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
  • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
  • A61M5/2033—Spring-loaded one-shot injectors with or without automatic needle insertion
• • 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
  • A61M5/31501—Means for blocking or restricting the movement of the rod or piston
  • A61M5/31505—Integral with the syringe barrel, i.e. connected to the barrel so as to make up a single complete piece or unit
• • 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
  • A61M5/3129—Syringe barrels
  • A61M5/3137—Specially designed finger grip means, e.g. for easy manipulation of the syringe rod
  • A61M2005/3139—Finger grips not integrally formed with the syringe barrel, e.g. using adapter with finger grips

Definitions

• the present invention relates to a syringe for the dispensing of fluids.
• the syringes of known type consist of a syringe body, of tubular shape, inside which slides a piston.
• the sliding of the piston obtained by operation of a rod, pushes the fluid contained in the syringe body to exit through a dispensing mouth.
• the syringes of known type are used in many fields of medicine, e.g., to administer a medical fluid to a patient or simply to transfer it from a medical device, such as a bag, a circuit or the like, to another one.
• the syringes are connected to a system of administration of a drug in powder and the fluid contained in them is nothing but air, intended to serve as the vehicle carrying the powder.
• the forward stroke of the piston determines the volume of air which is moved but the force and speed with which the piston is pushed determine significant changes in the type of air flow exiting from the syringes.
• the air flow can be more or less capable of carrying powder and, in many circumstances, the amount of drug carried by air varies inconveniently from case to case.
• the main aim of the present invention is to provide a syringe for the dispensing of fluids capable of meeting this need.
• Another object of the present invention is to provide a syringe for the dispensing of fluids which overcomes the above mentioned drawbacks of the prior art in the ambit of a simple, rational, easy and effective to use as well as low cost solution.
• the above mentioned objects are achieved by the present syringe for the dispensing of fluids according to claim 1.
• Figure 1 is an exploded view of the syringe according to the invention
• Figure 2 is a sectional view of the syringe according to the invention.
• Figures 3 to 5 show, in a succession of axonometric views, the operation of the syringe according to the invention.
• a syringe for the dispensing of fluids.
• the fluid dispensed from syringe 1 may be any substance in the liquid or gaseous state, or a viscous product, e.g. in the state of paste and gel, or powder, particularly very fine powders with great smoothness.
• the syringe 1 is intended to contain and move air and is connected to a circuit C for the administration of a drug in powder, which exploits the air coming from the syringe as a powder carrying vehicle.
• the syringe 1 comprises:
• syringe body 2, 3 containing the fluid and having at least a dispensing mouth 4 of the fluid itself;
• the syringe body 2, 3 comprises, in turn, a tubular element 2 which extends along a longitudinal axis A and has a first axial extremity 2a, in correspondence to which is obtained the mouth 4, and a second axial extremity 2b, opposite the first, having an introduction opening 9 of the piston element 5, 6, 7.
• the mouth 4 consists of a spout for coupling to the circuit C, but it is easy to understand that the shape and sizes of mouth 4 can be changed according to the type of use and coupling.
• the syringe body 2, 3 also comprises a base element 3 associated with the second axial extremity 2b and having a first abutment surface 10 for the elastic means 8.
• the base element 3 comprises a collar 11 which can be fitted on the second axial extremity 2b.
• the collar 11 has first coupling seats 12 which may be engaged with as many first coupling catches 13 obtained on the second axial extremity 2b.
• the base element 3 also comprises a first gripping bracket 14 which extends transversally with respect to the tubular element 2.
• the first gripping bracket 14 in practice, consists of a plate which extends outwards with respect to the collar 11, to allow the grip by the user, and also partly inwards of the collar 11, defining the first abutment surface 10.
• the tubular element 2 and the base element 3 are conveniently made separately, e.g. by injection molding of plastic material, and subsequently assembled.
