US3096933A - Portable fume exhaust fan apparatus - Google Patents

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Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/60—Mounting; Assembling; Disassembling
  • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
  • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
  • F04D29/646—Mounting or removal of fans
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
  • B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
• • 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
  • Y10S454/00—Ventilation
  • Y10S454/903—Flexible ducts used for carrying air

Definitions

• FIGURE 1 is an elevational view of the portable fume exhaust fan apparatus adapted for attachment to a work bench upon which the welding or work operation is being 3,996,933 Patented July 9, 1963 performed and constructed according to one form of the invention
• FIG. 2 is a perspective view of the portable fume exhaust fan apparatus in which the same fan. head is used as with the first form but is supported from a wheeled pedestal upon the floor and constructed according to a modified form of the invention,
• FIG. 3 is a transverse sectional view of the fan head as viewed on line 3-3 of FIG. 2,
• FIG. 4 is a longitudinal sectional view of the fan head as viewed on line 44 of FIG. 3,
• FIG. 5 is a top perspective view of the damper control unit looking into the open top thereof
• FIG. 6 is a longitudinal sectional view of the damper control and outlet conduit that is extended through a window to exhaust the fumes to the atmosphere outside the building premises, and
• FIG. 7 is an enlarged longitudinal sectional view of the push-pull damper control wire.
• 10 represents a multiple fan head that can be located so that its fume intake end 11 can lie adjacent to a welding or similar fume producing work operation that may be performed on a bench 12.
• the fan head is supported on the bench in a detachable manner and for vertical adjustment by a C-clamp device indicated generally at 13 and which will be later described in detail.
• the fan head 10 has a rearwardly-extending tapered outlet portion 14 with a flange 15 to which a flange coupling 16 of a flexible conduit 17 is connected.
• This conduit 17 is sufiiciently long to permit adequate movement of the fan head 10 relatively to the bench 12 and the work area thereof.
• the flexible conduit 17 has a flange head 18 that is coupled to a depending flanged inlet 19 of a damper control unit 21 from which a horizontal exhaust conduit 22 extends.
• the conduit 22 is more or less fixedly supported to a window sill 23 and under a window section 2 4. This combined damper and conduit is light in weight and can be easily moved to any building outlet so as not to detract from the portability of the equipment.
• the exhaust conduit 22 and the damper unit 21 are fonmed of sheet metal and the damper unit is connected by its top open end 25 to the underside of the conduit 22 and fastening bolts 26.
• the damper unit 21 has a rounded rear baffle wall 27 to direct fumes upwardly and forwardly into the conduit 22.
• a damper plate 28 may close the unit opening 25 and is hinged on a cross pin 31 and urged by a torsion coil spring 32 reacting between an inclined forward wall 33 of the damper unit and the damper 28 to normally retain the damper 28 in its closed position over the opening 25.
• a Bowden wire assembly 34 which includes a Wire 35 attached to the damper plate outwardly removed from its hinge point and extends through a tube 36, which is preferably flexible and has an enlarged .rear end portion 37.
• a handgrip 38 is connected to the wire 35 so that it can be pulled through a longitudinal slot 39 in the side of the enlarged portion 37.
• An extension wire 41 that can be gripped by a hand turned clamp 42 on the portion 37 so as to hold the damper in any position between its closed and open positions, may be notched as indicated at 43 to identify the position of the damper and to render the turn clamp 42 more effective.
• the spring action upon the damper always urges the same toward its closed position and the clamp 42 holds the wire and the damper against the action of the spring 32.
• the damper is closed when the exhaust fume fan is not in use and may be opened 3 only partially when but one of the operating fans is being used in the fan head 19.
• the fan head 10 there are two electric motor fans 45 and 46 having respectively exhaust fan blades 47 and 48 arranged to exhaust fumes created by a welding or other fume-producing work operation through the intake lll. Both of these fans are disposed in a cylindricallyshaped head part .49 that has an external flange 56 at the inlet end 11 for the purpose of keeping the air from going outside of the head .part 49 as it is being drawn through the inlet 11 and a flange 51 that is connected to a flange 52 of the tapered head portion 14.
• the electric fans are supported by their motor on respective transverse shelf structure 53 and 54 extended across the interior of the head part and secured to the sides thereof as best viewed in 'FIG. 3.
• a clamp ring assembly 55 Extended about the head part 49 there is disposed and fixed a clamp ring assembly 55 that includes laterallyspaced split clamp rings-56and 57 and a balance piece 58 extending between the rings and running along the underside of the head part 49 and secured to the rings by respective clamp bolts 59 and61.
• the balance piece 58 has a series of adjusting holes 62 to any one of which a head 63 of a vertically-adjustable telescopic support shaft 64 of theC-clamp assembly 13 is attached by a pivot pin 65 on which the fan head is balanced for fore and aft tilting movement.
• the adjustable support 64 is retained in a clamp sleeve 67 for vertical adjustment therethrough and for swivel movement therein and held upon a C-clamp 68 by vertically-spaced clamp rings 69 and 71.
• the C- clamp 63 has a handgrip clamp screw 72 by which the C- clamp assembly 13 is made fixed to the work bench 12.
• the pivot pin 65 is attached to a shackle 81 having an eye 82 to which a. supporting cable 83 is attached.
• This cable 83 is suspended from a wheeled pedestal support indicated generally at 84.
• This wheeled support 84 has crossed foot extensions 85 from which there depends caster wheels 86.
• a fitting 87 is secured to the foot extensions 85 at the center thereof, and upwardly from which there extends a main support rod 88 on which the switch block 75 may be supported.
• This cable Winch 92 includes a hand crank 93, a roll 94, a ratchet wheel 95 that holds the roll 94 against turning when ratchet latch 96 engages the ratchet wheel 95.
• the cable 83 extends upwardly from the cable roll 94 over a pulley 97 carried on a top bracket fitting 98 and outwardly over a boom rod 99 that extends laterally and over a pulley 101 extending from an end, bracket fitting Hi2 and from which it is suspended to support the fan head 10.
• the fan head 10 can be elevated to the desired height or it can be lowered by disengaging the ratchet latch 96 from the wheel 95.
• the pivot pin 65 By locating the pivot pin 65 in any one of the holes 62 the fan head can be balanced or tilted from the shackle to have the proper inclination toward the work space to exhaust the fumes therefrom.
• Aportable fume exhaust fan apparatus comprising, in combination, an exhaust conduit adapted to be supported on a window sill beneath a window section, damper means in said conduit, a flexible conduit connected at one end in air tight relation to said first mentioned conduit, a flanged coupling on the other end of said flexible conduit, a fan head includinga cylindrical portion having a flange at one end and a tapered outlet portion having a fiange at each end, the flange at the smaller end being bolted to the flanged coupling of said flexible conduit and the flange at the other end being bolted to the flange of said cylindrical portion, the other end of said cylindrical portion being formed with an open fume intake, transverse shelves extending across said cylindrical portion, a pair of bladed exhaust fans mounted on said shelves, a pair of electric motors individually connected to said exhaust fans, an individual wire connected to each electric motor, a control block having an individual switch for each wire, a common wire extending to said control block from a source of electric power, a clamp
• said means supporting said pivot bolt comprises a vertically adjustable telescopic support shaft selectively secured in pivotal relation in one of said adjusting holes, a C-clamp, and split clamping rings securing said C-clamp to said adjustable telescopic support shaft for clamping said fan head to a support.
• a portable fume exhaust fan apparatus as defined in claim 1, wherein said vertically-adjustable means forsupporting said .pivot bolt comprises a pedestal support, a winch device carried on the pedestal support and pulley cable means extending from the winch device and to the pivot bolt and the balance piece of the clamp ring assembly.
• a portable fume exhaust system for exhausting fumes to a discharge area comprising in combination, a main exhaust conduit and supporting means in communication with the discharge area, a flexible conduit connected at its first end to said exhaust conduit in air-tight relationship, a coupling member at the second end of said flexible conduit, a fan head having a cylindrical impeller section and a reduced diameter connecting section secured to said impeller section, coupling means at the end of said connecting section remote from said impeller section and cooperating with and secured to the coupling member at the second end of the flexible conduit, a fume intake formed at the end of said impeller section remote from said connecting section, a pair of bladed exhaust fans within said impeller section, support means mounting said exhaust fans in axial alignment within said impeller section, a pair of electric motors individually connected to said exhaust fans, a pair of control switches,
• the means supporting the pivot bolt comprises a vertically adjustable telescopic shaft selectively secured in pivotal relation to one of said adjusting holes, a C-clamp, and clamping means rigidly securing said C-clamp to said adjustable telescopic support shaft for clamping said fan head to a support.
• a portable fume exhaust system according to claim 4 wherein said vertically adjustable means for supporting 6 said pivot bolt comprises a pedestal support, a winch device carried on the pedestal support and pulley and cable means extending from the winch device to the pivot bolt and the balance piece for supporting the fan head at selected vertical locations.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Description

Claims (1)

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=22274427

Family Applications (1)

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Cited By (48)

Citations (11)

• 1961
  • 1961-03-29 US US99313A patent/US3096933A/en not_active Expired - Lifetime

Patent Citations (11)

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