CA2053991A1 - Vacuum cleaning tool with adjustable intake air flow - Google Patents
Vacuum cleaning tool with adjustable intake air flowInfo
- Publication number
- CA2053991A1 CA2053991A1 CA002053991A CA2053991A CA2053991A1 CA 2053991 A1 CA2053991 A1 CA 2053991A1 CA 002053991 A CA002053991 A CA 002053991A CA 2053991 A CA2053991 A CA 2053991A CA 2053991 A1 CA2053991 A1 CA 2053991A1
- Authority
- CA
- Canada
- Prior art keywords
- flow opening
- opening
- cleaning tool
- vacuum cleaning
- main flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/02—Nozzles
- A47L9/04—Nozzles with driven brushes or agitators
- A47L9/0405—Driving means for the brushes or agitators
- A47L9/0416—Driving means for the brushes or agitators driven by fluid pressure, e.g. by means of an air turbine
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/02—Nozzles
- A47L9/04—Nozzles with driven brushes or agitators
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/28—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
- A47L5/30—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle with driven dust-loosening tools, e.g. rotating brushes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles For Electric Vacuum Cleaners (AREA)
Abstract
Abstract of the Disclosure Vacuum cleaning tool with adjustable intake air flow. The tool has a housing, in the base of which is provided an intake opening for intake air to a vacuum cleaner. Disposed above the intake opening is a brush roller, bristles of which extend through the intake opening. The brush roller is driven by an air turbine that is driven by the intake air flow. To adjust the intensity of the intake air flow, which flows from the intake opening to the air turbine and to a connector of the vacuum cleaner via a flow opening, at least one slide mechanism is disposed in the housing for varying the passage cross-section of this flow opening.
Description
2~3~
ACUUM ~LE~NING TOOL WIT~I ADJUSTA~LE INTAKE AIR FL~W
Background of the Invention The present invention relates to a vacuum cleaning tool having a housing, in a base of which is provided a suction or intake opening for a suction or intake air flow to a vacuum cleaner, the tool also having a brush roller, bristles of which extend through the intake opening, with the brush roller being rotatably driven via an air turbine that is driven by the intake air flow, wi-th this intake air flow belng guided from the intake opening to the air turbine and to a connector of the vacuum cleaning tool via a flow opening.
When vacuum cleaning textile floor coverings and smooth floor surfaces, in order -to loosen dirt particles that adhere to the surface that is being cleaned a rotatabl~ drlven brush roller is used that is disposed in the vacuum cleaning tool, with bristles of the brush roller extending through the intake opening. To clean various textlle floor cov~rings, and to achleve an op-timum cleaning effect at maximum protectlon of the floor covering, the intensity of the suction or intake alr flow must be ad~ustable, as a conse~uence of whlch the speed of the brush roller will also be altered.
It is known to ad~ust the intake alr stream by 2~3~
altering the speed of the suction fan motor via electrical or electronic adJustment means.
However, this type of adJustment of the intake air stream is technically complicated and 0xpensive, and is -therefore used only for large, high-quali-ty vacuum cleaning apparatus.
It is also known to reduce the in-take alr flow through the intake opening of the vacuum cleaning tool vla a so-called secondary air stream. For this purpose, a manually operable adjustment device is disposed in the vacuum hose in the vicinity of the handle for opening and closing a secondary flow opening. Unfortunately, this quite slmple adJus-tment device permits only very course ad~ustment of the in-take air stream, which is often inadequate.
It is therefore an obJect of the present invention to improve a vacuum cleaning tool of the aforamentioned general type ln such a way that the intake alr stream, and hence also the speed oE the brush roller that i8 driven by the air turbine, can be easily and sensitively adJusted.
~rief Description of the Drawings This obJect, and other objects and advantages of the present invention, will appear mor~ alearly ~rom the following specification in con~unction ~3~
with the accomparlylng schematic drawings, in which:
Fig. 1 is a cross-sectivr-al view through one exempl ary embodiment of the inventive vacuurn cleaning tool at the level of a main Elow opening and a secondary flow opening, Fig. 2 is a partially bro}cen-away front view of the vacuum cleaning -tool of Fig~ 1;
Fig. 3 is an enlarged view oE the slide mechanism and control plate disposed in the vacuum cleaning tool, and in particular with the main flow opening completely open;
Fig. 4 is a view similar to Fig. 3 with the side slide mechanism lowered to reduce the passage cross-sectlon of the main flow openincJ;
Fig. 5 is a view similar to Fig~ 4, with the midd1e ~1ide mechani.sm half way lowered;
and Fig. 6 is a view slmilar to Fig. 5, 2~3~1 with the middle slide mechanlsm completely lowered.
Summary of the Invention The vacuum cleaning tool of the presant invention is characterized primarily by at least one slide mechanism that ~s disposed ~n the housing for varying a passage cross-section of the main flow opening and hence for adJusting the volume of the in-take air flow.
Advan-tageously, two slide mechanisms are provided for being able to ad~ust the passage cross-section of the main Elow opening; thesa two slide mechanisms are preferably coupled with ons another in an adJustment path dependent manner.
