Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
  • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
  • B05C17/00576—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container
• • 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
  • A61M2005/3101—Leak prevention means for proximal end of syringes, i.e. syringe end opposite to needle mounting end
• • 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
  • A61M2005/3117—Means preventing contamination of the medicament compartment of a syringe
  • A61M2005/3121—Means preventing contamination of the medicament compartment of a syringe via the proximal end of a syringe, i.e. syringe end opposite to needle cannula mounting end
• • 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
  • A61M2005/31506—Integral with the syringe barrel, i.e. connected to the barrel so as to make up a single complete piece or unit formed as a single piece, e.g. moulded
• • 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
  • A61M5/31515—Connection of piston with piston rod

Definitions

• the present invention relates to a cannula for dispensing fluid products, particularly medicinal pastes, ointments and creams or the like.
• Cannulas for dispensing medicinal fluid products are known which are used in particular for vaginal and anal applications and are generally sold in packages together with tubes or bottles that contain one of these products.
• Known cannulas are constituted by a cylinder that is adapted to contain the product and inside which a plunger can slide, said plunger being rigidly coupled to the end of a push rod.
• the cylinder has an open end that can be coupled to the outlet of the tube, in order to introduce in said cylinder the amount of product to be applied and through which the introduced product is dispensed.
• the opposite end of the cylinder is closed by a bottom provided with a hole in which the push rod is inserted slidingly, acting as an element for stopping the plunger in order to prevent its extraction.
• the product introduced in the cannula is dispensed by acting on the push rod in the direction in which the plunger slides toward the open end of the cylinder.
• cannulas which are constituted by a cylinder, in which the opposite ends are open and inside which a plunger is inserted slidingly, and by a push rod, which is separate from the plunger and can be coupled detachably thereto.
• abutment undercuts or shoulders At the opposite ends of the cylinder there are abutment undercuts or shoulders, which are adapted to stop the sliding of the plunger, preventing it from sliding out under the action of the push rod.
• cannulas can be sold in packages that contain a single push rod, a plurality of empty single-use cylinders to be used for the various applications, and one or more tubes of product.
• one of the two ends of the cylinders can be coupled to the outlet of the tube in order to introduce the product in the cylinders, while the opposite end acts as a passage for the push rod.
• these cannulas can be sold in packages that contain a single push rod and a plurality of cylinders that are already filled with the product to be applied and are provided, at their two opposite ends, with closure plugs that are removed at the time of use.
• the cylinders and plungers are in fact usually formed by molding polymeric materials in two parts that are mutually separate and are then assembled; this entails designing and manufacturing two different molds and laborious assembly operations, which have a negative effect on the production times and costs of the cannulas.
• the aim of the present invention is to eliminate the drawbacks noted above of known cannulas, by providing a cannula for dispensing fluid products, particularly medicinal pastes, ointments and creams or the like, that is structurally and constructively simpler, does not require additional assembly operations, allows to further contain production times and costs and to limit the waste of materials.
• an object of the present invention is to provide a structure that is simple, relatively easy to provide in practice, safe in use, effective in operation, and has a relatively low cost.
• the present cannula for dispensing fluid products which comprises an internally hollow cylindrical body that contains a fluid product and is provided at one end with an outlet for dispensing said product, which is associated with detachable closure means, and has a closure bottom at the opposite end, characterized in that it comprises means for the full and temporary coupling of said bottom to said body and a push rod that is detachably associable with said bottom, said full and temporary coupling means being suitable to release said bottom under the thrust of said rod entering said body and the uncoupled bottom being suitable to act as a plunger that can slide within said body in order to dispense the product from said outlet.
• Figure 1 is a front view of the cylindrical body of the cannula according to the invention.
• Figure 2 is a front view of the push rod of the cannula according to the invention
• Figure 3 is a longitudinal sectional view of the body of Figure 1
• Figure 4 is a longitudinal sectional view of the push rod of Figure 2;
• Figure 5 is an enlarged-scale longitudinal sectional view of an end of the body of Figure 1;
• Figure 6 is an enlarged-scale longitudinal sectional view of the cannula according to the invention during the association of the push rod with the bottom of the body;
• Figure 7 is an enlarged-scale longitudinal sectional view of the cannula according to the invention during the dispensing of the product.
