CA1206931A - Air cushion receptacle for an air cushion mower - Google Patents
Air cushion receptacle for an air cushion mowerInfo
- Publication number
- CA1206931A CA1206931A CA000415254A CA415254A CA1206931A CA 1206931 A CA1206931 A CA 1206931A CA 000415254 A CA000415254 A CA 000415254A CA 415254 A CA415254 A CA 415254A CA 1206931 A CA1206931 A CA 1206931A
- Authority
- CA
- Canada
- Prior art keywords
- grass
- receptacle
- air cushion
- air
- mower
- 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
- 244000025254 Cannabis sativa Species 0.000 claims abstract description 63
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 241001494496 Leersia Species 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D43/00—Mowers combined with apparatus performing additional operations while mowing
- A01D43/06—Mowers combined with apparatus performing additional operations while mowing with means for collecting, gathering or loading mown material
- A01D43/077—Mowers combined with apparatus performing additional operations while mowing with means for collecting, gathering or loading mown material with auxiliary means, e.g. fans, for transporting the mown crop
- A01D43/0775—Mowers combined with apparatus performing additional operations while mowing with means for collecting, gathering or loading mown material with auxiliary means, e.g. fans, for transporting the mown crop for airborne lawn-mowers
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
- A01D34/695—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis supported by an air cushion
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D2101/00—Lawn-mowers
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Harvester Elements (AREA)
Abstract
ABSTRACT
A grass receptacle for an air cushion lawn mower that is supported wholly or partly by part of the air cushion supporting said lawn mower. The fan in the mower housing throws the cut grass into a rear-mounted receptacle which is provided with holes in its floor whereby the air passes through the holes and forms an air cushion in a chamber below the receptacle for supporting said receptable.
A grass receptacle for an air cushion lawn mower that is supported wholly or partly by part of the air cushion supporting said lawn mower. The fan in the mower housing throws the cut grass into a rear-mounted receptacle which is provided with holes in its floor whereby the air passes through the holes and forms an air cushion in a chamber below the receptacle for supporting said receptable.
Description
''' ~20~931 This invention relates to a detachable grass receptable or bag for an air cushion mower.
Air cushion lawn mowers are known and usually com-prise a hood supporting an electric motor or a combustion engine. The hood is provided with a peripheral, down turned flange. The engine or motor rotates a vertical shaft to which a fan is fastened under the hood, and this fan creates an air cushion under the hood by drawing air from atmosphere through a central hole into the hood. The lower end of the shaft is prov;ded with a blade which cuts the grass. It is also known to provide this type of lawn mowers with a grass collecting receptacle, for example in British Patent , ,,; .
A No. 997~528 and British patent ~ te~Y No. 2,017,475.
The latter patent application shows and describes a device which has proved to work satisfactorily, although the fact that it takes away a part of the air from the air cushion in order to transfer the grass clippings from the area of the blade to the collecting receptacle creates problems.
These problems have been solved by designing the mower with a special shape.
A significant drawback of a mower construction of the type described above is that the weight of the grass in the grass receptacle influences the air cushion unfavor-ably and also unfavorably influences the handling of the mower, in particular when the receptacle is filled with wet grass clippings. This, in turn, means that the collecting capacity of the receptacle will not be very great.
In order to solve this problem the invention proposes that also at least a part of the grass receptacle is supported by an air cushion.
~.
`-` ~206~31 According to a broad aspect of the present invention, there is provided a grass receptacle for an air cushion mower wherein said grass receptacle is at least partially supported by an air cushion, and said grass receptacle has a bottom surface above which grass is collected and below which a chamber is provided, means communicating said grass receptacle with said chamber, means conducting a part of said air cushion through said grass receptacle and said communicating means to said chamber wherein said air cushion is established, said mower being provided with a first peripheral lip, and said chamber having a peripheral wall, the lower part of which forms a second lip, and when the grass receptacle is affixed to said mower it is situated mainly in the same horizontal plane as said corresponding first peripheral lip.
