CA2125956A1 - Suction lawn mower with sucking air flow generator - Google Patents
Suction lawn mower with sucking air flow generatorInfo
- Publication number
- CA2125956A1 CA2125956A1 CA002125956A CA2125956A CA2125956A1 CA 2125956 A1 CA2125956 A1 CA 2125956A1 CA 002125956 A CA002125956 A CA 002125956A CA 2125956 A CA2125956 A CA 2125956A CA 2125956 A1 CA2125956 A1 CA 2125956A1
- Authority
- CA
- Canada
- Prior art keywords
- mower
- vacuum
- grass
- intake opening
- motor
- 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
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/001—Accessories not otherwise provided for
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/835—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes
- A01D34/84—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes for edges of lawns or fields, e.g. for mowing close to trees or walls
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/06—Hand-held edge trimmers or shears for lawns
- A01G3/062—Motor-driven edge trimmers
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D2101/00—Lawn-mowers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Harvester Elements (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A suction lawn mower has a sucking air flow generator for sucking-in grass blades through an inlet arranged in the housing. The inlet is oriented at an adjustable angle of up to 80° in relation to the normal growth direction of the grass blades, ensuring an in-depth action of the sucking air flow and allowing grass blades especially in the area of walls, tree trunks and posts on the roadside to be sucked-in and cut down. The invention may be used as an appliance in itself or as an accessory appliance for conventional lawn mowers.
A suction lawn mower has a sucking air flow generator for sucking-in grass blades through an inlet arranged in the housing. The inlet is oriented at an adjustable angle of up to 80° in relation to the normal growth direction of the grass blades, ensuring an in-depth action of the sucking air flow and allowing grass blades especially in the area of walls, tree trunks and posts on the roadside to be sucked-in and cut down. The invention may be used as an appliance in itself or as an accessory appliance for conventional lawn mowers.
Description
~ 2i25~6 Vacuum Mower with a device for Creating a Suction Air Stream This invention concerns a vacuum mower according to the general terms of claim 1. By vacuum mower are understood all grass mowing devices that use an air stream, in whichever way, to support the mowing process. Vacuum mowers are conventional mowing devices, as eg. the ones in DE B1 2643604 DE B1 shows a suction tube with an opening for the intake as well as one for the exhaust with a suction/blowing device which is able to suck the grass into the casing. According to DE B1 the device, contrary to other conventional mowers with rotating blades that operate parallel to the ground as, for example the US A
4718221, has the advantage that the angle between the opening for the intake and the direction of the growth of the grass can be altered. The mowing device for cutting the stems of the grass may be placed in front of the opening for the intake in the shape of a chaff cutting cylinder within a suction bell (column 1, lines 60-64), but it may also be built into the device directly at the intake in the form of a nozzle sucking up the grass (column 3, lines 63-64).
Chaff cutting cylinders are unshapely cylinders with a large number of cutting blades which are used only for a special mowing process of large areas. Their drives though, are heavy and cylinders serve for cutting the grass into small pieces rather than for cutting it off neatly. Placing the cutting --device at one end of the suction tube while the other is mounted on a vehicle held above the ground by wheels, regardless of the contour of the ground below the cutting device, makes the construction somewhat difficult if you want to cut the grass at always the same height above the ground.
The suction tube is rarely used for cutting grass on uneven terrain because it was mainly constructed for cutting bushes and shrubs at the side of the road, respectively for cutting grass on ground sloping down to the road. Such known devices are less suitable for universal use in gardens, parks or, for example golf courses.
212~9~ 6 The main purpose of the invention is to devise a simple vacuum mower for universal use that can mow grass at an angle to the vertical as can chaff cutting cylinders, so that, for example, also the edges of an even meadow that do not lie directly below the mower can be trimmed, the mower following by itself the contour of the ground below. -This task is essentially achieved by combining the following(see claim 1):
A device for always maintaining the same distance from the ground (e.g. in accordance with US A 5020309) - ~
Placing the intake opening at an angle (as in DE Bl 2643604) and Use of a device creating a vacuum strong enough to bend and suck grass from around the intake opening into the casing so that it may be cut there.
