CA1043961A - Vacuum cleaner air deflector - Google Patents
Vacuum cleaner air deflectorInfo
- Publication number
- CA1043961A CA1043961A CA250,138A CA250138A CA1043961A CA 1043961 A CA1043961 A CA 1043961A CA 250138 A CA250138 A CA 250138A CA 1043961 A CA1043961 A CA 1043961A
- Authority
- CA
- Canada
- Prior art keywords
- baffle
- vacuum cleaner
- inlet opening
- mounting means
- housing
- 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.)
- Expired
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
- A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
- A47L7/009—Details of suction cleaner tools for additional purposes
Landscapes
- Filters For Electric Vacuum Cleaners (AREA)
Abstract
ABSTRACT
The present invention relates to a baffle which may be positioned adjacent the inlet opening of a vacuum cleaner. The baffle comprises mounting means connectable to the vacuum cleaner housing and air deflecting means. The deflecting means include a first flat portion which can extend transversely of the flow path at the inlet opening and a second curved portion which interconnects the first portion and the mounting means, the deflecting means thereby having a J-shape in cross-section. Incoming air is directed by the first portion towards the curved portion which in turn directs the air back towards the inlet opening. The resultant mixing and turbulence results in an overall reduction in air velocity within the housing and consequently there is a great reduction in agitation of dust within the housing, both during start-up and during continuous operation. This result is very desirous as it increases the efficiency of the vacuum cleaner by keep-ing the dust from partially clogging the filter.
The present invention relates to a baffle which may be positioned adjacent the inlet opening of a vacuum cleaner. The baffle comprises mounting means connectable to the vacuum cleaner housing and air deflecting means. The deflecting means include a first flat portion which can extend transversely of the flow path at the inlet opening and a second curved portion which interconnects the first portion and the mounting means, the deflecting means thereby having a J-shape in cross-section. Incoming air is directed by the first portion towards the curved portion which in turn directs the air back towards the inlet opening. The resultant mixing and turbulence results in an overall reduction in air velocity within the housing and consequently there is a great reduction in agitation of dust within the housing, both during start-up and during continuous operation. This result is very desirous as it increases the efficiency of the vacuum cleaner by keep-ing the dust from partially clogging the filter.
Description
The ~resent invention relat~s to suction-~vpe vacuu~ cleaners in general and to a de~lector or baffle for the inlet openin~ of a suction-t~pe vacuum cleancr in particular.
Bl~CK(~ROUND OF T}~E I~VE~lTION
_ _ Vacuum cleaners have been known for many years and there are many varieties and conEiqurations on the market although there are basically two types, namely the household or upright type where dirt is deposited in a disposable ha~
and the industrial type where the dirt is deposited in an emptyable container or canister. The present invention is particularly concerned with the industrial type of vacuum cleaner.
The industrial type of vacuum cleaner, as indicated above can be easily emptied. Usually the dirt or debris accumulates in a canister which in many instances doubles as the housing for the unit, the motor and pump section being removable therefrom to gain access. Because access to the interior of the vacuum cleaner must be possible, it is necessary to seal the access opening against leakage from the exterior.
This is necessary to maintain high degrees of suction and thereby maintain the cleaning efficiency of the vacuum.
- Since there is direct flow from the suction nozzle to the interior of the vacuum cleaner there will be considerable turbulence within the lnterior during operation. The turbulence can be especially disturbing when the machine is first started as there will be a sudden inrush of air which will cause the dirt and debris already accumulated to swirl about. It is therefore desirable to control the incoming air in such a manner that there is little or no disturbance of accumulated dirt and debris and in such a manner that dirt is rapidly re-moved from the incoming air stream and deposited at the bottom of the container. Certainly swirling dirt within the canister . .. .
'~
would reduce the effectiveness or efficiency of the vacuum cleaner as it could ~uickly partially clog the filter through which air must pass to leave the canister.
There h~ve been num~rous attem~ts`at controlling the incoming air, each of the attempts usually involving the positioning of a deflector over the inlet opening within the canister. The deflectors of Canadian PAtent 649,0~5 (Fillery, September 25, 1962) and of U.S. Patent 2,9~5,905 (Caufield, May 30, 1961) merely deflect the incomin~ air downwardly so that the dirt carried thereby is quickly directed towards the bottom of the container. There will be little change in flow velocity and hence on start-up the dirt already accumulated will be disturbed and will eventually fill the interior, in suspension, unless it is very heavy. The deflector of U.S.
Patent 3,534,429 (Rhoads, October 20, 1970) gives the incoming air a downward and a swirling effect but it does nothing ta prevent the swirling effect of dirt within its canister sec~ion.
The present invention on the other hand ~rovides a baffle which not only causes the dirt to be rapidly dropped from the incoming air but also slows the incoming àir suff-iciently so that it will not cause agitation of the dirt with-in the canister, either at start-up or during normal operation.
This effect is achieved by forming the baffle in such a manner that the incoming air is essentially forced to reverse its direction of flow, thereby greatly reducing the actual flow velocity in the area of the baffle, allowing the dirt to quickly fall from the air stream to the bottom of the canister where it will remain until emptied. However, while the flow veloclty is reduced, there is no reduction in the mass flow rate as it re-mains constant. Thus the baffle of the present invention has theeffect of increasing the diameter of the inlet to the canister.
The baffle has .
.: . ,. . . : .. ,, , ~ , lr~
t-lo ma~or portlons, the first being a generally flat portion which will he placed across the f low path in a normal fashion with the exception that it slooes towards the wall o~ the canister s~ as to give the inco~ing air a deflected direction of flow inwards, and usually upwards, of the canister. The second major portion is a curved section which interconnects the first portion to means for mount:ing the baffle to the canister wall. The curved portion ~ay be an arc of a circle and it serves to direct the air flow back on itself to reduce its velocity. Thus the two major portions cooperate to produce a baffle which is very effective in its operation and which aids in improvina the efficiency of the vacuum cleaner.
In its broadest form the present invention may be defined as a baffle for a vacuum cleaner comprisin~ mountin~ means for connecting the baffle within the vacuum cleaner adjacent an inlet opening in a wall thereof, and deflectin~ means for controlling air 10w within the vacuum cleaner, the deflecting means having a generally J-shape in lon~itudinal cross-section and including a first generally flat portion and a second generally curved portion interconnecting the first portion and the mounting means, whereby when mounted within the vacuum cleaner, the first portion is positioned in front of the inlet opening.
The present invention will be described in greater detail with reference to the drawinas wherein:
~ igure 1 shows the baffle of the present invention in position within a canister type vacuum cleaner.
Figure 2 shows the baffle of the present invention in perspective.
Figure 3 shows a plan view of the baffle of the present invention.
Figure 4 shows a lonyitudinal cross-section taken along the line 4-4 of Figure 2.
~ 3~3 ~ ~
Fi~ure 5 sho~s a transverse cross-section taken alon~ the line 5-5 of Fi~ure 2.
ywl/ - - 3a -- . . .
J ~ ~
Figur~ 1 sho~s the typical environment for the present invention, in particular a c~nister-type vacuum cleaner 10 having a gencrally cylindrical housing 12 containing an cxhaust o~en~g 1~ a ~ilter 15 and cm Ln]~t op~nin~ 16, the inlet opening establishing a flow path F for air entering the vacuum cleaner. The baffle of the present invention is designated by reference number 18 and is shown in position such that a portion thereof extends transversely of the flow path F.
The baffle of the present invention is illustrated in greater detail in Figures 2 to 5. As seen in Figures 2 and 4, the baffle has a mounting means 20 which includes a generally upright (relative to Figure 1) flange 22 having holes 24 therethrough for connecting the baffle to the wall of the canister housing as by screws, bolts or rivets. Figure 2 and 3 illustrate the curvaturè of the flange 22 which is intended to conform to that of the housing 12 so that there wlll be no escape of air between flange 22 and housing 12.
The mounting means 20 also includes a flange portion 26 which projects from the bottom edge of flange 22 generally at right angles thereto. The direction of projection is such as to be inwards of the housing when the baffle is mounted therein as seen in Figure 1.