Pursuant to a further specific embodiment of the present invention, one of the slide mechanisms has two tongues that are associated with the end or side portlons of the flow opening, while the other slide mechanism is associated wlth the central portion of the flow openlng and ls disposed between the tongues of the one slide mechanism. This configuration makes it possible to leave the passage height of the main flow opening unaltered after the side slide mechanism that is provided with the tongues has been lowered, so that even large dirt particles can still ba drawn in without ~3~9~
difficulty.
~y means of the slide mechanism arrangement~
it is possible -to completely interrupt the intake air stream through the intake opening, in which connection it is advan-tageous to at the same time open a secondary flow opening through which a secondary air stream flows from an intake opening -to the air turbine, thereby maintaining the rotating drive for the brush roller.
Further specific features of the present lnvention will be descrlbed in de-tail subsequently.
Descrlption of Preferred Embodiments Referring now to the drawings in detail, the vacuum cleaning tool 1 has a housing 2 in the forward region of which is formed a brush chamber 3. Disposed in the base 6 of this brush chamber is a suction or intake openlng 19 that faces the floor surface 17 that is to be cleaned: the intake opening l9 extends over the entire width of the vacuum cleaning tool 1. Disposed in the brush chamber 3, above the intake opening 19, i9 a brush roller 4, the br:Lstles 5 of which pro~ect beyond the intake opening 19 and thuæ come into con-tact with the floor surface 17 that is to be cleaned.
The brush roller 4 is driven by an air turbine lO via a belt 7, the turbine wheel 11 of the ~3~
tu-bine is mounted in the main housing 2 in such a way as to be rotatable about a horizontal sha~t 12.
In its end or rear portion 8, which is remote from the brush chamber 3, the housing 2 of the vacuum cleaning tool 1 is provided with a pivotably mounted connector 9 via which the vacuum cleaning tool is connected to a non-illustrated vacuum cleaner.
The suction or in-take air stream of the vacuum cleaning -tool flows via the intake opening 19, which rests upon the floor surface 17 that is to be cleaned, into the brush chamber 3, and from there via a flow opening 15 into a flow channel 16, whlch conveys the in-take air stream tangentially relative to the turbine wheel 11; the intake air stream then flows off to the vacuum cleaner via the connector 9. Provided parallel to the maln flow opening 15 in the housing 2 oE the vacuum cleaning tool 1 is a secondary flow opening 38; this secondary flow opening receives outside air via a slit-like suction or intake opening 39 that is provided in the housing 2, with the air then flowing -to the connector 9 via an air inlet opening 37 and the turbine wheel 11.
To ad~us-t the volume of the intake air stream that en-ters via the intake opening 19, and hence ~ 6 --2~3~
also to adjust the speed of the air -turbine 10 -that drives the brush roller 4, a sllde mechanism arrangemen-t 41 is provided in the brush chamber 3 upstream of the main flow openlng 15. The advantage of disposing the slide mechanism arrangament 41 upstream of the maln flow opening 15 and the secondary flow opening 38 is that the slide mechanism can be pressed by the intaka air stream against the rim of the flow openings 15 and 38, -thus ensuring a tight closing-ofE without the need for additional measures.
The construction of the slide mechanism arrangement 41, which is shown in cross-section in Fig. 1, can be seen more clearly from Fig. 2. The flow opening 15 has an essen-tially square or rectangular cross-sectional conflguration and, when seen in the front view oE Fig. 2, is disposed centrally in that wall of -the housing 2 -that separates the housing from the brush chamber 3.
The cross-sec-tional conEiguration of the flow channe]. 16 corresponds to that of the main Elow opening 15.
The slide mechanism arrangement ~1 comprises an approximately U-shaped sida slide mechanism 20, the legs of which are embodi~d as tongues 21 and 22 for covering the side portions 13 and 14 of the 2 ~
main flow opening 15. The U-shaped slide mechanism, which will subsequently be designated as the side slide mechanism 20, is held in -the houslng in such a way that it can be displaced vertical].y relative to the horizontal longltudinal central axis 31 of the main flow opening 15.
Provided between the tongues 21 and 22 of the side slide mechanism 20 is a middle slide mechanism 25, which in order to close oEf the central portion 18 of the main flow opening 15 is held in the housing in such a way as to be displaceable vartically relative to the longitudinal central axis 31 of the main Elow opening 15. Via respective pins 26 and 27, the two slide rnechanisms engage in respective guide slots 28 and 29 of a control plate 30, which is mounted in the housing in such a way as to be displaceable in guide rails 33 and 3~ in the d:Lrection of the longitudinal central axis 31 of the main flow opening 15. The control plate 30 is provided with a grip rnember 35 that extends out through a slot that forms the intalce opening 39 for the secondary flow opening 38. Associated with the grip member 35 are ad~ustment mar}ss 40 that are provided on the housing.
In the open position of the main flow opening 2 ~
15 shown in Fig. 3, the two slide mechan:Lsms 20 and 25 are disposed above -the opening 15. In relat~on to -the main Elow opening 15, the middle slide mechanism 25, in its "open position", completely uncovers the main flow opening 15; at the same time, however, in the open position o the main flow opening 15 the middle slide mechanism 25 closes off the secondary flow opening 38, as shown by broken lines in Fig. 1. In this position illustrated in Fig. 3, the pin 26 of the side slide mechanism 20, and the pin 27 of -the middle slide mechanism 25, are disposed in end portions 28a and 29a of the guide slots 28 and 29 r0spectlvely.
These end portions 28a and 29a are disposed essentially parallel to the longltudinal central axls 31 oE the main flow opening 15. The vertical or heigh-t positions of the end portions 28a and 29a of the guide slots 28 and 29 determine the open positlons of the side slide mechanism 20 and the middle slide mechanism 25 illustrated in Fig. 3.
The end portion 28a of the guide slot 28 has a horizontal dimens:lon that essentially corresponds to the dlameter of the gu:lde pin 26. The other end portion 28b of the guide slot 28 is disposed parallel to the end portion 28a, but is lower by the vertical distance "u", which corresponds to the 2~3~
stroke or travel of the side slide mechanlsm 20 from its open posltion shown in Fig. 3 -to its closed position shown in Figs. ~ to 6. The two horizontal end portions 28a and 28b mer~e with one another via an inclined portion 28'.
When viewed from the top, the hori~on-tal end portion 29a of the guide slo-t 29 that is associated with the middle slide mechanism 25 has a length that corresponds appro~imately to the leng-th of the end portion 28a plus the inclined portion 28'.
When the control plate 30 is moved in the direction o~ the arrow P, the pin 27 is gulded in the horizontal end portion 29a, as a result of which the middle slide mechanism 25 remains in its open position. In con-trast, after a short ad~ustment path o~ the control plate 30, tha pin 26 o~ the slde slide mechanism 20 leaves the end portion 28a and en-ters the inclined portion 28', being shifted by the distance "u" until it reaches the lower horizontal end portion 28b, as a result o~ which the side slide mechanism 20 is displaced into i-ts closed position i:llustrated in ~ig. 4. Whereas the side slide mechanism 20 in -the closed position s}lown in Fig. 4 has thus closed off the end or side portions 13 and 14 o~ the main flow opening 15, the middle slide mechanism 25 maintains i-ts open 2~3~
position, in which it close.s off tha secondary flow opening 38. The passage cross-section of the main flow opening 15 is reduced by the side portions 13 and 1~ that are covered by the tongues 21 and 22 of the side slide mechanism 20; in conformity with the reduced intake air stream, the drive speed of the air turbine 10 is reduced, so that the brush roller 4 rotates mor~ slowly. The height of the main flow opening 15 advantageously remains unaltered, so that larger dirt particles that are drawn-in with the reduced volume intake air stream are also reli.ably withdrawn via the reduced passage cross-section of the main flow opening. In the illustrated embodiment, the tongues 21 and 22 cover somewhat less than half oE the width of the main flow opening 15, so that the passage cross-section is reduced by abou-t ~0%.
If the control plate 30 is shifted further out of the position shown in Fig. ~ in the direction of the arrow P, the gulde pln 27 of the middle slide mechanism 25 enter~ a first inclined portion 29', which connects the horlzontal upper end portion 29a with a horizontal intermediate portion 29c in the vertical d:Lreation. The intermediate por-tion 29c is lower than the upper end portion 29a by the distance v/2. Whereas during the ad~ustment 2~3~
movement of the con-trol plate 30 in the dlrection of ~he arrow P, the pin ~7 is conveyed via the inclined portion 29' into ths intermediate portion 29c, the pin 26 of the side slide mechanism 20 is disposed in the lower horizontal end portion 28b, which Eixes the closed position of the side slide mechanism 20.
The half closed position of the middla slide mechanism 25 illustrated in ~ig. 5 results when the pin 27 of the middle slide mechanism 25 is positioned in the intermediate portion 29c. The downward stroke or travel of the middle slide mechanism 25 corresponds to the amount v/2. The central portion 18 of the main flow opening 15 is reduced to half of the passage height. The intake air stream as well as the speed of -the brush roller are further reduced. In this half open position of the middle slide mechanism 25 illustrated in Fig.
ACUUM ~LE~NING TOOL WIT~I ADJUSTA~LE INTAKE AIR FL~W
Background of the Invention The present invention relates to a vacuum cleaning tool having a housing, in a base of which is provided a suction or intake opening for a suction or intake air flow to a vacuum cleaner, the tool also having a brush roller, bristles of which extend through the intake opening, with the brush roller being rotatably driven via an air turbine that is driven by the intake air flow, wi-th this intake air flow belng guided from the intake opening to the air turbine and to a connector of the vacuum cleaning tool via a flow opening.
When vacuum cleaning textile floor coverings and smooth floor surfaces, in order -to loosen dirt particles that adhere to the surface that is being cleaned a rotatabl~ drlven brush roller is used that is disposed in the vacuum cleaning tool, with bristles of the brush roller extending through the intake opening. To clean various textlle floor cov~rings, and to achleve an op-timum cleaning effect at maximum protectlon of the floor covering, the intensity of the suction or intake alr flow must be ad~ustable, as a conse~uence of whlch the speed of the brush roller will also be altered.
It is known to ad~ust the intake alr stream by 2~3~
altering the speed of the suction fan motor via electrical or electronic adJustment means.
However, this type of adJustment of the intake air stream is technically complicated and 0xpensive, and is -therefore used only for large, high-quali-ty vacuum cleaning apparatus.
It is also known to reduce the in-take alr flow through the intake opening of the vacuum cleaning tool vla a so-called secondary air stream. For this purpose, a manually operable adjustment device is disposed in the vacuum hose in the vicinity of the handle for opening and closing a secondary flow opening. Unfortunately, this quite slmple adJus-tment device permits only very course ad~ustment of the in-take air stream, which is often inadequate.
