US3307472A - Venetian blind-type shutter - Google Patents

Venetian blind-type shutter Download PDF

Info

Publication number
US3307472A
US3307472A US357593A US35759364A US3307472A US 3307472 A US3307472 A US 3307472A US 357593 A US357593 A US 357593A US 35759364 A US35759364 A US 35759364A US 3307472 A US3307472 A US 3307472A
Authority
US
United States
Prior art keywords
slats
slat
gravity
plastics
top edge
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
US357593A
Other languages
English (en)
Inventor
Muller Ernst
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
Application granted granted Critical
Publication of US3307472A publication Critical patent/US3307472A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/165—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with a plurality of closure members
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E06B7/08—Louvre doors, windows or grilles
    • E06B7/084—Louvre doors, windows or grilles with rotatable lamellae
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1486—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by bearings, pivots or hinges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/15—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre with parallel simultaneously tiltable lamellae

Definitions

  • the invention relates to a shutter for a fan or blower and particularly to those equipped with a number of superimposed slats or louvres which normally hang vertically. These slats are pivotally mounted in the vicinity of their upper edges and can be swung into a substantially horizontal position either by hand or under the action of the air pressure or vacuum exerted by the fan or blower.
  • Plastics slats compared with those of light metal such as aluminum, have the advantage that, even with very humid acidic air like that extracted from stables and even after a very long period of operation, they remain free from corrosion and do not form electrolytic cells with the metals of other components, such as the pivotal shafts.
  • the invention aims to provide an improved shutter for which the slats can be made rapidly and cheaply without a great deal of labour and material and, although being stable with a sufficiently strong closing force, can be swung into a substantially horizontal position with a very low opening force,
  • a Venetian blind-type shutter comprises slats each of which is pivoted about an axis in the vicinity of its top edge so as to hang in a substantially vertical plane under gravity or be swung out of the vertical under the influence of the air stream set in motionby the fan or blower, wherein each pivotal axis divides the associated slat into two imaginary portions of which the upper portion (as viewed in the hanging position) presents a smaller surface area to the air stream and is heavier than the lower portion.
  • the closing force is achieved in that the heavier portion above the pivotal axis tends to swing the lighter portion because of the difference in torque, i.e. the slat is in unstable equilibrium; Each slat lies on the surface of the underlying slat and the closing force is produced by the torque which acts on the lower surface of the slat to bring it into stable equilibrium.
  • the difference between the surface areas is necessary to make opening possible when the fan is switched on. The heavier surface then swings against the direction of air flow.
  • the upper portion is made of a material of higher specific weight, such as metal, in contrast to the lower portion which can be made of plastics material.
  • the slats are of plastics ma- Patented Mar. 7, 1967 terial and metal rails which also carry a pivotal shaft, are attached to the upper portion.
  • the meta-l rails may be joined to the plastics by riveting or impressing or they may be inserts in an injection moulding process, and the slat may be in sheet or foil form.
  • the portions above the pivotal axis may be in supporting form.
  • the plastics slats are of uniform thickness and their top edges have a widened portion similar to the profile of the supporting fins.
  • An extrusion process is used for this embodiment. Care must be taken that no great variations in section obtain along the extruded profiles, in order to prevent the profile from warping. Metal bars are subsequently placed in the pocket formed in this way.
  • the slat can be made of a material of uniform thickness which is folded back on itself along the upper edge to form an elongated flat pocket.
  • the material is again concentrated above the center of gravity when the slat hangs vertically.
  • the weight of this conwntrated material in conjunction with the arrangement of the pivotal shaft beyond the center of gravity, produces a closing moment in the opposite direction to the airstream, and this ensures that the individual plastics slats bear on one another with a suflicient closing force.
  • the slats are made of material of uniform thickness which is folded back along the top edge to form an elongated flat pocket which widens the profile.
  • the invention provides for metal inserts to be arranged in the material of the plastics sheet between the top edge and the pivotal axis so as to displace the center of gravity towards the top edge.
  • the metal inserts are in the form of fiat bars and are arranged inside the pocket. If the metal inserts are arranged and designed in this way, cheap commercial strip material can be used and can be inserted in the pocket in the simplest manner.