• the piston element 5, 6, 7 comprises a piston body 5 intended to come into sliding contact with the internal surface of the tubular element 2, ensuring its seal.
• the piston body 5 e.g., consists of a disk having a first face 15 facing the fluid to be dispensed contained in the syringe body 2, 3, and a second face 16 opposite the first one.
• the piston element 5, 6, 7 also comprises a thrust rod 6, which is associated with the piston body 5 and which, in assembly configuration, protrudes from the tubular element 2 through the introduction opening 9 for the operation of the piston element 5, 6, 7 by the user.
• the thrust rod 6 is joined to the second face 16 of the piston body 5.
• the piston element 5, 6, 7 comprises a second abutment surface 17 for the elastic means 8.
• the second abutment surface 17 is obtained on a portion of the piston body 5 and, in particular, coincides with the second face 16.
• the piston element 5, 6, 7 also comprises a second gripping bracket 7 which is gripped by the user and which extends transversally with respect to the thrust rod 6.
• the second gripping bracket 7 is associable with the extremity of the thrust rod 6 opposite the piston body 5 and has second coupling catches 18 which may be engaged in as many second coupling seats 19 formed on the thrust rod 6.
• the piston body 5 and the thrust rod 6 are usefully made in a single body piece, e.g. by injection molding of plastic material.
• the second gripping bracket 7 is obtainable e.g. by injection molding of plastic material, separately from the piston body 5 and the thrust rod 6, with which it is assembled subsequently.
• the elastic means 8 are able to push the piston element 5, 6, 7 along the syringe body 2, 3 in the direction of outflow of the fluid through the mouth 4.
• the elastic means 8 are arranged to produce a force of the elastic type that tends to counteract the removal of the piston element 5, 6, 7 from the syringe body 2, 3, when the user moves the piston element 5, 6, 7 to suction the fluid, and that takes back the piston element 5, 6, 7 towards the mouth 4 when the user releases it.
• the elastic means 8 comprise at least a helical spring 20 arranged around the thrust rod 6 and having a first ending part 20a stopping against the first abutment surface 10 and a second ending part 20b, opposite the first, stopping against the second abutment surface 17.
• the syringe 1 is advantageously equipped with temporary locking means 21, 22, 23 for the temporary locking of the piston element 5, 6, 7 in a charging configuration of the elastic means 8 wherein, even if the user releases the thrust rod 6, the helical spring 20 remains charged and the piston element 5, 6, 7 does not slide along the syringe body 2, 3.
• the temporary locking means 21, 22, 23 comprise:
• transversal shoulder 21 which is obtained onto at least one of the base element 3 and the thrust rod 6 and on which there is at least a groove 22;
• the transversal shoulder 21 is obtained on the base element 3 and has two grooves 22, which are engageable by two corresponding ribbings 23 obtained on the thrust rod 6.
• the ribbings 23 extend longitudinally to the thrust rod 6, on opposite sides of the same and for a portion of length corresponding to the effective stroke of the piston element 5, 6, 7.
• the thrust rod 6 can slide longitudinally with respect to the syringe body 2, 3 and the piston element 5, 6, 7 is pushed by the elastic means 8 carrying the piston body 5 in the proximity of the mouth 4.
• the ribbings 23 slide longitudinally inside the grooves 22 until they protrude completely from the syringe body 2, 3.
• the base element 3 and the thrust rod 6 are reciprocally rotatable around the longitudinal axis A for the alignment/misalignment of the grooves 22 and the ribbings 23.
• the user When the dispensing of fluid is required, the user operates on the second gripping bracket 7 and rotates the thrust rod 6 without applying any longitudinal force. During rotation, therefore, the ribbings 23 slide on the transversal shoulder 21 until reaching the position of alignment with the grooves 22 when, due to the elastic means 8, the piston element 5, 6, 7 snaps longitudinally.

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)
• Materials For Medical Uses (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49354810

Family Applications (1)

Country Status (3)

Families Citing this family (2)

Family Cites Families (3)

• 2013
  • 2013-09-09 IT IT000247A patent/ITMO20130247A1/it unknown
• 2014
  • 2014-09-03 WO PCT/IB2014/064229 patent/WO2015033280A1/en not_active Ceased
  • 2014-09-03 EP EP14777848.4A patent/EP3043844A1/de not_active Withdrawn

Non-Patent Citations (2)

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