US1961023A - Plunger for hypodermic syringes - Google Patents
Plunger for hypodermic syringes Download PDFInfo
- Publication number
- US1961023A US1961023A US701401A US70140133A US1961023A US 1961023 A US1961023 A US 1961023A US 701401 A US701401 A US 701401A US 70140133 A US70140133 A US 70140133A US 1961023 A US1961023 A US 1961023A
- Authority
- US
- United States
- Prior art keywords
- plunger
- hypodermic syringes
- container
- set forth
- lubricant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
-
- 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
-
- 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
- A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
- A61M5/2455—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened
- A61M5/2466—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened by piercing without internal pressure increase
- A61M2005/247—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened by piercing without internal pressure increase with fixed or steady piercing means, e.g. piercing under movement of ampoule
Landscapes
- 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
May 29, 1934. H. 0. WEST PLUNGER FOR HYPODERMIC SYRINGES Filed Dec. 7, 1933 Patented May 29, 1934 UNITED STATES PATENT OFFICE Claims.
This invention relates to improvements in rubber plungers of the type employed in hypodermic syringes. To facilitate movement of these plungers in their cylinders, it has been proposed to 5 incorporate a lubricant such as paraffin in the rubber composition, and it is common practice for the same purpose to provide the plungers with circumferential grooves for reception of a lubricating medium such as glycerine. When pressure is applied to plungers of this class, and particularly those having an incorporated lubricant, there frequently occurs a leakage of the liquid contents of the cylinder past the sides of the plunger, and I have discovered that this leakage is due to a cooking or angular displacement of the plunger in the cylinder and a resultant bypassing of the liquid through the aforesaid circumferential groove to the rear of the plunger. The principal object of the present invention is to provide a plunger of the stated character which while having the desirable lubricating features shall be constructed as to prevent bypass ing of the liquid past the plunger in the manner previously described.
In the attached drawing:
Figure 1 is a fragmentary sectional view of a cylindrical container adapted for use in a certain type of hypodermic syringe, a portion of the latter being shown in broken lines;
Fig. 2 is a view in perspective of a plunger made in accordance with my invention, and
Fig. 3 is a view in perspective of a modified form of plunger within the scope of my invention.
3 With reference to the drawing, 1 is a glass or other cylinder forming the body of the container. One end of this cylinder is closed by a rubber stopper 2, and in the opposite end is a plunger 3 adapted to slide in the cylinder to expel the liquid contents normally confined between the stopper 2 and the plunger 3. Containers of this type are adapted for use with hypodermic syringes comprising a casing or body portion 4 adapted to receive the container 1, and a double-ended needle 5 the inner end of which projects into the chamber of the casing 4, so that when the container 1 is inserted this end of the needle penetrates the stopper 2. At the opposite end of the casing 4 is slidably mounted a 50 plunger rod 6 through which pressure may be applied to the outer face of the plunger 3, as illustrated, to force the plunger toward the stopper 2, and to thereby eject the contents of the container through the needle 5. In this type of syringe, the plunger rod 6, by reason of its relatively loose mounting, is subject to displacement with respect to the axis of the container 1, and may thus come to bear against the plunger 3 adjacent the edge of the latter as illustrated. Under these conditions there is a tendency for the plunger to become displaced angularly in the cylinder as illustrated, and when the plunger is provided with a continuous circumferential groove, this groove forms a bypass channel through which the liquid contents of the container 1 are permitted to escape. This tendency to angular displacement of the plunger is particularly pronounced in plungers having an incorporated lubricant such as paraffin, as previously set forth.
In accordance with my invention, I may provide the plunger 3 in lieu of the continuous circumferential groove with an interrupted circumferential groove, such for example as illustrated at '7 in Figs. 1 and 2. The sections of this interrupted groove are separated by webs 8, the outer faces of which preferably lie flush with the cylindrical surface of the plunger. This interrupted groove provides the desirable recess for reception of the lubricant, but effectively prevents bypassing of the liquid contents of the container with which it is associated.
It is apparent that my invention in principle may find various embodiments, such for example as that illustrated in Fig. 3, wherein the cylindrical surface of the plunger is provided with a plurality of pits or recesses 9 arranged in one or more series extending around the circumference of the plunger. These recesses constitute pockets for the lubricant, which is desirable, but avoids the undesirable feature of the continuous circumferential recess, which as previously set forth is responsible under certain conditions for the escape of the contents of the syringe.
There may be other modifications without departure from the invention.
I claim:
1. A plunger of the type set forth consisting of a resilient substantially cylindrical body having in the side a plurality of recesses extending in a disconnected series around the circumference of the plunger.
2. A plunger of the type set forth consisting of a resilient substantially cylindrical body having in the side a plurality of circumferentially spaced recesses.
3. A plunger of the type set forth consisting of a resilient substantially cylindrical body of rubber having in the side thereof a plurality of circumferentially spaced recesses.
4. A flexible cylindrical plunger of the type set forth having in the side thereof a plurality of lubricant receiving circumferentially spaced recesses.
5. A plunger of the type set forth consisting of a resilient substantially cylindrical body of a rubber composition containing a lubricating constituent, said body having in the side thereof a plurality of circumferentially spaced recesses.
