US2709954A - Work tables - Google Patents

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US2709954A
US2709954A US300790A US30079052A US2709954A US 2709954 A US2709954 A US 2709954A US 300790 A US300790 A US 300790A US 30079052 A US30079052 A US 30079052A US 2709954 A US2709954 A US 2709954A
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work
compartment
air
dust
access opening
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US300790A
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Arthur K Baker
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/20—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for shielding the work area
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/192—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by electrical means, e.g. by applying electrostatic fields or high voltages
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D1/00—Gripping, holding, or supporting devices
    • G04D1/0007—Gripping, holding, or supporting devices for assembly entirely by hand
    • G04D1/0014—Workbenches, supports; Workbenches provided with suction devices; for dust; Illumination
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/18—Work bench
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/29—Air curtains

Definitions

  • This invention relates to work tables and more particularly to a contamination free work table especially adapted for the handling of delicate or sterile materials.
  • Fig. 1 is an isometric View of the contamination free work table of my invention
  • Fig. 2 is a vertical cross sectional view taken on the line 2 2 of Fig. l;
  • Fig. 3 is a vertical cross sectional view taken on the line 3-3 of Fig. 1.
  • the work table of my invention includes one or more rates Patent work compartments 10 and 11, and a ventilation compartment 12 therebetween, such compartments being separate units as hereinafter more fully explained.
  • the work compartments are supported at one end on suitable legs 14 and at the other end by ventilation compartment 12.
  • the work compartments have a generally vertical rear wall 16 and a front wall having a sloping upper portion l and a generally vertical lower portion 20 as well as suitable ends 17', one of which may be formed by the side of the ventilation compartment 12.
  • the front wall upper portion 18 has a transparent panel 19 therein and ends 17 are provided with lights 52 arranged to provide additional illumination to bottom surface 24.
  • the lower portion 2@ of said front wall has an access opening 22 extending substantially along the entire length of the Work compartment which is thus completely enclosed except for said access opening.
  • Beneath the bottom 24 of the work compartment is provided a sliding door structure having a door portion 21 hinged by a suitable hinge 23 to a sliding door support member 25.
  • access opening 22 may be closed by sliding said door structure forward and covering said access opening with door portion 21, a suitable friction catch 2'7 being provided to releasably maintain said door 21 in closed position.
  • I supply a liow of air outwardly entirely throughout access opening 22, such air having been suitably decontaminated in accordance with the particular service to which the work table is to be put.
  • decontamination includes air treatment means for filtering the air, precipitating line dust therefrom, and additional means, it' necessary, for sterilizing it as hereinafter explained.
  • I provide a duct 26 disposed preferably along the upper surface of the work compartment 1t), said duct having, in its lower surface, openings 28 communicating with the interior of said compartment.
  • a baffle 30 comprising a shelf mounted in generally horizontal position on the rear wall i6 of said work compartment is arranged to cooperate with the sloping front wall portion 18 to direct air smoothly outwardly throughout the entire extent of access opening 22.
  • the air treatment means for filtering air and supplying such filtered air to the work compartments is provided in ventilation compartment 12, such compartment having a plurality of openings 32 around the bottom portion thereof.
  • a blower 34 is mounted therein to force air from said openings 32 through port 33 to plenum chamber 38 communicating with Ventilator' compartment duct 29 extending along the top of said compartment, said air passing through filter elements between said opening 32 and said blower.
  • Said filter elements comprise a mechanical filter element 35 consisting of a layer of fiber glass which is eective to remove relatively large dust particles from the air passing through it, and an electrical dust precipitator for removing small dust particles.
  • the electrical dust precipitator includes a series of oppositely charged plates adapted to remove tine dust particles electrostatically.
  • Such precipitator operates by a high Voltage on ionizer wires 41 mounted on supports 40 to charge the dust particles and a second high voltage to a iirst group dust collector plates 42, the second group of dust collector plates 44 being grounded as is one side of the high voltage power unit 46 which supplies said voltages.
  • a diffusing element comprising a flat plate 36 with perforations 37 therein arranged to insure that air goes evenly through the dust precipitator is preferably provided between fiber glass filter 35 and the precipitator.
