Патент USA US2403602код для вставки
July 9, 1946, W. H. KlTTO 2,403,602 SUCTION CLEANER Filed Jan. 28, 1944 4 Sheets-Sheet 1 y_.v.. ` .~;l. -. . . INVENTOR. William IZ Killa July 9, 1946» w. H. Kn'To 2,403,602 SUCTIQN CLEANER 4 sheets-sheet 2 l Filed Jan. 28, 1944 l K 6.9 .'rNVENToR. m’llialß Hl?illo BY' @SW Patented July 9,1946 i 2,403,602' ' UNITED STATES PATENT FFECE 2,403,602 SUCTION CLEANER William H. Kitto, Greentown, Ohio, assigner to The Hoover Company,‘North Canton, Ollio, a corporation of Ohio Application January 28, 1944, Serial No. 520,043 3 Claims. (Cl. 18S-»57) l 2. The present invention relates to suction clean Figure 4 is a partial section upon the line ti--d A ers in general and more particularly to a suction cleaner incorporating a dirt separator with auto of Figure 2 and shows the pressure-responsive means which initiate the filter-cleaning oper matic cleaning features. More particularly the invention comprises a suction cleaner of the type ation; ' ` Figure 5 is a view looking in the direction of including an initial dirt separator and a iinal dirt-separator in combination with means which the arrows upon the line 5_5 of Figure 4 and shows the pressure-controlled locking means "for the stator; automatically clean the final' dirt separator re turning the collected foreign material to the in Figure 6 is a section through the motor upon .itial separator. Still more speciñcally the inven 10 the line 6-8 of Figure 1 and shows an end- view of the motor field and armature; Figure 7 is a diagrammatic view of the electri cal circuit of the machine; clean same. . Figure 8 is a view similar to Figure 1 of a , It is an object of the present invention to pro*l 15 second preferred embodiment of the invention. vide a new and improved suction cleaner.. It is In cleaners of the type to> which the present ' tion relatesto a new and novel nozzle-actuating mechanism in a suction cleaner incorporating a dirt collecting iilter and automatic means to _ another object of the invention to provide a new invention relates, to wit, suction cleaners in and improved suction cleaner of the type in corporating initial and final dirt separators and automatic means to clean the final dirt sep arator and return the collected material to the initial dirt separator. A further object of the invention is to provide a suction cleaner in corporating a dirt separator and cleaning means for that separator which are actuated -by new and novel means. A still further object of the invention is to provide a suction cleaner in which a. dirt-collecting ñlter is cleaned by a movable nozzle which is driven by the motor stator, the motor armature being connected to the suction creating means. Still another object of the in vention is to provide a suction cleaner in which cleaning air is _drawn~ through an initial sep arator by suction-creating means which exhaust clean air to a final dirt separator incorporating a ñlter, the suction-creating means being driven by the rotatable armature of a motor the-stator of which propels the filter-cleaning’nozzle rela tive to the ñlter. These and other more speciiic objects will appear upon reading the following »speciñcation and claims -and upon considering corporating a dirt separator with means to re in connection therewith the attached drawings to which they relate. ' Referring now to the drawings in which pre ferred embodiments of the present invention are disclosed: _ Figure 41 is a longitudinal section of the cleaner with the rear portion of the nozzle conduit shown upon the line l-I of Figure 2 to illustrate the gearing for driving the escapement mechanism; move foreign material therefrom, the problem of20 actuating the separator~c1eaning means auto-l matically and' at a desirable speed is a serious» one. The normal suction-creating fan rotates. at 10,000 R. P. M. or more and its driving motor _is iixedly attached thereto. To actuate the . 25 cleaning means for the dirt separator from this motor requires. some form of speed reduction which will enable the älter-cleaning nozzle to rotate at approximately 5A to 10 R. P. M., al-though slightly higher speeds are acceptable. Inl the present invention the filter-cleaning nozzle is driven -by the field, usually known as the stator, of the motor which actuates the suction creating fan unit.v The stator is normally fixed in position but is rotatable during „the operation 35 of the älter-cleaning nozzle. Automatic meansl are provided which initiate and end the oper-. ation of the filter-cleaning nozzle. ì dust pan or container Il is formed fixedly upon the removable end cap 6 and is removable there with from the casing. . Figure 3 is a partial section upon the line 3~3 of Figure 2 and shows the solenoid-controlling switch;~ ‘ n ‘ ' - . _ to comprise a main-elongated cylindrical casing I which is slidably carried byl side runners 2 andwhich is provided on »its top with a suitable handle 3. Cylinder