US3392724A - Oxygen inhalator - Google Patents

Oxygen inhalator Download PDF

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Publication number
US3392724A
US3392724A US448139A US44813965A US3392724A US 3392724 A US3392724 A US 3392724A US 448139 A US448139 A US 448139A US 44813965 A US44813965 A US 44813965A US 3392724 A US3392724 A US 3392724A
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US
United States
Prior art keywords
oxygen
pressure
gas
tube
inhalator
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
US448139A
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English (en)
Inventor
Cowley John James
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.)
THERAPEUTIC RES CORP Ltd
Original Assignee
THERAPEUTIC RES CORP Ltd
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 THERAPEUTIC RES CORP Ltd filed Critical THERAPEUTIC RES CORP Ltd
Priority to US448139A priority Critical patent/US3392724A/en
Priority to GB15731/66A priority patent/GB1111921A/en
Priority to DK190266AA priority patent/DK114292B/da
Priority to SE5058/66A priority patent/SE311288B/xx
Priority to NO162559A priority patent/NO119812B/no
Priority to DE19661491670 priority patent/DE1491670A1/de
Priority to BE679480D priority patent/BE679480A/xx
Priority to CH539866A priority patent/CH433023A/de
Priority to FI660953A priority patent/FI47268C/fi
Priority to NL6605028A priority patent/NL6605028A/xx
Application granted granted Critical
Publication of US3392724A publication Critical patent/US3392724A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/02—Valves
    • A62B9/022—Breathing demand regulators
    • 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
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/06—Respiratory or anaesthetic masks
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A62B18/10—Valves
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A62B7/02—Respiratory apparatus with compressed oxygen or air