  • the filtered and dust-free air thus passes from iiltering compartment 12 to the plenum chamber 3S, and then into duct 29 overlying said compartment. From the ventilation compartment duct 29 it passes into work compartment ducts 26 adjoining said duct 29 and finally through openings 28 into the work compartments 10 and 11, at a pressure greater than atmospheric pressure, so as to flow outwardly through access openings 22 therein.
  • suitable irradiation means such as ultra-violet lights 48 may be provided, for example, in duct 26, such means being effective to kill air borne bacteria before it reaches work compartments 10 and 11 to provide a sterile as well as a dust free work table.
  • the various decontaminating means and the illuminating means 52 may be connected with a switch 49, such switch preferably being mounted above access opening 22 in position to be actuated by door 2l so that said means will be started as soon as said door is opened to prevent contamination of the work compartment.
  • Fig. l two work compartments are provided with a single Ventilating compartment.
  • the work compartment duct 26 is terminated at the end of said Work compartment adjacent Ventilating compartment duct 29, a plate 50, gasketing material and suitable sheet metal screws S1 being provided for attaching said work compartment duct 26 to Ventilating compartment duct 29.
  • a similar arrangement is provided to connect the opposite work compartment 11 to said Ventilating compartment.
  • one or more work compartments may be arranged on either side of the Ventilating compartment.
  • a single ventilating compartment can supply four work spaces on the left or four on the right or one and three or two and two.
  • a suitable plate, not shown, may be placed in the unused end of Ventilating compartment duct 29.
  • an operator seated in front of said work table reaches through access opening 22 in order to handle the materials therein by suitable tools. While the necessary handling is being performed theoperators hands and arms together with the materials to be handled will continually be bathed in decontaminated air, which air is then moved outwardly through access opening 22 forming an air shield to prevent contamination by matter either picked up from the operator or from the normal atmospheric air outside of the work compartment.
  • a dust free work table comprising an enclosed work compartment having a bottom providing a work surface and an access opening in said compartment adjacent said work surface for access thereto, means for removing dust from atmospheric air, duct means communicating with said dust removing means and said table for receiving dust free air from said dust removing means and supplying the dust free air to said table, and means for flowing air through said dust removing means and providing a ow of dust free air through said duct means and into said enclosed work compartment at a pressure greater than atmospheric pressure, and means for directing the dust free air outwardly entirely throughout said access opening to form an air shield entirely across said access opening to prevent movement of atmospheric air inwardly through said access opening to said work surface.
  • a dust free work table as claimed in claim l further including door means operable to close said access opening and switch means actuated by said door means arranged and connected to operate said dust removing means when said door means is in open position.
  • a dust free work table as claimed in claim l further characterized in that said work compartment has a front wall with a sloping upper portion and wherein said access opening is positioned between the lower portion of said sloping front wall and said bottom.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)

Description

\ June 7, 1955 A. K. BAKER 2,709,954
WORK TABLES Filed July 24, 1952 IN V EN TOR.
WORK TABLES Arthur K. Baker, Parsonsiield, Maine Application July 24, 1952, Serial No. 300,790
Claims. (Cl. 98-36) This invention relates to work tables and more particularly to a contamination free work table especially adapted for the handling of delicate or sterile materials.
Many types of materials cannot be handled by conventional methods without contaminating or damaging them, and, as a result, elaborate techniques have been devised in order to minimize such damage. For example, special tools are commonly used in order to avoid the necessity of touching the material to be handled and such tools themselves are cleaned and otherwise maintained in a manner to prevent their contaminating the material,
Another and more serious source of contamination arises from atmospheric air. However, since materials frequently must be exposed to the atmosphere in order to pack them or assemble them with other elements it has been thought that a certain amount of contamination by atmospheric air was to some extent unavoidable, since the complicated apparatus necessary to handle materials within conventional enclosed sterilized compartments made their use impractical in most instances. For example, in the use of so-'called micro ball bearings, in which the completed bearing is frequently of the order of but 1A; of an inch, it is essential to keep small particles of dust out of the bearing elements to avoid damaging them. Since it is necessary, as a practical matter, to expose the bearing to the air in order to assemble it with other machine elements there is danger that dust particles may be carried into the bearing and so damage it that it must be replaced. Although this situation has been accepted for a number of years, the necessity of convenient handling of the bearings outweighed the loss from damaged bearings and such loss was considered a necessary evil.