-la-B
-~ ~206~
An embodiment of the invention will now be described by way of example with reference to the accompany-ing drawings of which:
FIG. 1 is a vertical section through a device constructed according to the teachings of the present inven-tion, and FIG. 2 is a bottom plan view of the device.
In the Figures, the reference numeral 10 refers to an air cushion mower, and 11 to a grass collecting receptacle detachably connected to the mower. The mower 10 comprises a hood 12 having an outer peripheral lip 13 and a central inlet opening 14 for air, and also an outlet opening 15 for the cut grass. The outlet opening 15 is, when the mower is used without grass receptacle, covered by a lid 16 which is pivotable about a horizontal axis 17.
The mower is also provided with a motor 18 resting on a support 19 in the center of the inlet opening 14 for air.
The motor shaft supports a fan wheel 20 and a blade 21, which via several spacers 2~ are fastened to the shaft at a desired distnace above ground by means of a bolt 23. At the lower rear part of the hood there is a deflecting plate 24 which functions to direct the air stream and the grass clippings towards the outlet opening 15.
During the rotation of the motor shaft an air cushion is created under the hood by means of the fan wheel 20 which makes the hood float above the ground. At the same time the knife blade 21 rotates, thus cutting off the grass and transporting it by the air stream towards the outlet opening.
~Z06~3~
The fan wheel 20~ in the present embodiment, is a combined axial and radial fan having a circular bottom plate which by a central part is fastened to the motor shaft.
The bottom plate is provided with several vertical radial fan blades covered by an annular wall, the bottom plate, the wall and the blades together forming a radial fan. The peripheral part of the annular wall supports a number of axial fan blades running in the inlet opening 14. Cooling air is drawn through the motor by the radial fan blades, and this air is forced into the cushion together with air drawn into the cushion by the axial fan blades through the opening 14.
The grass receptacle 11, as shown in the present embodiment of a bag 25, which is of flexible material and has an inlet opening 26 surrounded by a stiff part for connection and locking to the outlet opening 15 of the mower.
The bag 25 has a horizontal surface 27 which is attached to a lower rigid part 28 that is provided with a lip 29, which Ls similar to the peripheral lip 13 of the mower.
The lip 29 extends along three of the four sides of the bag.
When the bag is connected to the mower a chamber 30 is formed below the horizontal surface 27 and between the rear lip part of the mowr and the lip 29 of the lower part 28 of the grass bag. The horizontal surface 27 is provided with a plurality of spaced holes or slots 31 making it possible for air to pass from the grass bag into the chamber 30.
The mower, in the usual way, is provided with a handle and a cover for the motor (not shown).
The present air cushion mower and grass receptacle operate in the following way.
~ZOf~931 During rotation of the motor shaft grass is thrown into the grass bag by means of the rotating blade 21, and this throwing effect is improved by air which is pumped into the hood 12 through the inlet opening 14 by the fan wheel, thereby taking up the grass being cut by the blade 21 and transferring it through the outlet opening 15 into the grass bag 25. In the grass bag, the air stream is propelled down-wardly and passes through the holes 31 into the chamber 30, leaving the grass clippings to remain on the horizontal surface 27. Simultaneously, air leaving the hood under the rear part of the lip 13 is transferred into the air cushion for the grass bag. Thus, in the chamber 30, an air cushion is created which maintains the grass bag floating together with the mower. When the grass bag is successively filled with grass clippings, the holes 31 in the horizontal surface 27 are obstructed, thus preventing air coming from the air cushion together with grass clippings to reach the chamber 30. Thus, the air cushion under the grass bag is then mainly created by the flow of air coming from the rear part of the lip 13.
It is, of course, possible to use other types of grass receptacles, for example, a container of rigid material, and to use other arrangements in the lower part 28 of the receptacle, for example a hinged, flexible, or an articulating element. It is also possible to provide the upper part of the grass receptacle with openings through which air leaves to atmosphere in order to improve the transport of grass clippings to the receptacle when the holes in the bottom of the receptacle have been obstructed, although such a leakage negatively affects the air cushion.
