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
  • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
  • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
  • A61M5/321—Means for protection against accidental injuries by used needles
  • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
  • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
• • 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
  • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
  • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
  • A61M5/321—Means for protection against accidental injuries by used needles
  • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
  • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
  • A61M2005/3241—Needle retraction energy is accumulated inside of a hollow plunger rod

Definitions

• the present invention relates generally to protection against an accidental
• invention relates to a retractable needle syringe for protection from an accidental
• the present invention relates to an automatic
• U.S. Patent No. 5,209,739 discloses a hypodermic needle assembly and a
• a separate mechanical device must be independently operated by the
• European Patent No. 0 862 Al discloses a device in which a needle is
• the device requires the
• the elastic member is not
• the devices operate successfully, it has been found that the devices may have a
• the present invention relates to a disposable, single use syringe including
• a hollow body a retractable needle assembly positioned in the hollow body, and a
• the plunger assembly in the hollow body.
• the plunger assembly includes an elongated frame portion extending between a sealing platform and a catch platform and
• the sealing platform defining at least one guide track between the platforms.
• a retraction member is releasably secured to
• a retention member extends between the retraction member and the catch member.
• assembly depends from the catch platform and is configured to receive and secure
• the retraction member have complimentary mating members, whereby the tension
• Figure 1 is an expanded view of a syringe assembly in accordance with the
• Figure 2 is a cross sectional view of the preferred syringe barrel.
• Figure 3 is an exploded view of the closed end of the syringe barrel of
• Figure 4 is a side elevation of the needle assembly.
• Figure 5 is an isometric view of the preferred plunger assembly of the
• Figure 6 is a cross sectional view of the plunger frame of the plunger
• Figure 7 is an exploded view of the sealing end of the plunger frame of
• Figure 8 is a cross sectional view of the plunger assembly along the line 8-8
• Figure 9 is an exploded view of the retention end of the plunger assembly
• Figure 10 is a side elevation view of the preferred mandrel of the present
• Figure 11 is a side elevation view of the preferred catch plate of the present
• Figure 12 illustrates the preferred syringe in an assembled but unused
• Figure 13 illustrates the syringe of Figure 12 upon initial substantial
• Figure 14 illustrates the syringe of Figure 12 after loading of the syringe.
• Figure 15 illustrates the forward portion of the syringe of Figure 12 as it is
• Figure 16 illustrates the forward portion of the syringe of Figure 12 upon
• Figure 17 illustrates the forward portion of the syringe of Figure 12 after the mandrel tip has entered the needle assembly cavity.
• Figure 18 illustrates the forward portion of the syringe of Figure 12 upon
• Figure 19 illustrates the syringe of Figure 12 after retraction of the needle
• Figure 20 shows the plunger assembly members formed from the first
• Figure 21 shows the plunger assembly as formed from the second injection
• the syringe assembly 8 is comprised generally
• the cap member 10 includes an open, mating end 12 and a closed cone
• the mating end 12 is preferably configured to slidingly engage the
• the mating end 12 may be provided with threads
• the closed cone section 14 preferably includes a plurality of ribs
• the syringe barrel 40 is comprised of a hollow
• stabilized grip member 56 extends from the body 42 proximate, but forward the
• the grip member 56 may have various configurations, the preferred
• the open end 54 defines an open cavity 58 rear of the internal annular shoulder 60.
• An internal annular lip 62 may also be provided adjacent the open end 54.
• the closed end 44 is defined by a truncated cone 46 which includes a
• a retaining groove 50 that retains the
• needle assembly 70 in position during use as will be described in more detail
• the needle assembly 70 is comprised of a needle 72
• the interior passage 78 of needle assembly 70 communicates with the
• the cavity 80 has
• the needle 72 is positioned within the syringe barrel 40 such that the needle 72 extends
• the plunger assembly 100 includes a
• plunger frame 110 a retraction assembly 160, a thumb pad 104 and a sealing
• the plunger frame 110 includes a retention end 114 and a sealing
• opposed connecting rods 126 define opposed retraction assembly guide tracks 128.
• the sealing end 130 includes an apertured shelf 132 extending between the
• the apertures are preferably
• the aperture 140 is preferably tapered
• annular ring 142 extends into the aperture 140
• An external annular retaining ring 136 is
• the retention end 114 of plunger frame 110 includes
• An annular thumb pad retaining ring 117 extends about the terminating
• a guide member 118 may extend outward from each
• the preferred retention assembly 120 includes a pair of opposed L-
• each L-shaped member having a beveled catch 124 extending
• Each component of the plunger frame 110 is preferably manufactured from
• polypropylene or glass filled polypropylene Other materials, including various combinations
• plunger sealing member 150 is positioned about the
• the sealing member 150 includes annular seals 152 and 154 at
• annular seal 152 sealingly
• Annular seal 154 may also sealingly engage
• the hollow body 142 may also include a passage to prevent creating a vacuum
• the sealing member 150 is preferably manufactured
• Shell Oil A preferred material is KratonTM G2706 manufactured by Shell Oil. As
• the sealing member 150 is preferably
• the retention end 114 of plunger frame 110 can be utilized with the
• terminating plate 116 only. However, it is preferable to provide a thumb pad 104
• the thumb pad 104 is also preferably manufactured from an elastomer
• thumb pad 104 be overmolded directly in position, but it too may be manufactured
• the retention assembly 160 includes a mandrel 170, a catch
• the shaft portion 180 includes a plurality of barbs
• annular stop 184 extends about the cylindrical body 172
• the stop 184 is preferably elastomeric and therefore is
• the catch plate 190 includes an elongated
• barbs 196 or the like extending therefrom for retaining the resilient member 164.
• a second shaft 198 extends from the opposite side of the elongated plate 192 and
• the tip 200 is configured
• the mandrel 170 and the catch plate 190 are preferably manufactured from
• the resilient member 164 extends between the mandrel 170 and the catch
• the resilient member 164 is manufactured from a resilient material
• the resilient member 164 is preferably manufactured from KratonTM. In the preferred method of manufacture described
• the resilient member 164 is formed between the mandrel 170 and the catch
• member 10 may be mated with the closed end 44 of the syringe barrel 40 either
• the plunger assembly 100 is assembled by assembling the plunger frame
• the resilient member 164 is preferably molded directly to the mandrel 170 and catch plate 190, to form
• the resilient member 164 is
• the mandrel 170 is
• the mandrel retaining ring 178 forms a fluid tight seal with the
• the resilient stop 184 abuts against the rear surface of the shelf 132,
• seal provided by the resilient stop 184 helps prevent air or other materials from be
• the plunger assembly 100 is ready to be
• the plunger assembly 100 is inserted.
• the plunger assembly 100 is inserted approximately half-way into
• the catch plate 190 can be secured to the retention assembly 120 prior to packaging, whereby the syringe 8 would have
• thumb pad 104 to depress the plunger assembly 100 into the syringe barrel 40 with
• resilient member 164 begins to stretch and tension. As travel continues forward,
• the catch plate geometrically configured tip 200 mates with and is retained by the
• resilient member 164 is thereby tensioned in a loaded condition between the
• an audible "click” may occur to provide a signal of proper
• the syringe 8 can be loaded in a typical fashion by removing the cap 10, inserting the needle 42 into a desired vial
• the device 8 is ready for injection of the needle 72 into the patient.
• the resilient member 164 is tensioned between two fixed components
• the mandrel tip 176 begins to enter the needle assembly cavity 80.
• first annular seal 152 meets and is deflected by
• the needle assembly 70 is permitted to pass the deflected annular seal 152 into the
• the second annular seal 154 may remain
• annular seal 154 may
• the mandrel tip 176 passes through the needle assembly cavity cylindrical
• portion 80a into the geometrically configured cavity hemispherical portion 80b
• the thumb pad 104 enters the open cavity 58 at the end of the syringe barrel
• the thumb pad 104 is manufactured from a
• the thumb pad 104 preferably has a semi-domed configuration which enhances its inaccessibility.
• thumb pad 104 is preferably inserted past the inner annular lip 62
• the plunger frame 110 components (the retention end 114, the sealing end
• the catch plate 190 in a single shot of the desired material, in the preferred
• polypropylene polypropylene.
• the resultant component is shown in Figure 20.
• catch plate 190 are then positioned in a second mold cavity. Using a
• KratonTM the resilient member 164, stop 184, sealing member 150
• thumb pad 104 are formed directly over the corresponding parts of the plunger
• the runners 210 can be trimmed between the catch plate 190 and the connecting
• plunger assembly 100 is ready for use in accordance with the above.

