US3773466A - Arrangement for a steam-heated autoclave - Google Patents

Arrangement for a steam-heated autoclave Download PDF

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Publication number
US3773466A
US3773466A US00161760A US3773466DA US3773466A US 3773466 A US3773466 A US 3773466A US 00161760 A US00161760 A US 00161760A US 3773466D A US3773466D A US 3773466DA US 3773466 A US3773466 A US 3773466A
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Prior art keywords
autoclave
steam
sterilization
heating means
conduit
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Expired - Lifetime
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US00161760A
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English (en)
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F Linder
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/03—Press-moulding apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/04—Pressure vessels, e.g. autoclaves

Definitions

  • ABSTRACT A steam operated autoclave is disclosed having a circulating steam phase, a steam producing water container, a double cleading surrounding the interior of the autoclave and valves in the conduits between the different parts of the autoclave and its accessories for selective operation of first and second heat elements arranged in said double cleading and the water container for obtaining an improved efficiency of such autoclaves by automatic preheating of the double cleading before each sterilization.
  • This invention relates to an arrangement for a steamheated autoclave ,for improving the efficiency of such autoclaves during sterilization. More particularly, this invention relates to steam-heated autoclaves having at least a partially circulating steam phase, the steam being generated in a water container located exteriorly of the autoclave and being connected to a water storage means.
  • An important object of this invention is to provide a new and improved sterilization apparatus with improved efficiency.
  • Another object of this invention is to provide a new and improved sterilization apparatus in which the walls of the interior of the autoclave are automatically preheated immediately before or after each sterilization.
  • This invention creates an arrangement which'accomplishes all the aforementioned objects by an ingenious co-ordination of all the required measures.
  • a steam operated sterilization system having a circulating steam phase comprising an autoclave having an interior heating space therein; a water container located exteriorly of the autoclave for producing steam and connected to communicate with the interior of the autoclave; a water storage means connected to the water container; a first heating means for heating cleading at least partly surrounding the autoclave; a second heating means for producing steam in the water container; means for selective operation of said first and second heating means before, during or after a sterilization cycle, whereby the first heating means is operated immediately before and after sterilization of articles in the autoclave and the second heating means is operated only during sterilization.
  • This arrangement enables the autoclave chamber to be quickly heated and the heat to be retained in the cleading around the autoclave during the actual sterilization cycle. This preheating following each sterilization can also be used to dry sterilized objects before they are taken out of the autoclave.
  • the double cleading is provided with heating elements regulated by a thermostat.
  • the steam is generated in a water container located exteriorly of the autoclave.
  • the water container is connected to a water tank and the air forced out of the autoclave is gradually removed from the flow of steam by means of a known steam trap.
  • the present construction comprises a combination of a first heating means for heating the double cleading surrounding the autoclave chamber and a second heating means for producing steam in the water container and switching means to alternately operate said first or said second heating means before and after the sterilization cycle, so that the first heating means is operating immediately before and after the sterilization cycle whereas the second heating means is operating only during the actual sterilization cycle.
  • This alternative switching between the heating means may suitably be effected by means of a timer.
  • an autoclave is designated by the reference numeral 1, the autoclave being surrounded by a double cleading 2 in the form of a metal block which can be heated by a heating means 3.
  • the heating means 3 cooperates with a thermostat 4 which is preferably set at a temperature corresponding to the sterilization temperature.
  • the steam is generated in a water container 11 arranged outside the autoclave l and having a heating means 15 regulated by a thermostat 14.
  • the water container 11 is connected by way of a steam conduit 13 to a steam inlet 7 opening into the upper part of the autoclave chamber.
  • a branch conduit 12 which opens into the water container 1 1 and is intended to return excess water to the water container 11.
  • An outlet conduit 5 leads from the bottom of the autoclave chamber and this is connected by way of a three-way valve 17 and pertaining return conduit 10, to the water container 11.
  • the return conduit 10 opens into the upper part of the water container 11.
  • a first outlet 17A is connected to the outlet conduit 5, a second outlet 17B to the return conduit 10 and a third outlet 17C to a reverse valve 9.