It is therefore an obJect of the present invention to improve a vacuum cleaning tool of the aforamentioned general type ln such a way that the intake alr stream, and hence also the speed oE the brush roller that i8 driven by the air turbine, can be easily and sensitively adJusted.
~rief Description of the Drawings This obJect, and other objects and advantages of the present invention, will appear mor~ alearly ~rom the following specification in con~unction ~3~
with the accomparlylng schematic drawings, in which:
Fig. 1 is a cross-sectivr-al view through one exempl ary embodiment of the inventive vacuurn cleaning tool at the level of a main Elow opening and a secondary flow opening, Fig. 2 is a partially bro}cen-away front view of the vacuum cleaning -tool of Fig~ 1;
Fig. 3 is an enlarged view oE the slide mechanism and control plate disposed in the vacuum cleaning tool, and in particular with the main flow opening completely open;
Fig. 4 is a view similar to Fig. 3 with the side slide mechanism lowered to reduce the passage cross-sectlon of the main flow openincJ;
Fig. 5 is a view similar to Fig~ 4, with the midd1e ~1ide mechani.sm half way lowered;
and Fig. 6 is a view slmilar to Fig. 5, 2~3~1 with the middle slide mechanlsm completely lowered.
Summary of the Invention The vacuum cleaning tool of the presant invention is characterized primarily by at least one slide mechanism that ~s disposed ~n the housing for varying a passage cross-section of the main flow opening and hence for adJusting the volume of the in-take air flow.
Advan-tageously, two slide mechanisms are provided for being able to ad~ust the passage cross-section of the main Elow opening; thesa two slide mechanisms are preferably coupled with ons another in an adJustment path dependent manner.
Pursuant to a further specific embodiment of the present invention, one of the slide mechanisms has two tongues that are associated with the end or side portlons of the flow opening, while the other slide mechanism is associated wlth the central portion of the flow openlng and ls disposed between the tongues of the one slide mechanism. This configuration makes it possible to leave the passage height of the main flow opening unaltered after the side slide mechanism that is provided with the tongues has been lowered, so that even large dirt particles can still ba drawn in without ~3~9~
difficulty.
~y means of the slide mechanism arrangement~
it is possible -to completely interrupt the intake air stream through the intake opening, in which connection it is advan-tageous to at the same time open a secondary flow opening through which a secondary air stream flows from an intake opening -to the air turbine, thereby maintaining the rotating drive for the brush roller.
Further specific features of the present lnvention will be descrlbed in de-tail subsequently.
Descrlption of Preferred Embodiments Referring now to the drawings in detail, the vacuum cleaning tool 1 has a housing 2 in the forward region of which is formed a brush chamber 3. Disposed in the base 6 of this brush chamber is a suction or intake openlng 19 that faces the floor surface 17 that is to be cleaned: the intake opening l9 extends over the entire width of the vacuum cleaning tool 1. Disposed in the brush chamber 3, above the intake opening 19, i9 a brush roller 4, the br:Lstles 5 of which pro~ect beyond the intake opening 19 and thuæ come into con-tact with the floor surface 17 that is to be cleaned.
The brush roller 4 is driven by an air turbine lO via a belt 7, the turbine wheel 11 of the ~3~
tu-bine is mounted in the main housing 2 in such a way as to be rotatable about a horizontal sha~t 12.
In its end or rear portion 8, which is remote from the brush chamber 3, the housing 2 of the vacuum cleaning tool 1 is provided with a pivotably mounted connector 9 via which the vacuum cleaning tool is connected to a non-illustrated vacuum cleaner.
The suction or in-take air stream of the vacuum cleaning -tool flows via the intake opening 19, which rests upon the floor surface 17 that is to be cleaned, into the brush chamber 3, and from there via a flow opening 15 into a flow channel 16, whlch conveys the in-take air stream tangentially relative to the turbine wheel 11; the intake air stream then flows off to the vacuum cleaner via the connector 9. Provided parallel to the maln flow opening 15 in the housing 2 oE the vacuum cleaning tool 1 is a secondary flow opening 38; this secondary flow opening receives outside air via a slit-like suction or intake opening 39 that is provided in the housing 2, with the air then flowing -to the connector 9 via an air inlet opening 37 and the turbine wheel 11.
To ad~us-t the volume of the intake air stream that en-ters via the intake opening 19, and hence ~ 6 --2~3~
also to adjust the speed of the air -turbine 10 -that drives the brush roller 4, a sllde mechanism arrangemen-t 41 is provided in the brush chamber 3 upstream of the main flow openlng 15. The advantage of disposing the slide mechanism arrangament 41 upstream of the maln flow opening 15 and the secondary flow opening 38 is that the slide mechanism can be pressed by the intaka air stream against the rim of the flow openings 15 and 38, -thus ensuring a tight closing-ofE without the need for additional measures.
The construction of the slide mechanism arrangement 41, which is shown in cross-section in Fig. 1, can be seen more clearly from Fig. 2. The flow opening 15 has an essen-tially square or rectangular cross-sectional conflguration and, when seen in the front view oE Fig. 2, is disposed centrally in that wall of -the housing 2 -that separates the housing from the brush chamber 3.