The baffle of the present invention also comprises deflecting means 28 which as seen in Figures 1, 2 and 4 has a generall~- J-shape in longitudinal cross-section. The deflecting means includes a first generally flat portion 30 and a second generally curved portion 32 which interconnects the first portion and the mounting means.
Figures 1 and 4 illustrate a property of the present invention which aids in its effectiveness and that is the orientation of the first portion 30 relative to the mounting means 20 or the housing 12. The planes 34 and 36 -. - ~
~ ~; ,.~ . . .
~0~3~1 containing the ~irst portion 30 and the mounting flange 22 respectively converge at an angle of convergence ~ which may bc of the order of 3 to 4~. T~is has the effect of placing the first portion at an angle wlth respcct to the flow path F, other than at 90, so as to direct incoming air towards the curved portion, upwardly as in Figure 4 The direction of convergence may be defined as from the curved portion 32 longitudinally towards the free edge 38 of the first portion.
Adjacent the free end 38 of the first portion is a section 40 which is angled with respect to the flow path and the plane 36 at a greater angle ~ than the angle . In fact the angle ~ may be of the order of 33 to 34, preferably 33 1/2. Each side edge of the first portion 30 and the curved portion 32 is curved inwardly oF the baffle as seen at 42 in Figures 2, 3 and 5. The curved side edges 42 and the angled section 40 aid in air control and ~`
also add rigidity to the baffle.
~~aving described the basic structure of the present invention, its operation in a vacuum cleaner will be described hereinbelow. As seen in Figure 1 the baffle is connected to the inside surface of the housing 12 with the mounting means 20 adjacent the inlet opening 16 and the first por-tion 30 of the deflecting means 28 extending generally transversely of the flow path F. Needless to say the width of the baffle is greater than that of the flow path F.
Also, the preferred, but not essential, orientation of the baffle is such that when in place the first portion extends in a downwardly direction. Air entering the vacuum cleaner along the flow path F will strike the first portion 30 and, due to the convergence angle ~, will be deflected in an upward direction, toward the curved portion 32. The curved portion 32 lies outside the boundaries of flow path F and may be an arc of a circle. The air deflected towards the curved portion 32 will thus be directed back towards -- S --rm/
.
.~ ~
the inlct openinc~ 16 ancl this cleflectecl air will strike and intermix with the incoming air in flow path F, creating tur-bulence and almost immediately reducin~ the velocity of the incoming air. This phenomenon occurs continuously, as long as there is air flo~ in the vacuum cleaner. The curved ed~es a2 and the angled section ~0 tend to aid in containing air behind the baffle for slightly longer th~n micJht otherwise occur, thereby increasing the time period during which velocity can be scrubbed from the incominq air. The rapid decrease in air velocity and the turbulence created behind the baffle also results in a rapid drop of dust-and dirt particles from the incomlng air.
The flow paths in the deflector portion are illu-strated in Figure 4. As indicate~ above a portion of the air is directed into the curved portion 32 while another portion is directed downwardly, this "splittin~" of the air flow creating a generally conical dead area located essentially at the center of the incoming flow path. This dead area is further evidence of the mixing and turbulent action in the vicinity of the curved portion 32. The dead area was dis-covered experimentally by coating the inside surface of a baffle with lamp black and directing air flow through the inlet 16, the air carrying light dust particles. The particles impinging on the baffle removed the lamp black from all but a circular area central of the flow path. Heavier particles, of course will, penetrate the dead area and hence a physical cone could not effectively be positioned to replace the dead area. Such heavier particles (eg. wet string) might catch on a solid cone and eventually clog the intake. Absent a 3~ solid cone such particles will penetrate the dead area, strike the baffle and drop directly to the canister bottom.
