US3368559A - Hypodermic injector with safely held release means - Google Patents

Hypodermic injector with safely held release means Download PDF

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Publication number
US3368559A
US3368559A US488055A US48805565A US3368559A US 3368559 A US3368559 A US 3368559A US 488055 A US488055 A US 488055A US 48805565 A US48805565 A US 48805565A US 3368559 A US3368559 A US 3368559A
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US
United States
Prior art keywords
shaft
detent
spring
hypodermic
vial
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
Application number
US488055A
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English (en)
Inventor
Stanley J Sarnoff
George B Calkins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US488055A priority Critical patent/US3368559A/en
Priority to IL25960A priority patent/IL25960A/en
Priority to NL6610034A priority patent/NL6610034A/xx
Application granted granted Critical
Publication of US3368559A publication Critical patent/US3368559A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M2005/206—With automatic needle insertion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/11—Tripping mechanism
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents

Definitions

  • the invention relates to improvements in the release mechanism of the hypodermic syringe disclosed and claimed in that patent.
  • hypodermic syringe comprises a hypodermic injector which can be carried on the person of the user with the needle thereof in a sheathed condition, the device being quickly and easily releasable by removing a safety pin and pressing a tube holding a medicament vial against the portion of the body which is to receive the medicament, while grasping an outer sleeve, the relative movement of sleeve and tube causing the needle to automatically move rapidly outwardly from the tube under the influence of a spring and the medicament in the vial to be ejected through the needle.
  • This spring is normally retained under compression by a detent within the device.
  • FIG. 1 is a cross-sectional view of an improved hypodermic injector, the spring thereof being shown in released position and the injector incorporating the detent means of this invention;
  • FIG. 2 is a plan view of one form of detent forming part of the invention.
  • FIG. 3 is a plan view of a second form of detent forming part of the invention.
  • FIG. 4 is a diagrammatic view illustrating the position of parts with the detent, such as the flat detent of FIG. 2, partially operated for release of the spring.
  • vial holder structure herein may be made very similar to that shown in the Sarnoff et al. patent previously referred to, though the precise structure of vial holder therein is not the essence of the invention; any form of holder for vial and spring is suitable, so long as a shoulder is provided for detent engagement.
  • the main difference, it will be noted, is in the configuration of a detent shaft and its action.
  • FIG. 1 discloses in cross section and in released condition of the spring, an outer sleeve or sheath of plastic or metal open at the lefthand end and closed, except for a perforation 12, at the righthand end 14.
  • Telescopingly mounted in the outer sleeve is a tube 16, also of plastic or metal, secured in any convenient manner to a metallic spring housing 18, open at the lefthand end 20 and closed by a collar 21 at the righthand end, except for a perforation 22, for the passage therethrough of a detent portion of the novel shaft to be described.
  • the tube 16 is closed at the lefthand end, except for a perforation 24, to permit extrusion of the needle 26.
  • a vial 28 shown in FIG. 1 as emptied of its contents, the vial being provided with a rubber stopper 30, penetrated by the hollow needle, the needle having been driven through the rubber stopper and the contents of the vial having been ejected through a passageway in the needle by reason of a piston 32 within the vial having been driven to the left.
  • the drive of piston 32 was effected by displacement of disc member 34, the disc being driven by the spring seat end 36 of a shaft 38, shaft 38 being driven in turn by reason of release of compression of a helical spring 40.
  • the spring reacted between the spring seat on the shaft and the inside face of collar 21.
  • the shaft as shown. in FIG.
  • the shaft 38 is cylindrical; the seat 36 is a circular flange and the detent end of the shaft is provided with a conical portion 44 and a slotted portion 46 extending completely through the shaft, the slot in the shaft extending but a short distance above the cone and a much longer distance below the cone.
  • the cone has its conical portion 44 diverging away from the axis of the shaft in the direction of the seat and thereis a surface 50' extending outwardly from the shaft. This surface is normally parallel to and engages the upper surface of the collar 21 when the spring is under compression and the device cocked for operation.
  • integral hollow bridging neck portion 52 of the shaft may extend thru aperture 12 in the outer sleeve to receive a locking pin (not shown) inserted into the device to prevent inadvertent unseating of the detent and release of the needle and medicament.
  • the same maye be made of a flat bar, as bar 54, rectangular in cross section, thereby saving material.
  • the neck or bridge piece 56 is hollow and cylindrical to permit insertion of the locking pin referred to hereinabove.
  • the entire shaft, including the bridge piece at the end of the slotted portion may be fiat.
  • a spring propelled control element for a hypodermic injector comprising a shaft of resilient material, a spring seat at one end of the shaft, a detent adjacent to but removed from the other end of the shaft, said detent having a sloping surface diverging in a direction toward the spring seat and a second surface intersecting the first surface and extending laterally from the shaft, said shaft being slotted longitudinally of the shaft from a point close to but not at said one end of the shaft and closer to said one end than the second surface, to a second point along the shaft beyond said second surface, said slotted portion of the shaft from the second intersecting surface level to the second point being longer than the remainder of the s'otted portion.
  • a spring propelled control element for a hypodermic injector comprising a shaft of resilient material, a spring seat at one end of the shaft, a slotted portion in the shaft extending from adjacent one end of the shaft but removed from the end thereof and extending toward the spring seat, a detent on the shaft adjacent to said one end of the shaft and positioned intermediate the length of the slotted portion, said detent comprising a surface sloping divergently in the direction of the spring seat end of the shaft and a second surface intersecting the first surface and extending laterally from the shaft, the slotted portion between the second surface and the seat end of the shaft being longer than the remaining portion.
  • detent is in the form of a frustum of a cone with the slotted portion passing through the frustum of the cone.
  • a holder for said vial said holder mounting a driving spring positioned for urging said piston outwardly, and means for releasably holding said driving spring in a compressed condition
  • saidmeans comprising a shaft of resilient material, a seat seating said driving spring at one end of the shaft, a detent on said shaft close to the other end of the shaft and engageable with but releasable from a portion carried by the holder, said detent having a sloping surface diverging in a direction toward the spring seat and a second surface intersecting the first surface and extending laterally from the shaft, said shaft being slotted longitudinally of the shaft from a point close to but not at said one end of the shaft, and closer to said one end than the second surface, to a second point along the shaft beyond said second surface, said slotted portion of the shaft from the second intersecting surface level to the second point being longer than the remainder of the slotted portion, and means engaging the sloping surface to move it toward the axis of the shaft to unseat the detent