The cross-sec-tional conEiguration of the flow channe]. 16 corresponds to that of the main Elow opening 15.
The slide mechanism arrangement ~1 comprises an approximately U-shaped sida slide mechanism 20, the legs of which are embodi~d as tongues 21 and 22 for covering the side portions 13 and 14 of the 2 ~
main flow opening 15. The U-shaped slide mechanism, which will subsequently be designated as the side slide mechanism 20, is held in -the houslng in such a way that it can be displaced vertical].y relative to the horizontal longltudinal central axis 31 of the main flow opening 15.
Provided between the tongues 21 and 22 of the side slide mechanism 20 is a middle slide mechanism 25, which in order to close oEf the central portion 18 of the main flow opening 15 is held in the housing in such a way as to be displaceable vartically relative to the longitudinal central axis 31 of the main Elow opening 15. Via respective pins 26 and 27, the two slide rnechanisms engage in respective guide slots 28 and 29 of a control plate 30, which is mounted in the housing in such a way as to be displaceable in guide rails 33 and 3~ in the d:Lrection of the longitudinal central axis 31 of the main flow opening 15. The control plate 30 is provided with a grip rnember 35 that extends out through a slot that forms the intalce opening 39 for the secondary flow opening 38. Associated with the grip member 35 are ad~ustment mar}ss 40 that are provided on the housing.
In the open position of the main flow opening 2 ~
15 shown in Fig. 3, the two slide mechan:Lsms 20 and 25 are disposed above -the opening 15. In relat~on to -the main Elow opening 15, the middle slide mechanism 25, in its "open position", completely uncovers the main flow opening 15; at the same time, however, in the open position o the main flow opening 15 the middle slide mechanism 25 closes off the secondary flow opening 38, as shown by broken lines in Fig. 1. In this position illustrated in Fig. 3, the pin 26 of the side slide mechanism 20, and the pin 27 of -the middle slide mechanism 25, are disposed in end portions 28a and 29a of the guide slots 28 and 29 r0spectlvely.
These end portions 28a and 29a are disposed essentially parallel to the longltudinal central axls 31 oE the main flow opening 15. The vertical or heigh-t positions of the end portions 28a and 29a of the guide slots 28 and 29 determine the open positlons of the side slide mechanism 20 and the middle slide mechanism 25 illustrated in Fig. 3.
The end portion 28a of the guide slot 28 has a horizontal dimens:lon that essentially corresponds to the dlameter of the gu:lde pin 26. The other end portion 28b of the guide slot 28 is disposed parallel to the end portion 28a, but is lower by the vertical distance "u", which corresponds to the 2~3~
stroke or travel of the side slide mechanlsm 20 from its open posltion shown in Fig. 3 -to its closed position shown in Figs. ~ to 6. The two horizontal end portions 28a and 28b mer~e with one another via an inclined portion 28'.
When viewed from the top, the hori~on-tal end portion 29a of the guide slo-t 29 that is associated with the middle slide mechanism 25 has a length that corresponds appro~imately to the leng-th of the end portion 28a plus the inclined portion 28'.
When the control plate 30 is moved in the direction o~ the arrow P, the pin 27 is gulded in the horizontal end portion 29a, as a result of which the middle slide mechanism 25 remains in its open position. In con-trast, after a short ad~ustment path o~ the control plate 30, tha pin 26 o~ the slde slide mechanism 20 leaves the end portion 28a and en-ters the inclined portion 28', being shifted by the distance "u" until it reaches the lower horizontal end portion 28b, as a result o~ which the side slide mechanism 20 is displaced into i-ts closed position i:llustrated in ~ig. 4. Whereas the side slide mechanism 20 in -the closed position s}lown in Fig. 4 has thus closed off the end or side portions 13 and 14 o~ the main flow opening 15, the middle slide mechanism 25 maintains i-ts open 2~3~
position, in which it close.s off tha secondary flow opening 38. The passage cross-section of the main flow opening 15 is reduced by the side portions 13 and 1~ that are covered by the tongues 21 and 22 of the side slide mechanism 20; in conformity with the reduced intake air stream, the drive speed of the air turbine 10 is reduced, so that the brush roller 4 rotates mor~ slowly. The height of the main flow opening 15 advantageously remains unaltered, so that larger dirt particles that are drawn-in with the reduced volume intake air stream are also reli.ably withdrawn via the reduced passage cross-section of the main flow opening. In the illustrated embodiment, the tongues 21 and 22 cover somewhat less than half oE the width of the main flow opening 15, so that the passage cross-section is reduced by abou-t ~0%.
If the control plate 30 is shifted further out of the position shown in Fig. ~ in the direction of the arrow P, the gulde pln 27 of the middle slide mechanism 25 enter~ a first inclined portion 29', which connects the horlzontal upper end portion 29a with a horizontal intermediate portion 29c in the vertical d:Lreation. The intermediate por-tion 29c is lower than the upper end portion 29a by the distance v/2. Whereas during the ad~ustment 2~3~
movement of the con-trol plate 30 in the dlrection of ~he arrow P, the pin ~7 is conveyed via the inclined portion 29' into ths intermediate portion 29c, the pin 26 of the side slide mechanism 20 is disposed in the lower horizontal end portion 28b, which Eixes the closed position of the side slide mechanism 20.