~z0693~
While partlcular embodiments of the invention are herein illustrated and described, it will be understood that changes may be made in the construction and arrangement of elements without departing from the spirit or scope of the invention. Therefore, without limitation in this respect, the invention is defined by the following claims.
.~
Air cushion lawn mowers are known and usually com-prise a hood supporting an electric motor or a combustion engine. The hood is provided with a peripheral, down turned flange. The engine or motor rotates a vertical shaft to which a fan is fastened under the hood, and this fan creates an air cushion under the hood by drawing air from atmosphere through a central hole into the hood. The lower end of the shaft is prov;ded with a blade which cuts the grass. It is also known to provide this type of lawn mowers with a grass collecting receptacle, for example in British Patent , ,,; .
A No. 997~528 and British patent ~ te~Y No. 2,017,475.
The latter patent application shows and describes a device which has proved to work satisfactorily, although the fact that it takes away a part of the air from the air cushion in order to transfer the grass clippings from the area of the blade to the collecting receptacle creates problems.
These problems have been solved by designing the mower with a special shape.
A significant drawback of a mower construction of the type described above is that the weight of the grass in the grass receptacle influences the air cushion unfavor-ably and also unfavorably influences the handling of the mower, in particular when the receptacle is filled with wet grass clippings. This, in turn, means that the collecting capacity of the receptacle will not be very great.
In order to solve this problem the invention proposes that also at least a part of the grass receptacle is supported by an air cushion.
~.
`-` ~206~31 According to a broad aspect of the present invention, there is provided a grass receptacle for an air cushion mower wherein said grass receptacle is at least partially supported by an air cushion, and said grass receptacle has a bottom surface above which grass is collected and below which a chamber is provided, means communicating said grass receptacle with said chamber, means conducting a part of said air cushion through said grass receptacle and said communicating means to said chamber wherein said air cushion is established, said mower being provided with a first peripheral lip, and said chamber having a peripheral wall, the lower part of which forms a second lip, and when the grass receptacle is affixed to said mower it is situated mainly in the same horizontal plane as said corresponding first peripheral lip.
-la-B
-~ ~206~
An embodiment of the invention will now be described by way of example with reference to the accompany-ing drawings of which:
FIG. 1 is a vertical section through a device constructed according to the teachings of the present inven-tion, and FIG. 2 is a bottom plan view of the device.
In the Figures, the reference numeral 10 refers to an air cushion mower, and 11 to a grass collecting receptacle detachably connected to the mower. The mower 10 comprises a hood 12 having an outer peripheral lip 13 and a central inlet opening 14 for air, and also an outlet opening 15 for the cut grass. The outlet opening 15 is, when the mower is used without grass receptacle, covered by a lid 16 which is pivotable about a horizontal axis 17.
The mower is also provided with a motor 18 resting on a support 19 in the center of the inlet opening 14 for air.
The motor shaft supports a fan wheel 20 and a blade 21, which via several spacers 2~ are fastened to the shaft at a desired distnace above ground by means of a bolt 23. At the lower rear part of the hood there is a deflecting plate 24 which functions to direct the air stream and the grass clippings towards the outlet opening 15.
During the rotation of the motor shaft an air cushion is created under the hood by means of the fan wheel 20 which makes the hood float above the ground. At the same time the knife blade 21 rotates, thus cutting off the grass and transporting it by the air stream towards the outlet opening.
~Z06~3~
The fan wheel 20~ in the present embodiment, is a combined axial and radial fan having a circular bottom plate which by a central part is fastened to the motor shaft.
The bottom plate is provided with several vertical radial fan blades covered by an annular wall, the bottom plate, the wall and the blades together forming a radial fan. The peripheral part of the annular wall supports a number of axial fan blades running in the inlet opening 14. Cooling air is drawn through the motor by the radial fan blades, and this air is forced into the cushion together with air drawn into the cushion by the axial fan blades through the opening 14.
