US1157429A

US1157429A - Hypodermic syringe.

Info

Publication number: US1157429A
Application number: US86774814A
Authority: US
Inventors: Osborne H Sheppard
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-10-21
Filing date: 1914-10-21
Publication date: 1915-10-19
Anticipated expiration: 1932-10-19

Description

0. H. SHEPPARD.A

y HYPODEHMIC SYRINGE. APPLICATION HLED ocT.2x. 1914.

Patented Oct. 19, 1915.

L 'Unrrnn sfrafrns rarnnr ernten.

OSBORNE H. SHEPPARD, OF CHICAGO, ILLINOIS.

HYPODERMIC SYRINGE.

Application led ctober 21, 1914.

To all whom t may concern.'

Be it known that I, OsoRNn H. SHEP- rAnD, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in l-Iypodermic Syringes, of which the following is a specification.

My invention relates to improvements in hypodermic syringes, and has for its object the provision of an improved syringe of this character so constructed and arranged as to prevent the pasage of sediment from the charge in the syringe into the needle thereof.

Other objects will appear hereinafter.

The invention consists in the combinations and arrangements of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawing forming a part of this specification, and in which,

Figure 1 is an elevationof a syringe embodying my invention, and Fig. 2, an enlarged detail section throughV the needle end thereof.

The preferred form of construction as illustrated in the drawing comprises an ordi nary hypodermic syringe barrel 3 provided with the usual piston and operating means, as will be readily understood. This syringe is equipped with a perforated needle 4 adapted to be inserted under the skin of the mounted in a detachable cap 5 vwhich is provided with internal threads 6 adapted to engage a correspondingly threaded nipple on the syringe barrel in position to receive the charge from the syringe.V At its inner end 7, needle 4 is extended well into the opening in cap 5 and is provided with a spreading head or iiange 8, as shown in Fig. 2. By

this arrangement, it will be observed, that when the charge is forced out of the syringe barrel 3 through the hollow needle 4 a whirlpool will be formed in the cap 5 around the inwardly projecting end 7y of needle 4, said i lwhirlpool tending to throw any sediment in the charge outwardly against the sides of the cap down which said sediment will travel l.

into the space 9 below the inner end of needle 4 which thus constitutes a sediment well Y 'Copies of this patent may ne obtained for ve cents each', by addressing the Commissioner of Patents,k

Specification of Letters Patent.

Needle 4 is Patented Oct. 19, 1915.

Serial No. 867,748.

for the collection of any sediment in the syringe charge. The outwardly spreading head or flange 8 tends to prevent the passage of thissedilnent outwardly through the needle, as will be readily understood. I find that this arrangement prevents thedischarge of sediment into the needle and the consequent clogging and rusting thereof to such an extent that it is not necessary to employ the usual cleaning wires with the needle. I have also found that this arrangement tends to prevent the inclusion of air in the charge as it enters the patient which is an additional advantage from a medical point of view.

lfhile I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departl ing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having described my invention what I claim as new and desire to secure by Letters Patent is:

l. The combination with a hypodermicl syringe, of a needle projecting well into the f discharge end thereof and provided at its rounding it so'as to insure free circulation under said head, substantially as described. In testimony whereof I have signed my name to this specification in the presence of l two subscribing witnesses.

OSBORNE H. SHEPPARD. Vitnesses: v

Josi-IUA R. H. Po'r'rs, JANET E. FARRELL.

Washington, D. C.