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)
US488055A 1965-09-17 1965-09-17 Hypodermic injector with safely held release means Expired - Lifetime US3368559A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US488055A US3368559A (en) 1965-09-17 1965-09-17 Hypodermic injector with safely held release means
IL25960A IL25960A (en) 1965-09-17 1966-06-13 Hypodermic injector with safety held release means
NL6610034A NL6610034A (enrdf_load_stackoverflow) 1965-09-17 1966-07-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US488055A US3368559A (en) 1965-09-17 1965-09-17 Hypodermic injector with safely held release means

Publications (1)

Publication Number Publication Date
US3368559A true US3368559A (en) 1968-02-13

Family

ID=23938152

Family Applications (1)

Application Number Title Priority Date Filing Date
US488055A Expired - Lifetime US3368559A (en) 1965-09-17 1965-09-17 Hypodermic injector with safely held release means

Country Status (3)

Country Link
US (1) US3368559A (enrdf_load_stackoverflow)
IL (1) IL25960A (enrdf_load_stackoverflow)
NL (1) NL6610034A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3556100A (en) * 1968-08-02 1971-01-19 Ampoules Inc Ampoule applicator
EP0182682A1 (fr) * 1984-10-18 1986-05-28 Jean André Henri Reveillon Dispositif à injections parentérales
US5309787A (en) * 1991-04-29 1994-05-10 Ina Walzlager Schaeffler Kg Locking pin for securing a shift linkage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR955180A (enrdf_load_stackoverflow) * 1950-01-10
US2832339A (en) * 1953-09-02 1958-04-29 Potter Pharmaceutical Corp Hypodermic injector
US2871856A (en) * 1954-10-27 1959-02-03 Astra Ab Hypodermic syringe
US3320955A (en) * 1963-10-09 1967-05-23 Sarnoff Stanley Jay Automatic injection hypodermic syringe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR955180A (enrdf_load_stackoverflow) * 1950-01-10
US2832339A (en) * 1953-09-02 1958-04-29 Potter Pharmaceutical Corp Hypodermic injector
US2871856A (en) * 1954-10-27 1959-02-03 Astra Ab Hypodermic syringe
US3320955A (en) * 1963-10-09 1967-05-23 Sarnoff Stanley Jay Automatic injection hypodermic syringe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3556100A (en) * 1968-08-02 1971-01-19 Ampoules Inc Ampoule applicator
EP0182682A1 (fr) * 1984-10-18 1986-05-28 Jean André Henri Reveillon Dispositif à injections parentérales
US5309787A (en) * 1991-04-29 1994-05-10 Ina Walzlager Schaeffler Kg Locking pin for securing a shift linkage

Also Published As

Publication number Publication date
IL25960A (en) 1970-04-20
NL6610034A (enrdf_load_stackoverflow) 1967-03-20

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