The half closed position of the middla slide mechanism 25 illustrated in ~ig. 5 results when the pin 27 of the middle slide mechanism 25 is positioned in the intermediate portion 29c. The downward stroke or travel of the middle slide mechanism 25 corresponds to the amount v/2. The central portion 18 of the main flow opening 15 is reduced to half of the passage height. The intake air stream as well as the speed of -the brush roller are further reduced. In this half open position of the middle slide mechanism 25 illustrated in Fig.
5, the secondary flow openlng 38 (Fig. 1) is partially opened, so that ln addition to the minimal intake air stream for driving the air turbine lO via the flow channel 16, a secondary air flow is built up via the intake opening 39, the secondary flow opening 38, and the air inlet opening 37 for driving the air turbine lO. Thus, the drive of the air turbine 10 that is reduced durlng minimal vacuum cleaning effect b~ the minimal intake air stream is partially compensated for in order to make an adequate tor~ue available at the brush roller 4.
If the control plate 30 is shifted further in the direction of the arrow ~, the guide pin 27 of the middle slids mechanism 25 is transferred via a further inclined portion 29" from -the in-termediate portion 29c into the horizontal end portion 29b, thereby carrylng out the secorld half stroke v/2.
In this position, which is illustrated in Fi~. 6, the guide pins 26 and 27 are disposed at the back ends of the guide slots 28 and 29, as a result of which the main flow opening 15 is completely closed. The intake air stream from the intake opening 19 to the conneator 9 for carrylng off loosened dirt particles is interrupted.
In the closed position of the middla slide mechanism 25 of Fig. 6, the secondary ~low opening 38 is completely opened, as shown in Flg. 1, so that via the intake opening 39, the seconclary flow opening 38, and the air lnlet openin~ 37 an unrestricted secondary air stream flows into the housing 2 for driving the air turbine 10. This ensures that even when the main flow opening 15 is closed, a rotating drive of the brush roller 4 is 2 ~ g ~
effscted, so that Eor example a te~tile ~loor covering or the like can be brushed to improv0 the visual effect.
The aforementioned adjustment marks 40 on the housing are associated with the positions o~ the control plate 30~ Ir- the completely closed position of the main flow opening 15 (Fig. 6), the grip member 35 of the con-trol plate 30 is located exactly at the mark "O". When the grip member 35 is shifted to the mark "1", the slide mechanism arran~ement 41 assumes the position shown in Fig.
5, where the central portion 18 of the main flow opening 15 is opened half way.
If the grip member 35 is located at the mark "2" (Figs. 2, 4), the central portion 18 of the main flow openlng 15 is completely opened. ~y shifting the grip member 35 to the mark "3", the main flow opening 15 ls then completely opened, as shown in ~ig. 3.
As already descrlbed above, ln the posltion "O", the secondary flow opening 38 is completely opened, whereas whel- the sllde mechanism arrangement 41 ls set at the mar~ "1", the secondary flow opening is partially opened~ At the setting "2", the secondary ~low opening 38 is completely closed.
2~3~
Rather than carrying out the displacement of the slid~ mechanisms in stages, i-t can also be expedient to effect such displacement in an infinitely variable manner. For this purpose, for example, the end portion 29a can merge with the lower end position 29b, which determines a closed position, via an inclined portion that is illustrated by dashed lines in Fi~. 6. The important thing for the configuration of the guide slot 2CJ i5 tha-t the one slide mechanism (for example the middle slide mechanism 25) can be lowered for closing o~f the flow opening only when the other slide mechanism (for example -the side slide mechanism 20) has at least approximately reached its closed posltion. In particular applications, it can be advantageous to synchronously move both slide mechanisms or to separately acl~ust each slide mechanism via a suitable adjustment arrangemellt.
The present invention is, of course, in no way restricted to the specific disclosure oi the specifi.cation and drawings, but also encompasses any modifications within the scope of the appended claims.
If the control plate 30 is shifted further in the direction of the arrow ~, the guide pin 27 of the middle slids mechanism 25 is transferred via a further inclined portion 29" from -the in-termediate portion 29c into the horizontal end portion 29b, thereby carrylng out the secorld half stroke v/2.
In this position, which is illustrated in Fi~. 6, the guide pins 26 and 27 are disposed at the back ends of the guide slots 28 and 29, as a result of which the main flow opening 15 is completely closed. The intake air stream from the intake opening 19 to the conneator 9 for carrylng off loosened dirt particles is interrupted.
In the closed position of the middla slide mechanism 25 of Fig. 6, the secondary ~low opening 38 is completely opened, as shown in Flg. 1, so that via the intake opening 39, the seconclary flow opening 38, and the air lnlet openin~ 37 an unrestricted secondary air stream flows into the housing 2 for driving the air turbine 10. This ensures that even when the main flow opening 15 is closed, a rotating drive of the brush roller 4 is 2 ~ g ~
effscted, so that Eor example a te~tile ~loor covering or the like can be brushed to improv0 the visual effect.
The aforementioned adjustment marks 40 on the housing are associated with the positions o~ the control plate 30~ Ir- the completely closed position of the main flow opening 15 (Fig. 6), the grip member 35 of the con-trol plate 30 is located exactly at the mark "O". When the grip member 35 is shifted to the mark "1", the slide mechanism arran~ement 41 assumes the position shown in Fig.
