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Publication numberUS2489446 A
Publication typeGrant
Publication dateNov 29, 1949
Filing dateJul 19, 1946
Priority dateJul 19, 1946
Publication numberUS 2489446 A, US 2489446A, US-A-2489446, US2489446 A, US2489446A
InventorsBiancani Adolph T M
Original AssigneeBiancani Adolph T M
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Ventilator
US 2489446 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Nov. 29, 1949 A. 1'. M. B'lANcANl 2,489446 vENTILAToR Filed July 19, 1946 3 Sheets-Sheet l AT TORNEY 'Figure '7 is a Patented Nov. 29, 1949 'UNITED STATES PATENT OFFICE w VENTILATOR Adolph T. M. Biancani, Elko, Nev. Application July 179, 1946, Serial No. 684,636

7 o'lzims. (cl. 98-118) Vwhich can be used for movement of air in either direction, that is, either from the exterior into the room, or from the room to the exterior.

VA further object of the invention is to provide an improved ventilator having automatically operated closure means for the passage through the housing, characterized in particular by the fact that the Operating parts of the same are relatively simple in construction, positive in operation, and will function for long periods of time without frequent servicing or repairs.

An additional object of the invention is tofprovide an improved centrifugal operator for a ventilator of the above character.

` Another object of the invention is to provide improved means for looking the closures in closed position, and to provide improved means lfor effecting automatic unlocking of the same.

Further objects of the invention will appear from the following description in which the preferred embodiments are set forth in detail in conjunction with the accompanying drawing.

Referring to the drawing:

Figure 1 is a side elevational view of a ventilator incorporating the present invention.

Figure 2 is a view of the ventilator shown in Figure 1 but looking toward the front end of the same, with certain of the parts illustrated in section.

Figure 3 is a plan detail showing the spring means for urging the doors toward both closed and open positions.

-Figure 4 is a sectional view taken along the line 4-4 of Figure 1, but with the propeller and the means for supporting the electric motor being removed for clarity.

Figure 5 is a sectional view like Figure 4 but showing the closure doors in full open position.

Figure 6 is a sectional view taken along the line 6-6 of Figure 4.

sectional detail on an enlarged Scale taken along the line '-l' of Figura 4.

Figure 8 is a sectional detail showing a part of the Operating connection between the centrifugal operator and the closure doors.

The embodiment of the invention illustrated in the drawing consists generally of a housing IO which can be formed of suitable sheet metal, and which for convenience is cylindrical shaped and is adapted to be inserted in a wall ll .(Figure 4). Disposed axially within the housing there is a shaft |2 which can be extended from or directly coupled to the shaft of an electric driving motor |3. Suitable means such as the supporting arms |4 serve to carry the motor upon the housing.

Mounted upon the exterior face of the housing Ill are the closure doors IE. The inner adjacent edges of these doors are attached to the shafts I'l, which extend diametrically across the housing, and which have their ends pivoted or journaled within the pads or bosses 18, 19. The upper ends of the shafts |1 are provided with cranks 2|, which in turn are connected together by the tension spring 22. When the doors |6 are closed the spring occupies a position relative to the cranks 2| substantially as illustrated in Figure 3. However when the doors are swung to full open position (Figure 5) the cranks2| pass through dead center position with respect to the pull of the spring. Thus the spring tends to urge the doors toward full closed and full open positions, from an intermediate dead center position. It is desirable to have the cranks 2| together with spring 22 enclosed within the protecting cap 23. The peripheral edge portions `of the doors seat upon a sealing gasket 25 which can be made of resilient material such as rubber. Beyond the doors the housing can be provided with a hood lila.

The shaft of the motor is provided with a hub 24, to which the fan or impeller blades 26 are attached. These blades may be made to enable rotation in either direction, and are proportioned to operate within the housing Ill. For simplicity they are illustrated diagrammatically by dotted lines in Figures 4 and 5.

A novel type of centrifugal operator 28 is mounted upon the shaft |2 adjacent the fan. This operator consists of a plurality of arcuate or curved members 23, which have considerable weight, including if necessary the weighting 3| on their outer free ends. The inner ends of members 29 have pivotal connections 32 with the ears 33.. These ears are fixed to a hub 34, which together with the hub 24 of the impeller, is fixed to the shaft.

A collar 36 is slidably carried by the shaft ll, and certain parts connect this collar to the doors |6 and to the latching means to be presently described. Acting between the collar 35 and the members 29 there is a thrust transmitting device 31. Collar 36 carries an oil sealed bearing assernbly, the inner sleeve of which is attached to device 31 and slidable longitudinally upon the shaft |2. A plurality of tension Springs connect between the device 31, and the hub 25: of the impeller. Members 4| extend radially from the device 31 and provide spaced ears between which the members 29 are accommodated. Rollers Q3 are mounted between the ears i and receive thrust from the member 29. The journaling of device 31 relative to the hub 35 is such that when forces are applied to device 3? to move the longitudinally of the shaft, such movement is transmitted to the collar 35. When shaft i is rotated at a proper` speed oorresponding te a minimum normal speed of operation, members 23 swing outwardly by centrifugal force, thus transmitting longitudinal movement to device 3-5 and collar 36 against the urge of Springs 39. 'When the shaft is permitted to come to rest members 29 swing inwardly and the parts return to their initial positions shown in Figure 4.