í~ is closed at its ends by 45' caps 4 and 6. the latter being sealed tothe end: of casing I in air tight relationship by a seal 'l and lbeing provided with a suitable indented' handle 8 which enables the operator to move the cap lengthwise of the casing after the latch 50 ing means 9 have been manually released. A Figure 2 is a vertical transverse section upon the line 2-2 of Figure 1; . Returning now to the drawings a preferred embodiment of the invention is illustrated in 40 Figures 1 to '1, inclusive. The cleaner is seen. 55' The interior of casing l lis transversely divided by three spaced walls- l2, I3- and i4, each'of the' 2,408,602 3 4 latter two walls being a double wall with slightly cleaner end of a dusting tool unit when it is de- > spaced sides. ' ` sired to use the machine asa'blower. A truncated cone I6 extends forwardly from wall I2 which is centrally apertured to form, with the interior of a cylinder I1 extended between walls I2 and I3, a whirl chamber I5 the inner end of which is defined by a transverse wall I8. Within the cylinder I1 and rearwardly of the wall I8 is a stationary multi-vaned deilector I9 which Within the dirt separator chamber 58, and rig idly attached to the motor frame-casing 4I, is a iilter-cleaning nozzle 66. A hollow conduit 61 extends from the nozzle 66 in the longitudinal flector I9 suction-creating fans 22 and 23 are carried by the extended end of a motor shaft 24, the motor being positioned upon the opposite side of the double wall I3 which forms the inner end sleeve 1I cooperates with a seal 12 to prevent the collection of foreign material upon the spring and the bearing 68. The rearward extremity of conduit 61 seats rotatably in a stationary conduit 13 which extends transversely to pass along the top of the casing and to connect to the inlet 29 of the‘whirl chamber I5. A pivoted valve 14 inA conduit 13 controls the flow of air through the nozzle and the conduit. axis of the motor and to a central aperture in the double plate I4, being rotatably mounted in a suitable bearing 68. A coil spring 69 surrounding cooperates with the casing I1 to form a two stage lo' shaft 61 abuts the bearing 68 and a shoulder upon the shaft to take up end play. An enclosing fan .chamber 2I. Upon opposite sides of the de of the ian chamber 2 l . _ _ A port at 26, of a type adapted to seat re movably a dusting tool hose 21 carrying a suit» able nozzle 28 at its outer end, is connected by a tangentially extending inlet conduit 29 to the whirl chamber I5. The latter is itself open to the first stage of the fan chamber 2l through an elongated inlet 3I provided with a strainer 32 at its outer end. The first stage of the fan chamber connects through the centrally apertured deilec tor I9 to the second stage which is provided with a plurality of circumferential exhaust ports 33 opening into an enclosing circular conduit 34 leading to ports 36 in wall I3 in order that air exhausted from the fan chamber may pass rear lAs the nozzle 66 is iixedly connected to the motor stator at the frame-casing 6I thereof it is clear that both the stator and the nozzle must rotate in order for the nozzle to contact the en tire inner surface of the filter 51 which must be cleaned from time to time. The normal driving motor has its stator fixed but in the present in stance the frame-casing 4I is rotatably mounted, as described, at one end by the bearing di and at 30 the opposite end through‘the nozzle 66 and con The driving motor for the suction-creating fans 22 and 23 is positioned rearwardly of the double wall I3 with its shaft 24, being supported therein by a bearing 38. The rearward extremity of shaft 24 is supported in a second bearing 39 carried by duit 61 in the bearing 68. It is clear that in mo tor operation the reactive forces present tend to rotate the f‘leld and frame-casing fixed thereto in one direction while the armature 42, together with the fans 22 and 23 secured thereto, is urged in the opposite direction. It is necessary. how i the motor frame-casing 4I. The motor armature ever, that the filter-cleaning nozzle rotate at a and commutator 42 and 43, respectively, are of very slow speed and that this rotation take place only when it is desired to clean the filter. To provide this operation the following mechanism is provided. wardly therethrough. course fixed upon the shaft 24 and rotate with it while the motor field or stator 44 and com . mutator brushes 46 Vare carried by the frame. casing 4I which is itself‘rotatably mounted in a. compound bearing structure 41 carried by the rearward face of the wall I3. «As the motor field 44 is mounted-for rotation it is necessary to pro vide a pair of stationary slip rings 48 and a pair of cooperating brushes 49 on the field. The rings are carried by an insulating plate 5I fixed to the wall I3 and are supplied with current through leads 52 which extend rearwardly along the un derside of the main casing I to connect to _a man ually operable switch 53 which is itself connected to the incoming power leads 54. The electrical circuit of the motor is illustrated in Figure 7 and will be discussed later, it being sumcient _here to point out that it is capable of giving two speeds of rotation and is controlled by a switch 50 car ried by and rotatable with frame-casing 4I, Spaced concentrically within the main casing I A gear 11 is keyed to hollow shaft 61 inside ' the double wall I 4 and is rotatable with the nozzle 66. In mesh with the gear 11 is a second small dlameter gear 18 keyed to a shaft 18 rotatable in bearings 80 and 8| in the sides of the double wall I4 and extended rearwardly from that wall to carry flxedly a crank arm 82. Crank arm 82 pivotally connects to a link 83 which at its c_‘po site end pivotally connects to a second crank arm 84, as is clearly illustrated in Figure 2. Crank arm 84 is keyed to a shaft 86 which ñxedly carries -a valve element 81 formed with a small aperture 88 at a midpoint and movable angularly within a casing 89 with the walls of which it makes substantially sealing contact. - Casing 89 is flxedly mounted on the rear face of double wall I4, is fluid and air tight, and is adapted to contain either a fiuid or air, to provide a resistance to and carried at one end by an inwardly-extending 60 thearcuate movement of the flat valve 81. The valve Velement and its casing constitute an escape collar 56 adjacent wall I3 and at its opposite end ment which limits the speed of rotation of the upon a shoulder on the double wall I4 is a cylin motor stator and nozzle 66. .The relationships drical filter 51. The chamber 58 within the filter of the crank arms 82 and 84 and the'link 83 is 51 in which is located the driving motor may be referred to as the final filter chamber or dirt 65 such that the crank arm s2 rotates continuously during the rotation of the nozzle while the crank separator chamber. The chamber immediately arm 84 which is flxedly connected to the valve outside thereof is known as the discharge cham 81 moves in an arcuate path between the limits ber and bears the reference charactel` 59. Filter shown in dotted lines in Figure 2. Clearly the chamber 58 is connected to the exhaust ports 33 of the fan chamber by the ports 36 and ring con 70 selection of the gear ratio and of the size of the aperture 88 will determine the exact load placed duit 34, while discharge chamber 59 is open upon the motor stator and so will determine its through ports 6I in the double wall I4 to the space rotational speed when released. between that wall and the rear cover 4. An ex It is not desired that the filter-cleaning nozzle haust port 62, similar to intake port 26 is formed in cover 4 and is adapted to receive and seat the 15 66 operate at all times but instead only when the 2,403,608 7 . 8 , i _ plished merely by releasing manually the latch is itself immovably mounted at its forward end upon the wall |3. Casing |26 is shaped similarly to the motor which it encloses and is provided in 9, of which there may be one or more and pulling its rearward wall with a bearing |21 which ro From time to time it is necessary for the dirt container II to be emptied and this is accom the end plate 6 longitudinally outward by the use of the depressed handle 8. After being removed tatably `>supports the extended end of the motor the foreign material is readily emptied from the shaft 24. The filter-cleaning nozzle 66 is rotatably sup dirt container || in an obvious manner. There ported at the double wall I4 as in the first em bodiment but at its side adjacent the motor in again ready> for operation. 10 stead of being flxedly connected to the frame casing 4| is formed with an integral cylindrical Attention is directed to a reñnement com cup portion |28 which is rotatably mounted upon prising the means by which the speed of rotation a bearing |29 carried by an axially projecting of the armature ' 42 is increased during the neck |3| formed upon the supporting housing.y operation of the ñlter-cleaning nozzle in order |26. that the suction-creating fans 22 and 23 can As the motor frame-casing 4I is not fixedly rotate at higher speed to create an increased connected to the filter-cleaning nozzle which it suction in order tha-t the cleaning effectiveness is intended to drive means must be provided to of the dusting tool nozzle 28 willnot be reduced. transmit the reactive torque of the frame-casing To accomplish this result one Winding of the field 44 is divided, as clearly illustrated in Figure 20 to the nozzle. These driving means comprise a gear |32 rotatable with the frame-casing which 7, the leads ||| therefrom passing through a two meshes with a relatively large diameter gear |33 position switch 50 to which is connected the lead fixed upon a shaft |34. Shaft |34 is itself rotat ||4 leading to the brush 49 riding upon the slip ably mounted in bearings |36 