HERMAN 0. WEST.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US701401A US1961023A (en) | 1933-12-07 | 1933-12-07 | Plunger for hypodermic syringes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US701401A US1961023A (en) | 1933-12-07 | 1933-12-07 | Plunger for hypodermic syringes |
Publications (1)
Publication Number | Publication Date |
---|---|
US1961023A true US1961023A (en) | 1934-05-29 |
Family
ID=24817229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US701401A Expired - Lifetime US1961023A (en) | 1933-12-07 | 1933-12-07 | Plunger for hypodermic syringes |
Country Status (1)
Country | Link |
---|---|
US (1) | US1961023A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2531667A (en) * | 1947-12-01 | 1950-11-28 | Bernard J Brent | Method of and apparatus for administering repeated injections |
US2591046A (en) * | 1948-10-18 | 1952-04-01 | Frederick M Turnbull | Hypodermic syringe assembly |
US2832340A (en) * | 1957-03-26 | 1958-04-29 | American Home Prod | Syringe push rod |
US4299238A (en) * | 1980-06-24 | 1981-11-10 | Baidwan Balinderjeet S | Vented piston and push-rod subassembly for use in a syringe barrel |
EP0568321A2 (en) * | 1992-04-30 | 1993-11-03 | Takeda Chemical Industries, Ltd. | Prefilled syringe |
US5586975A (en) * | 1994-02-18 | 1996-12-24 | Takeda Chemical Industries. Ltd. | Air and liquid tight container with a slidable gasket |
WO2003051434A2 (en) * | 2001-12-19 | 2003-06-26 | Disetronic Licensing Ag | Administration device comprising an expulsion member and a stopper covering |
US20070060877A1 (en) * | 2005-08-13 | 2007-03-15 | Stefan Bassarab | Dual chamber container for lyophilization, process for the filling up and use thereof |
US20070129673A1 (en) * | 2005-08-13 | 2007-06-07 | Stefan Bassarab | Dual chamber container and process for its filling up |
WO2009067200A3 (en) * | 2007-11-19 | 2009-09-24 | Mallinckrodt Inc. | Fluid delivery system with multi-dose fluid source |
US20090285453A1 (en) * | 2008-01-09 | 2009-11-19 | Muquit Mohammad Abdul | Authentication device, authentication method, registration device and registration method |
US20130134188A1 (en) * | 2010-05-28 | 2013-05-30 | Yoshino Kogyosho Co., Ltd. | Cartridge-type dispenser |
-
1933
- 1933-12-07 US US701401A patent/US1961023A/en not_active Expired - Lifetime
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2531667A (en) * | 1947-12-01 | 1950-11-28 | Bernard J Brent | Method of and apparatus for administering repeated injections |
US2591046A (en) * | 1948-10-18 | 1952-04-01 | Frederick M Turnbull | Hypodermic syringe assembly |
US2832340A (en) * | 1957-03-26 | 1958-04-29 | American Home Prod | Syringe push rod |
US4299238A (en) * | 1980-06-24 | 1981-11-10 | Baidwan Balinderjeet S | Vented piston and push-rod subassembly for use in a syringe barrel |
US5865799A (en) * | 1992-04-30 | 1999-02-02 | Takeda Chemical Industries | Prefilled syringe |
EP0568321A3 (en) * | 1992-04-30 | 1994-01-12 | Takeda Chemical Industries Ltd | Prefilled syringe |
US5605542A (en) * | 1992-04-30 | 1997-02-25 | Takeda Chemical Industries, Ltd. | Prefilled syringe |
US5716339A (en) * | 1992-04-30 | 1998-02-10 | Takeda Chemical Industries, Ltd. | Prefilled syringe |
US5817056A (en) * | 1992-04-30 | 1998-10-06 | Takeda Chemical Industries, Ltd. | Prefilled syringe |
EP0568321A2 (en) * | 1992-04-30 | 1993-11-03 | Takeda Chemical Industries, Ltd. | Prefilled syringe |
US5586975A (en) * | 1994-02-18 | 1996-12-24 | Takeda Chemical Industries. Ltd. | Air and liquid tight container with a slidable gasket |
WO2003051434A2 (en) * | 2001-12-19 | 2003-06-26 | Disetronic Licensing Ag | Administration device comprising an expulsion member and a stopper covering |
WO2003051434A3 (en) * | 2001-12-19 | 2003-10-30 | Disetronic Licensing Ag | Administration device comprising an expulsion member and a stopper covering |
US20070060877A1 (en) * | 2005-08-13 | 2007-03-15 | Stefan Bassarab | Dual chamber container for lyophilization, process for the filling up and use thereof |
US20070129673A1 (en) * | 2005-08-13 | 2007-06-07 | Stefan Bassarab | Dual chamber container and process for its filling up |
US8002734B2 (en) | 2005-08-13 | 2011-08-23 | Boehringer Ingelheim International Gmbh | Dual chamber container and process for its filling up |
US8096971B2 (en) | 2005-08-13 | 2012-01-17 | Boehringer Ingelheim International Gmbh | Dual chamber container for lyophilization, process for the filling up and use thereof |
WO2009067200A3 (en) * | 2007-11-19 | 2009-09-24 | Mallinckrodt Inc. | Fluid delivery system with multi-dose fluid source |
US20100249586A1 (en) * | 2007-11-19 | 2010-09-30 | Cocker Robin C | Fluid Delivery System with Multi-Dose Fluid Source |
US8747356B2 (en) | 2007-11-19 | 2014-06-10 | Mallinckrodt Llc | Fluid delivery system with multi-dose fluid source |
US20090285453A1 (en) * | 2008-01-09 | 2009-11-19 | Muquit Mohammad Abdul | Authentication device, authentication method, registration device and registration method |
US20130134188A1 (en) * | 2010-05-28 | 2013-05-30 | Yoshino Kogyosho Co., Ltd. | Cartridge-type dispenser |
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