Means are provided for connecting the collar 36 with the door Hi to effect opening and closing movements of the same. The means illustrated consists of arms 44 mounted upon collar 35 and extending radially from the same, and which have pivotal connections l with the extensible links designated generally at 47. These links in turn have pivotal connections with the doors Hi, the connections being located on cpposite sides of shafts I'l (Figures 4 and The extensible 'links ll'l can be formed substantially as illustrated in Figure S. Briefiy they consist of inner and outer telescoping members 41a, 4'lb, together with a compression spring 5| serving to urge these members apart Member 41a is shown provided with a flattened side 52, serving to accommodate the stop pin movement of members dla, ll'lb toward each other is limited by engagement of shoulder 54 with the pin 53. Likewise the shoulder 58 strikes a pin 53 to limit movement of members lila, ilb apart. When collar 36 is moved by the centrifugal 28 toward the doors IB, thrust is transmitted through the links 41 (with pin 53 and shoulder 54 in contact) to rotate the doors past dead center position with respect to spring 22. Thereafter the doors move quickly under the urge of spring 22 to the full open positions shown in Figure 5, and to acoommodate such movements parts Lila, ll'lb extend to bring pin 53 in engagernent with shoulder 56. When driving of the shaft is discontinued and collar 36 caused to move back to the position illustrated in Figure 4, the doors are pulled toward closed position past dead center position, and thereafter the doors quickly move under the urge of spring 22 to full closed position.

In conjunction with the parts described ah I provide latching means which engag automatically, and which is automatically released forces from the centrifugal device 23. rlhus I provide extensible links 58 which have thr ends pivotally connected at ic to the arms of the hub 38, and which have their outer ends provided With pivotal connections 59 to the side walls of the housing I O. Each of these links consists of an inner rod 58a and an outer sleeve part 58h, which interfit telescopically as shown in Figure 7.

nr ma 1:3

Rod 58a is shown provided with a fiattened portion 6| to accommodate a leaf spring Gil. This leaf spring can be attached to rod 53a to frictionally engage the inner wall of sleeve 58h, and serves to provide a small amount of friction between the parts and to avoid rattling.

Mounted upon each link part 58a, by pivotal connection 62, there is a latch finger 53. A part of this finger is formed by the adjustable stud 54l, which has a rounded and generally conical shaped head 66.

In order to limit movement of the latch finger in one direction it is provided with an arm B7 carrying an adjustable stop screw 58. The end of this screw engages an adjacent portion of the rod 58a, thus limiting rotation of the latch in one direction. Each latch finger is also provided with a spring 69 or like means tending to rotate the same in a direction to bring the screw 63 into contact with the adjacent rod a. In other words as viewed in Figure 5 the left hand latch 'finger 83 is urged in a clockwise direction, and

the right hand latch finger is urged in a counterclockwise direction.

The doors if are provided with latch plates 'll positioned to engage the heads and to latch behind the same when the doors are swung to fnll closed position. Figure 4 illustrates the latch fingers locked with respect to the latch plates ll. When the motor l3 is started in operation and the centrifugal device 28 starts to move the collar '36 toward the doors l, the extensible links 58 'are initially swung about the pivotal connection 59 to thereby swing the latch fingers 63 free of the latch plates 1|. This initial movement of the extensible link 53 is accommodated by lost motion in the links 'i, whereby all of the effective force of the centrifugal device is initially applied for the unlatching action. Thereafter further movement of the collar 35 swings the doors to full open positions as previously described. When the doors snap back to full closed position latch plates 'll slide over and past the conical shaped heads to finally latch in full closed position in the manner illustrated in Figure 4. Thus when the ventilator is not in use the doors are locked closed, unauthorized tampering from the exterior is prevented, and the passage through the ventilator housing is sealed with respect to the interior.

It will be evident from the foregoing that I provide simple and effective mechanism enabling .opening and closing of the doors automatically,

simple in construction, and can be readily ac- .ccmmcdated for different sized fans and ventilators. The quick opening and closing action of the doors l insures full opening action for normal operation of the ventilator, and also insures i proper looking with the latch fingers 53. In addition the doors and their Operating mechanism is such that the operation of the same does not detract from the emciency of operation of the fan.

I claim: l. In a ventilator, a housing adapted to "ce inserted in a wall, a rotatable shaft carried by the housing, a motor serving to drive the shaft, an

air moving fan mounted upon the shaft for moving air through the housing, closure doors pivotally carried by the housing and movable between open and closed positions with respect to the passage through the housing, spring means connected to move the doors toward either closed or open positions from an intermediate dead center position, centrifugal Operating means carried by the shaft, and means connecting the centrifugal operating means to the doors to force said doors past said dead center position to cause automatic opening of the doors responsive to rotation of the shaft and to force the doors past said dead center position to close the doors responsive to permitting the shaft to come to rest.