The advantages of the present invention are particu-larly evident at start-up, especially when there is a layer MR/~ ~..
of dust within thc vacuum cleaner. Because the hi~h speed incoming air is so effectively slowed by the baffle there is little or no disturbance of the initial dust layer and during continued oper~tion the level of agitation within the housing is considerably less than what is achieved when no baffle is used or even when a prior art deflector is used. With prior art deflectors there is hardly any change in air speed; there is a change only in the direction of air flow and this is not sufficient to prevent initial or continued agitation of the dust or dirt within the vacuum cleaner. The present invention is also advantageous because it prolongs the period of effec-tiveness of filters within the vacuum cleaner as thev do not cloq as fast as previously. Also there is less chance of dust leakage as there is little dust s~spended within the confines of the vacuum cleaner which might escape through leaks. These advantages have been illustrated in an experimental unit where~
in a baffle constructed in accordance with the ~resent invention was mounted within a transparent vacuum cleaner housing and a ~ layer of dust~was placed within the housing. When the vacuum cleaner was started there was no discernable agitation of the dust layer and the space above the dust layer was clear. Nith-out the baffle, or with other designs of prior art deflector, there was an almost instantaneous agitation and the space above the dust layer was quickly filled with suspended, swirling dust particles.
Further experiments have been conducted with vacuum cleaners of the wet type. When prior art baf~les, are used, water drawn into the canister undergoes a violent swirl-ing action and the filter becomes very wet above the static water level. With the baffle of the present invention however the water maintains its static level and is not subjected to the violent swirling action. Tests have shown that the filter remains dry above the static water level. Similar tests with MR/~
`
3~3~:~
foam have shown similar, and dramatic results. Instead of the foam billowin~ and filling the canister, and hence clo~ging the filter, it remains in the bottom oE the canister and shows a static level in the same manner as does water. The only imper-fection in a relatively smooth surEace is a slight indentation directly below the baffle where ai.r deflected downwardly dis-places a small quantity of foam at the surface. Needless to say this is a considerable improvement over the results obtain-able with prior art baffles.
It is understood that a person skilled in the art may find alternative configurations or orientations of the present invention which may achieve the desired results and which may not have been described herein. The scope of the present invent,ion is thus to be ascertained by the claims appended hereto.
MR~
Bl~CK(~ROUND OF T}~E I~VE~lTION
_ _ Vacuum cleaners have been known for many years and there are many varieties and conEiqurations on the market although there are basically two types, namely the household or upright type where dirt is deposited in a disposable ha~
and the industrial type where the dirt is deposited in an emptyable container or canister. The present invention is particularly concerned with the industrial type of vacuum cleaner.
The industrial type of vacuum cleaner, as indicated above can be easily emptied. Usually the dirt or debris accumulates in a canister which in many instances doubles as the housing for the unit, the motor and pump section being removable therefrom to gain access. Because access to the interior of the vacuum cleaner must be possible, it is necessary to seal the access opening against leakage from the exterior.
This is necessary to maintain high degrees of suction and thereby maintain the cleaning efficiency of the vacuum.
- Since there is direct flow from the suction nozzle to the interior of the vacuum cleaner there will be considerable turbulence within the lnterior during operation. The turbulence can be especially disturbing when the machine is first started as there will be a sudden inrush of air which will cause the dirt and debris already accumulated to swirl about. It is therefore desirable to control the incoming air in such a manner that there is little or no disturbance of accumulated dirt and debris and in such a manner that dirt is rapidly re-moved from the incoming air stream and deposited at the bottom of the container. Certainly swirling dirt within the canister . .. .
'~
would reduce the effectiveness or efficiency of the vacuum cleaner as it could ~uickly partially clog the filter through which air must pass to leave the canister.
There h~ve been num~rous attem~ts`at controlling the incoming air, each of the attempts usually involving the positioning of a deflector over the inlet opening within the canister. The deflectors of Canadian PAtent 649,0~5 (Fillery, September 25, 1962) and of U.S. Patent 2,9~5,905 (Caufield, May 30, 1961) merely deflect the incomin~ air downwardly so that the dirt carried thereby is quickly directed towards the bottom of the container. There will be little change in flow velocity and hence on start-up the dirt already accumulated will be disturbed and will eventually fill the interior, in suspension, unless it is very heavy. The deflector of U.S.
Patent 3,534,429 (Rhoads, October 20, 1970) gives the incoming air a downward and a swirling effect but it does nothing ta prevent the swirling effect of dirt within its canister sec~ion.
The present invention on the other hand ~rovides a baffle which not only causes the dirt to be rapidly dropped from the incoming air but also slows the incoming àir suff-iciently so that it will not cause agitation of the dirt with-in the canister, either at start-up or during normal operation.
