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.


  1. Advanced Patent Search
Publication numberUS561059 A
Publication typeGrant
Publication dateMay 26, 1896
Filing dateJun 25, 1894
Publication numberUS 561059 A, US 561059A, US-A-561059, US561059 A, US561059A
InventorsWalter P. Mitchell
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Hypodermic syringe
US 561059 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

- (No Model.)


HYPODERMIU SYRINGB- No. 561,059. 4 Patented May 26, 1896.




SPECIFICATION forming part of Letters Patent No. 561,059, dated May 26, 1896.

FApplication filed June 25, 1894.

have invented certain new and useful Improvements in Hypodermic Syringes, of which the following is a specification.

Our invention relates to hypodermic syringes, or, more particularly speaking, to a combined syringe and safety hollow trocarneedle provided with a sheath or cannula for making the puncture and injecting fluid into a cavity without removing the instrument, and also permitting the evacuation of fluid from said cavity upon the withdrawal of all of said instrument except its cannula.

The objects of our invention are, first, to avoid and remove the danger of wounding blood vessels, nerves, or vital organs in depositing medicines in the vicinity of said vital organs; second, to provide a combined instrument, as above named, which may also be used to evacuate the liquid contents-such as pus, serum, and the like-frorn abcesses or other cavities; third, with the same instrument to inject such cavities with antiseptics or other medicaments, and, fourth, to provide a safety device or protecting-gage for the hypodermic needle and its sheath or cannula which may be used to properly restrict the depth of its passage into the tissues to any desired distance from full length thereof to, say, one-eighth of an inch, more or less. We attain these objects by means ofthe novel mechanism hereinafter fully described, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of our invention complete, showing the parts of the instrument in the position they are set for making the injection after the outer puncture or opening in the skin is made, the point of the trocar-needle lying back within the cannula; Fig. 2, a central longitudinal section, partly in elevation, of our instrument, with the parts adjusted to the position they assume when ready for puncturing the skin, the point of the trocar- Serial No. 515,582. (No model.)

. needle projecting the desired distance beyond the fore end of the cannula; Fig. 3, a detail plan view of the safety attachment for main- 'taining the proper relation between the point of the trocar-needle and the fore end of the cannula for both the puncturing operation and the insertion of the cannula with the hidden and sheathed needle-point of the hollow trocar within; Fig. 4, a central longitudinal section of the ordinary form of cannula used with our improvement; Fig. 5, an enlarged central longitudinal section of our novel construction of hollow trocar-needle; Fig. 6, a central longitudinal section of a modified form of the safety attachment seen in Fig. 8, and Fig. 7 a fore end view of Fig. 6.

A represents the open metallic shell or casing of the syringe, having the internal glass body or barrel A and rear cross-bar or handle a, as customary.

B is the piston or plunger, and b the usual screw-threaded and graduated piston rod, having the outer operating head or handle I).

0 represents the syringe needle, constructed straight and hollow throughout its length, as clearly shown in the enlarged view, Fig. 5, and having a triangular or three-sided pyramidal point of trocar form, the extreme sharp tip thereof being central with its axis, as best seen in Figs. 2 and 5. The bore of this needle terminates in an opening 0, made in one or more of the plane surfaces of said trocar-point.

G is the usual internally-threaded enlargement or hub at the inner end of the needle, whereby it is attached to the orificed and externally-threaded syringe-cap a.

D represents a straight cannula accompanying the said straight trocar-needle,and having the usual rear flange d. Y

E represents a band or thimble encircling the syringe, and adapted to be slid back and forth, as occasion may require, thereover. F is a bar projectingforwardly from said band E, and having its distal or fore end bent downward and forked at f to engage the flange d of the cannula, the latter being properly passed or freely slipped over the trocar-needle. Fork f is bent both front and rear, as best seen in Fig. 1, so as to engage both the front and rear sides of said flange (I, one wing or branch of the fork projecting forward and the other rearward, thus embracing the flange and enabling the cannula to travel in either direction over the needle simultaneous with said bar F, and being especially effective in positively grasping said cannula-flange when the cannula is buried its full depth, and thereby otherwise difficult to catch hold of with the fingers in removing, as hitherto practiced.

F is a longitudinal slot made in the bar F, and e a set-screw whose shank passes through said slot into a block or lug e, constructed on the fore end of the syringe-shell A, for securing the said bar and its accompanying cannula in the desired positions in relation to the needle-point. The band E is provided to give the bar stability at itsrear end as well as throughout its length, and the mode of attachment of said bar to the band may be effected by means of a rivet f, as seen in Figs. 1, 2, and 3, or soldered, as seen in Fig. 6.

