Vacuum cleaner with adjustable nozzle shield

Abstract: A vacuum cleaner (10) has a nozzle (14) with an opening (12) and a vacuum pump connected to draw dirt laden air into the opening from exteriorly of said vacuum cleaner. A shield (30) is movably mounted to the vacuum cleaner to have a first posi­ tion at which a first part of the opening (12) is blocked from passing air and a second position at which a second part of the opening (12) is blocked from passing air. The first part of the opening (12) may be downwardly directed and the second part may be forwardly directed. The shield (30) may be pivotally mounted to the nozzle (14).

Description: This invention relates to an improvement in vacuum cleaners, and is especially directed to features useful in portable domestic vacuum cleaners. It is of course apparent that the invention is also applicable to other types of vacuum cleaners. While many types of vacuum cleaners are available for efficiently and easily cleaning horizontal undersurfaces, conventional devices are not readily adaptable to the cleaning of vertical surfaces. Thus, for example, in order to clean the risers of carpeted stairs with most conventional machines, it is necessary for the operator to physically rotate the entire machine and suspend it while urging it horizontally against the riser. In a solution to this problem suggested in U.S. Patent No. 4,397,060, the nozzle is pivotally mounted to the hand part of the machine, so that the operator may hold the handle in the normal position while cleaning a riser. This arrangement, however, requires a pivotal interconnection between major elements of the device in order to effect the rotation of the entire nozzle. A further known device allowing cleaning of both horizontal and vertical surfaces is described in DD-A1-223069, which discloses a vacuum cleaner having a nozzle comprising a drum within which is located a rotary element which can be located to cover any one of four differnetly orientated openings. The present invention is therefore directed to the provision of a vacuum cleaner that overcomes or at least partially alleviates the above disadvantages of known machines. The present invention provides a vacuum cleaner having a nozzle with an opening, a vacuum pump connected to draw dirt laden air into said nozzle via said opening from exteriorly of said vacuum cleaner, a shield for said nozzle, means for movably mounting said shield to have a first position at which a first part of said opening is blocked from passing air and a second position at which a second part of said opening is blocked from passing air, said second part being different from said first part, characterised in that a brush roller is mounted within said nozzle adjacent said opening for rotation about a given axis with an arcuate portion of the surface of said brush roller protruding from said opening, means are provided for rotating said brush roller, and in that the means for movably mounting said shield are arranged to mount said shield on the exterior of said nozzle, said shield covering a portion of the protruding arcuate portion of said brush roller when the shield is in either of said first and second positions. The two parts of the opening advantageously face different directions, with respect to the machine. For example, the first part of the opening may face downwardly when the machine is held in the normal position, with the second part of the opening facing forwardly to enable the cleaning of a vertical surface forwardly of the machine. Advantageously the shield is pivotally mounted to the vacuum cleaner. Preferably, the brush roller is mounted for rotation about a first axis extending in a predetermined plane, and the vacuum cleaner further has a motor having a drive shaft extending along a second axis, the second axis extending perpendicular to and intersecting said first plane, the motor shaft having a pulley, and a belt coupling said pulley and said brush roll for rotating said brush roll, and wherein said pulley has a conical longitudinal cross section and is longitudinally spaced from said first plane. The nozzle opening may be defined between opposed edges spaced in the circumferential direction of said brush roller to expose a predetermined arc of the circumferential surface of said brush roller. According to a further embodiment the vacuum cleaner is portable and further comprises a housing with said opening provided in said housing and defining the nozzle for receiving dirt laden air, a motor mounted in said housing and having a shaft with first and second ends at opposite ends of said motor with the means for rotating said brush roller comprising a pulley on said first end of said shaft and a belt extending between siad first end and said brush roller, a dirt receptacle removably affixed to said housing and having an open end, a channel in said housing for collecting dirt laden air from said nozzle and passing said air through the open end of said dirt receptacle, a filter means in said dirt receptacle for passing said dirt-laden air therethrough, and said