  • the reverse valve 9 contains a sphere 9C and is connected to the bottom of a water tank 16 by means of an outlet 9A located substantially opposite the connection to the outlet 17C of the three-way valve 17.
  • a conduit 8 having external cooling fins 19 also opens into the reverse valve 9 and the opposite end of the conduit opens out above the water level in the water tank 16.
  • a branch conduit 20 leads from the outlet conduit 5 between the autoclave and the outlet 17A of the three-way valve 17, to a steam trap 18 which is provided with a drainage conduit 6 which opens out above the water level in the container 16.
  • the described system operates in the following way:
  • the heating means 3 is switched in by way of the thermostat 4 which is set at a temperature corresponding to the sterilization temperature so that the double cleading 2 is heated to this temperature. As soon as this temperature has been reached, the autoclave is ready for use.
  • outlets 17A, 17B of the three-way valve are open, any water which has collected at the bottom of the autoclave can flow back to the container 11 through the outlet conduit 5, outlets 17A, 17B and the return conduit 10.
  • the thermostat cuts off the current supply to the element 14, which is however switched on again when the temperature falls below the value set. This occurs repeatedly during the predetermined sterilization time.
  • the current supply to the means 15 and the three-way valve 17 may be cut off by means of a timer, for example, which at the same time switches on the heating means 3 in the double cleading 2 via the thermostat 4 so that the autoclave is immediately preheated for the next sterilization cycle. Due to the function of the three-way valve 17, the outlets 17B, 17C are now open whereas the outlet 17A is closed. Steam thus flows from the autoclave 1 through the conduits 7, 13, the container 11 and the conduits l0, 8, back to the water tank 16 since, because of the overpressure now prevailing in the reverse valve 9, its outlet 9A is kept closed.
  • the sphere 9C falls due to its own weight and thus frees the outlet 9A. Water then flows from the tank 16 through the outlet 9A, reverse valve 9, outlet 17B of the three-way valve 17 and the conduit 10 to the container 11 and replaces the water consumed during the sterilization process.
  • the autoclave is preheated for the next sterilization cycle and the heat thus achieved is simultaneously used to dry the objects in the autoclave sterilized by the sterilization cycle just completed.
  • the heating block may be made partly of aluminium or some other suitable material and the alternate switching between the heating means 3 and 15 may of course also be performed by hand or by means of other automatic devices than the timer proposed above. Of course, a plurality of heating elements may also be used.
  • a steam operated sterilization system having a circulating steam phase comprising an autoclave having an interior heating space therein; a water container located exteriorly of the autoclave for producing steam and connected to communicate with the interior of the autoclave; a water storage means connected to the water container; cleading at least partially surrounding said autoclave and a first heating means for heating said cleading; a second heating means for producing steam in the water container; means for selective operation of said first and second heating means before, during or after a sterilization cycle, whereby the first heating means is operated immediately before and after sterilization of articles in the autoclave and the second heating means is operated only during sterilization; the connection between the water container and the interior of the autoclave comprising a steam conduit extending between the container and a steam inlet opening in the upper part of the autoclave, and a branch conduit for return of excess water being arranged between said steam conduit and said water tank.
  • a steam operated sterilization system having a circulating steam phase comprising an autoclave having an interior heating space therein; a water container located exteriorly of the autoclave for producing steam and connected to communicate with the interior of the autoclave; a water storage means connected to the water container; cleading at least partially surrounding said autoclave and a first heating means for heting said cleading; a second heating means for producing steam in the water container; means for selective operation of said first and second heating means before, during or after a sterilization cycle, whereby the first heating means is operated immediately before and after sterilization of articles in the authoclave and the second heating means is operated only during sterilization; a three-way valve being interposed in an outlet conduit between the autoclave and the water container for expelling air and steam from the autoclave, a branch conduit leading to a steam trap being connected to said outlet conduit at a location between the autoclave and the three-way valve.
  • a steam operated sterilization system in which a first outlet of the three-way valve is connected to the outlet of the outlet conduit; a second outlet of the three-way valve is connected to a return conduitjoined to the water container and the third outlet of the three-way valve is connected to a reverse valve joined to the water storage means for automatic compensation of water losses after each sterilization.
  • a steam operated sterilization system in which the reverse valve comprises a spherical blocking member and in which a conduit having external cooling fins is connected to the reverse valve and extending above the water level of the water storage