In Fig. 6 the fork f does not have its prongs project fore and aft to engage over or straddle the cannula-flange, as in the first three views, but it constitutes simply a single bend in the bar with a semicircular notch therein, which rests against the rear end or face of said cannula-flange, and the said notch partly surrounds the shaft of the trocar-needle between the cannula and the hub of said needle. The set-screw in this view passes downwardly through the rear end of the bar, where the latter is attached to the band, thence through said band, and the lower end of its shank bears firmly upon the upper longitudinal bar of the open syringe-shell A to adjustably and detachably secure the bar F (which is not slotted in this form) in the desired position. Bar F is given such extra length, as shown, to enable its operation and use in connection with various lengths of needles and cannulzc. The needle may be of any size and length required, and is made externally like the ordinary trocar, as stated; but it differs from the latter in being hollow throughout its length, and it differs also from other hypodermic needles in having its hollow bore terminating in one or more openings 0 in the several plane faces of its pyramidal trocar-point, as aforesaid. These openings 0, constructed and located as shown, do not interfere with or affect the delicate point of the needle, but, at the same time, they are free and clear at all times to permit the full escape or ejection of the medicated fluid from the syringe through and from the needle while the point of the latter is within the cannula. The trocar-point also enables the making of an opening on each face thereof to provide for a greater or less discharge or volume of injection.

The operation of our instrument is as follows: Having arranged or adjusted the parts,

as shown in Fig. 2, with the trocar-needle point projecting beyond the cannula, the syringe is charged with fluid by inserting the needle therein and withdrawing the plunger B the desired stroke. The trocar-point of the needle and the accinnpanyi g cannula are then thrust into and through'the skin, or such tissues as we wish to puncture and penetrate. The set-screw on the bar F is then loosened, and the entire instrument, excepting the cannula, withdrawn ashort distance (say onefourth of an inch, more or less) outwardly till the said trocar-point lies back within the cannula. The said set-screw is then tightened to firmly fix or hold the said bar and the cannula in the forward position, concealing and shielding the trocar-point, as seen in dotted lines, Fig. l. The instrument, with the blunt cannula at its extreme fore end, can now be passed with safety to its full depth, if desired, into the cavity, canal, or tissues wherein the medicine is to be deposited, and the injection completed by simply pressing forward 011 the syringe-plun ger. This usually dan gerous operation is thus readily made by even an ordinary practitioner or a novice without danger of piercing or otherwise injuring deli cate organs, and only possible heretofore by very skilful surgeons, who have been. coinpelled to use unprotected needles or other sharp instruments among said organs. It will be seen that the syringe having our 1101' low trocar-needle need not be withdrawn bodily from the cannula until after the in jection is made, thus effectually obviating the entrance of air through the heretofore open cannula, while the solid trocar of the past had to be removed before the injector-nozzle could be applied and reinserted. \Ve thus provide in connection with a syringe a combined trocar-needle and injector-nozzle, which, with a cannula or sheathing-tube, make a very si inple, safe, and efficacious instrument.

This device is especially adapted to the treatment of hernia, hydrocclc, and varicocele, and the blunt cannula, adjusted as seen in Fig. 1, can be passed nowhere other than along the proper canal, thus making the instrument what might be fully termed absolutely safe.

\Ve claim 1. A hollow needle and ejectoi nozzle for hypodermic syringes, composed of a straight tube having at one end an attaching-head and at the other constructed into a threc-sided pyramidal point of trocar form, one or more of the three plane sides of said trocar-point having an exit-aperture therein leading to the bore of the needle, and the sharp tip of said trocar-point being axially central. with the body of the nozzle-needle, substantially as herein set forth.

2. The combination with a hypodermic syrin ge having a suitable barrel and plunger, of a straight hollow needle having a pyramidal trocar-point, with a central, axial tip, the bore of said needle terminating in an opening in In testimony of which invention We have one or more of the plane surfaces of the threehereunto set our hands.