and |31 supported >ring 48. The second slip ring 48 contacts a second brush 49 _to which connects the lead |I3 25 respectively in a bracket |38 and in the rear Iwall of the housing |26. At its rearward end shaft to the opposite side of the field 44. The stator |34 carries a second gear |39 which meshes with carried switch 58 includes a spring-biased actu a final gear | 4| iixedly secured to the outer sur ating element I|_2 normally held in the full line face of the cup |26 on the nozzle 66. Through position illustrated in Figure 7 in which the after the container is replaced and the machine is . entire motor ñeld is energized. Element I I2 is 30 the gear train described rotation of the frame casing 4| will be transmitted at greatly reduced positioned by means of a fixed abutment IIS so located below the motor as to contact the element |I2 when the stator is held locked. Uponthe nozzle being released by the movement of the lock lever 96, however. the motor stator begins to rotate and switch element ||2 moves from the abutment IIB and immediately thereafter iiies into its opposite position shown in dotted lines in Figure '7. In this second position part of the field winding is cut out and the motor rotates 40 at increased speed as do the fans 22 and 23. At the end of the filter-cleaning operation the stator again takes its original fixed position as but one stop pin 8l is present upon the gear 11. In this position the abutment IIB again returns 45 the switch to its full ñeld position. Referring now to Figure 8 a second preferred embodiment of the invention is illustrated which speed to the nozzle with a r'esulting increase in the reaction torque on the nozzle. The speed-controlling means described in con nection with the first embodiment comprising the escapement 85|> and its drive means are as illus trated in the first embodiment. Likewise the electrical control for this second embodiment and the actuation of the butteriiy valve 14 remain unchanged. The operation of the second embodiment of the invention is believed to be clear, lit being neces sary to point out only that rather than rotating ?lxedly with the motor frame-casing 4| the nozzle 66 rotates at a reduced speed being connected to the frame-casing through the reduction gearing described. The fixed connection of the frame casing and the nozzle of the first embodiment is replaced by the presence of a housing |26upon is distinguished from the ñrst embodiment pri marily in that gearing has been provided between 50 which both the frame-casing 4| and the nozzle 66 are rotatably mounted. the motor stator and particularly the frame casing 4| `mand the filter-»cleaning nozzle 66 in order to increase the reaction torque acting upon the nozzle. To accomplish this result certain structural changes have been embodied which will be described. it being understood that in other respects the construction is like in the ñrst described embodiment. In the second embodiment of the invention the motor frame-casing 4| is provided at its forward I claim: ` 1. In a suction cleaner of the type having an initial dirt separator, a suction-creating fan unit to draw air into and through said initial sepa rator, and a final dirt separator to receive air ex hausted from said fan unit; a motor to drive said fan unit including a plurality of individually ro tatable electric-current-carrying parts, one of said rotatable parts being connected to said fan end with a forward wall |2I which carries an 60 unit to actuate same, and cleaning means for said final dirt separator connected to a second ro insulating block |22 in which the ñeld brushes tatable part of said motor- and actuated thereby. Ml4 are mounted. The two speed swìtch'äß is 2. In a suction cleaner of the type having an also mounted on the motor wall |2I. At its initial dirt separator, a suction-creating fan unit center wall I2| -is provided with an axially 65 to draw air into and through said initial sepa extending sleeve portion which rides upon a rator, and a iinal dirt separator to receive'air bearing |23 carried by a projecting' sleeve |24 on exhausted from said fan unit. a motor to drive the casing of bearing 38 in wall I3 and in which said fan unit including a rotor and a stator, said motor shaft 24 rotates. .The motor stator does rotor being connected to said 'fan unit in driving not rotate at a very high rate of speed and 70 relationship, means mounting said stator for ro inexpensive bearing mountings are suitable. tation, and a cleaning element movable with re In the first embodiment the rearward end of the motor frame-casing `4| was >fixed to the rof tatable nozzle 66 but in the' present embodiment an enclosing iixed casing |26 is provided which said stator and driven thereby. spect to said final separator and connected to - 3. In a suction cleaner'of the type having an initial dirt separator, a, suction-creating fan unit 2,403,60ß to draw air into and through