Definitions

  • ABSTRACT OF THE DISCLOSURE A portable emergency oxygen inhalator incorporating its own permanently storable supply of oxygen in a tubular pressure vessel, a frangible seal for said vessel, and means for slowly releasing the gas at atmospheric pressure.
  • This invention relates to an individual oxygen inhalator device which is personally portable and available for instant emergency use and, in addition may be used as a short term resuscitator if assistance is available.
  • emergency oxygen inhalators such as those used for escape from burning buildings or other unbreathable atmospheres, and also those used for escape from very high altitude aircraft.
  • Such devices have usually centred around a cylindrical oxygen container of substantial size and volume and have incorporated regulator mechanism and a variety of different breathing devices permitting in some cases the inhalation of pure oxygen and in other cases the inhalation of a mixture of oxygen and air under pressure and in still other cases, of oxygen and atmospheric air, as available.
  • prior devices have proved entirely satisfactory for the purposes for which they were designed, they were in general suitable for use only by trained personnel such as remen or civil defence workers or trained airmen, and were entirely unsuitable for use by civilians or by the great majority of military personnel.
  • an objective of the invention to provide an oxygen inhalator apparatus having the foregoing advantages which also combines the function of a resuscitator apparatus for short periods if desired.
  • an objective of the in-vention to provide an oxygen breathing apparatus having the foregoing advantages comprising a small unit package wrapped land hermetically sealed for protection during storage and handling.
  • VMore particularly, it is an objective of the present invention to provide oxygen breathing apparatus :having the foregoing advantages incorporating a de-mand valve Iregulating flow of oxygen to the user to extend the useful life of the device.
  • uit is an objective lof the present invention to provide an oxygen breathing apparatus having the foregoing advantages wherein the act of opening the wrapper for the package automatically extends a face mask and simultaneously automatically breaks the seal of the oxygen pressure container and permits iiow lof oxygen therefrom.
  • FIGURE 1 is a perspective illustration of an oxygen breathing apparatus according to the invention partially cut-away to reveal the construction
  • FIGURE 2 is a sectional side elevation of the apparatus shown in FIGURE l along the line 2 2 of FIGURE 1;
  • FIGURE 3 is an enlarged perspective of a detail of the apparatus shown in FIGURE l exploded to reveal the construction thereof;
  • FIGURE 4 is a perspective illustration of the apparatus of FIGURE 1 folded and wrapped to form a single compact package
  • FIGURE 5 is an enlarged sectional view of a detail of FIGURE 1;
  • FIGURE 6 is an enlarged sectional view of a detail of FIGURE l.
  • FIGURE 7 is an enlarged sectional view of a detail of FIGURE 1;
  • FIGURE 8 is a sectional side elevation of a further embodiment showing an oxygen flow control valve of a design suitable for use in the invention.
  • FIGURE 9 is a side elevational view of an embodiment of a pressure indicating device suitable for use in association with the invention in some cases.
  • the pre- -ferred embodiment of the invention comprises a high pressure oxygen container consisting essentially of a length of cylindrical tubing 10 Wound upon itself in double spiral form to define a generally donut shaped structure adapted to contain oxygen under very high pressure of about 2,000 to 8,000 p.s.i. and providing endurance for ten t-o thirty minutes of normal inhalator use.
  • Tube 10 is preferably formed of thin metallic tape spirally wound and bonded in known manner to provide tubing of the greatest strength with the thinnest possible wall stmcture.
  • this tubular construction provi-des a pressure container having a very small diameter in relation to its volume hence reducing the unit hoop stress and hence reducing the Weight of metal required and in turn equalizing the fibre stress across the wall thickness.
  • This factor is further enhanced by the tape woun-d construction of the preferred embodiment leading to a molecule distribution around the circumference of the tube instead of along its length giving increased strength.
  • the coil of tubes 10 is preferably fitted Within and contained by the generally cylindrical container 11 having a back portion 12 and an open mouth portion 13, which is in turn provided with an annular retaining tiange 14 extending therearound for en- ⁇ gagement by and with the flexible rubber or plastic face mask 15 which is shaped and adapted to t over the nose and mouth of an adult person.
  • Oxygen is communicated from tubes 10 to the interior of face mask 15 by means -of a simplified pressure reducing system and ow of oxygen is partially regulated by means of a demand valve which also operates to mix the oxygen with air when a person breathes inwardly.
  • the pressure reducing mechanism consists essentially of capillary tube 16 communicating with one of tubes 10 and having a metering jet device 17 located therewithin which is dimensioned to permit only a very restricted flow of oxygen therethrough, preferably being in the region of about two to ⁇ four one thousandths of an inch in diameter.
  • Capillary tube 16 is extended away from tube 10 and is provided with 4a closed end 18 having a neck portion 19 of reduced diameter formed therein which is weakcned and adapted to be fractured easily to permit flow of oxygen to take place. Closed end 18 and neck portion 19 are completely enclosed within an over-size plastic sleeve 20 which is clamped firmly around tube 16 by means of clamping ring 21, the other end of tube 20 being closed. Tube 20 is preferably formed of relatively soft exble material such as to permit manipulation of end portion 18 and neck 19 on capillary tube 16 to permit the same to be readily broken.
  • a junction tube 22 of similar plastic mate-rial connects ⁇ from tube 20 with the raised block portion 23 fastened to the back wall 12 o-f container 11.
  • raised block portion 23 will in fact be of a thickness only slightly greater than the outside diameter of plastic tube 22, and is here shown greatly enlarged for the sake of clarity.
  • Block portion 23 is provided with a central opening 24 extending therethrough from front to back and making communication with a corresponding opening 25 formed in back Wall 12. Opening 25 is surrounded by an annular flange 26 which is provided on back wall 12 for making sealing engagement with the rubber expansion bag 27 which is provided for accumulating oxygen owing from tubes 10 continuously to provide a large volume low pressure storage of sufficient oxygen to be at least sufficient for one deep breath or inhalation.
  • Back portion 12 is also provided with a series of air entry ports 28 for admitting atmospheric air to the interior ⁇ thereof which are normally closed by the rubber yor plastic flap member 29 which is fastened to the inner side of back wall 12 and provides a simple form of yone way valve action.
  • Mixing of atmospheric air With oxygen is achieved by means of the diaphragm member 30 extending over substantially the entire inner surface of back wall 12 being raised upwardly over the block portion 23 and provided with a stiffened central disc portion 31 corresponding substantially to the diameter of block portion 23.
  • Disc portion 31 and diaphragm 30 are provided with a series of air and oxygen mixture passages 32 extending therethrough and on the interior of disc portion 31 there is provided the generally frusto conical valve member 33 shaped to' make sealing engagement with block portion 23 and normally closing central opening 24 thereof, the spring finger 34 or any lother suitable biasing means being provided to maintain the same in its normally closed position.
  • the biasing pressure of spring ringer 34 is very slight and such as may be readily overcome by a normal adult person inhaling within the face mask 15 thereby reducing the pressure therewithin and tending to raise diaphragm 30.
  • Such means comprise the extended wire arm member 35 which comprises one end of the hair spring 36 coiled around post 37 which is in turn fixed to bracket 38 which may be fastened in position by any suitable means within the interior of casing 11.
  • the free end of arm 35 is provided with an upstanding retaining pin 39 for engagement with any suitable means such as cardboard disc 40 which may be shaped and adapted to iit within the inner diameter of retaining flange 14 of housing 11 and provided with a tag 41. Removal of cardboard disc 40 will release arm 3S and spring 36 will thereupon swing arm 35 in an anti-clockwise direction braking closed end 18 of capillary tube 16.
  • any suitable covering means such as the plastic wrapper 42 may be provided for retaining face mask 15 in a closed infolded position, substantially as shown in FIGURE 4, and also for retaining expansion bag 27 in a folded or stored position and preventing darnage thereof.
  • Any suitable means such as a tear strip may be provided in wrapper 42 for facilitating the removal thereof in known manner.
  • a suitable valve means is shown in FIGURE 8 and may comprise an oversized sleeve portion 43 adapted to fit around the outside diameter of capillary tube 16 which may preferably be cut in two and contains within its interior a cylindrical ball bearing valve member 44 adapted to make sealing engagement with rubber O-ring 45 which abuts against an exposed end of capillary tubes 16 and which is urged into such sealing engagement by means of spring 46 which is itself retained in position within sleeve 43 by means of the other exposed end of capillary tube 16.
  • Valve member 44 is moved ofi O-ring 45 to permit fiow of oxygen by means of operating rod 46a extending upwardly through capillary tube 16 and provided with a manually operable pressure button (not shown) for depression of member 44.
  • a crude form of pressure indicating means may comprise a further capillary tube 47 communicating with the interior of tubes 10 from any suitable point therealong which is wound in the form of a spiral 48 and at its free end at the innermost point of spiral 48 is provided with a needle 49 which may indicate a position along a dial 50 if desired.
  • filling may be accomplished at one end of tubes 10 by means of a further capillary tube 51 the end of which is closed as by silver soldering at 52.
  • Bag 27 will have been released and unfolded by removal of wrapper 42 and will thereupon slowly fill and expand in response to the increasing volume of oxygen fiowing thereinto, such filling and expansion taking place within relatively short space of time.
  • the user as soon as cardboard disc 40 has been removed and disgarded will place the face mask which is then fully extended due to inherent resiliency over his nose and mouth and commence to breathe.
  • the instant device If it is desired to use the instant device as an emergency form of resuscitator then a second person or an assistant will be required, since in general, the patient who requires resuscitation will be incapable of assisting himself, and the assistant will go through the same steps as before for opening the package and extending the face mask 15. After this, he will place the face mask 15 firmly over the nose and mouth of the patient. and, as soon as bag 27 has become extended he may simply apply manual pressure to the same thereby forcing oxygen from bag 27 under pressure to overcome the spring biasing of finger 34 and raise diaphgram 30 and valve member 33 ofir block 23 and permit pure oxygen to flow through openings 32 into the lungs of the patient.
  • Gas inhalator apparatus and comprising:
  • conduit means connecting said accumulator means to the interior of said container.
  • Gas inhalator apparatus and comprising:
  • sealing means closing said vessel and. operable to permit liow of gas therefrom;
  • a gas accumulator communicating with said vessel for accumulating low pressure gas
  • conduit means connecting said accumulator means to the interior of said container
  • Gas inhalator apparatus as claimed in claim 2, including passageways formed in said diaphragm and spring means biasing said diaphragm to maintain said valve member in sealing engagement with said conduit.
  • Gas inhalator apparatus as claimed in claim 2, including a mouth-piece connected to said container around said open mouth.
  • Gas inhalator apparatus as claimed in claim 2, including one-way air valve means restricting escape of gas through said air intake means.
  • a capillary tube connected to said vessel
  • a gas accumulator communicating with said vessel for accumulating low pressure gas
  • valve means connected to said accumulator and biased to maintain same normally closed;
  • a capillary tube connected to said vessel for reducing pressure of gas owing therethrough at a reduced rate
  • Gas inhalator ⁇ apparatus as claimed in claim 8 including gas flow check valve means connected With said capillary tube.
  • Gas inhalator apparatus and comprising:
  • tubular pressure vessel for storage of said gas wound upon itself into substantially toroidal shape and' enclosing an interior open space
  • a capillary tube connected to said vessel for reducing pressure of gas flowing therethrough at a ⁇ reduced rate
  • a gas accumulator communicating through said enclosing means with said vessel by means of said capillary tube for accumulating low pressure gas iiowing therefrom and incorporating outlet openings for permitting escape of gas therefrom, and
  • closure means for said open side of said container connected to said manually operable breaking means.