The invention may be used independently or in combination with conventional lawn mowers, particularly to remowe grass from -~ ~;
the areas next to stable obstacles in the best way possible~
Because of this, trimming these areas by hand or with hand-held cutting devices after the use of the mower can become unnecessary.
, This also has the special advantage of approaching the grass that has to be cut from the side without directly touching it.
With this invention the grass, so to speak, moves towards the mowing device whereas with the conventional lawn mowers, as for example according to US A, the mowing device has to be moved towards the grass, respectively must be put on top of it. A further result is a relatively low wear of the mowing equipment, but in particular a protection of bushes, bark of trees, facades, etc. because these will come in contact with only the vacuum stream during the mowing procedure and will not automatically be engaged and cut or at least damaged as is the case with conventional chaff cutting devices.
By preferrential design of the cutting tool according to claim 5 2, either the vacuum generator or a separate drive for the ~
cutting tool can-be omitted (possibility according to claim ~-3).
Though with some conventional lawn mowers attachments lo resembling ventilators are known to exist, these serve to collect the cut grass for example in a bag or to maintain a steady distance from the ground without using a wheel, by creating a sort of an air cushion. The sucking in of the grass at an angle different from the direction of the growth of the lS grass as is the case in the concept according to DE Bl however is impossible.
The lawn mower described in US A 5020309 also has an additional ventilator in the grass discharge conduit in order 20 to discharge cut blades of grass from the mower and to perhaps `
shred them. This mower can follow contours of the ground well, due to its wheels, but cannot cut grass at the edges or around trees, next to waIls, etc. in a satisfactory manner because this grass - as with all other conventional mowers - is not grabbed and therefore not cut either. For the grass growing in such spots, special cutting devices such as weed eaters, trimmers and hedgers have been designed, which will be rendered obsolete by this invention.
Thus conventional lawn mowers, with blades that create an air stream, differ only slightly from other lawn mowers - at least in regard to their capability to engage and grab blades of grass etc. close to walls, tree trunks, roots, bushes, fences, poles along roads, etc. For cutting off of grass close to such more or less stable obstacles, conventional lawn mowers (with the exception of motor scythes) can hardly be used. For one wheels, protective parts and other parts of the frame of the lawn mower are not allowed to get close to said obstacles and, 2125'g.5'~
in addition mowing around posts along the side of roads is often cumbersome and impeded by buildings.
In these cases the suction effect of conventional lawn mowers is practically useless because the area where they can effectively be used is hardly larger than the one lying directly under the mower. Further characteristics and details as well as various types of the invention are described in the relevant claims.
m e different ways of using the invention have the following advantages~
At an angle of application of not more than 80 degrees, the ~ -suction power reaches beyond the area of the lawn mower proper and may suck in and cut off for example small grass blades, bushes, etc. in a direction about parallel to the ground. By standard direction of growth essentially a vertical direction to the ground is unders~ood. Above all, longer blades of grass whose stem is relatively thick close to the ground are cought by the invention at the top where they can still be easily bent, and be pulled into the lawn mower where they are cut off.
The smaller the angle of application, the closer it is to 0 degrees, the stronger is the vertical effect on the ground with the lawn mower of this invention. So, for example even grass blades around a roadside pole can at the same time be pulled in by the vacuum stream and be cut off. Mowing around such a pole thus is not necessary. Practical application shows that the resulting small differences in the length of the cut stems of grass are tolerable.
Mounting the invention on a conventional lawn mower results in an advantageous combination with which grass can be successfully cut wherever it may grow. In addition, it is possible to pick up leaves, etc. as with a vacuum cleaner for which purpose a detachable suction bell may be provided.
212S9~6 - .
The exact spot where on a conventional lawn mower the invention may be mounted can be freely chosen. One may paritcularly choose to place it between the front or the back wheels. The invention may also be completely integrated into the casing of the lawn mower. In that case, placing it in the area of the felloe of the wheels provides a particularly elegant and compact solution.