Landscapes

• Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• Heart & Thoracic Surgery (AREA)
• Vascular Medicine (AREA)
• Anesthesiology (AREA)
• Biomedical Technology (AREA)
• Environmental & Geological Engineering (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)

Applications Claiming Priority (1)

Publications (1)

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ID=22274289

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Family Applications After (1)

Country Status (5)

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• 1999
  • 1999-12-13 WO PCT/US1999/029541 patent/WO2001041843A1/en not_active Ceased
  • 1999-12-13 CA CA002394328A patent/CA2394328A1/en not_active Abandoned
  • 1999-12-13 EP EP99966178A patent/EP1239904A1/de not_active Withdrawn
  • 1999-12-13 AU AU21787/00A patent/AU2178700A/en not_active Abandoned
  • 1999-12-13 JP JP2001543187A patent/JP2003516195A/ja active Pending
• 2000
  • 2000-12-13 EP EP00989257A patent/EP1239900A4/de not_active Withdrawn
  • 2000-12-13 JP JP2001543174A patent/JP2003521974A/ja active Pending
  • 2000-12-13 CA CA002394351A patent/CA2394351C/en not_active Expired - Fee Related
  • 2000-12-13 WO PCT/US2000/033897 patent/WO2001041830A2/en not_active Ceased
  • 2000-12-13 AU AU25792/01A patent/AU782441B2/en not_active Ceased

Non-Patent Citations (1)

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