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  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Medicine (AREA)
  • Biomedical Technology (AREA)
  • Anesthesiology (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
US448139A 1965-04-14 1965-04-14 Oxygen inhalator Expired - Lifetime US3392724A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US448139A US3392724A (en) 1965-04-14 1965-04-14 Oxygen inhalator
GB15731/66A GB1111921A (en) 1965-04-14 1966-04-07 A portable inhalator and respirator
SE5058/66A SE311288B (enrdf_load_html_response) 1965-04-14 1966-04-13
NO162559A NO119812B (enrdf_load_html_response) 1965-04-14 1966-04-13
DK190266AA DK114292B (da) 1965-04-14 1966-04-13 Transportabel inhalator, navnlig til inhalation af oxygen.
DE19661491670 DE1491670A1 (de) 1965-04-14 1966-04-13 Sauerstoff-Inhalator
BE679480D BE679480A (enrdf_load_html_response) 1965-04-14 1966-04-14
CH539866A CH433023A (de) 1965-04-14 1966-04-14 Atemvorrichtung
FI660953A FI47268C (fi) 1965-04-14 1966-04-14 Kannettava inhalaatio- ja tekohengityslaite.
NL6605028A NL6605028A (enrdf_load_html_response) 1965-04-14 1966-04-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US448139A US3392724A (en) 1965-04-14 1965-04-14 Oxygen inhalator