said initial sepa rator, and a ñnal dirt separator to receive air exhausted from said fan unit and including an lair permeable iilter element; a motor to drive said fan unit including a rotor and a stator, said rotor being connected to said fan unit in driving relationship, means mounting said stator for ro tation, releasable means normally- retaining said stator against rotation, and a ñlter-cleaning noz zle connected to said-initial separator and driven 10 ' by said stator and movable relative to said ñlter to remove foreign material therefrom. motor to drive said fan unit including a rotor connected directly thereto and a' stator, means rotatably mounting said stator, a ñlter~cleaning nozzle fixed to lsaid stator and rotatable there with, means to control the speed of rotation of said stator and nozzle, and means including pres sure-operated means exposed to the air pressure acting on said filter to release and lock said sta tor and nozzle. n -~ 7. In a suction cleaner of the type having an initial dirt separator, a suction-'creating fan unit to draw air into and through said initial separa tor, and a ñnal dirt separator to receive air ex hausted from said fan unit and including an air permeable filter element; a motor to drive said » 4. In a suction cleaner of the type having an initial dirt separator, a suction-creating fan unit to draw air into and through said initial sepa rator, and'a ñnal dirt separator to receive air ex hausted from said fan unit and including an air fan unit including a rotor and a stator, said- ro- 1 tor being connected to said fan unit in driving permeable filter elementça motor to drive said „ relationship, means mounting said stator for ro fan unit including a current-carrying rotor and tation, a älter-cleaning nozzle, means mount a current-carrying stator, said rotor being con- ` ing said nozzle for rotation relative to said ñlter, nected to said fan unit in driving relationship, Y speed-reducing gear means connecting said sta means mounting said stator for rotation, pres-` tor to said nozzle, means to restrain rotation of sure-operated means controlled bythe pressure in said stator and said nozzle, pressure-operated said final separator to lock said stator against ro means exposed to the pressure acting on said ñl tation and adapted to release said stator for rota~ 25 ter controlling -said last-mentioned means and tion in the presence of a predetermined pressure adapted to actuate same to release said stator in said final separator, a illter-cleaning nozzle, and nozzle in the »presence of a predetermined movably mounted with respect to said ñlter and pressure acting on said ñlter, and air-conducting connected to said stator to be actuated thereby, means to convey air and collected foreign ma and 'means controlled by said pressure-operated terial from said nozzle to said initialseparator. means to connect said nozzle to said initial sepa >8. In a suction -cleaner of the type having an rator. initial dirt separator, a suction-creating fan unit 5. In a suction cleaner of the type having an connected to said initialseparator to draw air initial dirt separator, a suction-creating fan unit thereinto' and to exhaust it therefrom, and a iinal to draw air into and through said initial separa 35 dirt separator to receive air exhausted from said tor, and a iinal dirt separator to receive air ex fan unit; a two speed motor includingY a rotor hausted from said fan unit and including an air and a stator, said rotor being directly connected permeable ñlter element; a motor to drive said to said fan unit to drive same, means rotatably mounting said stator, a älter-cleaning nozzle con nected to said stator and _driven thereby relative to saidñnal dirt separator to collect foreign ma terial therefrom, air-conducting means connect ing said nozzle to said >initial separator, means fan unit including a current-carrying rotor and a current-carrying stator, said rotor being con nected to said fan unit in driving relationship, means mounting said stator for rotation, a iilter cleaning nozzle ñxedly mounted on said stator and rotatable therewith and over said filter ele ment, and air-conducting means connecting said nozzle to said initial dirt separator. 6. In a suction cleaner of the type having an initial dirt separator, a suction-creating fan unit to draw air into and through said initial'separa tor, and a final dirt separator to receive air ex hausted from said fan unit and including a cylin drical air permeable filter arranged concentrical ly with respect to the axis of said fan unit; a normally locking said stator against rotation, ‘ pressure-responsive means controlled by the pres 50 sure acting on said final separator adapted to release said locking means upon a predetermined pressure existing in said iinal separator, and means to increase the speed of rotation of said motor upon the actuation oi' said pressure-respon sive means.