motor having a fan rotatably mounted on said second end of said motor shaft. An embodiment of the present invention will now be described by way of example only with reference to the accompanying drawings, wherein: FIG. 1 is a ongitduinal sectional view of the vacuum clearner with adjustable nozzle shield constructed in accordance witht he present invention; FIG. 2 is an exploded view of the beater bar assembly and a drive belt having a conical longitudinal cross-section and a housign for said assembly; FIG. 3 is a side elevational view of the nozzle shield with the operating lever disposed generally horizontally whereby the brush beater bar projects through an opening for cleaning a horizontal surface. Fig. 4 is a side elevational view similar to that shown in Fig. 3 wherein the brush beater bar projects through an opening for cleaning a vertical surface. Fig. 5 is a sectional view of the nozzle shield as seen in Fig. 3. Fig. 6 is a sectional view of the nozzle shield as seen in Fig. 4. Fig. 7 is an exploded view in both front elevation and side elevation of the assembly of the beater-brush, cover and belt of the invention. Fig. 8 is a sectional view of the removable dirt receptacle of the present vacuum cleaner with adjustable nozzle shield. Fig. 9 is a side elevation of the dirt receptacle shown in Fig. 8. Fig. 10 is an elevational view of the open end of the dirt receptacle shown in Figs. 8 and 9 and Fig. 11 is an elevational view of the closed end of the dirt receptacle showing the latch therein. Fig. 1 shows the entire assembly in section constituting a vacuum cleaner having a vacuum pump referred to generally by the reference numeral 10 connected in the device whereby dirt laden air is drawn into the opening 12 of the nozzle 14 in the housing 15. The vacuum pump includes a motor 16 and motor-driven fan 18. A brush roll 20 is positioned within the opening 12 and is rotatably driven by a pulley 22 having a conical longitudinal cross-section belt 24 passing over the pulley as well as the conical-shaped shaft 26. The belt 24 can be replaced by means of opening the door 25 in the front of the housing 15 of the vacuum cleaner in order to expose the belt, as required. The brush roll 20 is provided with a swivelling brush roll cover or shield 30. The air flow or dirt path is shown in channel 32 as indicated by arrows in Fig. 1. It will be noted that the dirt path communicates with the open end 34 of dirt receptacle 36. The dirt path air flow also continues through a motor filter 38, of the reusable type, with the dirt and debris being trapped in the filter while the relatively clean air passes through fan 18 and motor 16 and out of vacuum cleaner through side grilles (not shown) in the housing section 42. The dirt container 36 can be separated from the main housing by means of a latch release button 64. Referring to Figs. 2 and 7, the brush roll assembly and accompanying structure is shown in exploded views in which the brush roll 20 is provided with end bearings 46. A subcover or sole plate 48 is provided with cut-out semi-circular parts 51 which fit over the brush roll 20 and bearings 46. The shield 30 is adapted for moving from horizontal to vertical position, and vice versa, by means of a lever 50 shown in Figs. 3-6. The lever 50 has a downward post 54 having opposed fingers 56 which are held in grooves or indentations 58 in the inside surfaces of the shield 30. The shield is mounted to pivot or swivel from a horizontal to a vertical position, and vice versa, as seen in Figs. 3-6. As seen in Fig. 7 the lever 50 is shown in dotted lines affixed to an inside wall of shield 30. The brush roll 20 and sole plate 48 is also shown an exploded view The bearings 46 are shown both attached and detached from the brush roll 20. The front of the housing 15 is shown having a door 25, and behind the door, a conical drive shaft 26 for the belt 24. The door 25 in the front of the housing 15 is shown broken away revealing the conical drive shaft 26. Referring to Fig. 1, the present vacuum device is provided with an AC supply cord 54 as well as an on-off switch 56. It should be noted that it is within the scope of the present invention to utilize a D.C. battery for providing power to the present vacuuming device. The device is further provided with a handle 58 having finger openings 51 for ease of use in vacuuming, as well as transporting the device. As seen in Figs. 5 and 6 the lever 50 is provided with lateral projections, the ends 55 of which are held in grooves 58 of the shield 30. The lever 50 is fabricated of a slightly bendable material, such as a themoplastic, so that it may be pulled in a direction away from the shield as shown by the arrow A, and rotated in the direction of the arrow B, so that the curved end 59 on the post 54 of the lever 50 can clear the obstruction of the circular bearings 61 so that the shield 30 can be rotated, as shown in Figs. 5 and 6. However, since the lever 50 is somewhat resilient, and after it is released from its pulled out position, it will return to its rest position in which post 54 is