Mounting the invention on a cutting device with open blades results in an even more flexible use in the niches in walls, etc. in which case especially the suction effect turns out to be an asset in supporting the mowing process.
The use of a tubular casing complies with the rules of the use of rotating blades and devices for the creation of an air stream (e.g. ventilator blades). In that case the discharge opening is designed so that on the one hand the cut off grass is discharged in the best way possible and on the other hand there is no contact with rotating parts on the discharge side of the machine.
Of course other blades or air stream creating devices as, for example the radial cylindric blower type, lie within the scope 2S of the invention.
A device to protect direct touch of the intake opening prevents the intake of stronger bushes which are not meant to be cut, as well as injuries of hands or pets.
The variant with a friction clutch increases the safety of the ;~ -device and prevents the killing of the respective motor.
The design according to claim 2 in one piece is very compact and has only few individual parts. The adjustable cover of the intake opening makes it possible to regulate the power of the air stream and protects the rotating blades.
. ~
~` 21259~
The safety i8 further increased by the measures of claim 10.
The type according to claim 3 is a design without a separate motor for the cutting device and at the same time has-a friction clutch effect at the cutting part. There the cutting apparatus has to be in relative proportion with the diameter of the suction tube as well as with the force of the air stream. This solution provides the advantage of separating the motor generating the air stream from the area where the grass is cut. Placing this mowing device in the suction nozzle in accordance with DE Bl would be feasible.
The invention is further explained by the enclosed drawings, which show in Fig.l and 2 the invention attached to a conventional lawn mower;
Fig.3 and 4 a suction mower (vacuum mower) using the invention as may be the case with motor scythes;
Fig.S and 6 a device for mowing edges of roads; and Fig.7 a detail of the attachement of the invention to a conventional lawn mower being used to mow around a roadside post.
The drawings are described in context and in an overall way.
Same parts are marked by same symbols, similar parts show same symbols but are indexed differently.
The invention is best used for the mowing of grass along walls and fences and around trees, bushes, roadside posts 1 etc. By obliquely adjusting the intake opening 16 (fig.3) grass 14 is pulled vertically into the intake opening 16 and is cut there by a cutting device 7. A casing 6 built around the cutting -device 7 is designed for either the axial discharge of the grass (6a according to fig.1-4 and 7) or for the radial -~
discharge of the grass (6b according to fig.5 and 6).
~125'9~;6 940609PC26dl - 7 -Attaching a vacuum mower as in the invention to a conventional lawn mower 3a (fig.1 and 2) is best used for mowing larger areas and only in second place in removing grass 14 close to walls 1. In that case a conventional lawn mower 3a is-slid or pushed - as usual - over the mower by means of a sliding guide 2a.
The casing 6a is mounted in such a manner that the intake opening 16 can be positioned close to the wall 1. Mounting is by fitting 5 which is adjustable and slides into desired position so that the mower can be adjusted as conditions may require.
~y such a fitting, particularly 5, the angle of the intake opening too may be adjusted.
In the case of fig.1 and 2 the power from the motor of the conventional lawn ~ower 3a is transmitted to the vacuum mower as in the invention by a belt or a flexible shaft 4a. In the other cases, the power is generated by a motor 4b driven by combustion, electrically or hydraulically or by a vacuum air current, etc.
The intake opening 16 is protected against direct contact by a protective grill 8, so tha~ voluminous objects can be kept away from the cutting device.
The type in fig.5 and 6 is a special design for mowing close to road edges, walls, fences, etc. There the discharge opening ; -17b goes into a bagging device or into a basket. Through a removable covering 9 the diameter of the intake opening 16 can be varied in order to regulate the suction power. The intake opening may be rotated around a rotation point 10. Within the frame of the invention lie also other types of covers such as sliding metal plates, etc.
212~9~
The type for mowing road edges 3b can be pushed on wheels 12, -the height of which is adjustable. It can be directed by push ~ -~
bars 2b.