sided trocar-point a straight flan ed sheath or cannula on said trooarneedlefand a slid- 5 ing slotted bar or gage having an open fore jaw or fork f and an adjusting set-screw and WVitnesses: mounted on the syringe-barre1, substantially JOHN E. JONES, as and for the purpose specified. EDW. B. TROUTS.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2571653 *Feb 25, 1950Oct 16, 1951Gerard Bastien VictorSyringe
US2773501 *Mar 10, 1955Dec 11, 1956Young Harold SDrill element for effecting intraosseous fluid injections and the like
US3356089 *Mar 1, 1965Dec 5, 1967Francis Howard RInjection needle guide
US3923059 *Oct 11, 1973Dec 2, 1975Ims LtdMedicament injector
US4266543 *Feb 22, 1979May 12, 1981Blum Alvin SHypodermic needle protection means
US4710180 *Oct 6, 1986Dec 1, 1987Johnson Gerald WLipoject needle
US5273540 *Apr 26, 1991Dec 28, 1993Luther Medical ProductsNonreusable needle and catheter assembly
US5478328 *Sep 2, 1993Dec 26, 1995Silverman; David G.Methods of minimizing disease transmission by used hypodermic needles, and hypodermic needles adapted for carrying out the method
US5522807 *Sep 7, 1994Jun 4, 1996Luther Medical Products, Inc.Dual lumen infusion/aspiration catheter
US5531701 *Jun 6, 1994Jul 2, 1996Luther Medical Products, Inc.Over-the-needle catheter
US5533988 *Aug 23, 1994Jul 9, 1996Luther Medical Products, Inc.Over-the-needle catheter
US5554136 *Feb 27, 1995Sep 10, 1996Luther Medical Products, Inc.Dual lumen infusion/aspiration catheter
US5569217 *Oct 27, 1994Oct 29, 1996Luther Medical Products, Inc.Percutaneous port catheter assembly and method of use
US5683370 *Nov 21, 1996Nov 4, 1997Luther Medical Products, Inc.Hard tip over-the-needle catheter and method of manufacturing the same
US5738660 *Jun 27, 1996Apr 14, 1998Luther Medical Products, Inc.Percutaneous port catheter assembly and method of use
US5913848 *Jun 6, 1996Jun 22, 1999Luther Medical Products, Inc.Hard tip over-the-needle catheter and method of manufacturing the same
US5916208 *Nov 21, 1996Jun 29, 1999Luther Medical Products, Inc.Hard tip over-the-needle catheter and method of manufacturing the same
US5957893 *Sep 8, 1998Sep 28, 1999Becton Dickinson & Co.Hard tip over-the needle catheter and method of manufacturing the same
US6045734 *May 18, 1999Apr 4, 2000Becton Dickinson And CompanyProcess of making a catheter
US6257498Oct 7, 1997Jul 10, 2001James R. SiebolMethod and apparatus for an agricultural air handler
US6918892 *Apr 23, 2004Jul 19, 2005Howard MartinIntraosseous needle
US7060052 *Nov 26, 2003Jun 13, 2006Boston Scientific CorporationGuidewire and catheter locking device and method
US7670316Jun 9, 2006Mar 2, 2010Boston Scientific CorporationGuidewire and catheter locking device and method
US7706861Jun 28, 2006Apr 27, 2010Boston Scientific Scimed, Inc.Guide wire insertion and re-insertion tools and methods of use
US8043208Mar 15, 2010Oct 25, 2011Boston Scientific Scimed, Inc.Guide wire insertion and re-insertion tools and methods of use
US8206283Feb 26, 2010Jun 26, 2012Boston Scientific CorporationGuidewire and catheter locking device and method
US8343041May 18, 2009Jan 1, 2013Boston Scientific Scimed, Inc.Integrated locking device with passive sealing
US8343105Nov 16, 2010Jan 1, 2013Boston Scientific Scimed, Inc.Multi-size convertible catheter
US8372000Dec 21, 2007Feb 12, 2013Boston Scientific Scimed, Inc.Method and apparatus for biliary access and stone retrieval
US8388521May 18, 2009Mar 5, 2013Boston Scientific Scimed, Inc.Integrated locking device with active sealing
US8480570Feb 11, 2008Jul 9, 2013Boston Scientific Scimed, Inc.Endoscope cap
US8888681Feb 11, 2013Nov 18, 2014Boston Scientific Scimed, Inc.Method and apparatus for biliary access and stone retrieval
US9131831Dec 20, 2012Sep 15, 2015Boston Scientific Scimed, Inc.Integrated locking device with passive sealing
US9180276Dec 26, 2014Nov 10, 2015Terumo Kabushiki KaishaMethod involving use of an assembled indwelling assembly
US9186483Dec 26, 2014Nov 17, 2015Terumo Kabushiki KaishaIndwelling assembly
US9265915Sep 26, 2014Feb 23, 2016Terumo Kabushiki KaishaMethod of indwelling a needle assembly
US9352128Dec 26, 2014May 31, 2016Terumo Kabushiki KaishaIndwelling assembly
US9511207Oct 7, 2015Dec 6, 2016Terumo Kabushiki KaishaMethod involving use of an assembled indwelling assembly
US9700671Mar 29, 2016Jul 11, 2017Terum Kabushiki KaishaIndwelling assembly
US20040106852 *Nov 26, 2003Jun 3, 2004Boston Scientific CorporationGuidewire and catheter locking device and method
US20050065473 *Apr 23, 2004Mar 24, 2005Howard MartinIntraosseous needle
US20070191875 *Aug 29, 2006Aug 16, 2007Om Prakash RehilApparatus to facilitate penetration into a body cavity or lumen formed by body tissue, and method for using same
US20090062769 *Apr 10, 2008Mar 5, 2009Boston Scientific Scimed, Inc.Rapid exchange catheter converter
US20090287052 *May 18, 2009Nov 19, 2009Boston Scientific Scimed, Inc.Biopsy Cap Attachment and Integrated Locking Device
US20100081878 *May 18, 2009Apr 1, 2010Boston Scientific Scimed, Inc.Integrated Locking Device With Active Sealing
US20100160726 *Feb 26, 2010Jun 24, 2010Boston Scientific CorporationGuidewire and Catheter Locking Device and Method
US20100174139 *Mar 15, 2010Jul 8, 2010Boston Scientific Scimed, Inc.Guide Wire Insertion and Re-Insertion Tools and Methods of Use
US20110060315 *Nov 16, 2010Mar 10, 2011Boston Scientific Scimed, Inc.Multi-Size Convertible Catheter
US20130199703 *Feb 16, 2011Aug 8, 2013Michelin Recherche Et Technique S.A.Needle for Inserting a Wire Into a Tire
Cooperative ClassificationA61M25/0606