Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3820541 A
Publication typeGrant
Publication dateJun 28, 1974
Filing dateSep 11, 1972
Priority dateSep 11, 1972
Publication numberUS 3820541 A, US 3820541A, US-A-3820541, US3820541 A, US3820541A
InventorsLangan J
Original AssigneeLangan J
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Shield for hypodermic syringe
US 3820541 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Langan 1111 3,820,541 June 28, 1974 SHIELD FOR HYPODERMlC SYRINGE [76] Inventor: James Langan, 100 Glenroe Dr.,

' Baltimore, Md. 21228 [22] Filed: Sept. 11, 1972 [21] Appl. No.5 287,719

[52] US. Cl ..l 128/215, 128/2 A, 128/1.l [51] Int. Cl. A6lm 5/00, A61b 6/10 [58] Field of Search 128/215, 216, 2 R, 2 A,

l28/l.1, 1.2, 218 R, 218 A, 218 c, 218 D, 218 F, 221; 206/63.2 R, 63.2 A, 63.4, 17.5, 43, 1.5; 222/15 173 3,628,523 12/1971 Pirtle, Jr. 128/2 A FOREIGN PATENTS OR APPLICATIONS 598,205 9/1959 ltaly 206/43 Primary ExaminerRichard A. Gaudet Assistant Examiner-J. C. McGowan Attorney, Agent, or FirmCharles E, Temko [57] ABSTRACT A shield for a hypodermic syringe adapted to surround the barrel thereof to protect the user against radiation emanating from radioactive fluids contained therein. The shield is lead-lined, and is provided with a bayonet fitting element engaging the manually engaged end of the syringe. A coil spring cooperates with the bayonet fitting element to prevent wobbling between the barrel of the syringe and the barrel of the shield. The barrel of the shield is so configured that a small end of the barrel of the syringe is uncovered to permit visual inspection of flow to and from the syringe.

2 Claims, 4 Drawing Figures DISCUSSION OF THE PRIOR ART It is known in the art to surround radioactive materials with lead barriers to prevent radiation from passing therethrough. Prior art devices of this type have included tubular shields which are positionable upon the barrel of a syringe. Such devices have suffered from a variety of disadvantages, including difficulty in engaging and disengaging the same from a hypodermic syringe barrel, and in addition, they have tended to obscure visual inspection of the flow of fluid to and from the syringe barrel.

BRIEF DESCRIPTION OF TI-IE'PRESENT INVENTION Briefly stated, the invention contemplates the provision of a device including a relatively rigid outer barrel which is lined with a tubular lead shield, the same being adapted to fit upon the barrel of a hypodermic syringe. One end of the shield is provided with a bayonet mount which engages the laterally extending finger-engaging flanges on the plunger end of the syringe, the bayonet mounting construction forming a recess into which a coil spring is seated, the coil spring having a line of action extending past the bayonet lugs, so that the syringe barrel may be conveniently inserted and rotated to fixed position, being maintained in such position by the action of the spring urging the laterally extending projections against the bayonet lugs. The barrel of the syringe is relatively loosely fitted with respect to the lead lining of the shield, so that little if any force is required to disconnect the shield from the syringe. The length of the shield is such that a very small segment of the barrel is exposed to view adjacent the needle mounting means, so that the flow of fluid to and from the barrel through the needle may be readily observed.

BRIEF DESCRIPTION OF THE DRAWING In the drawing, to which reference will be made in the specification, similar reference characters have been employed to designate corresponding parts throughout the several views.

FIG. 1 is an exploded view in elevation of an embodiment of the invention in conjunction with a conventional hypodermic syringe.

FIG. 2 is a similar side elevational view showing the barrel of the syringe in fully engaged condition with respect to the device.

FIG. 3 is a longitudinal central sectional view of the embodiment.

FIG. 4 is an end elevational view as seen from the righthand portion of FIG. 2.

DETAILED DESCRIPTION OF THE DISCLOSED EMBODIMENT In accordance with the invention, the device, generally indicated by reference character 10, comprises broadly: a main barrel element 1 1, a bayonet fitting element l2 and a coil spring member 13.

The main barrel element 11 is of hollow tubular construction, and includes an outer sleeve 16 of brass or other relatively rigid metallic material. The sleeve 16 is bounded by a first end edge 17, a second end edge 18, an outer surface 19 and an inner surface 20. Disposed within the sleeve 16 is a lead sleeve 21 of coextensive dimensions, and bounded by a first end edge 22, a second end edge 23, an outer surface 24 and an inner surface 25.

The bayonet fitting element 12 is fitted upon one end of the main barrel element 11, and is also preferably of tubular brass construction. It is bounded by an inner surface 28, an outer surface 29, a first end edge and a second end edge 31. A pair of L-shaped indentations 32 define corresponding bayonet lugs 33 surrounding a tubular recess 34 in which the coil spring member 13 is frictionally engaged.