The type according to fig.7 shows the assembly of a lawn mower with the vacuum mower attached according to the invention for mowing relatively large areas 14 at the edges of roads 15 respectively next to the road surface itself 13. Contrary to the type as according to fig.1 and 2 such a vacuum mower has lo its own, for example hydraulic motor 4b which, for example allows for the regulation of the vacuum power by the speed of rotation. Such devices are, for example frequently mounted on communal riding mowers. The fixing 5 may, for example be adjusted or hydraulically turned along the arc marked by points and dashes around the lawn mower 3b. By doing this all possible special situations at a given edge of a road can be met. An elegant solution can be seen in fig.3 where the intake opening has been integrated in a wheel 12a.
Special safety devices to reduce the danger of injuries of the user, of animals, etc. respectively to protect the blades (in case of the use of an idling device) are not shown in the drawings but may be provided as described in the claims. The invention may also be used to its advantage as a blower or for collecting fallen leaves. In the first case a device for the reversion of the sense of rotation can be installed. If the discharge opening of the case of the cutting device leads to the mower deck of a lawn mower as shown in the drawing, there .
is the additional advantage of the grass being shreded once more and is at any rate taken through the mower to, for example a bagging device or grass collection basket.
21 2~95 G
940609PC2~01 - 9 -List of Symbols 1. Wall, tree, bush, garden fence, roadside posts 2a. Guiderail to mount mower 2b. Push bars 3a. Lawn mower or æimilar device 3b. Device for mowing road edges 4a. Transmission by belt, flexible shaft, etc.
5. Fixing (adjustable or sliding in all directions) 6a. Casing for axial discharge 6b. Casing for radial discharge 7a. Ventilator (blades) including cutting device for axial discharge 7b. Ventilator (blades) including cutting device for lS radial discharge 8. Protection grill 9. Adjustable cover (for less suction or greater safety) 10. Pivot for cover 11. Collection bag or basket 12,12a. One or several wheels the height of which can be adjusted 13. Road surface 14. Grass 15. Road edge 16. Intake (opening) 17a,b. Discharge (opening) ~ ;
4718221, has the advantage that the angle between the opening for the intake and the direction of the growth of the grass can be altered. The mowing device for cutting the stems of the grass may be placed in front of the opening for the intake in the shape of a chaff cutting cylinder within a suction bell (column 1, lines 60-64), but it may also be built into the device directly at the intake in the form of a nozzle sucking up the grass (column 3, lines 63-64).
Chaff cutting cylinders are unshapely cylinders with a large number of cutting blades which are used only for a special mowing process of large areas. Their drives though, are heavy and cylinders serve for cutting the grass into small pieces rather than for cutting it off neatly. Placing the cutting --device at one end of the suction tube while the other is mounted on a vehicle held above the ground by wheels, regardless of the contour of the ground below the cutting device, makes the construction somewhat difficult if you want to cut the grass at always the same height above the ground.
The suction tube is rarely used for cutting grass on uneven terrain because it was mainly constructed for cutting bushes and shrubs at the side of the road, respectively for cutting grass on ground sloping down to the road. Such known devices are less suitable for universal use in gardens, parks or, for example golf courses.
212~9~ 6 The main purpose of the invention is to devise a simple vacuum mower for universal use that can mow grass at an angle to the vertical as can chaff cutting cylinders, so that, for example, also the edges of an even meadow that do not lie directly below the mower can be trimmed, the mower following by itself the contour of the ground below. -This task is essentially achieved by combining the following(see claim 1):
A device for always maintaining the same distance from the ground (e.g. in accordance with US A 5020309) - ~
Placing the intake opening at an angle (as in DE Bl 2643604) and Use of a device creating a vacuum strong enough to bend and suck grass from around the intake opening into the casing so that it may be cut there.
The invention may be used independently or in combination with conventional lawn mowers, particularly to remowe grass from -~ ~;
the areas next to stable obstacles in the best way possible~
Because of this, trimming these areas by hand or with hand-held cutting devices after the use of the mower can become unnecessary.
, This also has the special advantage of approaching the grass that has to be cut from the side without directly touching it.