latched to circular projection 47 on the outer surface of bearing plate 46a and the shield is prevented from rotating. Referring now to Figs. 8-11 in which is shown the dust receptacle or container 36 having an open end 34 which, as stated hereinbefore communicates with the dirt path 32. The closed rear end 37 of the receptacle is provided with an upwardly directed projection 62 which is engaged by a catch 64 forming a latching arrangement for the dust receptacle 36, as clearly seen in Fig. 1. The receptacle 36 can be fabricated of semi-transparent material so that amount of dirt, dust and debris picked up by the vacuum and deposited in the receptacle, at any given time, can be observed by the user. The preferred embodiment of the present invention can provide a light-weight, portable, vacuum cleaner having an adjustable shield which can be pivoted from one position to another whereby the nozzle opening is changed in orientation in order to vacuum both stair steps and risers, as required. The preferred embodiment of the present invention can also provide a hand-held vacuum cleaner having means for changing the flow path of dirt-laden air therein and in which a closable opening is present for providing easy access to the drive belt for replacement purposes. The preferred embodiment of the present invention can also provide a hand-held vacuum cleaner which is reliably effective for the purposes intended. While the invention has been disclosed with reference to a single embodiment thereof, it will be apparent that many variations may be made therein, and it is therefore intended in the following claims to cover each such variation and modification as falls within the scope of the invention.

Claims: A vacuum cleaner (10) having a nozzle (14) with an opening (12), a vacuum pump connected to draw dirt laden air into said nozzle (14) via said opening (12) from exteriorly of said vacuum cleaner, a shield (30) for said nozzle, means for movably mounting said shield (30) to have a first position at which a first part of said opening (12) is blocked from passing air and a second position at which a second part of said opening (12) is blocked from passing air, said second part being different from said first part, characterised in that a brush roller (20) is mounted within said nozzle (14) adjacent said opening (12) for rotation about a given axis with an arcuate portion of the surface of said brush roller (20) protruding from said opening, means are provided for rotating said brush roller, and in that the means for movably mounting said shield are arranged to mount said shield on the exterior of said nozzle, said shield (30) covering a portion of the protruding arcuate portion of said brush roller (20) when the shield (30) is in either of said first and second positions. A vacuum cleaner according to claim 1 wherein said shield (30) is pivotally mounted to said vacuum cleaner. A vacuum cleaner according to claim 1 or 2 wherein the brush roller is mounted for rotation about a first axis extending in a predetermined plane, and further comprising a motor having a drive shaft (26) extending along a second axis, the second axis extending perpendicular to and intersecting said first plane, the motor shaft (26) having a pulley (22), and a belt (24) coupling said pulley (22) and said brush roll (20) for rotating said brush roll (20), and wherein said pulley (22) has a conical longitudinal cross section and is longitudinally spaced from said first plane. A vacuum cleaner according to claims 1, 2 or 3 wherein said nozzle opening (12) if defined by opposed edges spaced in the circumferential direction of said brush roller (20) to expose a predetermined arc of the circumferential surface of said brush roller (20). A vacuum cleaner according to any preceding claim further comprising latch means for releasably holding said shield at said first and second positions. A vacuum cleaner according to claim 4 or 5 which is a portable vacuum cleaner, further comprising a housing (15) with said opening provided in said housing (15) and defining the nozzle (14) for receiving dirt laden air, a motor mounted in said housing and having a shaft (26) with first and second ends at opposite ends of said motor with the means for rotating said brush roller comprising a pulley (22) on said first end of said shaft (26) and a belt (24) extending between siad first end and said brush roller, a dirt receptacle (36) removably affixed to said housing (15) and having an open end, a channel (32) in said housing (15) for collecting dirt laden air from said nozzle (14) and passing said air through the open end of said dirt receptacle (36), a filter means (38) in said dirt receptacle for passing said dirt-laden air therethrough, and said motor (16) having a fan (18) rotatably mounted on said second end of said motor shaft.

Inventors: BOLBOCK SCOTT, FERRARI MARCO, GENGE KEVIN, BOLBOCK, SCOTT, FERRARI, MARCO, GENGE, KEVIN
Applicants: WHITE CONSOLIDATED IND INC, WHITE CONSOLIDATED INDUSTRIES, INC.
Application year: 1990
Main classification: A47L9
IPC codes: A47L9, A47L5