This effect is achieved by forming the baffle in such a manner that the incoming air is essentially forced to reverse its direction of flow, thereby greatly reducing the actual flow velocity in the area of the baffle, allowing the dirt to quickly fall from the air stream to the bottom of the canister where it will remain until emptied. However, while the flow veloclty is reduced, there is no reduction in the mass flow rate as it re-mains constant. Thus the baffle of the present invention has theeffect of increasing the diameter of the inlet to the canister.
The baffle has .
.: . ,. . . : .. ,, , ~ , lr~
t-lo ma~or portlons, the first being a generally flat portion which will he placed across the f low path in a normal fashion with the exception that it slooes towards the wall o~ the canister s~ as to give the inco~ing air a deflected direction of flow inwards, and usually upwards, of the canister. The second major portion is a curved section which interconnects the first portion to means for mount:ing the baffle to the canister wall. The curved portion ~ay be an arc of a circle and it serves to direct the air flow back on itself to reduce its velocity. Thus the two major portions cooperate to produce a baffle which is very effective in its operation and which aids in improvina the efficiency of the vacuum cleaner.
In its broadest form the present invention may be defined as a baffle for a vacuum cleaner comprisin~ mountin~ means for connecting the baffle within the vacuum cleaner adjacent an inlet opening in a wall thereof, and deflectin~ means for controlling air 10w within the vacuum cleaner, the deflecting means having a generally J-shape in lon~itudinal cross-section and including a first generally flat portion and a second generally curved portion interconnecting the first portion and the mounting means, whereby when mounted within the vacuum cleaner, the first portion is positioned in front of the inlet opening.
The present invention will be described in greater detail with reference to the drawinas wherein:
~ igure 1 shows the baffle of the present invention in position within a canister type vacuum cleaner.
Figure 2 shows the baffle of the present invention in perspective.
Figure 3 shows a plan view of the baffle of the present invention.
Figure 4 shows a lonyitudinal cross-section taken along the line 4-4 of Figure 2.
~ 3~3 ~ ~
Fi~ure 5 sho~s a transverse cross-section taken alon~ the line 5-5 of Fi~ure 2.
ywl/ - - 3a -- . . .
J ~ ~
Figur~ 1 sho~s the typical environment for the present invention, in particular a c~nister-type vacuum cleaner 10 having a gencrally cylindrical housing 12 containing an cxhaust o~en~g 1~ a ~ilter 15 and cm Ln]~t op~nin~ 16, the inlet opening establishing a flow path F for air entering the vacuum cleaner. The baffle of the present invention is designated by reference number 18 and is shown in position such that a portion thereof extends transversely of the flow path F.
The baffle of the present invention is illustrated in greater detail in Figures 2 to 5. As seen in Figures 2 and 4, the baffle has a mounting means 20 which includes a generally upright (relative to Figure 1) flange 22 having holes 24 therethrough for connecting the baffle to the wall of the canister housing as by screws, bolts or rivets. Figure 2 and 3 illustrate the curvaturè of the flange 22 which is intended to conform to that of the housing 12 so that there wlll be no escape of air between flange 22 and housing 12.
The mounting means 20 also includes a flange portion 26 which projects from the bottom edge of flange 22 generally at right angles thereto. The direction of projection is such as to be inwards of the housing when the baffle is mounted therein as seen in Figure 1.
The baffle of the present invention also comprises deflecting means 28 which as seen in Figures 1, 2 and 4 has a generall~- J-shape in longitudinal cross-section. The deflecting means includes a first generally flat portion 30 and a second generally curved portion 32 which interconnects the first portion and the mounting means.
Figures 1 and 4 illustrate a property of the present invention which aids in its effectiveness and that is the orientation of the first portion 30 relative to the mounting means 20 or the housing 12. The planes 34 and 36 -. - ~
~ ~; ,.~ . . .
~0~3~1 containing the ~irst portion 30 and the mounting flange 22 respectively converge at an angle of convergence ~ which may bc of the order of 3 to 4~. T~is has the effect of placing the first portion at an angle wlth respcct to the flow path F, other than at 90, so as to direct incoming air towards the curved portion, upwardly as in Figure 4 The direction of convergence may be defined as from the curved portion 32 longitudinally towards the free edge 38 of the first portion.