With this invention the grass, so to speak, moves towards the mowing device whereas with the conventional lawn mowers, as for example according to US A, the mowing device has to be moved towards the grass, respectively must be put on top of it. A further result is a relatively low wear of the mowing equipment, but in particular a protection of bushes, bark of trees, facades, etc. because these will come in contact with only the vacuum stream during the mowing procedure and will not automatically be engaged and cut or at least damaged as is the case with conventional chaff cutting devices.
By preferrential design of the cutting tool according to claim 5 2, either the vacuum generator or a separate drive for the ~
cutting tool can-be omitted (possibility according to claim ~-3).
Though with some conventional lawn mowers attachments lo resembling ventilators are known to exist, these serve to collect the cut grass for example in a bag or to maintain a steady distance from the ground without using a wheel, by creating a sort of an air cushion. The sucking in of the grass at an angle different from the direction of the growth of the lS grass as is the case in the concept according to DE Bl however is impossible.
The lawn mower described in US A 5020309 also has an additional ventilator in the grass discharge conduit in order 20 to discharge cut blades of grass from the mower and to perhaps `
shred them. This mower can follow contours of the ground well, due to its wheels, but cannot cut grass at the edges or around trees, next to waIls, etc. in a satisfactory manner because this grass - as with all other conventional mowers - is not grabbed and therefore not cut either. For the grass growing in such spots, special cutting devices such as weed eaters, trimmers and hedgers have been designed, which will be rendered obsolete by this invention.
Thus conventional lawn mowers, with blades that create an air stream, differ only slightly from other lawn mowers - at least in regard to their capability to engage and grab blades of grass etc. close to walls, tree trunks, roots, bushes, fences, poles along roads, etc. For cutting off of grass close to such more or less stable obstacles, conventional lawn mowers (with the exception of motor scythes) can hardly be used. For one wheels, protective parts and other parts of the frame of the lawn mower are not allowed to get close to said obstacles and, 2125'g.5'~
in addition mowing around posts along the side of roads is often cumbersome and impeded by buildings.
In these cases the suction effect of conventional lawn mowers is practically useless because the area where they can effectively be used is hardly larger than the one lying directly under the mower. Further characteristics and details as well as various types of the invention are described in the relevant claims.
m e different ways of using the invention have the following advantages~
At an angle of application of not more than 80 degrees, the ~ -suction power reaches beyond the area of the lawn mower proper and may suck in and cut off for example small grass blades, bushes, etc. in a direction about parallel to the ground. By standard direction of growth essentially a vertical direction to the ground is unders~ood. Above all, longer blades of grass whose stem is relatively thick close to the ground are cought by the invention at the top where they can still be easily bent, and be pulled into the lawn mower where they are cut off.
The smaller the angle of application, the closer it is to 0 degrees, the stronger is the vertical effect on the ground with the lawn mower of this invention. So, for example even grass blades around a roadside pole can at the same time be pulled in by the vacuum stream and be cut off. Mowing around such a pole thus is not necessary. Practical application shows that the resulting small differences in the length of the cut stems of grass are tolerable.
Mounting the invention on a conventional lawn mower results in an advantageous combination with which grass can be successfully cut wherever it may grow. In addition, it is possible to pick up leaves, etc. as with a vacuum cleaner for which purpose a detachable suction bell may be provided.
212S9~6 - .
The exact spot where on a conventional lawn mower the invention may be mounted can be freely chosen. One may paritcularly choose to place it between the front or the back wheels. The invention may also be completely integrated into the casing of the lawn mower. In that case, placing it in the area of the felloe of the wheels provides a particularly elegant and compact solution.
Mounting the invention on a cutting device with open blades results in an even more flexible use in the niches in walls, etc. in which case especially the suction effect turns out to be an asset in supporting the mowing process.
The use of a tubular casing complies with the rules of the use of rotating blades and devices for the creation of an air stream (e.g. ventilator blades). In that case the discharge opening is designed so that on the one hand the cut off grass is discharged in the best way possible and on the other hand there is no contact with rotating parts on the discharge side of the machine.
Of course other blades or air stream creating devices as, for example the radial cylindric blower type, lie within the scope 2S of the invention.
A device to protect direct touch of the intake opening prevents the intake of stronger bushes which are not meant to be cut, as well as injuries of hands or pets.