Similarly, in the packing of pharmaceuticals in ampules it has been found essential to carry out the operation in enclosed compartments by automatic machinery if the essential sterility is to be maintained. However, such an operation adds greatly to the expense of packing such ampules particularly when relatively small quantities are to be handled.
Accordingly, it is an object of the present invention to provide a contamination free work table in which the materials are readily handled while maintaining them under contamination free conditions.
It is a particular feature of my invention that the work table so provided is simple and effective and requires no complicated mechanism for handling the materials.
For the purpose of more fully explaining a preferred embodiment of my invention, reference is made to the following drawings in which:
Fig. 1 is an isometric View of the contamination free work table of my invention;
Fig. 2 is a vertical cross sectional view taken on the line 2 2 of Fig. l;
Fig. 3 is a vertical cross sectional view taken on the line 3-3 of Fig. 1.
The work table of my invention includes one or more rates Patent work compartments 10 and 11, and a ventilation compartment 12 therebetween, such compartments being separate units as hereinafter more fully explained. The work compartments are supported at one end on suitable legs 14 and at the other end by ventilation compartment 12. The work compartments have a generally vertical rear wall 16 and a front wall having a sloping upper portion l and a generally vertical lower portion 20 as well as suitable ends 17', one of which may be formed by the side of the ventilation compartment 12. Preferably, the front wall upper portion 18 has a transparent panel 19 therein and ends 17 are provided with lights 52 arranged to provide additional illumination to bottom surface 24.
The lower portion 2@ of said front wall has an access opening 22 extending substantially along the entire length of the Work compartment which is thus completely enclosed except for said access opening. Beneath the bottom 24 of the work compartment is provided a sliding door structure having a door portion 21 hinged by a suitable hinge 23 to a sliding door support member 25. Thus, when the work table is not in use, access opening 22 may be closed by sliding said door structure forward and covering said access opening with door portion 21, a suitable friction catch 2'7 being provided to releasably maintain said door 21 in closed position.
ln order to maintain the Work compartment and its work surface 24 in uncontaminated condition, I supply a liow of air outwardly entirely throughout access opening 22, such air having been suitably decontaminated in accordance with the particular service to which the work table is to be put. Such decontamination includes air treatment means for filtering the air, precipitating line dust therefrom, and additional means, it' necessary, for sterilizing it as hereinafter explained.
In order to provide a suitable uniform continuous ow of air outwardly entirely throughout access opening 22, I provide a duct 26 disposed preferably along the upper surface of the work compartment 1t), said duct having, in its lower surface, openings 28 communicating with the interior of said compartment. A baffle 30 comprising a shelf mounted in generally horizontal position on the rear wall i6 of said work compartment is arranged to cooperate with the sloping front wall portion 18 to direct air smoothly outwardly throughout the entire extent of access opening 22.
The air treatment means for filtering air and supplying such filtered air to the work compartments is provided in ventilation compartment 12, such compartment having a plurality of openings 32 around the bottom portion thereof. A blower 34 is mounted therein to force air from said openings 32 through port 33 to plenum chamber 38 communicating with Ventilator' compartment duct 29 extending along the top of said compartment, said air passing through filter elements between said opening 32 and said blower. Said filter elements comprise a mechanical filter element 35 consisting of a layer of fiber glass which is eective to remove relatively large dust particles from the air passing through it, and an electrical dust precipitator for removing small dust particles.
The electrical dust precipitator includes a series of oppositely charged plates adapted to remove tine dust particles electrostatically. Such precipitator operates by a high Voltage on ionizer wires 41 mounted on supports 40 to charge the dust particles and a second high voltage to a iirst group dust collector plates 42, the second group of dust collector plates 44 being grounded as is one side of the high voltage power unit 46 which supplies said voltages. A diffusing element comprising a flat plate 36 with perforations 37 therein arranged to insure that air goes evenly through the dust precipitator is preferably provided between fiber glass filter 35 and the precipitator.
3 Such electrical dust precipitators are well known and need not herein be further described.
The filtered and dust-free air thus passes from iiltering compartment 12 to the plenum chamber 3S, and then into duct 29 overlying said compartment. From the ventilation compartment duct 29 it passes into work compartment ducts 26 adjoining said duct 29 and finally through openings 28 into the work compartments 10 and 11, at a pressure greater than atmospheric pressure, so as to flow outwardly through access openings 22 therein.
In order to provide sterilized as well as dust free air to said work compartments, suitable irradiation means such as ultra-violet lights 48 may be provided, for example, in duct 26, such means being effective to kill air borne bacteria before it reaches work compartments 10 and 11 to provide a sterile as well as a dust free work table. The various decontaminating means and the illuminating means 52 may be connected with a switch 49, such switch preferably being mounted above access opening 22 in position to be actuated by door 2l so that said means will be started as soon as said door is opened to prevent contamination of the work compartment.
In order to provide ilexible unit construction, I prefer to construct the work compartments separate from the Ventilating compartment. For example, in Fig. l, two work compartments are provided with a single Ventilating compartment. The work compartment duct 26 is terminated at the end of said Work compartment adjacent Ventilating compartment duct 29, a plate 50, gasketing material and suitable sheet metal screws S1 being provided for attaching said work compartment duct 26 to Ventilating compartment duct 29. A similar arrangement is provided to connect the opposite work compartment 11 to said Ventilating compartment. Thus either one or more workl compartments may be used with a single Ventilating compartment and the attaching plates 50 may be quickly and easily removed to release one from the other. If desired for convenience in installation, one or more work compartments may be arranged on either side of the Ventilating compartment. For example, a single ventilating compartment can supply four work spaces on the left or four on the right or one and three or two and two. A suitable plate, not shown, may be placed in the unused end of Ventilating compartment duct 29.
To use my novel work table, an operator seated in front of said work table reaches through access opening 22 in order to handle the materials therein by suitable tools. While the necessary handling is being performed theoperators hands and arms together with the materials to be handled will continually be bathed in decontaminated air, which air is then moved outwardly through access opening 22 forming an air shield to prevent contamination by matter either picked up from the operator or from the normal atmospheric air outside of the work compartment.
Thus it will be seen that I have provided a novel contamination free work table which at the same time permits convenient and direct handling of materials therein. Various changes within the spirit of my invention and the scope of the appended claims will be apparent to those skilled in the art.
I claim:
l. A dust free work table comprising an enclosed work compartment having a bottom providing a work surface and an access opening in said compartment adjacent said work surface for access thereto, means for removing dust from atmospheric air, duct means communicating with said dust removing means and said table for receiving dust free air from said dust removing means and supplying the dust free air to said table, and means for flowing air through said dust removing means and providing a ow of dust free air through said duct means and into said enclosed work compartment at a pressure greater than atmospheric pressure, and means for directing the dust free air outwardly entirely throughout said access opening to form an air shield entirely across said access opening to prevent movement of atmospheric air inwardly through said access opening to said work surface.
2. A dust free work table as claimed in claim l, further including door means operable to close said access opening and switch means actuated by said door means arranged and connected to operate said dust removing means when said door means is in open position.
3. A dust free work table as claimed in claim l in which said air treatment means includes irradiation means constructed and arranged to sterilize air in said compartment.
4. A dust free work table as claimed in claim l in which Said dust removing means includes an electrical dust precipitating means.
5. A dust free work table as claimed in claim l, further characterized in that said work compartment has a front wall with a sloping upper portion and wherein said access opening is positioned between the lower portion of said sloping front wall and said bottom.
References Cited inthe rile of this patent UNlTED STATES PATENTS 2,209,054 Doud et al. July 23, 1940 2,234,037 Anderson Mar. 4, l94l 2,334,776 King et al. Nov. 23, 1943 2,350,735 Egge June 6, 1944 2,380,147 Burke July l0, 1945 2,397,197 Newman Mar. 26, 1946 2,397,731 Fowler Apr. 2, i946 2,436,508 Fairbanks Feb. 24, 1948 FOREIGN PATENTS 206,257 Switzerland Nov. l, i939
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Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2999448A (en) * 1958-03-06 1961-09-12 Varian Associates Dust free work bench apparatus
DE1124890B (en) * 1957-03-01 1962-03-01 Licentia Gmbh Device to protect the workplace
US3028715A (en) * 1959-01-26 1962-04-10 Honeywell Regulator Co Fluid cleaning apparatus
US3095836A (en) * 1961-03-08 1963-07-02 Lab Furniture Company Inc Constructions for tables and like structures
US3148956A (en) * 1961-04-18 1964-09-15 Plastigage Corp Dust-free cabinet
US3229611A (en) * 1964-01-13 1966-01-18 Jr Fred W Berger Portable work bench and air controller system
US3251177A (en) * 1963-05-15 1966-05-17 Arthur K Baker Dust-free bench
US3273323A (en) * 1963-12-24 1966-09-20 Willis J Whitfield Laminar flow air hood apparatus
US3284148A (en) * 1965-02-24 1966-11-08 Ramniceanu Tiberiu Justinian Blower-contained vibration-free work bench
US3301167A (en) * 1964-05-04 1967-01-31 Ray Products Company Inc Anticontaminant work bench
US3336855A (en) * 1965-12-30 1967-08-22 Atmos Tech Corp Ultraclean work station
US3422600A (en) * 1965-10-22 1969-01-21 Charles A Chamberlain Air-conditioned meat cutting table
US3425335A (en) * 1968-01-24 1969-02-04 Purex Corp Ltd Laboratory fume hood
US3747301A (en) * 1971-11-17 1973-07-24 Venus Electronics Corp Smoke eliminator
US3988131A (en) * 1975-07-09 1976-10-26 Alpha Denshi Kabushiki Kaisha Electronic air cleaner
US4134744A (en) * 1973-11-08 1979-01-16 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Fine particulate capture device
US4371386A (en) * 1981-05-18 1983-02-01 Veco International, Inc. Filter housing
US4427427A (en) 1982-01-19 1984-01-24 Veco S.A. Vertical laminar flow filter module
US4706572A (en) * 1985-02-20 1987-11-17 Priesemuth W Arrangement of work locations
FR2605151A1 (en) * 1986-10-08 1988-04-15 Onera (Off Nat Aerospatiale) LAMINARY FLOW HOOD WITH STATIC ELECTRICITY ELIMINATOR
USD295567S (en) 1985-04-01 1988-05-03 Shuttleworth, Inc. Combined air filteration housing and conveyor unit
US5417433A (en) * 1994-07-25 1995-05-23 Phillips; Donald A. Ventilated gaming table assembly
US5553826A (en) * 1995-05-10 1996-09-10 Coors Brewing Company Necking apparatus support
US5616172A (en) * 1996-02-27 1997-04-01 Nature's Quarters, Inc. Air treatment system
US5632806A (en) * 1995-02-17 1997-05-27 Faber S.P.A. Integrated suction hood featuring air depollution
US5879435A (en) * 1997-01-06 1999-03-09 Carrier Corporation Electronic air cleaner with germicidal lamp
US5938823A (en) * 1997-04-18 1999-08-17 Carrier Corporation Integrated electrostatic collection and microwave sterilization for bioaerosol air purification
US5997619A (en) * 1997-09-04 1999-12-07 Nq Environmental, Inc. Air purification system
US6149717A (en) * 1997-01-06 2000-11-21 Carrier Corporation Electronic air cleaner with germicidal lamp
US6257544B1 (en) * 1995-05-10 2001-07-10 Coors Brewing Company Necking apparatus support
US6428611B1 (en) * 2000-11-27 2002-08-06 Air Quality Engineering Inc Apparatus for removing mist, smoke and particles generated by machine tools
US6623538B2 (en) * 2001-03-05 2003-09-23 Council Of Scientific & Industrial Research Sterile laminar airflow device
US20030217675A1 (en) * 2002-05-21 2003-11-27 Meng-Chieh Cheng Work table with a sawdust collecting mechanism
US20030217674A1 (en) * 2002-05-21 2003-11-27 Meng-Chieh Cheng Work table with a sawdust collecting mechanism
US20040134354A1 (en) * 2003-01-10 2004-07-15 Johnson Dayne Christopher Air filtration device for reducing airborne particulate matter in enclosures
US20060005703A1 (en) * 2004-06-30 2006-01-12 Chi-Hsiang Wang Ultraviolet air purifier having multiple charged collection plates
WO2012062478A1 (en) * 2010-11-13 2012-05-18 Waldner Laboreinrichtungen Gmbh & Co. Kg Extractor apparatus with gas cleaning
US20150196925A1 (en) * 2014-01-14 2015-07-16 Lg Electronics Inc. Air conditioning apparatus
USD805415S1 (en) * 2016-02-04 2017-12-19 Panasonic Healthcare Co., Ltd. Draft chamber
EP4023394A1 (en) * 2021-01-04 2022-07-06 The Boeing Company Housing assembly for selectively receiving a part and a method of removing particles from a frictional surface of a pad
US11629872B2 (en) 2021-04-12 2023-04-18 NQ Industries, Inc. Single pass kill air purifier system and process of operation

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CH206257A (en) * 1938-05-20 1939-07-31 Serva Technik A G Spray booth.
US2209054A (en) * 1938-03-31 1940-07-23 Olive M Doud Machine for circulating clean, deodorized, and sterilized air
US2234037A (en) * 1938-11-17 1941-03-04 B F Sturtevant Co Air conditioning system utilizing refrigeration
US2334776A (en) * 1941-09-17 1943-11-23 Merck & Co Inc Laboratory equipment
US2350735A (en) * 1942-04-27 1944-06-06 Egge Klaus Exhaust apparatus
US2380147A (en) * 1942-06-17 1945-07-10 American Viscose Corp Spinning machine control
US2397197A (en) * 1943-10-30 1946-03-26 Newman Morris Electrostatic precipitator apparatus
US2397731A (en) * 1942-06-16 1946-04-02 Harwood B Fowler Method and apparatus for radium coating mechanism
US2436508A (en) * 1947-03-18 1948-02-24 Edward Babcock Machine mounted hood device for protecting attendants from dust

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2209054A (en) * 1938-03-31 1940-07-23 Olive M Doud Machine for circulating clean, deodorized, and sterilized air
CH206257A (en) * 1938-05-20 1939-07-31 Serva Technik A G Spray booth.
US2234037A (en) * 1938-11-17 1941-03-04 B F Sturtevant Co Air conditioning system utilizing refrigeration
US2334776A (en) * 1941-09-17 1943-11-23 Merck & Co Inc Laboratory equipment
US2350735A (en) * 1942-04-27 1944-06-06 Egge Klaus Exhaust apparatus
US2397731A (en) * 1942-06-16 1946-04-02 Harwood B Fowler Method and apparatus for radium coating mechanism
US2380147A (en) * 1942-06-17 1945-07-10 American Viscose Corp Spinning machine control
US2397197A (en) * 1943-10-30 1946-03-26 Newman Morris Electrostatic precipitator apparatus
US2436508A (en) * 1947-03-18 1948-02-24 Edward Babcock Machine mounted hood device for protecting attendants from dust

Cited By (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1124890B (en) * 1957-03-01 1962-03-01 Licentia Gmbh Device to protect the workplace
US2999448A (en) * 1958-03-06 1961-09-12 Varian Associates Dust free work bench apparatus
US3028715A (en) * 1959-01-26 1962-04-10 Honeywell Regulator Co Fluid cleaning apparatus
US3095836A (en) * 1961-03-08 1963-07-02 Lab Furniture Company Inc Constructions for tables and like structures
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