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Publication numberUS3295523 A
Publication typeGrant
Publication dateJan 3, 1967
Filing dateOct 17, 1963
Priority dateOct 17, 1963
Also published asDE1491639A1
Publication numberUS 3295523 A, US 3295523A, US-A-3295523, US3295523 A, US3295523A
InventorsTheodore E Weichselbaum
Original AssigneeBiolog Res Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Disposable syringe with novel rebounding squeeze bulb
US 3295523 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

1967 1'. E. WEICHSELBAUM 3295,523


United States Patent O 3,295523 DISPOSABLE SYRINGE WITH NOVEL REBOUNDING SQUEEZE BULB Theodore E. Weichselbaum, Normandy, Mo., assignor, by mesne assignments, t Biological Research, Inc. a corporation of Delaware Filed Oct. 17, 1963, Ser. N0. 316,885 1 Claim. (Cl. 128232) This invention relates to disposable syringes and more particularly to a one-piece plastic syringe.

Syringes which are equipped With a manually compressible bulb at one end are presently ntilized for many uses, particularly in the medical arts. These syringes have often been constructed of a glass body and nozzle with a rubber bulb at-taehed thereto. Other syringes have utilized plastic arts to reduce the manufacturing costs of the syringe.

The present invention reduces the cost of a syringe having a manually compressible bulb by not only utilizing inexpensive plastics for the body, nozzle, and manually compressible bulb, but also by making it cf a Singleiece plastic structure which is sulficiently inexpensive that it can be used once and then disposed of at a c0st which is less than the labor to wash and sterilize syringes previously utilized in the medical arts.

Accordingly, an object of the present invention is to provide a new and improved syringe.

Another object is to provide a one-piece plastic syringe having a resiliently compressible hollow bulb formed as an integral part thereof.

A further object is to provide a one-piece plastic sypringe having a hollow tubular body tapering into an extended nozzle at one end and tapering into a neck at the other end and having a hollow resiliently compressible bulb integrally formed with the neck.

A principal object is to provide a one-piece plastic syringe having a tubular body, an extended nozzle at one end of the tubular body, a hollow resiliently compressible bulb at the other end of the body and integrally formed structure with said bulb which prevents it frorn maintaining a permanently compressed shape after all compressible force has been rernoved.

Further objects and advantages will becorne apparent from the following detailed description taken in connection With the accompanying drawings, in which:

FIGURE 1 is an elevational view of an embodiment of the present invention; and

FIGURE 2 is a sectional view cf the embodiment of the invention illustrated in FIGURE 1 taken along the line 22.

While this invention is susceptible of embodiment in many diiferent forms, there is shown in the drawings and will herein be described in detail, an ernbodiment of the invention with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the embodixnent illustratecl. The scope of the invention will be point ed out in the appended claim.

With the rising cost of labor in the medical technician field, the cost of a single syringe, including utilization, sterilization and providing sterilized stonage, has steadily increased. The present invention provides a syringe which, by being disposable and economical in original mannfacturing costs, has a cost for each utilization which is less than that of previously known syringe structures.

Referring to the figures, a one-piece plastic disposable syringe is illustrated which may be cornposed cf any one of a number of plastic materials and produced by any one of a number cf Inolding methods Well known to those skilled in the art. Although many materials and molding methods may be utilized to produce the syringe illustrated in the figures, a preferred material for the syringe is acrylic ethylene copolymer, and a preferred method of molding the syringe is by the use cf a blow extrusion process.

The one-piece plastic syringe is composed of a hollow tubular body 10 which tapers into an extended nozzle 11 at one end and tapers into a neck 12 at the 0ther end. Integrally formed with these portions is a hollow resiently compressible bulb generally indicated at 20 which is cornprised of a semi-spherioal portion 21, an externally longitudinally concave portion 22 adjoining the spherical portion, a conical tapering portion 23 adjoining the concave portion 22 and also the neck 12, and a flat disc portion 24 adjoining the semi-spherical portion 21. The Walls of the syringe are translucent and the volumetric content of the syn'nge may be measured by a set of volumetric indices, generally indicated at 25, when the syringe is held in an upright position with the nozzle 11 extending downwardly.

The wall thickness of the syringe decreases from the conical portion 23 through the concave portion 22 and the semispherical portion 21, as illustrated in FIGURE 2. The thickness of the wall of the conical portion 23 and of the disc portion 24 is substantially thicker than the wall thickness throughout the externally concave portion 22 and the sernispherical portion 21. The thinness of the Wall structure in the semispherical portion 21 and the concave portion 22 allows these portions of the bulb to be particularly resilient and easily manually compressed. While these portions of the bulb 20 are being manually compressed, the conical tapering portion 23 and the disc portion 24, having relatively thick walls, Will not be compressed, but Will substantially retain the form illustrated in the figures. Previous resilient compressible bulbs, which were of substantially constant wall thic kness, would often remain in a cornpressed position with half of their semispherical structure being folded inside the other half after they had been laterally squeezed together. When the bulb 20 is laterally cornpressed, one side of it cannot be folded tightly enough inside the other side that it remains in such a Position when the lateral compressive forces are rernoved beeause the conical portion 23 and the dise portion 24 will not be folded in half.