Publications (1)

Publication Number Publication Date
US3392724A true US3392724A (en) 1968-07-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
US448139A Expired - Lifetime US3392724A (en) 1965-04-14 1965-04-14 Oxygen inhalator

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US (1) US3392724A (enrdf_load_html_response)
BE (1) BE679480A (enrdf_load_html_response)
CH (1) CH433023A (enrdf_load_html_response)
DE (1) DE1491670A1 (enrdf_load_html_response)
DK (1) DK114292B (enrdf_load_html_response)
FI (1) FI47268C (enrdf_load_html_response)
GB (1) GB1111921A (enrdf_load_html_response)
NL (1) NL6605028A (enrdf_load_html_response)
NO (1) NO119812B (enrdf_load_html_response)
SE (1) SE311288B (enrdf_load_html_response)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3659589A (en) * 1969-09-15 1972-05-02 Jack R Lambert Spirograph mouthpiece
US3677267A (en) * 1966-09-30 1972-07-18 Siebe Gorman & Co Ltd Closed circuit breathing apparatus
US4552140A (en) * 1983-04-29 1985-11-12 Erie Manufacturing Co. Emergency escape device
USD283741S (en) 1983-04-29 1986-05-06 Erie Manufacturing Co. Portable oxygen reservoir
US4657027A (en) * 1984-02-04 1987-04-14 Ferring Biotechnik Gmbh Means for taking blood samples for the diagnosis of bodily functions
US5687713A (en) * 1991-11-29 1997-11-18 Bahr; Erik W. Breathing mask
US6543450B1 (en) * 1998-09-29 2003-04-08 John T. Flynn Survival mask
CN112006351A (zh) * 2020-09-10 2020-12-01 上海理工大学 折叠收纳带包装的口罩结构及具有清凉功能的夏季口罩
US11383108B2 (en) * 2018-07-25 2022-07-12 Safran Cabin Inc. Oxygen mask assembly with optimized package size

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8709729D0 (en) * 1987-04-24 1987-05-28 Gil Rodriguez J A Emergency breathing equipment
DE8909812U1 (de) * 1989-08-16 1989-10-05 Schreinemacher, Gottfried, 4190 Kleve Sauerstoff-Inhalationsgerät
DE4007274A1 (de) * 1990-03-08 1991-09-12 Planeta Hausgeraete Sauerstoff-kartusche zur speicherung und gesteuerten abgabe von sauerstoff fuer medizinische und/oder technische zwecke
DE4007361A1 (de) * 1990-03-08 1991-09-12 Planeta Hausgeraete Notfallbeatmungsgeraet zur beatmung mit sauerstoff
DE4208096A1 (de) * 1991-03-19 1992-09-24 Von Ardenne Inst Fuer Angewand Atemmaske
NO174767C (no) * 1991-11-29 1994-07-06 Erik W Bahr Pustemaske
DE19529322C1 (de) * 1995-08-09 1997-03-13 Gottfried Dr Med Feuchtgruber Verpackte Beatmungsmaske
CN104971418A (zh) * 2015-07-02 2015-10-14 范文杰 一种幼儿用多功能麻醉面罩