2. In a ventilator, a housing adapted to be inserted in a wall, a rotatable shaft carried by the housing, a motor serving to drive the shaft, an impeller mounted upon the shaft for moving air through the housing, a pair of closure doors having adjacent edges of the same pivoted to the housing on axes extending generally diametrically across the housing, said doors being movable between limiting open and closed positions with respect to the passage through the housing, spring means connected to the doors to move the same toward either closed or open positions from an intermediate dead center position, centrifugal Operating means carried by the shaft within the housing and adjacent one side of the closed doors, and means connecting said centrifugal means to said doors to force the same past said dead center position in a direction to open the doors when the shaft is rotated and to force said doors past said dead center position in a direction to close the same when the shaft is permitted to come to rest.

3. In a ventilator, a housing adapted to be inserted in a wall, a shaft carried by the housing, a motor connected to drive the shaft, a propeller mounted upon the shaft for moving air through the housing, closure doors pivotally carried by the housing and movable between open and closed positions with respect to the passage through the housing, centrifugal Operating means carried by the shaft, latching means for latching said doors in closed position, means connecting the centrifugal Operating means to the doors to open the same upon rotating the shaft and to close the same when the shaft is permitted to come to rest, and means actuated by said centrifugal Operating means to release the latching means responsive to rotation of the shaft.

4. In a ventilator, a housing adapted to be inserted in a wall, a shaft disposed axially of the housing, an impeller mounted upon the shaft and serving to move air through the housing, a motor connected to drive the shaft, a pair of closure doors pivotally carried by the housing and movable between open and closed positions with respect to the passage through the housing, centrifugal Operating means carried by the shaft, latching means for locking the doors in closed position, and connecting the centrifugal operating means to the doors, said last means serving to operate the doors between open and closed positions, and means actuated by said centrifugal Operating means to automatically release said latching means.

5. A ventilator as in claim 4 in which said latching means includes latch fingers adapted to engage latch plates on the doors.

6. A ventilator as in claim 4 in which said last means for connecting the centrifugal operating means to the doors includes a lost motion connection, and in which the connection between the latching means and the centrifugal operating means releases the latching means pror to applying opening movement to the doors.

'7. In a ventilator, a housing adapted to be inserted in a Wall, a shaft disposed axially of the housing, an impeller mounted upon the shaft serving to move air through the housing, a motor connected to drive the shaft, closure doors pivotally carried by the housing and movable between open and closed positions with respect to the passage through the housing, centrifugal operating means carried by the shaft, means connecting the centrifugal Operating means to the doors to operate the doors between open and closed positions responsive to rotation and stoppage of the shaft, latching means for locking the doors in closed position, said latching means including latch devices movable between latch engaging and release positions, and means connecting said latch devices to said centrifugal operating means to move said latch devices between release and engaging positions responsive to ro-` tation and stoppage of the shaft.

ADOLPH T. M. BIANCANI.

REFERENCES CITED' The following references are of record in the file of this patent:

UNITED STA'I'ES PATENTS FORE'IGN PATENTS Country Date Germany July 9, 1903 Number Number

Patent Citations
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US1648796 *May 20, 1926Nov 8, 1927American Warming VentilationReversible ventilation
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2668491 *Aug 16, 1950Feb 9, 1954Robbins & MyersPower roof ventilator
US2738124 *Jan 29, 1953Mar 13, 1956Tripar Products IncVentilators
US2924166 *May 21, 1957Feb 9, 1960Robbins & MyersFan operated damper blade latch
US5288202 *Mar 31, 1993Feb 22, 1994Euroemme S.P.A.Centrifugal regulator device for opening and closing the shutter of an axial electric fan unit and an electric fan unit utilizing this device
US7611403 *Nov 14, 2005Nov 3, 2009Ctb, Inc.Method and apparatus for a ventilation system
US9157453 *Aug 23, 2011Oct 13, 2015Ctb, Inc.Plastic fan shroud and cone assembly and method
US20060105696 *Nov 14, 2005May 18, 2006Ctb, Inc.Method and apparatus for a ventilation system
US20110183600 *Jan 14, 2011Jul 28, 2011Ctb, Inc.Air check valve system and method of mounting same
US20130051999 *Aug 23, 2011Feb 28, 2013Ctb, Inc.Plastic fan shroud and cone assembly and method
US20160010651 *Sep 23, 2015Jan 14, 2016Ctb, Inc.Plastic Fan Shroud And Cone Assembly And Method
EP0563875A1 *Mar 30, 1993Oct 6, 1993EUROEMME S.p.A.A centrifugal regulator device for opening and closing the shutter of an axial electric fan unit
WO2016139601A1 *Mar 2, 2016Sep 9, 2016Termotecnica Pericoli S.R.L.Fan with centrifugal governor device for automatic shutter operation
Classifications
U.S. Classification454/351, 454/353
International ClassificationF04D25/14, F04D25/02
Cooperative ClassificationF04D25/14
European ClassificationF04D25/14