Referring to FIG. 1 in the drawing, a conventional syringe 35 is shown prior to insertion within the shield. The syringe 35 includes a needle element 36 detachably interconnected at one end of a barrel element 37 by means of a needle fitting 38. A tubular portion 39 of the barrel element extends rightwardly to terminate in a pair of laterally extending manually engageable tabs 40 immediately adjacent the outer end of the plunger 41.

The syringe 35-is assembled within the device 10 by moving the same as shown in FIG. 2. to a point where the tabs or projections 40 enter the L-shaped indentations 32, following which a clockwise twist engages them beneath the lugs 33. They are retained in this position by the force exerted by the thereby compressed spring 13. It will be observed in FIG. 2 that the lower end of the barrel portion 37 projects outwardly of the main barrel element so as to be clearly visible during use. In the condition shown in FIG. 2, the syringe may be used in well known manner, and may be conveniently removed when required by merely exerting a counterclockwise twist to the laterally extending projections on the barrel thereof. Once disconnected, the device may be autoclaved or otherwise rendered in sterile condition without damage, and the spring member 13 may be conveniently removed and replaced as required.

I wish it to be understood that I do not consider the invention limited to the precise details of structure shown and set forth in this specification, for obvious modifications will occur to those skilled in the art to which the invention pertains.

I claim:

1. A shield for a hypodermic syringe for protecting the user against the radiation of radioactive fluids contained in the barrel of the syringe comprising: a main barrel element including an outer cylindrical sleeve of relatively rigid material and defining a cylindrical bore, a sleeve of radiation shielding material supported upon an inner surface of said outer sleeve, and substantially co-extensive therewith, a bayonet fitting element of tubular configuration, one end thereof being fitted upon an end of .said main barrel element, and forming a pair of bayonet lugs extending from a second end thereof, said bayonet fitting element defining a cylindrical recess coaxial with the principal axis of said main barrel element, and a coil spring disposed within said recess engaging said end of said main barrel element and having an axially oriented line of action cooperating with said bayonet lugs.

2. Structure in accordance with claim 1 in combination with a hypodermic syringe barrel having a pair of 5

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3973554 *Apr 24, 1975Aug 10, 1976The United States Of America As Represented By The Secretary Of The Department Of Health, Education And WelfareRadiation safety shield for a syringe
US3993063 *Jun 16, 1975Nov 23, 1976Union Carbide CorporationProtective shielding assembly for use in loading a hypodermic syringe with radioactive material
US4048997 *Nov 1, 1976Sep 20, 1977Mpl, Inc.Syringe with actinic radiation protection
US4056096 *Mar 19, 1976Nov 1, 1977Medi-Ray, Inc.Shielded syringe
US4060073 *Mar 19, 1976Nov 29, 1977Medi-Ray, Inc.Syringe shield
US4092546 *Jun 8, 1976May 30, 1978Union Carbide CorporationLead alloy containing at least 85% lead
US4122836 *Sep 13, 1976Oct 31, 1978Nuclear Pacific, Inc.Shielding holder for radionuclid syringes
US4185619 *Dec 1, 1975Jan 29, 1980Atomic Products CorporationRetractable shield for syringes
US4240421 *Jun 26, 1979Dec 23, 1980Carr James RSyringe shield for radioactive materials
US4401108 *May 29, 1981Aug 30, 1983Thomas Jefferson UniversityRadioactive material loading, calibration and injection systems
US5000167 *Aug 3, 1989Mar 19, 1991Sherwood Medical CompanyBlood collection tube holder safety guard
US5013301 *Nov 18, 1988May 7, 1991Marotta Jr PhillipSyringe holder
US5188119 *Oct 29, 1990Feb 23, 1993Sherwood Medical CompanyBlood collection tube holder safety guard
US5514071 *Oct 6, 1994May 7, 1996Sielaff, Jr.; Carl F.Of radioactive solution into a patient
US5651774 *Sep 11, 1996Jul 29, 1997William J. TarantoHypodermic syringe with safety shield and method of using same
US5716317 *Dec 2, 1994Feb 10, 1998Nihon Medi-Physics Co., Ltd.Sheath for syringe barrel
US6016800 *Oct 24, 1997Jan 25, 2000Century; Theodore J.Intrapulmonary aerosolizer
US6589158Jan 17, 2001Jul 8, 2003Proxima Therapeutics, Inc.Radiation shield for a syringe
DE2711946A1 *Mar 18, 1977Sep 29, 1977Medi Ray IncInjektionsspritze
EP0661074A2 *Dec 28, 1994Jul 5, 1995NIHON MEDI-PHYSICS Co., Ltd.Transport container for transporting radiation shield member
WO1994013347A1 *Dec 9, 1993Jun 23, 1994Mallinckrodt Medical IncPrefilled delivery apparatus adapted for sterile use
WO1999021599A1 *Oct 8, 1998May 6, 1999Theodore J CenturyIntrapulmonary aerosolizer
Classifications
U.S. Classification604/187, 600/5, 976/DIG.351
International ClassificationG21F5/018, G21F5/00, A61M5/178
Cooperative ClassificationA61M5/1785, G21F5/018
European ClassificationG21F5/018, A61M5/178R