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2399643A (en) * 1943-04-10 1946-05-07 Kreiselman Joseph Resuscitator
US2420223A (en) * 1944-03-21 1947-05-06 Sparklets Ltd Atomizer
US2432627A (en) * 1940-03-07 1947-12-16 Margaria Rodolfo Breathing apparatus for respiration at high altitudes
US2577045A (en) * 1951-01-12 1951-12-04 Cornelius B Stout Gas inhaler applicator
US2733835A (en) * 1956-02-07 Dispensing valve for emergency oxygen cylinders
US2944546A (en) * 1954-08-24 1960-07-12 Z And W Mfg Corp Portable respirators for anesthesia and other purposes
GB843586A (en) * 1957-12-13 1960-08-04 Bendix Aviat Corp Respiratory device
US2970594A (en) * 1958-04-25 1961-02-07 Walter S Sutowski Respirator devices for administering oxygen or other gaseous agents
US3136312A (en) * 1964-06-09 Mask and reservoir with disposable container supply
US3208449A (en) * 1964-05-07 1965-09-28 Jr Roscoe G Bartlett Compact walk-around rebreathing device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733835A (en) * 1956-02-07 Dispensing valve for emergency oxygen cylinders
US3136312A (en) * 1964-06-09 Mask and reservoir with disposable container supply
US2432627A (en) * 1940-03-07 1947-12-16 Margaria Rodolfo Breathing apparatus for respiration at high altitudes
US2399643A (en) * 1943-04-10 1946-05-07 Kreiselman Joseph Resuscitator
US2420223A (en) * 1944-03-21 1947-05-06 Sparklets Ltd Atomizer
US2577045A (en) * 1951-01-12 1951-12-04 Cornelius B Stout Gas inhaler applicator
US2944546A (en) * 1954-08-24 1960-07-12 Z And W Mfg Corp Portable respirators for anesthesia and other purposes
GB843586A (en) * 1957-12-13 1960-08-04 Bendix Aviat Corp Respiratory device
US2970594A (en) * 1958-04-25 1961-02-07 Walter S Sutowski Respirator devices for administering oxygen or other gaseous agents
US3208449A (en) * 1964-05-07 1965-09-28 Jr Roscoe G Bartlett Compact walk-around rebreathing device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3677267A (en) * 1966-09-30 1972-07-18 Siebe Gorman & Co Ltd Closed circuit breathing apparatus
US3659589A (en) * 1969-09-15 1972-05-02 Jack R Lambert Spirograph mouthpiece
US4552140A (en) * 1983-04-29 1985-11-12 Erie Manufacturing Co. Emergency escape device
USD283741S (en) 1983-04-29 1986-05-06 Erie Manufacturing Co. Portable oxygen reservoir
US4657027A (en) * 1984-02-04 1987-04-14 Ferring Biotechnik Gmbh Means for taking blood samples for the diagnosis of bodily functions
US5687713A (en) * 1991-11-29 1997-11-18 Bahr; Erik W. Breathing mask
US6543450B1 (en) * 1998-09-29 2003-04-08 John T. Flynn Survival mask
US11383108B2 (en) * 2018-07-25 2022-07-12 Safran Cabin Inc. Oxygen mask assembly with optimized package size
CN112006351A (zh) * 2020-09-10 2020-12-01 上海理工大学 折叠收纳带包装的口罩结构及具有清凉功能的夏季口罩

Also Published As

Publication number Publication date
NL6605028A (enrdf_load_html_response) 1966-10-17
SE311288B (enrdf_load_html_response) 1969-06-02
BE679480A (enrdf_load_html_response) 1966-09-16
DE1491670A1 (de) 1969-06-26
DK114292B (da) 1969-06-16
FI47268C (fi) 1973-11-12
CH433023A (de) 1967-03-31
GB1111921A (en) 1968-05-01
NO119812B (enrdf_load_html_response) 1970-07-06
FI47268B (enrdf_load_html_response) 1973-07-31

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