5, where the central portion 18 of the main flow opening 15 is opened half way.
If the grip member 35 is located at the mark "2" (Figs. 2, 4), the central portion 18 of the main flow openlng 15 is completely opened. ~y shifting the grip member 35 to the mark "3", the main flow opening 15 ls then completely opened, as shown in ~ig. 3.
As already descrlbed above, ln the posltion "O", the secondary flow opening 38 is completely opened, whereas whel- the sllde mechanism arrangement 41 ls set at the mar~ "1", the secondary flow opening is partially opened~ At the setting "2", the secondary ~low opening 38 is completely closed.
2~3~
Rather than carrying out the displacement of the slid~ mechanisms in stages, i-t can also be expedient to effect such displacement in an infinitely variable manner. For this purpose, for example, the end portion 29a can merge with the lower end position 29b, which determines a closed position, via an inclined portion that is illustrated by dashed lines in Fi~. 6. The important thing for the configuration of the guide slot 2CJ i5 tha-t the one slide mechanism (for example the middle slide mechanism 25) can be lowered for closing o~f the flow opening only when the other slide mechanism (for example -the side slide mechanism 20) has at least approximately reached its closed posltion. In particular applications, it can be advantageous to synchronously move both slide mechanisms or to separately acl~ust each slide mechanism via a suitable adjustment arrangemellt.
The present invention is, of course, in no way restricted to the specific disclosure oi the specifi.cation and drawings, but also encompasses any modifications within the scope of the appended claims.
Claims (14)
1. In a vacuum cleaning tool having a housing, in a base of which is provided an intake opening for an intake air flow to a vacuum cleaner, said tool also having a brush roller, bristles of which extend through said intake opening, with said brush roller being rotatably driven via an air turbine that is driven by said intake air flow, and with said intake air flow being guided from said intake opening to said air turbine and to a connection of said tool via a main flow opening, the improvement comprising:
at least one slide mechanism that is disposed in said housing for varying a passage cross-section of said main flow opening and hence for adjusting the volume of said intake air flow.
at least one slide mechanism that is disposed in said housing for varying a passage cross-section of said main flow opening and hence for adjusting the volume of said intake air flow.
2. A vacuum cleaning tool according to claim 1, which includes two slide mechanisms for varying said passage cross-section of said main flow opening.
3. A vacuum cleaning tool according to claim 2, in which said two slide mechanisms are coupled with one another in an adjustment path dependent manner.
4. A vacuum cleaning tool according to claim 2, in which a first one of said slide mechanisms has two tongues that are associated with side portions of said main flow opening, while a second one of said slide mechanisms is associated with a central portion of said main flow opening and is disposed between said tongues of said first slide mechanism.
5. A vacuum cleaning tool according to claim 4, in which said slide mechanisms are mounted so as to be vertically displaceable relative to a horizontal central axis of said main flow opening.
6. A vacuum cleaning tool according to claim 4, which includes a common control plate for operating said slide mechanisms, with said control plate being displaceably mounted in said housing and being provided with a grip member that extends out of said housing.
7. A vacuum cleaning tool according to claim 6, in which said control plate is mounted in said housing so as to be displaceable in the direction of a horizontal central axis of said main flow opening.
8. A vacuum cleaning tool according to claim 6, in which said control plate is provided with guide slots, and said slide mechanisms are provided with guide pins for holding and guiding said slide mechanisms in said guide slots of said control plate.
9. A vacuum cleaning tool according to claim 8, which includes a controllable secondary flow opening that is disposed parallel to said main flow opening, with a secondary air flow flowing from a further intake opening through said secondary flow opening and to said air turbine.
10. A vacuum cleaning tool according to claim 9, in which adjustment of a passage cross-section of said secondary flow opening is a function of adjustment of said passage cross-section of said main flow opening such that with said main flow opening open said secondary flow opening is closed, with said main flow opening partially closed said secondary flow opening is partially open, and with said main flow opening completely closed said secondary flow opening is completely open.
11. A vacuum cleaning tool according to claim 10, in which an adjustment slot in said housing through which said grip member extends forms said further intake opening for said secondary air flow.
12. A vacuum cleaning tool according to claim 10, in which said second slide mechanism is a middle slide mechanism in the form of a closure member for controlling said passage cross-sections of said main flow opening and said secondary flow opening.
13. A vacuum cleaning tool according to claim 2, in which one of said slide mechanisms is a side slide mechanism and the other is a middle slide mechanism, with said slide mechanisms being coupled with one another as a function of their position such that said middle slide mechanism is lowerable only after complete lowering of said side slide mechanism.