In addition to being vulnerable 10 being permanently deformed by lateral cornpressive forces, revious syringe bulbs were often deforrned by excessive longitudinally compressive forces that folded the top side of the bulb inside a lower portion of the bulb. The bulb 20 resists being cornpressed by a longitudinally compressible force to the point that it will not immediately return to its original shape illustrated in the figures when all longitudinal force is removed. The externally concave portion 22 limits the distance which the semispherical portion and the disc portion 24 can be forced downwardly into it. Thns, it is substantially impossible for either a laterally compressible force or a longitudinally compressible force to cause the bulb 20 to assume a position from which it Will not immediately return to its original shape when all compressive forces are rernoved.

Those experienced in the art Will recognize hat either the conical portion 23 or the disc portion 24 alone tends to cause the bulb 20 to return to its original shape after the application of a compressive force, and would do so even if the other portion were not present. Those skilled in the art Will also recognize that the combination of the externally concave portion 22, without either, or with one of the portions 23 and 24, results in a novel bulb structure which resists permanent deformation. Therefore, all cornbinations of the deformation resisting portions 22, 23 and 24 are within the scope of the present invention. In addition, those skilled in the art Will recognize that the bulb portion 20 could be joined directly to 3 the =hol1ow tubular body 10 without the utilization of a neck 12 and with or withdut the conical portion 23 to produce embodirnents of the inventioh which will 'exhibit many of the desired features of the invention, but which will be somewhat simpler in construction.

sidered to be Within the true sc'ope cf the invention as pointed out in the appended claim.

I claim:

A one-piece p1astic syringe comprising a hollow tabular body tapering into an extended nozzle at one end and tapering into a neck portion at the other end and a hol1ow resiliently compressible bulb including a semispherical ortion, an externally longitudinally concave portion adjoining said semispherical portion, a conical tapring portion adjoining said concave portion and said neck portion, and a flat disc portion adjoining said semispherical portion opposite 10 said concave portion, said conical tapering portion and said flat disc portion having a wall thickness substantially greater than said semispherical portion, and said externally longitudinally concave ortion gradually 1 All such modified embodiments of the present invention are C011- varying in thickness from the thicker conical tapering portion to the thinner semispherical portion.

D. 194,419 1/ 1963 Whitton.

1029689 6/1912 Kelley 128239 1497,264 6/1924 Gurnee et a1 128-239 1,696486 12/1928 Jefireys 128231 2802605 8/1957 Parker 222215 2,808967 10/1957 Miller 128-232 X 2857914 10/1958 Carliner 128-232 1 FOREIGN PATENTS 475918 4/ 1915 France.

1 179,779 12/ 1958 France.

2,199 1859 Great Britain. 866,339 4/ 1961 Great Britain.

RICHARD A. GAUDET, Primary Examiner.

R. L. FRINKS, Assistant Examiner.

Patent Citations
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3430628 *Feb 23, 1965Mar 4, 1969Reatha L WigginsPlurality of aspirators
US3635218 *Mar 23, 1970Jan 18, 1972Eiliot Lab IncCombination bulb-piston syringe
US3650268 *Jul 7, 1969Mar 21, 1972Hesse Ruth LeaApparatus for artificial respiration or narcosis
US3670730 *Mar 12, 1971Jun 20, 1972Sampson CorpLiquid medicine applicator
US3732079 *Feb 3, 1971May 8, 1973Sterilizer Control RoyaltiesDisposable plastic syringe for use in colorimetry
US3938392 *Sep 20, 1973Feb 17, 1976Rodrigues Associates, Inc.Pipette
US4072249 *Feb 25, 1976Feb 7, 1978Landstingens InkopscentralContainer suitable for smaller quantities of fluid or semi-fluid substances
US5582330 *Dec 28, 1994Dec 10, 1996Allergan, Inc.Specific volume dispenser
US5787799 *Aug 26, 1996Aug 4, 1998Versa Technologies, Inc.Liquid baster
US6244308 *Nov 30, 1999Jun 12, 2001Duotrade Trading, Lda.Dripless freestanding baster
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US7401971 *Mar 27, 2001Jul 22, 2008Arkray, Inc.Method for stirring liquid
US8293192 *Mar 17, 2008Oct 23, 2012Hitachi High-Technologies CorporationDispensing nozzle tip
US20010028601 *Mar 27, 2001Oct 11, 2001Hisao HiramatsuMethod for strirring liquid
US20050117962 *Apr 8, 2004Jun 2, 2005Mathieu LionCulinary brush
US20060009741 *Apr 7, 2005Jan 12, 2006Jenn-Hae LuoSealed medicine dropper containing a liquid
US20080233013 *Mar 17, 2008Sep 25, 2008Ichiro SakaiDispensing nozzle tip
USRE28486 *Nov 28, 1973Jul 22, 1975 Apparatus for artificial respiration or narcosis
CN103212128A *Mar 25, 2013Jul 24, 2013蚌埠骄阳药业有限公司Vaginal lotion injector
U.S. Classification604/217, 222/215, D07/669, D24/115, 604/275
International ClassificationA61J7/00, A61M3/00
Cooperative ClassificationA61J7/0053, A61M3/00
European ClassificationA61M3/00, A61J7/00D10
Legal Events
Apr 18, 1983ASAssignment
Effective date: 19820412