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)
  • Forging (AREA)
US00161760A 1970-09-10 1971-08-24 Arrangement for a steam-heated autoclave Expired - Lifetime US3773466A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT7004270 1970-09-10

Publications (1)

Publication Number Publication Date
US3773466A true US3773466A (en) 1973-11-20

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ID=11313347

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US00161760A Expired - Lifetime US3773466A (en) 1970-09-10 1971-08-24 Arrangement for a steam-heated autoclave
US00174325A Expired - Lifetime US3773446A (en) 1970-09-10 1971-08-24 Device for moulding parts to be sintered

Family Applications After (1)

Application Number Title Priority Date Filing Date
US00174325A Expired - Lifetime US3773446A (en) 1970-09-10 1971-08-24 Device for moulding parts to be sintered

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US (2) US3773466A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5441748B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) AT323528B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE771591A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA944916A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH537227A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CS (1) CS167946B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2142570C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DK (1) DK129398B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES394657A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2107482A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1356186A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NO (1) NO131915C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE363987B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SU (1) SU469235A3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ZA (1) ZA715429B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057391A (en) * 1973-05-22 1977-11-08 Toyo Seikan Kaisha Ltd. Steam sterilization of materials in sealed packages
DE2921230A1 (de) * 1979-05-25 1980-11-27 Herz Helmut Dampfsterilisationseinrichtung
US4685507A (en) * 1982-07-07 1987-08-11 Schaefer Otmar U Process for the staged heating of a material in a treatment apparatus and subsequent cooling thereof
US4808377A (en) * 1985-07-26 1989-02-28 American Sterilizer Company Self-contained, closed loop steam sterilizer
US4909999A (en) * 1987-07-06 1990-03-20 American Sterilizer Company Flow-through vapor phase sterilization system
US5271893A (en) * 1989-11-24 1993-12-21 Duncan Newman Apparatus for steam sterilization of articles
US5480623A (en) * 1993-11-05 1996-01-02 Mdt Corporation Non-recirculating collection system for sterilizer effluent
US5492672A (en) * 1992-03-13 1996-02-20 American Sterilizer Company Sterilization apparatus and method for multicomponent sterilant
US5840248A (en) * 1995-04-28 1998-11-24 M.O.Com. S.R.L. Moist-heat sterilization apparatus and process, in particular to set up autoclaves for dental surgery use
US20090139550A1 (en) * 2007-08-03 2009-06-04 Lg Electronics Inc. Steam generator