The grass receptacle 11, as shown in the present embodiment of a bag 25, which is of flexible material and has an inlet opening 26 surrounded by a stiff part for connection and locking to the outlet opening 15 of the mower.
The bag 25 has a horizontal surface 27 which is attached to a lower rigid part 28 that is provided with a lip 29, which Ls similar to the peripheral lip 13 of the mower.
The lip 29 extends along three of the four sides of the bag.
When the bag is connected to the mower a chamber 30 is formed below the horizontal surface 27 and between the rear lip part of the mowr and the lip 29 of the lower part 28 of the grass bag. The horizontal surface 27 is provided with a plurality of spaced holes or slots 31 making it possible for air to pass from the grass bag into the chamber 30.
The mower, in the usual way, is provided with a handle and a cover for the motor (not shown).
The present air cushion mower and grass receptacle operate in the following way.
~ZOf~931 During rotation of the motor shaft grass is thrown into the grass bag by means of the rotating blade 21, and this throwing effect is improved by air which is pumped into the hood 12 through the inlet opening 14 by the fan wheel, thereby taking up the grass being cut by the blade 21 and transferring it through the outlet opening 15 into the grass bag 25. In the grass bag, the air stream is propelled down-wardly and passes through the holes 31 into the chamber 30, leaving the grass clippings to remain on the horizontal surface 27. Simultaneously, air leaving the hood under the rear part of the lip 13 is transferred into the air cushion for the grass bag. Thus, in the chamber 30, an air cushion is created which maintains the grass bag floating together with the mower. When the grass bag is successively filled with grass clippings, the holes 31 in the horizontal surface 27 are obstructed, thus preventing air coming from the air cushion together with grass clippings to reach the chamber 30. Thus, the air cushion under the grass bag is then mainly created by the flow of air coming from the rear part of the lip 13.
It is, of course, possible to use other types of grass receptacles, for example, a container of rigid material, and to use other arrangements in the lower part 28 of the receptacle, for example a hinged, flexible, or an articulating element. It is also possible to provide the upper part of the grass receptacle with openings through which air leaves to atmosphere in order to improve the transport of grass clippings to the receptacle when the holes in the bottom of the receptacle have been obstructed, although such a leakage negatively affects the air cushion.
~z0693~
While partlcular embodiments of the invention are herein illustrated and described, it will be understood that changes may be made in the construction and arrangement of elements without departing from the spirit or scope of the invention. Therefore, without limitation in this respect, the invention is defined by the following claims.
.~
Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED AS DEFINED AS FOLLOWS:
1. A grass receptacle for an air cushion mower wherein said grass receptacle is at least partially supported by an air cushion, and said grass receptacle has a bottom surface above which grass is collected and below which a chamber is provided, means communicating said grass receptacle with said chamber, means conducting a part of said air cushion through said grass receptacle and said communicating means to said chamber wherein said air cushion is established, said mower being provided with a first peripheral lip, and said chamber having a peripheral wall, the lower part of which forms a second lip, and when the grass receptacle is affixed to said mower it is situated mainly in the same horizontal plane as said corresponding first peripheral lip.
2. A grass receptacle as claimed in claim 1 wherein the air cushion of the grass receptacle is created by air coming from the air cushion of the mower.
3. A grass receptacle as claimed in claim 2 wherein the air for the air cushion of the grass receptacle also transfers the grass into the receptacle.
4. A grass receptacle as claimed in claim 1 wherein the peripheral wall of said chamber is rigid.
5. A grass receptacle as claimed in claim 1 wherein the upper part of the peripheral wall is provided with a substantially horizontally disposed apertured grating on which the grass clippings are collected.
6. A grass receptacle as claimed in claim 1 wherein the part of the grass receptacle situated above the lower peripheral wall is made of flexible material.