14. A vacuum cleaning tool according to claim 6, in which said slide mechanisms and said control plate are disposed in a brush chamber of said housing for said brush roller upstream of said main flow opening.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4108900.6 | 1991-03-19 | ||
| DE4108900A DE4108900C2 (en) | 1991-03-19 | 1991-03-19 | Suction cleaning tool with adjustable suction air flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2053991A1 true CA2053991A1 (en) | 1992-09-20 |
Family
ID=6427641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002053991A Abandoned CA2053991A1 (en) | 1991-03-19 | 1991-10-22 | Vacuum cleaning tool with adjustable intake air flow |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPH04325133A (en) |
| KR (1) | KR920017618A (en) |
| CA (1) | CA2053991A1 (en) |
| DE (1) | DE4108900C2 (en) |
| FR (1) | FR2674117B1 (en) |
| GB (1) | GB2253780A (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980023805A (en) * | 1996-09-30 | 1998-07-06 | 배순훈 | Brush Drive for Vacuum Cleaner |
| DE29621116U1 (en) * | 1996-12-05 | 1997-02-13 | Wessel-Werk GmbH, 51580 Reichshof | Suction head for a vacuum cleaner |
| DE60013087T2 (en) * | 2000-01-27 | 2005-07-14 | New Ermes Europe S.P.A., Albizzate | Turbo brush for cleaning surfaces |
| DE10042669C5 (en) * | 2000-08-31 | 2012-05-10 | Düpro AG | Vacuum cleaning tool with injector air supply |
| DE10110312C1 (en) * | 2001-03-03 | 2002-10-02 | Duepro Ag Romanshorn | Suction cleaning tool with rotating brush roller |
| GB0126494D0 (en) | 2001-11-03 | 2002-01-02 | Dyson Ltd | A floor tool |
| GB2393383B (en) * | 2002-09-24 | 2005-12-28 | Dyson Ltd | A vacuum cleaning head |
| DE10306824B3 (en) * | 2003-02-19 | 2004-10-21 | Helmut Bucksch | Rotary suction jet for electric vacuum cleaner with rotation of suction tube fitted with cleaning tool by air turbine supplied with drive air via separate air channel for independent regulation of suction and rotation |
| KR100555319B1 (en) * | 2004-12-22 | 2006-03-03 | 삼성광주전자 주식회사 | A dust-collecting apparatus for a vacuum cleaner and a dust-collecting method for the same |
| US20060277713A1 (en) * | 2005-06-08 | 2006-12-14 | Randall Sandlin | Vacuum turbo nozzle with movable visor |
| GB201003603D0 (en) | 2010-03-04 | 2010-04-21 | Dyson Technology Ltd | A vacuum cleaning head |
| GB201003601D0 (en) | 2010-03-04 | 2010-04-21 | Dyson Technology Ltd | A vacuum cleaning appliance |
| GB201003604D0 (en) * | 2010-03-04 | 2010-04-21 | Dyson Technology Ltd | A vacuum cleaning head |
| GB2504940B (en) | 2012-08-13 | 2014-12-24 | Dyson Technology Ltd | Cleaner head for a vacuum cleaner |
| CN103110392A (en) * | 2013-03-15 | 2013-05-22 | 林小泉 | Wind-driven floor brush |
| GB2562524B (en) | 2017-05-18 | 2019-10-02 | Dyson Technology Ltd | Suction nozzle |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE6935036U (en) * | 1969-09-05 | 1969-12-18 | Happich Gmbh Fa Geb | BALL FANS, IN PARTICULAR FOR VEHICLES |
| DE8405468U1 (en) * | 1984-02-23 | 1984-05-24 | Vorwerk & Co Interholding Gmbh, 5600 Wuppertal | HEAD NOZZLE FOR VACUUM CLEANER |
| DE3414860A1 (en) * | 1984-04-19 | 1985-11-07 | Miele & Cie GmbH & Co, 4830 Gütersloh | Vacuum cleaner nozzle with suction tube connection, sliding sole and rotating brush cylinder |
| DE8712295U1 (en) * | 1987-09-10 | 1987-10-22 | Werner & Mertz Gmbh, 6500 Mainz | Vacuum cleaner with rotating brush |
| JPH01221128A (en) * | 1988-02-29 | 1989-09-04 | Matsushita Electric Ind Co Ltd | Turbine nozzle for vacuum cleaner |
| JPH01221129A (en) * | 1988-02-29 | 1989-09-04 | Matsushita Electric Ind Co Ltd | Turbine nozzle for vacuum cleaner |
| JPH01223920A (en) * | 1988-03-03 | 1989-09-07 | Matsushita Electric Ind Co Ltd | Turbine nozzle of vacuum cleaner |
| JP2583958B2 (en) * | 1988-04-20 | 1997-02-19 | 松下電器産業株式会社 | Floor nozzle for vacuum cleaner |
-
1991
- 1991-03-19 DE DE4108900A patent/DE4108900C2/en not_active Expired - Fee Related
- 1991-06-17 JP JP3144828A patent/JPH04325133A/en active Pending
- 1991-10-22 CA CA002053991A patent/CA2053991A1/en not_active Abandoned
- 1991-11-14 KR KR1019910020219A patent/KR920017618A/en not_active Application Discontinuation
-
1992
- 1992-02-28 GB GB9204338A patent/GB2253780A/en not_active Withdrawn
- 1992-03-11 FR FR9202920A patent/FR2674117B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE4108900C1 (en) | 1992-11-19 |
| KR920017618A (en) | 1992-10-21 |
| GB2253780A (en) | 1992-09-23 |
| JPH04325133A (en) | 1992-11-13 |
| GB9204338D0 (en) | 1992-04-08 |
| FR2674117A1 (en) | 1992-09-25 |
| FR2674117B1 (en) | 1994-12-30 |
| DE4108900C2 (en) | 1998-06-10 |
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| Date | Code | Title | Description |
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| FZDE | Dead |