The variant with a friction clutch increases the safety of the ;~ -device and prevents the killing of the respective motor.
The design according to claim 2 in one piece is very compact and has only few individual parts. The adjustable cover of the intake opening makes it possible to regulate the power of the air stream and protects the rotating blades.
. ~
~` 21259~
The safety i8 further increased by the measures of claim 10.
The type according to claim 3 is a design without a separate motor for the cutting device and at the same time has-a friction clutch effect at the cutting part. There the cutting apparatus has to be in relative proportion with the diameter of the suction tube as well as with the force of the air stream. This solution provides the advantage of separating the motor generating the air stream from the area where the grass is cut. Placing this mowing device in the suction nozzle in accordance with DE Bl would be feasible.
The invention is further explained by the enclosed drawings, which show in Fig.l and 2 the invention attached to a conventional lawn mower;
Fig.3 and 4 a suction mower (vacuum mower) using the invention as may be the case with motor scythes;
Fig.S and 6 a device for mowing edges of roads; and Fig.7 a detail of the attachement of the invention to a conventional lawn mower being used to mow around a roadside post.
The drawings are described in context and in an overall way.
Same parts are marked by same symbols, similar parts show same symbols but are indexed differently.
The invention is best used for the mowing of grass along walls and fences and around trees, bushes, roadside posts 1 etc. By obliquely adjusting the intake opening 16 (fig.3) grass 14 is pulled vertically into the intake opening 16 and is cut there by a cutting device 7. A casing 6 built around the cutting -device 7 is designed for either the axial discharge of the grass (6a according to fig.1-4 and 7) or for the radial -~
discharge of the grass (6b according to fig.5 and 6).
~125'9~;6 940609PC26dl - 7 -Attaching a vacuum mower as in the invention to a conventional lawn mower 3a (fig.1 and 2) is best used for mowing larger areas and only in second place in removing grass 14 close to walls 1. In that case a conventional lawn mower 3a is-slid or pushed - as usual - over the mower by means of a sliding guide 2a.
The casing 6a is mounted in such a manner that the intake opening 16 can be positioned close to the wall 1. Mounting is by fitting 5 which is adjustable and slides into desired position so that the mower can be adjusted as conditions may require.
~y such a fitting, particularly 5, the angle of the intake opening too may be adjusted.
In the case of fig.1 and 2 the power from the motor of the conventional lawn ~ower 3a is transmitted to the vacuum mower as in the invention by a belt or a flexible shaft 4a. In the other cases, the power is generated by a motor 4b driven by combustion, electrically or hydraulically or by a vacuum air current, etc.
The intake opening 16 is protected against direct contact by a protective grill 8, so tha~ voluminous objects can be kept away from the cutting device.
The type in fig.5 and 6 is a special design for mowing close to road edges, walls, fences, etc. There the discharge opening ; -17b goes into a bagging device or into a basket. Through a removable covering 9 the diameter of the intake opening 16 can be varied in order to regulate the suction power. The intake opening may be rotated around a rotation point 10. Within the frame of the invention lie also other types of covers such as sliding metal plates, etc.
212~9~
The type for mowing road edges 3b can be pushed on wheels 12, -the height of which is adjustable. It can be directed by push ~ -~
bars 2b.
The type according to fig.7 shows the assembly of a lawn mower with the vacuum mower attached according to the invention for mowing relatively large areas 14 at the edges of roads 15 respectively next to the road surface itself 13. Contrary to the type as according to fig.1 and 2 such a vacuum mower has lo its own, for example hydraulic motor 4b which, for example allows for the regulation of the vacuum power by the speed of rotation. Such devices are, for example frequently mounted on communal riding mowers. The fixing 5 may, for example be adjusted or hydraulically turned along the arc marked by points and dashes around the lawn mower 3b. By doing this all possible special situations at a given edge of a road can be met. An elegant solution can be seen in fig.3 where the intake opening has been integrated in a wheel 12a.