Adjacent the free end 38 of the first portion is a section 40 which is angled with respect to the flow path and the plane 36 at a greater angle ~ than the angle . In fact the angle ~ may be of the order of 33 to 34, preferably 33 1/2. Each side edge of the first portion 30 and the curved portion 32 is curved inwardly oF the baffle as seen at 42 in Figures 2, 3 and 5. The curved side edges 42 and the angled section 40 aid in air control and ~`
also add rigidity to the baffle.
~~aving described the basic structure of the present invention, its operation in a vacuum cleaner will be described hereinbelow. As seen in Figure 1 the baffle is connected to the inside surface of the housing 12 with the mounting means 20 adjacent the inlet opening 16 and the first por-tion 30 of the deflecting means 28 extending generally transversely of the flow path F. Needless to say the width of the baffle is greater than that of the flow path F.
Also, the preferred, but not essential, orientation of the baffle is such that when in place the first portion extends in a downwardly direction. Air entering the vacuum cleaner along the flow path F will strike the first portion 30 and, due to the convergence angle ~, will be deflected in an upward direction, toward the curved portion 32. The curved portion 32 lies outside the boundaries of flow path F and may be an arc of a circle. The air deflected towards the curved portion 32 will thus be directed back towards -- S --rm/
.
.~ ~
the inlct openinc~ 16 ancl this cleflectecl air will strike and intermix with the incoming air in flow path F, creating tur-bulence and almost immediately reducin~ the velocity of the incoming air. This phenomenon occurs continuously, as long as there is air flo~ in the vacuum cleaner. The curved ed~es a2 and the angled section ~0 tend to aid in containing air behind the baffle for slightly longer th~n micJht otherwise occur, thereby increasing the time period during which velocity can be scrubbed from the incominq air. The rapid decrease in air velocity and the turbulence created behind the baffle also results in a rapid drop of dust-and dirt particles from the incomlng air.
The flow paths in the deflector portion are illu-strated in Figure 4. As indicate~ above a portion of the air is directed into the curved portion 32 while another portion is directed downwardly, this "splittin~" of the air flow creating a generally conical dead area located essentially at the center of the incoming flow path. This dead area is further evidence of the mixing and turbulent action in the vicinity of the curved portion 32. The dead area was dis-covered experimentally by coating the inside surface of a baffle with lamp black and directing air flow through the inlet 16, the air carrying light dust particles. The particles impinging on the baffle removed the lamp black from all but a circular area central of the flow path. Heavier particles, of course will, penetrate the dead area and hence a physical cone could not effectively be positioned to replace the dead area. Such heavier particles (eg. wet string) might catch on a solid cone and eventually clog the intake. Absent a 3~ solid cone such particles will penetrate the dead area, strike the baffle and drop directly to the canister bottom.
The advantages of the present invention are particu-larly evident at start-up, especially when there is a layer MR/~ ~..
of dust within thc vacuum cleaner. Because the hi~h speed incoming air is so effectively slowed by the baffle there is little or no disturbance of the initial dust layer and during continued oper~tion the level of agitation within the housing is considerably less than what is achieved when no baffle is used or even when a prior art deflector is used. With prior art deflectors there is hardly any change in air speed; there is a change only in the direction of air flow and this is not sufficient to prevent initial or continued agitation of the dust or dirt within the vacuum cleaner. The present invention is also advantageous because it prolongs the period of effec-tiveness of filters within the vacuum cleaner as thev do not cloq as fast as previously. Also there is less chance of dust leakage as there is little dust s~spended within the confines of the vacuum cleaner which might escape through leaks. These advantages have been illustrated in an experimental unit where~
in a baffle constructed in accordance with the ~resent invention was mounted within a transparent vacuum cleaner housing and a ~ layer of dust~was placed within the housing. When the vacuum cleaner was started there was no discernable agitation of the dust layer and the space above the dust layer was clear. Nith-out the baffle, or with other designs of prior art deflector, there was an almost instantaneous agitation and the space above the dust layer was quickly filled with suspended, swirling dust particles.
