Патент USA US2112372код для вставки
March 29, 1938. 2,112,372 G. E. LOFGREN ' VACUUM CLEANER 2 Sheets-Sheet l ‘Filed June 25, 1956 32 v i3 - _ 1 vENTbR. ' March 29, 1938. _ e. E. LQFGREN 2,112,372 VACUUM CLEANER Filed June 25, 1956, 70. 6% 1N VENTOR. M WW KA» Adi/9% / 1%‘; ATTORNEY. I Patented Mar. 29, 1938 2,112,312 _ UNITED ‘STATES PATE'NT OFFICE 2,112,872 VACUUM CLEANER Gustaf Einar Loigren, Riverside, Com, assignor to Electrolux Corporation, Dover, Del, a cor poration of Delaware Application June 25, 1936, Serial No. 87,125. 10 Claims. (01. 183-37) ~ My invention relates to vacuum cleaners and " ‘the device shown in Fig. 3, but showing certain more particularly to vacuum cleaners of the en closed bag type. In cleaners of this. type, it isv parts in different positions; and ‘ Fig. 8 is a view similar to Fig. 4 but showing ‘common to provide a casing within which are certain parts in a diiferent position. I disposed a motor-fan unit and a dust bag or Referring more particularly to Figs. 1 and 2, 5 other dust separating member. In order to reference character Iii designates the main por clean the dust bag of accumulated dirt, it is tion of a vacuum cleaner casing, preferably in necessary to remove it. and hence a removable cluding a rounded upper stamping H and a sub closure member is.provided for this purpose. V stantially ?at lower stamping‘l 2 which are joined 10 It is also convenient to arrange the closure-mem together in air tight relationship along the seam ber so that it clamps the vdust bag in place. l3. If desired, this seam may be covered by' a One of the objects of my invention is to provide ‘ rubber strip M. which serves as a bumper to a new and improved means for removably secur ing a closure member in place. In accordance 15 with my invention the closure member may be removed by a simple natural movement of a single handle member which movement ?rst re leases the closure member from engagement with the rest of the casing and thereafter removes 20 the closure member. My invention'further in cludes an automatic operating toggle mechanism which looks the closure member in engagement with the casing upon movement of the single handle member in the‘proper direction. , It is also convenient in a cleaner of this type to attach a suction hose to the closure member. Inasmuch as-the hose is used to pull the cleaner over the surface on which it rests, this force must be transmitted from the closure member, to ,/ prevent marring of furniture or the like with which the device accidentally may come in con tact. Lower stamping I2 is preferably formed with‘runners i 5 and I6 for supporting the unit on a surface. ’ ‘ Casing I0 is reenforced and divided into three compartments by meansof bulkheads I1 and Ill. The space I 9 between these bulkheads may be 20 v termed a motor-fan compartment and access thereto may be had by means of a removable cover member 20 secured in‘ place in an opening formed in the bottom stamping. Suspended be’ tween the bulkheads is a preferably cylindrical 25 case 2| within which is mounted the motor-fan unit including an electric motor 22 and a centrif ugal fan 23. _, - The space My between bulkhead l8 and the adjacent end of the casing may be’ termed a 30 filter compartment and encloses a suitable ?lter 30 the casing through’ the means employed to se cure the former to the'latterh Hence, another . object of my invention is to provide securing ~ element 25. This end of the casing is "provided means so arranged that this force has no tend ency to cause release of the closure member 35 from the casing. ' ' > - I Further objects and advantages of my inven tion will be apparent from the following descrip tion- considered in connection withv the accom panying drawings forming part of this speci?ca 40 tion, and of which»; Fig. 1 is a side view,'partially in cross-section, of’ a. preferred embodiment ‘of my invention; ‘ Flgl. 2is an end view. ofthe device ‘shown in Fig. 45 ; - \ ' . sure member 26. v Member. 26 is provided with an exhaust opening 21 acrosswhich extends a plu rality of vanes 28 for the purpose‘ of directing air ?owing therethrough' in an upward direction. _ The space 29 between bulkheadv I‘! and the ad-' jacent end 'of casing~ l0 may be’ termed a dust ‘ bag compartment. This end of the ‘casing is provided-with a preferably, though not neces , sarily, ‘circular opening bounded by a ?anged ring 30 which provides an outwardly facing seat view of the portion of the device shown'in Fig. v 3| fora dust bag 'ring 32. Ring 32 is formed with 1 which embodies my invention, and is taken on an outwardly extending ?ange 33 which carries the line 3-3 of Fig. 2; g " , v I n . ‘Fig. 3 is a cross-sectional view of an enlarged "Fig. 4 is a cross-sectional view taken on the line Fig. 5 is a cross-sectional view taken on the "line I—5 ofFlg.4; " n .x a packing ring 34 of rubber or other suitable com pressible material. . A dust bag 35 of cloth which -is pervious with respect to air but impervious with respect to dust has its open end secured to ring 32.v Fig. 6 is a .cross sectional view taken on the lines H of Figs. 4 and 5; 55 with an opening su?‘lciently large topermit the insertion and removal of the ?lter element, which opening is normally closed by means of a clo- 35 ' ‘ °Fig. '! is a cross-sectional view of a portion of to ' I, A closure member designated generally by "et erence character 40 is adapted to close the ope‘.. ing formed by ring 30. The closure member in 56 2,112,879 2 cludes a substantially ?at central plate 4| ?anged through and is discharged by the fan through at its periphery so as to be complementary to ?lter element 25 and ?nally passes to_ the atmos phere through exhaust opening 21. ?anged ring 36. Plate 4| is formed with an in After the vacuum cleaner has been operated for let'opening 42 which is adapted to receive and ‘ retain one end of a ?exible'hose 43. To .the some time, su?icient dust has accumulated within other end of the hose may be connected a suction the dust bag 35 to require the cleaning thereof. This is accomplished by removing closure member nozzle 44 by means of a hollowrigid handle 45. Preferably integral with plate 4| is a pair of spaced members 46 between which is pivotally mounted/a handle 41 by means of a pivoting pin 46, which may be done by grasping the part 49 of handle 41 and rotating it in a counter-clock 48. Handle 41 includes a preferably curved hand grasped portion 49 and a substantially circular portion 56. . A double rack 5| ‘is slidably mounted on the outer surface of plate 4| and preferably slides on tracks 52 which are raised slightly above the surface of the plate. These tracks may be ma chined so as to provide a smooth sliding surface. Rack 5| is retained against tracks 52 by means oi headed pins 56 which extend through slots 51 formed in the arms 58 of the rack. Rack 5| is provided with a pair-of ears 53 dis posed on either side of circular portion 50 of the handle and between portion 56 and members 46. 25 Ears 53 are provided with slots 54 which are en wise direction to the position shown in Fig. 7. 10 This movement causes pin 55 attached to the handle to move in an-arc generally upwardly. Rack 5| is hence caused to slide upwardly in a straight line along tracks 52, the pin and slot con nection between the rack and the handle per 15 mitting arcuate movement of the handle to cause straight line movement of the rack. This move ment of the rack causes gear segments 60 to pivot in opposite directions to the position shown in Fig. 8. In this position the latch member 62 has 20 been pivoted out of recess 65 and out of engage ment with the springs 66 contained therein. Con sequently, the closure member is no longer se cured to the rest of the casing and it may be removed therefrom by movinghandle member 25 41 away from the casing. It will be seen that gaged by a pin 55 rigidly secured to central por this latter movement is a continuation of, and in tion 56 and projecting from. both sides thereof. Ann 56 are formed with gear teeth 59 which substantially the same direction as, the move ment of the handle which releases the latch mem engage similar gear teeth formed on gear seg- bers 62. Consequently, as far as the operator is 30 merits 66, which are pivotally secured to plate 4| concerned, both the releasing and removal of the by means of headed pins 6|. Integral with gear segments 60 are latch members 62. Ring 36 is cover member is effected by merely grasping the formed with box-like recesses 65 on opposite sides , handle and pulling it in a direction away from the of the ring and in alignment with the pivots 6| of _ cleaner. The dust bag may now be removed from the 35 the cover member. Retained within each recess 65 is a spring member 66 having the shape clearly shown in Fig. 6. That is to say, spring member 66 is made of a ?at piece of spring material and is formed so as to have a substantial ?at central portion 61 and curved end portions 68. Further - more, these spring-members are so formed that the ?at central portion 61 is inclined slightly to the plane of movement of the latches 62, as is likewise clear from Fig. 6. Plate 4| is formed 1 with ?anges 69 adapted to receive the box-like portions of ring 36 which form the recess 65, thus assuring that the cover member is properly lo cated with respect to the ring 36. The outer surface of plate 4| is also provided with a projecting arm 16 to which is pivotally secured at ‘H one arm 12 of the toggle mechanism. The'other arm 13 of this mechanism is pivotally connected at 14 to a projection formed on central portion 56 of the handle. A spring 15 surrounds arms 12 and 13 and tends to lengthen the toggle. A stamping ‘I6 is preferably secured to plate 4| for the purpose of concealing the mechanism car ried on the outer surface of the plate, and the shape of stamping 16 is preferably such as to car ry out and blend with the shape .of the main part It of the vacuum cleaner casing. Stamping compartment 29 and emptied. It, is~then re placed in the compartment and. the cover mem ber put back. In order to engage the cover mem ber with the rest of the casing, it is placed on the ring 36 with the ?anges 66 embracing the box-like 40 structures 65. Thereafter, the handle 41 is turned or rotated in a clock-wise direction. This causes the rack to move downwardly and to ro tate the gear segments 60 so as to project the latches 62 into engagement with the spring 66 45 contained in the recesses 65. As will be seen from Fig. 6, as the latch 62 moves toward the right, as viewed in this ?gure, it deforms the spring 66, by virtue of the inclination of the ?at . portion 61 of the spring. The stress thus pro 50 duced in the springs tends to force the plate 4| tightly against the packing 64 on the dust bag ring which is disposed between-the plate and the ring 30. This results in the formation of anair 7 55 tight seal around the opening. The toggle mechanism assures that the latch member 62 will remain in engagement with the springs66. In- the position shown in Fig. 3, the‘ spring 15 of the toggle tends to rotate the han dle member in a clock-wise, direction,v thus tend 60 ing to force the latch member 62 further to the 16 may be secured to plate 4| by means of a screw 11 which engages arm 10 and by means of a threaded ring 18 which may be screwed on to the outer threaded end of inlet 42 so as to clamp a right, as viewed in Fig. 6, against spring 66. Likewise, when the handle is in the position shown in Fig. '7, the spring 16 of the toggle mech ?ange 19 formed on the stamping. The operation of the above described device is clockwise direction, thus assuring that itwill re main in ‘this position when it is picked up by the operator and until the closure member is in place and the operator intentionally exerts su?i as follows:— ' With the unit assembled as shown in Fig. 1 ro tation of the fan 23 by the motor 22 causes air to be drawn in through nozzle 44, handle 45, hose 43 and inlet 42 to the interior of dust bag 35. As the nozzle is passed over a dusty surface dust is _ ' entrained in this air. This dust is deposited 5 within the dust bag, while the air passes there anism tends to rotate the handle in a counter cient force on the handle to overcome the resist ance of the spring 15. i 65 70 When removing the closure member 4011515 Y not necessary to detach the hose 43 therefrom, inasmuch as the presence of the hose has no effect whatsoever. upon the releasing or attach 75 air'aa'ra ‘ ing voi’ the closure member. .When' in .use, the 3. vacuum cleaner, a member pivotally mounted on . vacuum cleaner unit is moved over the surface on said closure member and rotatable to‘ engage said which it is supported by the operator pulling on - " casing, the plane of rotation of the pivoted mem the hose 43. The force resulting therefrom is ber being substantially normal to the direction transmitted to the closure member and from of the force applied by said hose,’ whereby force there to the casing through the latching'llmech for moving thev vacuum cleaner is transmitted to anism.‘ It is important that this ‘force,’ which the casing fromthe closure member, and a han is applied in a direction tending to open the seal ‘ dle movably secured to said closure-member and formed by packing 34, shall not have .this eiiect. movable in substantially the same direction as the 10 Leakageat this point would result in a substan direction of said force to rotate said pivoted tial reduction in the emciency of the'vacuum member out of engagement with said casing. ‘ cleaner. It will be notedthat the direction of 4. In a vacuum cleaner of the kind having a this force is at right angles to the plane in which unit pulled on the rug by a hose and including the latch members 62 are,rotated to release them. 15 Consequently, this force has no tendency what soever to turn the latch members, and hence does not tend to loosen or release the closure member - from the casing. It will be noted that the engagement between 20 the latch .members 62 carried by the closure member 40 and the spring 66 takes place within . the casing proper, inasmuch as these springs are ‘retained within'recess formed in ring 30 which is 10 a- casing having a dust separator opening, a dust separator ring seating in said opening, a cover, means for compressing the dust separator‘ ring I between the cover and the casing, a handle on said cover mounted to move toward and. away from said dust separator opening, and means connecting said handle with said compressing 20 means to compress the dust separator ring when the handle is moved toward the dust separator opening and to release the, compressing means part of ‘the casing. This adds greatly to the _ on moving the handle away from the dust sep arator opening. 25 appearance oi’ the vacuum cleaner inasmuch as all fastening mechanism is within the casing and ‘hence out of sight. . Although the present inven tion has been described in connection with the 5'. In a vacuum cleaner of the kind having a unit pulled on the rug by a hose and including a.casing having ,a dust separator opening, a ' closure for the dust bag opening, it could be used 30 as well for securing the member 26 to the main " dust separator ring seatingv in said opening, a cover, means for compressing the dust separator portion ill of the casing. While I have shown and described one more or less speci?c embodiment of my invention, this ring between the cover and the casing, said cover having'a hose receiving aperture, a hose adapted to communicate with the interior of said casing ' has been done for purposes of illustration only 35 as required by the patent statutes, and does not \ ’ through said aperture, a handle on said cover mounted to move toward and away from said constitute a limitation vof‘ my invention, the scope of which is-to be determined by the appended claims viewed in the light oi’ the prior art. ~ , What I claim is:— 40 ‘ 1. In a vacuum cleaner, a casing formed with an opening, a closure member for said opening, a member connected to said closure member for exerting a force thereon to move said vacuum ‘cleaner, means movably mounted on said closure 45 member‘and movable to engage said casing to se cure said closure member to said casing and being dust separator opening, and means connecting said handle with said compressing means to compress the dust separator ring when the han dle is moved toward the, dust separator opening and to release the ‘compressing means on movingv 40 the handle away from the dust separator open ing, said compressing means also serving to transmit pull between the hose and the casing. 