Classifications

• • 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
  • A01D34/67—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 hand-guided by a walking operator
• • 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
  • A01D34/82—Other details
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01D—HARVESTING; MOWING
  • A01D2101/00—Lawn-mowers

Definitions

• the invention relates to wheeled lawn mowers having a power- 5 operated cutter rotating about a vertical axis of rotation.
• wheels usually four mounted on two axles separated from each other in the driving direction.
• the four wheels makes turning the machine difficult and especially the front pair of wheels constitute upwardly projecting obstacles at the edge of the hood whic7 ⁇ impedes or prevents cutting the
• the machine could be operated in such a manner that one of the pairs of wheels is held at a sufficiently
• the cut grass is apt to spread over paths and so called grass reinforcements, and this grass is apt to adhere to shoe soles to be carried into houses and apartments. If the lawn mower is not provided with a receptacle the cut grass tends to collect in bundles or wads.
• Ihe object of the invention is a lawn mower with a power-operated cutter rotating about a vertical axis and which does not have the above drawbacks.
• the lawn mower of the invention is to be of low weight (less than 10 kg), it shall make possible optimum accessability around bushes, trees, fence posts, under fences and along house walls, palings etc. It shall be easily turnable and it shall cut the grass completely and without scalping the lawn also along lawn edges.
• FIG. 1 is a side elevational view of a first embodiment of the lawn mower according to the invention
• FIG. 2 is a side elevational view showing primarily the cutter hood of the machine of Fig. 1, the right wheel, with respect to the intended driving direction, being removed to show details
• FIG. 3 is a top plan view of the cutter hood and portions adjacent thereto
• FIG. 4 is a rear view of the cutter hood and portions adjacent thereto
• FIG. 5 is a view similar to Fig. 2, the side of the cutter hood next to the view being cut away to show the rotating cutter and to more clearly show the support member,
• FIG. 6 is a bottom view of the cutter hood and portions adjacent thereto
• FIG. 7 is a bottom view of a second embodiment of the lawn mower according to the invention.
• FIG. 8 is a bottom view of a third ⁇ ribodiment.
• the embodiment of the lawn mower of the invention shown in Figs. 1-6 comprises one single wheel axle 1 which with respect to the driving direction is positioned rearwardly of the protecting hood 2 of the rotating cutter 3.
• This disposal of wheel axle 1 permits a short axle so that wheels 4 can be disposed relatively close to each other, specifically close enough to permit rotating cutter 3 to have larger effective diameter than the distance between the exterior sides of wheels 4.
• This together with the fact that the lawn mower has no front pair of wheels means for one thing that the machine is very easily turned during driving and for another that no wheels will be running in uncut grass, and therefore the grass will nowhere be flattened before being cut, this in its turn involving that the mower according to the invention will leave no strips of uncut or imperfectly cut grass.
• a sliding member 5 directly or indirectly attached to wheel axle 1 and adapted to engage the ground when the machine is being driven.
• Member 5 extends at least forwardly from the wheel axle and in a plane which is substantially parallel with the plane of rotation of cutter 3, beyond the centre of rotation of cutter 3 and, with the machine in the position of use, substantially vertically below said centre of rotation and further somewhat forwardly in the vertical median plane, preferably, however, no farther than to a point somewhat inside cutter hood 2.
• Support member 5 may be a tube or other section member.
• a sliding member 6 At the front end thereof there is attached to its underside a sliding member 6 in the form of a relatively thin and preferably downwardly somewhat tapering plate, preferably circular and of a relatively wear resistant material and capable of sliding with reasonably little resistance.
• Support member 5 and its sliding member 6 are placed at such a level with respect to the portions of the wheels engaging the lawn that sliding member 6, when the mower is being driven, normally is a small distance, one or a few centimeters, above the surface of the ground. Normally, sliding member 6 does not skid on the lawn but if during operation the mower should be tipped somewhat in such a manner that the hood would tend to touch the ground the tipping motion will be stopped before this can take place by support member 5 and sliding member 6 as is immediately clear- rom the figures of the drawings.
• support member 5 is adapted to extend forwardly as well as rearwardly from the wheel axle, and preferably as far or not fully as far rearwardly as forwardly.
• a sliding member 6 which like front sliding 6 normally is somewhat above the ground but which prevents substantial tipping of hood 2 and thus cutter 3 in the direction
• Support member 5 thus shaped hence effectively prevents the mower from tipping to such degree that hood 3 will touch the ground or that the cutter will be tilted and lifted enough for the cutting action to be adversely affected.
• hood 2 can be made very low - it need not be made higher than to allow free rotation of cutter 3 under the interior surface thereof - so that the mower will have a very low profile without any upwardly projecting portions, from the front peripheral surface, with respect to the driving direction, of one wheel 4, along the front peripheral edge of hood 2 and to the front peripheral surface of the other wheel 4. For this reason the mower can be moved into areas below even very low branches etc.
• the peripheral portion of the mower which is free of any projecting portions may comprise up to about 250° on account of the design made possible by support member 5.
• the mower may be moved very close to tree trunks and other objects along the whole of the said arc, and therefore cutting can be carried out without difficulty also immediately adjacent such obstacles.
• hood 2 is preferably circular about the rotor axis, at least along the front portion of the periphery from one wheel to the other.
• Support member 5 may consist of one single piece of a straight tube or other section member which extends substantially in the median plane of the mower. However, it will have better stability if shaped about as shown in Fig. 6.
• the rear portion of support member 5 has the shape of a Y and the ends 7 of the mutually angled arms may be formed to constitute bearings rotatable about axle 1.
• support member 5 extends forwardly with only one arm which originates at and preferably constitutes a direct continuation of one end 7 and extending therefrom first to a point vertically below the centre of rotation of cutter 3 and from there in the vertical median plane of the mower up to the front end the position of which has been indicated above.
• Member 5 may be somewhat resilient to permit the mower to tip somewhat about the wheel axle in opposition to the spring action of member 5 when the single sliding member 6 or one of two sliding members 6 is in contact with the ground.
• a washer 8 is preferably provided on the top face of member 5 opposite the lower end of the cutter shaft to permit the latter to more or less momentarily engage and rotate against washer 8.
• member 5 permits the mower of the invention to have only one wheel axle 1 and only one pair of wheels 4 placed substantially rearwardly of hood 2. This in its turn permits setting the working . level of the mower with only one single set screw 9. This may fqr instance be adapted to be threaded into or out of a nut 10 and to raise or lower axle 1 via links 11 and 12.
• each wheel 4 in this case is provided with a stub shaft journalled in an upper end of the substantially vertical arm of a toggle link 13. At the portion thereof where the two arms of the toggle link 13 meet the toggle link is fixed at the end of the wheel axle and is rotatably journalled in hood 2 at the end of its substantially horizontal arm.
• Link 12 is fixed in member 5 which is also journalled in axle 1 (Fig. 2). In the embodiment shown in Fig.
• support member 5 comprises two forwardly directed, mutually parallel arms extending on each side of and somewhat beyond the centre of rotation of cutter 3. They are interconnected fcy a transverse member which carries a cutter axle stop washer 8.
• the arrangement of two forwardly directed arms makes the mower somewhat less prone to tilt about the longitudinal axis which is advantageous in certain situations.
• this makes possible cutting somewhat closer to a lawn edge where the ground level outside the lawn is lower than the ground level of the lawn without the mower tilting appreciably about the longitudinal axis, than with the embodiment having only one centrally extending, forwardly directed support member arm.
• support member 5 consists of two arms which are parallel with each other and with the longitudinal axis (or driving direction) of the mower and which extend on each side of the longitudinal axis of the mower, the said arms being interconnected at their ends through transverse members which preferably are curved so as to be concave toward wheel axle 1. Also, they are interconnected by a transverse member carrying a cutter axle stop washer 8. In this case no sliding members 6 are needed since the function of such members may be assumed by the preferably curved members, interconnecting the ends of the parallel support member arms.
• hood 2 is shaped to gradually turn into a duct or conduit 14 of the shape of a volute opening between the mower handles 12 (Figs. 1 and 2) and to which a laterally rotatable adapter 16 may be connected.
• a receptacle 17 for collecting the cut grass may be connected to the latter.
• OMPI OMPI
• motor 18 is given a higher speed of revolution than is usual for conventional lawn mowers.

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• Life Sciences & Earth Sciences (AREA)
• Environmental Sciences (AREA)
• Harvester Elements (AREA)

Applications Claiming Priority (4)

Publications (1)

Family

ID=26657684

Family Applications (1)

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• 1980
  • 1980-12-30 SE SE8009187A patent/SE426284B/sv not_active IP Right Cessation
• 1981
  • 1981-09-15 NO NO813133A patent/NO151176C/no unknown
  • 1981-09-23 EP EP81902587A patent/EP0060853A1/de not_active Withdrawn
  • 1981-09-23 WO PCT/SE1981/000276 patent/WO1982000939A1/en not_active Ceased
  • 1981-09-24 BE BE0/206060A patent/BE890489A/fr not_active IP Right Cessation

Non-Patent Citations (1)

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