Further experiments have been conducted with vacuum cleaners of the wet type. When prior art baf~les, are used, water drawn into the canister undergoes a violent swirl-ing action and the filter becomes very wet above the static water level. With the baffle of the present invention however the water maintains its static level and is not subjected to the violent swirling action. Tests have shown that the filter remains dry above the static water level. Similar tests with MR/~
`
3~3~:~
foam have shown similar, and dramatic results. Instead of the foam billowin~ and filling the canister, and hence clo~ging the filter, it remains in the bottom oE the canister and shows a static level in the same manner as does water. The only imper-fection in a relatively smooth surEace is a slight indentation directly below the baffle where ai.r deflected downwardly dis-places a small quantity of foam at the surface. Needless to say this is a considerable improvement over the results obtain-able with prior art baffles.
It is understood that a person skilled in the art may find alternative configurations or orientations of the present invention which may achieve the desired results and which may not have been described herein. The scope of the present invent,ion is thus to be ascertained by the claims appended hereto.
MR~
Claims (8)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A baffle for a vacuum cleaner comprising mounting means for connecting said baffle within the vacuum cleaner adjacent an inlet opening in a wall thereof, and deflecting means for controlling air flow within the vacuum cleaner, said deflecting means having a generally J-shape in logitudinal cross-section and including a first generally flat portion and a second generally curved portion interconnecting said first portion and said mounting means, whereby when mounted within the vacuum cleaner, said first portion is positioned in front of said inlet opening.
2. A baffle according to claim 1 wherein said first portion and said mounting means lie in planes converging in a direction leading from said curved portion longitudinally towards a free edge of said first portion.
3. A baffle according to claim 2 wherein said first portion and said curved portion have continuous side edges, said side edges being curved inwardly of said baffle.
4. A baffle according to claim 2 or claim 3 wherein a section of said first portion adjacent said free edge lies in a plane converging towards the plane containing said mounting means at an angle or convergence greater than the angle of convergence of the planes containing said first portion and said mounting means.
5. In a vacuum cleaner having a housing and an inlet opening in said housing establishing a flow path for air entering said housing, baffle means for said inlet opening comprising mounting means for connecting said baffle means to said housing adjacent said inlet opening, and deflector means having a generally J-shape in longitudinal cross-section and including a first generally flat portion extending generally transversely of said flow path and a second generally curved portion interconnecting said first portion and said mounting means, said first por-tion being angled longitudinally with respect to said flow path to direct incoming air towards said curved portion, said curved portion lying outside said flow path.
6. The invention of claim 5 wherein said first portion and said curved portion have continuous side edges, said side edges being curved inwardly of said baffle means.
7. The invention of claim 5 or claim 6 wherein said first portion has a free edge connecting said side edges, and a section of said first portion adjacent said free edge is angled more towards said flow path than said first portion.
8. The invention of claim 5 or claim 6 wherein said mounting means includes a plate portion extending from said curved portion and conforming to the shape of said housing adjacent the inlet opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA250,138A CA1043961A (en) | 1976-04-13 | 1976-04-13 | Vacuum cleaner air deflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA250,138A CA1043961A (en) | 1976-04-13 | 1976-04-13 | Vacuum cleaner air deflector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1043961A true CA1043961A (en) | 1978-12-12 |
Family
ID=4105700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA250,138A Expired CA1043961A (en) | 1976-04-13 | 1976-04-13 | Vacuum cleaner air deflector |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1043961A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5735919A (en) * | 1995-12-14 | 1998-04-07 | Suntec System Co., Ltd. | Exhaust gas processing system |
| CN110353558A (en) * | 2018-04-09 | 2019-10-22 | 天佑电器（苏州）有限公司 | A kind of dust catcher |
-
1976
- 1976-04-13 CA CA250,138A patent/CA1043961A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5735919A (en) * | 1995-12-14 | 1998-04-07 | Suntec System Co., Ltd. | Exhaust gas processing system |
| CN110353558A (en) * | 2018-04-09 | 2019-10-22 | 天佑电器（苏州）有限公司 | A kind of dust catcher |
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