6. In a vacuum cleaner of the kind having a unit pulled on a rug by a hose and including a 45 casing having a dust bag opening, a dust bag ring constructed and arranged for transmitting force ‘ seating in said opening, a cover having an air from the closure member to the casing for mov ing the vacuum cleaner, the plane of movement 50 of said means being substantially at right vangles to the direction of application of said force, and a handle mounted ‘on said closure member for‘ . I an opening,_a closure memberior said opening provided with an air'passage, a ?exible hose adapted to be connected to said-member so as to communicate with said passage and adapted to exert a force‘ on said member 'forvmoving said 60 vacuum cleaner, a member pivotally mounted on said closure member and rotatable to engage said casing toremovably secure said closure member to said casing, the plane of rotation of the -piv-' otal member being substantially normal to the 65 direction of the force applied by said hose, where by force for moving the vacuum cleaner is trans mitted to the casing from the closure member, and a handle mounted on said closure member '70 horizontally to and, from said opening, means for securing said cover to said casing and for compressing the dust bag ringfbetween the cover _ and the casing, a handle on said cover pivoted 2. In a vacuum cleaner, a casing formed with?-i... .on a horizontal axis-‘and mechanism connecting moving said means. 55 passage and adapted to have a hose connected thereto, said cover being movable substantially for rotating said means. i .' . - ' 3 In avacuum cleaner, a casing formed with said handle with said securing and compressing means to release said means on movement of the handle away from the cover, whereby a conti~v nuity of movement in the same general direction releases the cover and removes it from the cas ing. ‘ > 60 . 7. In a vacuum cleaner oi’ the kind having a unit pulled on a rug by a hoseand including a casing having a generally vertical dust bag open- _ ing, a dust bag ring seating in said opening, ‘ a cover having a horizontal air passage, a hose connectible to said air passage, and means for sealing the dust bag ring betweenv the cover and the casing, a handle on said cover pivoted on a horizontal axis, and mechanism connecting the handle and the sealing means to cause seal an- opening, a closure member for said opening ing on‘movement oi’ the handle toward the cover provided with an air passage, va ?exible hoses as a continuing movement after bringing the - adapted to be connected to said member so as to \ communicate with said ‘passage and adapted’ we to exert a force on said member for/moving said <~ cover into position. ' _ i 8. In ‘a vacuum ‘cleaner of the kind having a unit pulled on the ?oor by a hose and including 2,112,879 4 a' casing having a dust bag opening, a dust bag having a rubber ring seating in said opening and a cover seating against said dust bag ring, means adapted to exert a pull on said cover, pull trans mitting and ring compressing ?ngers movably mounted on said cover, said casing having re ceiving means for said?ngers, a handle mounted on said cover, and mechanism connecting said handle and ?ngers. ‘ 9. In a vacuum cleaner, a body including a 10 ring bounding a dust bag opening, said ring having a seat for a dust bag in a given plane, said ring having projections extending from said plane with respect to the body providing recesses, a cover having ?ngers adapted to enter said re cesses, a dust bag ring ?tting said seat, said cov er having an annular surface for contacting the dust bag ring, said ?ngers being pivoted adja cent said annular surface, a hose for pulling the body, means to connect the hose to the cover, snap-action mechanism for moving said ?ngers into and out of said‘ recesses, and said cover pro— viding supporting surfaces for said ?ngers to transmit force between the hose and the body. 10. In a vacuum cleaner of the‘ kind having a unit pulled on the rug by a hose and including a casing having an access opening for removal of dust, a sealing ring seating in said opening, a cover, means for compressing the sealing ring 11) between the cover and the casing, a handle on said cover mounted to move toward and away from said opening, and means connecting said handle with said compressing means to compress the sealing ring when the handle is moved to ward the opening and to release the compressing means on moving the handle away from the opening. ' GUSTAF EINAR LOFGREN.