Special safety devices to reduce the danger of injuries of the user, of animals, etc. respectively to protect the blades (in case of the use of an idling device) are not shown in the drawings but may be provided as described in the claims. The invention may also be used to its advantage as a blower or for collecting fallen leaves. In the first case a device for the reversion of the sense of rotation can be installed. If the discharge opening of the case of the cutting device leads to the mower deck of a lawn mower as shown in the drawing, there .
is the additional advantage of the grass being shreded once more and is at any rate taken through the mower to, for example a bagging device or grass collection basket.
21 2~95 G
940609PC2~01 - 9 -List of Symbols 1. Wall, tree, bush, garden fence, roadside posts 2a. Guiderail to mount mower 2b. Push bars 3a. Lawn mower or æimilar device 3b. Device for mowing road edges 4a. Transmission by belt, flexible shaft, etc.
5. Fixing (adjustable or sliding in all directions) 6a. Casing for axial discharge 6b. Casing for radial discharge 7a. Ventilator (blades) including cutting device for axial discharge 7b. Ventilator (blades) including cutting device for lS radial discharge 8. Protection grill 9. Adjustable cover (for less suction or greater safety) 10. Pivot for cover 11. Collection bag or basket 12,12a. One or several wheels the height of which can be adjusted 13. Road surface 14. Grass 15. Road edge 16. Intake (opening) 17a,b. Discharge (opening) ~ ;
Claims (10)
1. Vacuum mower with case (6) a device for generating an air stream to transport cut off blades of grass (14) within the mower, with an intake opening (16), as well as at least one cutting device immediately behind the intake opening (16) for cutting off the blades of grass, with the cutting device having at least one blade (7), and where in an operating position the minimum distance between the intake opening and the ground is kept by distance means so that in operating mode the intake opening will follow the contour of the ground and with the special feature that the plane as defined by the intake opening (16) in the operating position of the vacuum mower forms an angle of less than 80 degrees with the normal direction of growth of the grass blades (14) and that the device for generating the air stream is powerful enough to make not yet cut grass in around the intake opening (16) bend into it to be cut there.
2. Vacuum mower as in claim 1, wherein the cutting device respectively the blades (7) is part of said device and is mechanically operated and when in operation preferably will create the air stream itself.
3. Vacuum mower as in claim 1, wherein the device for producing a vacuum generated air stream and the blade (7) are positioned in a particular tubular case (6) the knife (7) rotating freely on a bearing and being driven by said air stream.
4. Vacuum mower as in one of the above claims in which the angle of application is less than 20 degrees and/or in which this angle can be varied by a special mechanism.
5. Vacuum mower as in one of the above claims and which is designed to be attached to a conventional motor mower (3) wherein the cutting device (7) and/or the device for producing a vacuum air stream is preferably driven by a belt (4a), a shaft or the like by the motor of the motor mower (3) or by a separate - as for example hydraulic motor - possibly with a friction clutch regulated by the speed of rotation.
6. Vacuum mower as in claim 1 or 2 in which the blade (7) running in a case (6) constitutes the mowing device of a motor scythe (freely movable cutter).
7. Vacuum mower as in one of the above claims in which the casing (6) has an intake opening (16) opposite the discharge opening (17) which when in operation is oriented towards a grass collecting container, towards the case of a lawn mower (3a) or towards the ground.
8. Vacuum mower as in one of the above claims the intake opening (16) of which has an adjustable cover (9) which may be closed completely or is protected by rods (8) or a grill, etc.
9. Vacuum mower as in one of the above claims in which the intake opening (16) is placed in the area of the front or back wheels (12a) of a lawn mower, in particular in the area of the felloe of a wheel and/or the casing (6) has a spiral shape.
