||May 8, 1952||Dec 1, 1953||Spencer Alvin C||Dispensing container having a slidable bottom forming a follower|
|DE449762C *||Sep 26, 1926||Sep 21, 1927||Walter Berndt||Ausgeber fuer Mostrich|
|FR1149735A *||Title not available|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3835835 *||Nov 7, 1972||Sep 17, 1974||Richardson Merrell Inc||Two compartment locking sampling syringe|
|US4731068 *||May 1, 1987||Mar 15, 1988||Hesse John E||Non-reloadable syringe|
|US4758232 *||Sep 8, 1987||Jul 19, 1988||Chak Choi K||Suction syringe with an automatic locking means|
|US4832694 *||Feb 8, 1988||May 23, 1989||Raphael Iii Julian J||Programmed action hypodermic syringe|
|US4852768 *||Mar 22, 1988||Aug 1, 1989||Blendax-Werke R. Schneider Gmbh & Co.||Dosing syringe|
|US4883466 *||Apr 25, 1988||Nov 28, 1989||Glazier Stephen C||Non-reusable syringe|
|US5000735 *||Jan 5, 1989||Mar 19, 1991||The Regents Of The Univ. Of California||Single use syringe|
|US5047015 *||Nov 13, 1989||Sep 10, 1991||Merit Medical Systems, Inc.||Locking syringe|
|US5057078 *||Mar 17, 1989||Oct 15, 1991||Merit Medical Systems, Inc.||Locking syringe|
|US5062832 *||Nov 7, 1989||Nov 5, 1991||L. Molteni & C. Dei F.Lli Alitti S.P.A.||Anticontagion device for injecting dental anesthetic solutions contained in cartridges|
|US5116320 *||Oct 3, 1991||May 26, 1992||Gi.Bi.Effe S.R.L.||Disposable syringe for once-only use|
|US5135488 *||Mar 17, 1989||Aug 4, 1992||Merit Medical Systems, Inc.||System and method for monitoring, displaying and recording balloon catheter inflation data|
|US5163904 *||Nov 12, 1991||Nov 17, 1992||Merit Medical Systems, Inc.||Syringe apparatus with attached pressure gauge|
|US5201753 *||Mar 4, 1991||Apr 13, 1993||Merit Medical Systems, Inc.||Totally self-contained, digitally controlled, disposable syringe inflation system, and method for monitoring, displaying and recording balloon catheter inflation data|
|US5209732 *||Mar 4, 1991||May 11, 1993||Merit Medical Systems, Inc.||Locking syringe with thread-release lock|
|US5259838 *||Jun 18, 1992||Nov 9, 1993||Merit Medical Systems, Inc.||Syringe apparatus with attached pressure gauge and timer|
|US5300027 *||Mar 18, 1992||Apr 5, 1994||Merit Medical Systems, Inc.||System and method for monitoring and displaying balloon catheter inflation and deflation data|
|US5328484 *||Jul 30, 1993||Jul 12, 1994||Brice Somers||Non-reusable syringe for medical purposes|
|US5378240 *||Nov 8, 1990||Jan 3, 1995||Curie; Napoleon||Syringe with retractable needle mount|
|US5385549 *||Mar 4, 1993||Jan 31, 1995||Merit Medical Systems, Inc.||Digitally controlled, disposable syringe inflation system, and method for monitoring, displaying balloon catheter inflation data|
|US5395339 *||Jan 31, 1992||Mar 7, 1995||Sherwood Medical Company||Medical device with sterile fluid pathway|
|US5399170 *||Aug 30, 1993||Mar 21, 1995||Western Medical Products Pty Limited||Syringe|
|US5425713 *||Apr 4, 1994||Jun 20, 1995||Merit Medical Systems, Inc.||System and method for monitoring, displaying and recording balloon catheter condition interval and inflation location data|
|US5431629 *||Apr 4, 1994||Jul 11, 1995||Merit Medical Systems, Inc.||System and method for monitoring, displaying and recording balloon catheter condition interval data|
|US5449344 *||Nov 5, 1993||Sep 12, 1995||Merit Medical Systems, Inc.||Syringe apparatus with pressure gauge and detachable timer|
|US5449345 *||Mar 30, 1994||Sep 12, 1995||Merit Medical Systems, Inc.||Detachable and reusable digital control unit for monitoring balloon catheter data in a syringe inflation system|
|US5453091 *||Apr 5, 1994||Sep 26, 1995||Merit Medical Systems, Inc.||RF transmission module for wirelessly transmitting balloon catheter data in a syringe inflation system|
|US5458571 *||Apr 4, 1994||Oct 17, 1995||Merit Medical Systems, Inc.||System and method for monitoring, displaying and recording balloon catheter condition interval data|
|US5472424 *||Apr 5, 1994||Dec 5, 1995||Merit Medical Systems, Inc.||Syringe with volume displacement apparatus|
|US5833660 *||Nov 18, 1997||Nov 10, 1998||Nathan; Elizabeth S.||Non-reusable syringe|
|US5997511 *||Apr 19, 1996||Dec 7, 1999||Curie; Napoleon||Single use syringe|
|US6368306||Jul 11, 1997||Apr 9, 2002||Star Syringe Ltd||Syringes|
|US7331934||May 4, 2004||Feb 19, 2008||Becton Dickinson Co||Syringe assembly having disabling mechanism|
|US7331935||Feb 23, 2005||Feb 19, 2008||Becton, Dickinson And Company||Syringe assembly having disabling mechanism|
|US7399293||Mar 5, 2007||Jul 15, 2008||Becton, Dickinson And Company||Syringe assembly having disabling mechanism with tamper resistance features|
|US7537582||Jan 24, 2008||May 26, 2009||Becton, Dickinson And Company||Syringe assembly having disabling mechanism|
|US8287491||Nov 25, 2009||Oct 16, 2012||Becton, Dickinson And Company||Single-use auto-disable syringe|
|US8562582||May 24, 2007||Oct 22, 2013||Bayer Healthcare Llc||Reconstitution device|
|US8608692||Mar 20, 2008||Dec 17, 2013||Arpita Agrawal||Fluid collection self-locking, self-blunting safety needle system and syringe|
|US8936569||Aug 24, 2006||Jan 20, 2015||Arpita Agrawal||Self-locking, self-blunting safety needle system and syringe|
|US9072844||Sep 23, 2003||Jul 7, 2015||Thomas A. Alheidt||Flush syringe having anti-reflux features|
|US9205205||Sep 14, 2012||Dec 8, 2015||Becton, Dickinson And Company||Single-use auto-disable syringe|
|US20050027250 *||May 4, 2004||Feb 3, 2005||Becton, Dickinson And Company||Syringe assembly having disabling mechanism|
|US20050063857 *||Dec 9, 2003||Mar 24, 2005||Alheidt Thomas A.||Flush syringe having anti-reflux stopper|
|US20060030820 *||Sep 23, 2003||Feb 9, 2006||Alheidt Thomas A||Flush syringe having anti-reflux features|
|US20060247582 *||Jan 7, 2005||Nov 2, 2006||Becton, Dickinson And Company||Positive displacement flush syringe|
|US20080009796 *||Mar 5, 2007||Jan 10, 2008||Becton, Dickinson And Company||Syringe assembly having disabling mechanism with tamper resistance features|
|US20080177229 *||Jan 24, 2008||Jul 24, 2008||Becton, Dickinson And Company||Syringe assembly having disabling mechanism|
|US20090275891 *||Aug 24, 2006||Nov 5, 2009||Arpita Agrawal||Self-locking, self-blunting safety needle system and syringe|
|US20100036316 *||Mar 20, 2008||Feb 11, 2010||Arpita Agrawal||Fluid collection self-locking, self-blunting safety needle system and syringe|
|US20100069840 *||Mar 18, 2010||Becton, Dickinson And Company||Syringe Assembly Having Disabling Mechanism|
|US20110087173 *||Oct 7, 2010||Apr 14, 2011||Sibbitt Jr Wilmer L||Automatic syringes|
|US20140131394 *||Jan 23, 2014||May 15, 2014||James R. Wheeler||Container for viscous comestibles|
|EP1260343A1||Jul 11, 1997||Nov 27, 2002||Star Syringe Limited||Apparatus for making syringes|
|WO1989004681A1 *||Nov 16, 1988||Jun 1, 1989||Catch 522 Pty. Limited||Single use syringe|
|WO1998002198A1||Jul 11, 1997||Jan 22, 1998||Star Syringe Limited||Syringes|
|U.S. Classification||222/386, 604/110, 604/218|
|International Classification||A61M5/50, A61M3/00|
|Cooperative Classification||A61M3/00, A61M5/5013|
|European Classification||A61M5/50B, A61M3/00|