  • the metal inserts are in the form of round rods which are readily commercially obtainable and cheap.
  • the advantage of using rod inserts is that the plastics material need not be folded sharply back along the top edge.
  • the resultant flat pocket has a drop-shaped profile, which is known to have favourable aerodynamic characteristics.
  • the pivotal shaft can be arranged in the pocket adjacent the metal insert but closer tothe center of gravity of the profile.
  • the pivotal shaft may advantageously also be in the form of a commercially obtainable metal bar.
  • the slat according to the invention can be produced by using very little labour on assembly. 1
  • FIG. 1 is a part-sectional fragmentary view of a sh-utter as seen in the direction of air flow
  • FIG. 2 is a section taken along the line II-II in FIG. 1,
  • FIG. 3 is a part-sectional fragmentary view of a modified embodiment
  • FIG. 4 is a section taken along the line IVIV in FIG. 3,
  • FIGS. 5 and 6 are fragmentary sections of one of the slats of FIG. 2 but on a much larger scale, and showing the location of the center of gravity in two positions of the slat,
  • FIG. 7 is a cross-section through a flat slat
  • FIG. 8 is a side elevation of FIG. 7.
  • FIGS. 1 and 2 show superimposed plastics slats 1 which normally hang vertically and which are each equipped with a pivotal shaft 2 arranged in the vicinity of the top edge 3 of the slat.
  • the shaft 2 extends beyond both sides of the slat and these extensions are mounted in bearings 4 forming part of the shutter.
  • the slats 1 are made of plastics material of uniform thickness which is folded back along the top edge 3 so as to form an elongated narrow pocket 5 along the whole length of the slat.
  • the pivotal shaft 2 is pushed through this elongated narrow pocket 5.
  • a metal insert in the form of an elongated flat bar 6 is inserted in the pocket 5 above the shaft 2; the bar 6 also secures the shaft 2 inside the pocket.
  • the arrangement of the pocket 5 at the top edge 3 of the slat 1 gives the latter considerable longitudinal stability. This is further increased by the insertion of the metal bar 6, so that very thin plastics material may be used for ma king the slat 1. In view of the low weight of very thin plastics slats it may happen that the metal bar 6 is too heavy if it is of the same length as the slat. In such a case the bar '6 may be shortened acwrding to requirements, as shown in FIG. 1,
  • the material of the slat 1 is folded back with a slight curve at the top edge 3 instead of sharply.
  • metal inserts in the form of round bars 13 any gap left between the bar 13 and the shaft 2 can be filled in with a plastics bar 14.
  • a plastics fin designed in this way has a substanitally drop-shaped or streamlined profile, which offers little resistance to the airstrea'm when the slat is swung out.
  • lower portion 15 of the slat is of plastics sheet. It is joined to the upper portion 16 above the shaft 2 by a projection 17 in a construction similar to a slot and feather connect-ion. The projection may be pressed or stuck into the slot in the sheet 15. The top edge 3 may be rounded in order to reduce the flow resistance when the slats are substantially horizontal upon airflow in the direction of the arrow 8.
  • the invention can be used in all cases, irrespective of what materials are used, wherein slats are opened or closed by air flow, the center of gravity being displaced by varying the specific weight above and below the pivotal axis, so that the difference is small enough to produce a closing force which can easily be overcome. If the same material were used, the difference would be great enough to make the closing force excessive, in which case there would be a considerable reduction in the efiiciency of the fan and in the amount of air supplied.
  • a ventilator shutter including fan means comprising slats of one-piece construction each of which is pivoted about an axis adjacent its top edge to define upper and lower portions, said slats adapted to hang in a substantially vertical plane under gravity and adapted to be also swung out of the vertical under the influence of an air stream set in motion by the fan means, and wherein each pivotal axis divides the associated slat into two portions of which the upper portion presents a smaller surface area to the air stream than the lower portion, means for pivoting the slats, the upper portion of each slat having a higher specific gravity than the lower portion, inserts mounted in the slats between their top edges and their pivotal axis, the upper section of each of said slats being bent to form pockets, andwherein the said inserts consist of bars positioned in said pockets provided in the slats.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Blinds (AREA)
  • Air-Flow Control Members (AREA)
US357593A 1963-04-10 1964-04-06 Venetian blind-type shutter Expired - Lifetime US3307472A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH48810A DE1295785B (de) 1963-04-10 1963-04-10 Lamelle fuer eine Ventilatorjalousie

Publications (1)

Publication Number Publication Date
US3307472A true US3307472A (en) 1967-03-07

Family

ID=7156834

Family Applications (1)

Application Number Title Priority Date Filing Date
US357593A Expired - Lifetime US3307472A (en) 1963-04-10 1964-04-06 Venetian blind-type shutter

Country Status (5)

Country Link
US (1) US3307472A (xx)
DE (1) DE1295785B (xx)
FR (1) FR1390724A (xx)
GB (1) GB1060977A (xx)
NL (2) NL6403854A (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3120043A1 (fr) * 2021-02-24 2022-08-26 SNCF Voyageurs Montage de ventelle pour lanterneau de véhicule ferroviaire

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2423629A1 (fr) * 1978-04-19 1979-11-16 Alsthom Cgee Ouie de ventilation d'une galerie
DE19652397A1 (de) * 1996-12-17 1998-06-18 Behr Gmbh & Co Kühlerjalousie
CN106594302B (zh) * 2017-03-13 2020-01-07 广东环葆嘉节能科技有限公司 风量调节阀
DE102018001140A1 (de) * 2018-02-13 2019-08-14 Langmatz Gmbh Lüftersystem

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1272064A (en) * 1914-11-30 1918-07-09 Max Lezius Automatic damper for stoves and furnaces.
GB398176A (en) * 1932-01-30 1933-08-30 Mykas Adamcikas Improvements in or relating to self-adjusting shutters in air flow conduits
GB485850A (en) * 1938-01-21 1938-05-25 Derek Richard Barker Improvements in and relating to shutters for use with blower ventilating fans
US2355412A (en) * 1943-02-18 1944-08-08 Homer M Bird Ventilator shutter
US3204548A (en) * 1963-11-29 1965-09-07 Air Balance Damper construction

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR423014A (fr) * 1910-11-21 1911-04-05 Henri Joseph Machue Appareil d'aération
US1706280A (en) * 1925-08-07 1929-03-19 Buffalo Forge Co Automatic shutter
US1872599A (en) * 1928-02-25 1932-08-16 Carrier Engineering Corp Louver or damper device
GB807553A (en) * 1955-09-12 1959-01-14 Ruben Osvaldo Perrone Improvements in or relating to control shutters

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1272064A (en) * 1914-11-30 1918-07-09 Max Lezius Automatic damper for stoves and furnaces.
GB398176A (en) * 1932-01-30 1933-08-30 Mykas Adamcikas Improvements in or relating to self-adjusting shutters in air flow conduits
GB485850A (en) * 1938-01-21 1938-05-25 Derek Richard Barker Improvements in and relating to shutters for use with blower ventilating fans
US2355412A (en) * 1943-02-18 1944-08-08 Homer M Bird Ventilator shutter
US3204548A (en) * 1963-11-29 1965-09-07 Air Balance Damper construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3120043A1 (fr) * 2021-02-24 2022-08-26 SNCF Voyageurs Montage de ventelle pour lanterneau de véhicule ferroviaire

Also Published As

Publication number Publication date
DE1295785B (de) 1969-05-22
GB1060977A (en) 1967-03-08
NL6403854A (xx) 1964-10-12
NL7208030A (xx) 1972-08-25
FR1390724A (fr) 1965-02-26
NL151182B (nl) 1976-10-15

Similar Documents

Publication Publication Date Title
US3123098A (en) Multiple louver damper
US3307472A (en) Venetian blind-type shutter
US3215058A (en) Air curtain apparatus
US3204548A (en) Damper construction
CN103388893B (zh) 防凝露的空调器出风口结构
CN107860111A (zh) 自动阻隔被动气流的进风装置及空调主机
US4654198A (en) Dynamic air deflector
US6190122B1 (en) Intake and exhaust air damper with movable motor fan assembly
CN203656299U (zh) 自适应气体恒流量阀门
US2998765A (en) Pivotal louver assembly
CN210433084U (zh) 一种防潮的档案柜
CN216734733U (zh) 一种易于拆卸安装的船用菌型通风筒结构
US532452A (en) Furnace attachment
US1956507A (en) Threshing machine adjustable sieve
CN210569575U (zh) 一种风门角度可变的侧进风侧出风烘干房
NL2021693B1 (nl) Gevellamel
US3027823A (en) Awning vent window
US2500330A (en) Grille
US2470375A (en) Ventilator
US3124055A (en) rubera
DE1753283A1 (de) Einrichtung zur Belueftung von Raeumen,insbesondere Viehstaellen
CN207081185U (zh) 空调室内机
US924479A (en) Ventilator.
US1313460A (en) Constructive design of face-plat
CN106379663A (zh) 通风结构