10. Vacuum mower as in one of the above claims in which the motor (4) of the cutting device, respectively the blade (7), is linked to a safety device that will kill the motor when lawn mower is not being pushed with both hands and/or which will stop the cutting device (7) as soon as the lawn mower is not being moved forwards or backwards.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH3708/91-7 | 1991-12-16 | ||
| CH370891 | 1991-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2125956A1 true CA2125956A1 (en) | 1993-06-24 |
Family
ID=4261811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002125956A Abandoned CA2125956A1 (en) | 1991-12-16 | 1992-12-16 | Suction lawn mower with sucking air flow generator |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0618765B1 (en) |
| JP (1) | JPH07503610A (en) |
| AT (1) | ATE149786T1 (en) |
| CA (1) | CA2125956A1 (en) |
| CZ (1) | CZ285305B6 (en) |
| DE (1) | DE59208208D1 (en) |
| HU (1) | HUT69896A (en) |
| WO (1) | WO1993011659A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997044998A1 (en) * | 1996-05-29 | 1997-12-04 | International Retail Direct Promotions, Inc. | Apparatus for converting string trimmer to mulcher and vacuum |
| GB2336754A (en) * | 1998-05-01 | 1999-11-03 | Timothy Nelham Clark | Lawn shears with a trough |
| JP2019017330A (en) * | 2017-07-20 | 2019-02-07 | 雅人 伊賀 | Weeding method of weed growing thick in planted tree |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB498393A (en) * | 1937-07-06 | 1939-01-06 | Charles Millington Collins | Improvements in and relating to bracken-cutting machines |
| US2630665A (en) * | 1950-08-03 | 1953-03-10 | George J Lauer | Lawn edger with motor case as the wheel |
| DE2626201A1 (en) * | 1976-06-11 | 1977-12-22 | Stahlschmidt Kg | Safety device for electric lawn mower - consists of two attachments on handle and each containing photoconductive cell and switch |
| DE2643604C2 (en) * | 1976-09-28 | 1982-01-07 | Martin Beilhack Maschinenfabrik Und Hammerwerk Gmbh, 8200 Rosenheim | Suction nozzle for a slope grass mower |
| EP0047416B2 (en) * | 1980-09-04 | 1988-07-27 | Wolf-Geräte GmbH | Safety switch device for an electric lawn mower |
| GB8320578D0 (en) * | 1983-07-29 | 1983-09-01 | Wilson G J | Waste removal unit |
| US4642976A (en) * | 1985-09-20 | 1987-02-17 | Owens Boyd L | Lawn mower trimmer and edger attachment |
| US4718221A (en) * | 1986-05-21 | 1988-01-12 | Wessel Lloyd E | Lawnmower edger and trimmer |
| US4936886A (en) * | 1989-07-12 | 1990-06-26 | Snapper Power Equipment Division Of Fuqua Indistries, Inc. | Wheel mounted string trimmer |
| US5020309A (en) * | 1989-11-08 | 1991-06-04 | Textron, Inc. | Leaf shredder attachment for a mower bagging system |
| WO1991017649A1 (en) * | 1990-05-16 | 1991-11-28 | Frank Rejman | A garden tool |
-
1992
- 1992-12-16 WO PCT/EP1992/002923 patent/WO1993011659A1/en active IP Right Grant
- 1992-12-16 EP EP93900098A patent/EP0618765B1/en not_active Expired - Lifetime
- 1992-12-16 AT AT93900098T patent/ATE149786T1/en not_active IP Right Cessation
- 1992-12-16 DE DE59208208T patent/DE59208208D1/en not_active Expired - Lifetime
- 1992-12-16 CZ CZ941471A patent/CZ285305B6/en not_active IP Right Cessation
- 1992-12-16 JP JP5510633A patent/JPH07503610A/en active Pending
- 1992-12-16 CA CA002125956A patent/CA2125956A1/en not_active Abandoned
- 1992-12-16 HU HU9401785A patent/HUT69896A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| HU9401785D0 (en) | 1994-09-28 |
| JPH07503610A (en) | 1995-04-20 |
| CZ147194A3 (en) | 1995-04-12 |
| EP0618765A1 (en) | 1994-10-12 |
| WO1993011659A1 (en) | 1993-06-24 |
| ATE149786T1 (en) | 1997-03-15 |
| EP0618765B1 (en) | 1997-03-12 |
| CZ285305B6 (en) | 1999-07-14 |
| HUT69896A (en) | 1995-09-28 |
| DE59208208D1 (en) | 1997-04-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |