Harvesters – Motorized harvester – Including plural operating units and drive
Reexamination Certificate
1998-11-02
2001-05-08
Pezzuto, Robert E. (Department: 3671)
Harvesters
Motorized harvester
Including plural operating units and drive
C056S016600
Reexamination Certificate
active
06226967
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention concerns a conveyor for lawn mowers.
2. Description of the Related Art
With known lawn mowers the material cut by the mowing device is most often conveyed by means of a turbine blower or the like through a conveyance canal and blown out into a capturing container, grass capturing basket or the like. These conveyance means are associated with a significant noise production, which is considered to be very disturbing. Besides this, the conveyance means is not particularly large and stoppages can occur in the conveyance canal due to the cut material. The same applies for conveyor and collection devices for other loose material, such as sweeping machines or the like.
From DE 29 03 497 A1 a lawnmower is known, in which the oppositely lying conveyor belt sections enclose an acute angle, wherein they have a relatively large separation at the entry side, while at the exit side they contact each other linearly. The entering mowed material is strongly pressed in a cleft between the conveyor belt segments as they move towards each other in the direction of movement, which leads to a higher load on the conveyor belts by the pressed together mowed material. If the mowed material additionally contains blocking material, such as rocks or the like, or if it in conditions of high moisture strongly agglomerates or forms clumps, then there can occur blockages or damage to the conveyor belt system.
SUMMARY OF THE INVENTION
The present invention improves the conveyance device of the above discussed type such that during operation it hardly produces noise, makes possible a large through-put for cut material and in which stoppages of the conveyance device due to the cut material practically does not occur.
The conveyor belt employed in accordance with the invention operates particularly quietly, in particular since it need only be driven at a low speed in order to transport the received cut material or other material to the capturing container. As a result of the relatively slow progress of the conveyor belt there occurs also only a very small danger of accident or injury during use of the same. In the area of the actual conveyor section of the two conveyor belts these are pressed against each other under tension, so that when operated empty without conveying cut material they lie against each other. As soon as cut material arrives at the entry side of the conveyor belt sections, the conveyor belt sections are spread apart by the entering cut material and convey the cut material between them to the exit side of the conveyor belt sections, at which time it enters into the capture container. In the case that obstructive types of objects, stones or the like, are contained in the cut material, it is possible for the conveyor belts to give way at any time without blockage of the conveyor system. A further advantage of the employment of the inventive conveyor belt is to be seen therein, that during the passing of the cut material through the conveyor belt sections a spring like pressing is exercised upon the cut material, whereby any water in the cut material is pressed out and runs downwards. Thereby the cut material arrives comparatively dry and compacted at the capture container, which as a result can receive more cut material.
The inventive conveyor belt can be employed, as discussed, not only in lawn mowers, but rather also for conveyance and compacting of other loose material, for example from sweepings taken up by a sweeping machine.
The advantageous embodiments of the invention concern the spring tensioned mounted of one conveyor belt with respect to the other and the effective or practical embodiments of the drive of the conveyor belt and the belt itself.
The relative arrangement of conveyor belt and capturing device has the advantage that a supplemental pressing process is produced for the cut material deposited in the capturing container, since the capturing container is in this case filled in layers from the bottom upwards, wherein the upper layers respectively press against the lower layers.
Supplemental advantages result from the reversibility of the drive direction of the conveyor belt, for example during a blockage occurring despite the spring tensioned provision of the one conveyor belt or for simultaneous mulching during the mowing process, whereby the cut material can be emitted either out of the lower side of the mower housing or out of the ventilation canal of the same.
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Horst Staiger & Sohne GmbH
Mammen Nathan
Pendorf & Cutliff
Pezzuto Robert E.
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