• the reference numeral 1 generally designates a cannula for dispensing fluid products P, particularly medicinal pastes, ointments and creams or the like for vaginal or anal applications.
• the cannula 1 comprises a cylindrical body 2, which is internally hollow and contains a product P and is provided, at its opposite ends, respectively with an outlet 3 for dispensing the product P, which is associated with removable closure means such as, for example, a film 4 that can be removed by tearing, and with a closure bottom 5.
• the cannula 1 further comprises a push rod 6 that is detachably associable with the bottom 5.
• the bottom 5 is rigidly coupled to the body 2 by way of full and temporary coupling means 7, which are suitable to release it under the thrust of the rod 6 entering the body 2; at the end of the body 2, closed previously by the bottom 5, there remains an opening 8 for the passage of the rod 6.
• the bottom 5' uncoupled from the body 2 acts as a plunger that can slide within the body 2 under the thrust of the rod 6 in order to dispense the product P from the outlet 3 once the film 4 has been removed.
• the body 2 and the bottom 5 are formed monolithically together.
• the means 7 for full and temporary coupling are constituted by a ring 9 for joining the perimeter of the bottom 5 to the side walls of the body 2, along which there are portions that can tear under the thrust of the rod 6, such as for example prefracture lines, prescoring lines, or the like.
• the means 7 for full and temporary coupling can comprise a plurality of breakable bridges, whose opposite ends are schematically shown in the figure associated respectively with the bottom 5 and with the walls of the body 2.
• Mutually complementary coupling means are formed between an end 6a of the rod 6 and the face of the bottom 5 that is directed toward the outside of the body 2 and are constituted by respective protruding or male elements
• the end 6a of the rod 6 is constituted by a contoured head that is larger than the stem of said rod and can be inserted in a complementary containment cup 18 that protrudes from the face of the bottom 5 that is directed toward the outside of the body 2.
• the tooth 14 can flex elastically toward the inside of the body 2 in order to allow the insertion of the uncoupled bottom 5' in said body under the insertion thrust of the rod 6.
• the bottom 5 comprises a surface for abutment against the tooth 14 that is constituted by an annular portion 15 of its face that is directed toward the outside of the body 2.
• the bottom 5 further comprises lateral fins 16 for forming a seal with the internal walls of the body 2 whose diameter is on average greater than, or equal to, the inside diameter of said body so as to generate friction with it.
• the bottom 5 is constituted by a substantially cylindrical element, which comprises a longitudinal portion whose outside diameter gradually increases toward the outward face of the body 2; the lateral surface of said longitudinal portion is suitable to form the fins 16 and the base surface of said longitudinal portion is suitable to form the abutment surface 15.
• sealing means such as a band 17 that is perimetrically associated with the rim of the body 2 at the bottom 5.
• the film 4 is made to adhere to the perimetric edge of the outlet 3 by gluing or thermal bonding.
• the cannula 1 is sold ready for use in packages that contain one or more bodies 2, which are already filled with the product P and whose opposite ends are respectively closed by the film 4 and by the bottom 5, and a single rod 6 that can be used with the various bodies 2.
• the film 4 is removed, thus opening the outlet 3, the sealing band 17, if any, is eliminated, and the end 6a of the rod 6 is coupled to the bottom 5.
• the fins 16 slide in contact and hermetically against the internal walls of the body 2, avoiding losses of the product P through the opening 5.
• the outlet 3 is used, during the packaging of the cannula 1, to fill the body 2 with the product P; after this, the film 4, advantageously made of aluminum, is heat-sealed or glued to the perimetric rim of the outlet 3. In practice it has been found that the described invention achieves the intended aim and object.
• the cannula according to the invention is in fact constructively and structurally simpler than known ones and allows to further limit waste of materials and to contain production times and costs.
• the cylindrical body of the cannula according to the invention is in fact formed monolithically with the closure bottom, which performs the dual function of plug and pusher plunger; this allows to eliminate one of the two molds for forming the cylindrical body and the plunger of known cannulas, the additional operations for their assembly, and one of the two plugs for closing the cylindrical bodies already packaged with the product.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=11451134

Family Applications (1)

Country Status (6)

Cited By (8)

Citations (6)

• 2002
  • 2002-08-06 IT IT000221A patent/ITMO20020221A1/it unknown
• 2003
  • 2003-07-18 BR BRPI0313053A patent/BRPI0313053A2/pt not_active IP Right Cessation
  • 2003-07-18 JP JP2004526744A patent/JP2005534434A/ja active Pending
  • 2003-07-18 WO PCT/EP2003/007878 patent/WO2004014476A1/en not_active Ceased
  • 2003-07-18 EP EP03784027A patent/EP1526890A1/en not_active Withdrawn
  • 2003-07-18 AU AU2003258527A patent/AU2003258527A1/en not_active Abandoned

Patent Citations (6)

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