7. A grass receptacle as claimed in claim 5 further comprising a substantially vertical opening in the upper part of said grass receptacle and wherein the air is transferred from the mower to the grass receptacle through said vertical opening in which part of the grass is separated and the main part of the air is led downwards through operning in said apertured grating and to the air cushion under the grass receptacle from which it escapes to the atmosphere.
8. A grass receptacle as claimed in claim 1 wherein the mower is provided with a combined radial and axial fan wheel for establishing the air cushion.
9. A grass receptacle as claimed in claim 8 wherein the radial fan wheel part draws cooling air for the motor into the air cushion whereas the axial fan wheel part draws air directly from the atmosphere to the air cushion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8106702A SE428749B (en) | 1981-11-11 | 1981-11-11 | AIR CUSHION GRASS CONTAINER FOR AN AIR CUSHION CUTTER |
| SE8106702-7 | 1981-11-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1206931A true CA1206931A (en) | 1986-07-02 |
Family
ID=20345017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000415254A Expired CA1206931A (en) | 1981-11-11 | 1982-11-10 | Air cushion receptacle for an air cushion mower |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5889112A (en) |
| CA (1) | CA1206931A (en) |
| DE (1) | DE3239205A1 (en) |
| FR (1) | FR2515924B1 (en) |
| GB (1) | GB2108815B (en) |
| SE (1) | SE428749B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6041077Y2 (en) * | 1980-08-22 | 1985-12-12 | 本田技研工業株式会社 | Lawn mower cuttings discharge guide attachment device |
| JPS6031222U (en) * | 1983-08-09 | 1985-03-02 | 本田技研工業株式会社 | lawn mower housing structure |
| GB9503259D0 (en) * | 1995-02-20 | 1995-04-12 | Atco Qualcast Ltd | Lawnmowers |
| GB2318966B (en) * | 1996-11-05 | 2000-12-27 | Electrolux Outdoor Prod Ltd | A lawnmower |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB997528A (en) * | 1964-06-20 | 1965-07-07 | Flymo Ab | Improvements in lawn mowers |
| GB1178939A (en) * | 1968-11-21 | 1970-01-21 | Flymo Sa | A Device for Use in Manually Moving and Steering an Air-Supportable Lawn Mower |
| GB1448539A (en) * | 1974-11-29 | 1976-09-08 | Flymo Sa | Rotary-scythe lawn mower with means for generating a cushion of air |
| SE7901767L (en) * | 1978-03-13 | 1979-09-14 | Flymo Sa | LAWNMOWER |
| DE2811192A1 (en) * | 1978-03-15 | 1979-10-04 | Assche Viktor Maria Van | Grass box for sickle lawn mower - has mesh in front of louvre type slots to allow exhaust of air |
| ATE5225T1 (en) * | 1980-04-15 | 1983-11-15 | Flymo Limited | COLLECTING ACCESSORIES FOR AN AIR CUSHION SUPPORTED LAWNMOWER. |
-
1981
- 1981-11-11 SE SE8106702A patent/SE428749B/en not_active IP Right Cessation
-
1982
- 1982-10-22 DE DE19823239205 patent/DE3239205A1/en active Granted
- 1982-10-29 GB GB08230940A patent/GB2108815B/en not_active Expired
- 1982-11-10 CA CA000415254A patent/CA1206931A/en not_active Expired
- 1982-11-10 FR FR8218897A patent/FR2515924B1/en not_active Expired
- 1982-11-11 JP JP57196865A patent/JPS5889112A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2515924B1 (en) | 1985-07-19 |
| DE3239205C2 (en) | 1988-11-03 |
| DE3239205A1 (en) | 1983-05-19 |
| GB2108815A (en) | 1983-05-25 |
| JPS5889112A (en) | 1983-05-27 |
| SE428749B (en) | 1983-07-25 |
| GB2108815B (en) | 1985-10-16 |
| SE8106702L (en) | 1983-05-12 |
| JPH0372242B2 (en) | 1991-11-18 |
| FR2515924A1 (en) | 1983-05-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |