US789092A - Syringe. - Google Patents

Syringe. Download PDF

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Publication number
US789092A
US789092A US17691903A US1903176919A US789092A US 789092 A US789092 A US 789092A US 17691903 A US17691903 A US 17691903A US 1903176919 A US1903176919 A US 1903176919A US 789092 A US789092 A US 789092A
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United States
Prior art keywords
plunger
cylinder
tube
piston
syringe
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Expired - Lifetime
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US17691903A
Inventor
George A Hulett
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Individual
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Priority to US17691903A priority Critical patent/US789092A/en
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M5/31513—Piston constructions to improve sealing or sliding

Definitions

  • the invention relates to improvements in syringes; and it is the special object of the invention to obtain a simple and inexpensive construction which is particularly adapted for hypodermic injections.
  • the invention consists in the peculiar construction, arrangement, and combination of parts, as hereinafter set forth.
  • Figure 1 is a longitudinal section through the instrument.
  • Fig. 2 is a section showing the tube or cylinder in dotted lines.
  • Fig. 3 is an elevation of the device complete.
  • A is a cylinder or tube, preferably formed of glass, having one end contracted to form the nipple B.
  • the needle 0 may be secured by suitable cement D.
  • the plunger E Placed within the cylinder is the plunger E, which may be formed of wood or any other suitable material and is of a diameter slightly less than that of the tube.
  • the plunger-head or piston is the plunger-head or piston. This is formed of a compressible resilient substance and is of a conical form, the outer end being of a diameter which is slightly in excess of the diameter of the tube, so that it will be slightly compressed at its outer end when inserted into the cylinder.
  • the inner end is secured to the plunger E, preferably by forming a recess in the end of the latter and cementing or otherwise securing the parts together, so as to get a solid connection between the smaller end of the piston and its plunger.
  • the cylinder A is preferably formed at its outer end with a flaring flange G. This permits of inserting the plunger, as the large end thereof may be forced in the flaring end of the tube and in moving inward will be compressed until it snugly fits the tube or cylinder.
  • the liquid may be placed in the tube A, after which the plunger is inserted in the manner just described.
  • the compressible and resilient character of the plunger-head or piston F it will form an absolutely liquid-tight joint with the walls of the tube, and by being compressed between the material in front of the piston and the solid backing afforded by the plunger the length of the joint between the piston and its cylinder will be increased just in proportion to the force behind and the resistance of the material in front.
  • I obtain a packing for the piston which is always tight and automatically tightens in proportion to the pressure required to force the liquid out.
  • hat I claim as my invention is 1.
  • the combination with a cylinder of a plunger therefor comprising a shank having a converging head formed of resilient compressible material, secured at its smaller end to the inner end of said shank, the maximum diameter of said head being atits extreme outer end greater than the diameter of the cylinder and being adapted to be compressed to fit within said cylinder, substantially as and for the purpose described.
  • a hypodermic syringe comprising a tube partially closed at one end to form a nipple of tapering shape upon its interior, a needle within said nipple, and cement surrounding said needle Within the tapered portion of the nip- In testimony WhereofIatfix my signature in ple, to secure the same to said tube. presence of two witnesseses.

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Description

PATENTED MAY 2, 1905.
G. A. HULETT.
SYRINGE.
APPLICATION 21mm OOT. 13,1903.
TVA 027 60? ap g4; 17. f/uie (it MQOW W W Minn STATES Patented May 2, 1905.
GEORGE A. HULET'I, OF ANN ARBOR, MICHIGAN.
SYRINGE.
SPECIFICATION forming part of Letters Patent No. 789,092, dated May 2, 1905.
Application filed October 13, 1903. Serial No. 176,919.
To It 1071,0711, it may concern:
Be it known that I, GEORGE A. I-IULETT, a citizen of the United States, residing at Ann Arbor, in the county of Washtenaw and State of Michigan, have invented certain new and useful Improvements in Syringes,of which the following is a specification, reference being had therein to the accompanying drawings.
The invention relates to improvements in syringes; and it is the special object of the invention to obtain a simple and inexpensive construction which is particularly adapted for hypodermic injections.
The invention consists in the peculiar construction, arrangement, and combination of parts, as hereinafter set forth.
In the drawings, Figure 1 is a longitudinal section through the instrument. Fig. 2 is a section showing the tube or cylinder in dotted lines. Fig. 3 is an elevation of the device complete.
A is a cylinder or tube, preferably formed of glass, having one end contracted to form the nipple B. In this nipple the needle 0 may be secured by suitable cement D. Placed within the cylinder is the plunger E, which may be formed of wood or any other suitable material and is of a diameter slightly less than that of the tube.
F is the plunger-head or piston. This is formed of a compressible resilient substance and is of a conical form, the outer end being of a diameter which is slightly in excess of the diameter of the tube, so that it will be slightly compressed at its outer end when inserted into the cylinder. The inner end is secured to the plunger E, preferably by forming a recess in the end of the latter and cementing or otherwise securing the parts together, so as to get a solid connection between the smaller end of the piston and its plunger.
The cylinder A is preferably formed at its outer end with a flaring flange G. This permits of inserting the plunger, as the large end thereof may be forced in the flaring end of the tube and in moving inward will be compressed until it snugly fits the tube or cylinder.
In operation the liquid may be placed in the tube A, after which the plunger is inserted in the manner just described. On account of the compressible and resilient character of the plunger-head or piston F it will form an absolutely liquid-tight joint with the walls of the tube, and by being compressed between the material in front of the piston and the solid backing afforded by the plunger the length of the joint between the piston and its cylinder will be increased just in proportion to the force behind and the resistance of the material in front. Thus I obtain a packing for the piston which is always tight and automatically tightens in proportion to the pressure required to force the liquid out.
hat I claim as my invention is 1. The combination with a cylinder of a plunger therefor comprising a shank having a converging head formed of resilient compressible material, secured at its smaller end to the inner end of said shank, the maximum diameter of said head being atits extreme outer end greater than the diameter of the cylinder and being adapted to be compressed to fit within said cylinder, substantially as and for the purpose described.
2. The combination of a cylinder, of a plunger therefor a piston of resilient material of the form of a solid truncated cone having its smaller end secured to the inner end of the plunger, and its larger end extending beyond the sides of the plunger and fitting the cylinder, whereby when pressure is applied to the plunger, the joint formed between the piston and cylinder will-be tightened proportionate to the pressure on the plunger, and the resistance of the liquid.
3. The combination with a cylinder of a plunger therefor comprising a shank having an inner terminal recess and a head of compressible material, secured within the recess and extending at its outer end beyond the sides of the rod.
4:. A hypodermic syringe comprising a tube partially closed at one end to form a nipple of tapering shape upon its interior, a needle within said nipple, and cement surrounding said needle Within the tapered portion of the nip- In testimony WhereofIatfix my signature in ple, to secure the same to said tube. presence of two Witnesses.
5. The combination with a cylinder of a GEORGE A HULETT 4 plunger therefor comprising" a shank having a 5 tapered terminal recess, and a conical head of Witnesses:
resilient material fitted Within said recessed A. J. SAWYER, portion of the plunger. A. J. SAWYER, Jr.-
US17691903A 1903-10-13 1903-10-13 Syringe. Expired - Lifetime US789092A (en)

Priority Applications (1)

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US17691903A US789092A (en) 1903-10-13 1903-10-13 Syringe.

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US17691903A US789092A (en) 1903-10-13 1903-10-13 Syringe.

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US789092A true US789092A (en) 1905-05-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2538662A (en) * 1950-01-24 1951-01-16 Charles C Abbott Expendable valve unit for surgical appliances
US20140249470A1 (en) * 2011-11-16 2014-09-04 Lts Lohmann Therapie-Systeme Ag Cylinder-piston unit with multi-part piston

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2538662A (en) * 1950-01-24 1951-01-16 Charles C Abbott Expendable valve unit for surgical appliances
US20140249470A1 (en) * 2011-11-16 2014-09-04 Lts Lohmann Therapie-Systeme Ag Cylinder-piston unit with multi-part piston
US9302048B2 (en) * 2011-11-16 2016-04-05 Lts Lohmann Therapie-Systeme Ag Cylinder-piston unit with multi-part piston

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