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US4008021A (en) * 1971-08-10 1977-02-15 Schwelmer Eisenwerk Muller & Co. Gmbh Apparatus for forming a sinterable compact of a powder
IT976216B (it) * 1972-12-29 1974-08-20 Olivetti & Co Spa Dispositivo di formatura di pezzi elicoidali mediante compattazione di materiali in polvere
US4147492A (en) * 1977-02-27 1979-04-03 Bellaplast Gmbh Machine press, specifically a stamping press
US4158539A (en) * 1978-05-10 1979-06-19 Leesona Corporation Thermoforming machine with variable mold closed cycle
US4372903A (en) * 1980-09-02 1983-02-08 Cts Corporation Process for controlling the movement of press components
JPS57141004A (en) * 1981-02-23 1982-09-01 Hitachi Ltd Recording system for multichannel sound signal
IT1221597B (it) * 1987-07-24 1990-07-12 Ugo Giannelli Apprecchiatura di stampaggio e sformatura di manufatti in cemento prodotti dalle presse
DE3768815D1 (de) * 1987-11-19 1991-04-25 Graebener Theodor Pressensyst Presse, insbesondere zum herstellen masshaltiger presslinge aus pulverfoermigen werkstoffen.
JP3585495B2 (ja) * 1993-11-24 2004-11-04 スタックポール リミテッド 位相がずらされた割り形ダイ
DE69328262T2 (de) * 1993-11-24 2000-12-21 Stackpole Ltd., Mississauga Hinterschnittene mehrteilige pressform
AT402375B (de) * 1994-10-14 1997-04-25 Kranzinger Norbert Verfahren und vorrichtung zum herstellen von hohlbausteinen
US6165400A (en) * 1996-05-09 2000-12-26 Stackpole Limited Compacted-powder opposed twin-helical gears and method
US6440357B1 (en) 1996-05-09 2002-08-27 Stackpole Limited Compacted-powder opposed twin-helical gears and method
US5885625A (en) * 1996-06-14 1999-03-23 Materials Innovation, Inc. Pressurized feed shoe apparatus for precompacting powdered materials
US5897826A (en) * 1996-06-14 1999-04-27 Materials Innovation, Inc. Pulsed pressurized powder feed system and method for uniform particulate material delivery
US5885496A (en) * 1996-08-29 1999-03-23 Materials Innovation, Inc. Pressurized feedshoe apparatus and method for precompacting powdered materials
CN1139481C (zh) * 1996-11-14 2004-02-25 松下电器产业株式会社 粉末压缩成形方法及其成形机和干电池
US6558594B2 (en) 1996-11-14 2003-05-06 Matsushita Electric Industrial Co., Ltd. Powder compression molding method for producing cathode pellets for dry cells
SE9903812D0 (sv) * 1999-10-22 1999-10-22 Skf Nova Ab A forming tool
GB2360825B (en) * 2000-03-30 2004-11-17 Formflo Ltd Gear wheels roll formed from powder metal blanks
US7235201B2 (en) * 2004-12-20 2007-06-26 Borgwarner Inc. Split die and method for production of compacted powder metal parts
CN100591506C (zh) * 2005-11-04 2010-02-24 鸿富锦精密工业（深圳）有限公司 模仁安装高度可调节的模具
CN100473521C (zh) * 2006-03-31 2009-04-01 Tdk株式会社 成形装置
JP4506734B2 (ja) * 2006-03-31 2010-07-21 Ｔｄｋ株式会社 成形装置
CN102514219B (zh) * 2011-12-21 2015-05-13 严俏敏 粉末成形机的传动杆
US11376769B2 (en) * 2019-05-03 2022-07-05 Virginia Tech Intellectual Properties, Inc. Expandable foaming molds and applications thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526974A (en) * 1946-09-11 1950-10-24 Emil R Schipanski Autoclave
US3107975A (en) * 1960-08-31 1963-10-22 Linder Fritz Arrangement for a steam-heated autoclave
US3298776A (en) * 1964-08-20 1967-01-17 American Sterilizer Co Portable autoclave
US3338663A (en) * 1965-03-24 1967-08-29 American Sterilizer Co Dual autoclave
US3443884A (en) * 1964-09-29 1969-05-13 Fritz Linder Heated sterilizing apparatus utilizing a pressure-tight vessel
US3481692A (en) * 1966-03-04 1969-12-02 Fritz Linder Arrangement for a steam-heated autoclave

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US1607389A (en) * 1923-10-26 1926-11-16 Bound Brook Oil Less Bearing Pressed-metal article and method of and machine for making same
US2389169A (en) * 1942-05-20 1945-11-20 French Oil Mill Machinery Hydraulic motor
US2570989A (en) * 1944-02-15 1951-10-09 Gen Bronze Corp Apparatus for forming powder metallurgy parts
US2653377A (en) * 1947-09-02 1953-09-29 American Electro Metal Corp Method for forming metal powder into a fluid guiding body
US2592296A (en) * 1950-04-01 1952-04-08 Louis F Kutik Method of and apparatus for making brushes
US2823419A (en) * 1952-03-14 1958-02-18 Fansteel Metallurgical Corp Machine for pressing tantalum capacitor elements
US2791804A (en) * 1953-01-07 1957-05-14 Talmage Charles Robert Method and apparatus for forming powder metal parts having undercuts or the like
US2883704A (en) * 1953-05-28 1959-04-28 Us Rubber Co Transfer molding apparatus
US2916768A (en) * 1955-03-19 1959-12-15 Ind V H V Lohuizen & Co Nv Locking device for injection molding machines
NL253507A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1960-07-28
AT274337B (de) * 1963-04-30 1969-09-10 Mannesmann Meer Ag Vorrichtung zum Verriegeln der Formschließeinheit an einer Spritzgußmaschine
NL147670B (nl) * 1965-11-30 1975-11-17 Philips Nv Vormpers.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526974A (en) * 1946-09-11 1950-10-24 Emil R Schipanski Autoclave
US3107975A (en) * 1960-08-31 1963-10-22 Linder Fritz Arrangement for a steam-heated autoclave
US3298776A (en) * 1964-08-20 1967-01-17 American Sterilizer Co Portable autoclave
US3443884A (en) * 1964-09-29 1969-05-13 Fritz Linder Heated sterilizing apparatus utilizing a pressure-tight vessel
US3338663A (en) * 1965-03-24 1967-08-29 American Sterilizer Co Dual autoclave
US3481692A (en) * 1966-03-04 1969-12-02 Fritz Linder Arrangement for a steam-heated autoclave

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057391A (en) * 1973-05-22 1977-11-08 Toyo Seikan Kaisha Ltd. Steam sterilization of materials in sealed packages
DE2921230A1 (de) * 1979-05-25 1980-11-27 Herz Helmut Dampfsterilisationseinrichtung
US4685507A (en) * 1982-07-07 1987-08-11 Schaefer Otmar U Process for the staged heating of a material in a treatment apparatus and subsequent cooling thereof
US4808377A (en) * 1985-07-26 1989-02-28 American Sterilizer Company Self-contained, closed loop steam sterilizer
US4909999A (en) * 1987-07-06 1990-03-20 American Sterilizer Company Flow-through vapor phase sterilization system
US5271893A (en) * 1989-11-24 1993-12-21 Duncan Newman Apparatus for steam sterilization of articles
US5492672A (en) * 1992-03-13 1996-02-20 American Sterilizer Company Sterilization apparatus and method for multicomponent sterilant
US5556607A (en) * 1992-03-13 1996-09-17 American Sterilizer Company Sterilization apparatus and method for multicomponent sterilant
US5480623A (en) * 1993-11-05 1996-01-02 Mdt Corporation Non-recirculating collection system for sterilizer effluent
US5840248A (en) * 1995-04-28 1998-11-24 M.O.Com. S.R.L. Moist-heat sterilization apparatus and process, in particular to set up autoclaves for dental surgery use
US20090139550A1 (en) * 2007-08-03 2009-06-04 Lg Electronics Inc. Steam generator

Also Published As

Publication number Publication date
ZA715429B (en) 1972-04-26
DK129398B (da) 1974-10-07
GB1356186A (en) 1974-06-12
NO131915B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-05-20
ES394657A1 (es) 1974-03-01
JPS5441748B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1979-12-10
US3773446A (en) 1973-11-20
SE363987B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-02-11
DE2142570B2 (de) 1979-04-19
FR2107482A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-05-05
SU469235A3 (ru) 1975-04-30
AT323528B (de) 1975-07-10
BE771591A (fr) 1971-12-31
NO131915C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-08-27
DE2142570C3 (de) 1979-12-13
DE2142570A1 (de) 1972-03-16
CA944916A (en) 1974-04-09
CH537227A (it) 1973-05-31
CS167946B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1976-05-28
DK129398C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-02-24

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