The aim of this invention is to minimize that unnecessary motion existing between saw's body and pole and thus increase the saw's controllability. It is common, that saw's body and handlebar units are isolated from pole with springs or equal rubberbushing elemets. By this way the vibration levels are easily lowered, but at the same is caused essentially harm in saw's rigidity.

In this solution the spacing existing between saw's pole and body is utilized effectivly for getting saw more rigid. For example a cylindertube constructed of polyethylene, as mounted into this empty spacing, can effectivly restrict the movements between the pole and the body in situations when powerpeaks are focused into handlebar or cuttingblade.

Especially handlebar's rapid steeringmotions and actions to fastly control treefalls are exposing saw for these powerpulses. It is just the workstages with these fast movements, more rigid sawstructure is bringing more effect and precision.

More rigid saw simplifies the utilization of both enginepower and the energy generated into cuttingequipment. This advantage is very obvious when cutting bigger treetrunks. Advantage is all highlighted in stands trunks are moreover positioned closely or grow in bush.

The advantage of stabilization is biggest when the saw's pole-, body- and handlebar structures are readily rigid ones or these elements are converted to this direction. One more point to consider is that a rigid saw requires as a whole less grip-power for steering. In other words a tighter grip is more for demand in changes of pole's speed and direction and in rapid movements to control cuttings. Alike when the backhandside of cutter is employed there is less need for tighter grip, because the cutter itself is pulling trunks towards the cutter. These factors must also be taken into consideration when evaluating the stabilization and possible rise in vibrations.

The saw's improved actual performance at work is the very aim of this invention and the measured vibration values has to be evaluated relating to success in that.

The boosted performance at work is also contributing to decrease in engine's fuel consumption and all over wear. Rigid saw with it's speed and precision is also conributing to fewer trunkdamages and fewer number of trunks to be cut accidentally. Stabilized saw is also usefull when there is need to poke trunks into wanted direction with saw's pole.

Additionally clearingsaw's antivibration structures, steel springs or rubber shells are to be less stressed with emloyment of this invention. Equally the lifetime of these elements is extended.

The advantages generated by the support elemets can be achieved with unnoticed increase in weiht for example by utilizing polyethylene foam supports .

Invention is here more closely described referring to pictures, in which Fig. 1 is presenting as a partial crosspicture antivibration structures conformable to invention as seen from a side.

Fig. 2 is presenting a sole longer separated supportelemnt as seen from a side.

Fig. 3 is presenting traditional supportelement in frontbody as seen in crosspicture.

Clearingsaw's antivibration structure, which is constructed of body 1 (Fig. 1), which is connecting in front through antivibrationelements 5 and 6 (Fig. 1) including fasteners 15-18 (Fig. 1) and through mediumpart 19 (Fig. 1) to saw's pole 2 (Fig. 1). In fronthead of body 1 (Fig. 1) is sub- constructed motionrestrictor 23 (Fig. 1) and equal projector 27 (Fig. 1) inside the mediumpart 19 (Fig. 1). The body's 1 (Fig. 1) rear part is here connected through antivibrationelements 3 (Fig. 1) and 4 (Fig. 1) with fasteners 11-14 (Fig. 1) to outer side of clutchcover 25 (Fig. 1).

In this solution the spacing 7 (Fig. 1) existing between the saw's pole 2 (Fig. 1) and bodycylinder's inner surface 24 (Fig. 1) is employed by mounting supportelements 8 (Fig. 1) and 9 (Fig. 1) into the both ends of this spacing 7 (Fig. 1). In example supportelements 8 (Fig. 1) and 9 (Fig. 1) or 10 (Fig. 2) are constructed of polyethylene foam.

The mounting is made into endparts of spacing 7 (Fig. 1), because the relative effect of support is biggest in ends of spacing 7 (Fig. 1) and is decreasing gradually towards middle of saw's body 1 (Fig. 1).

Alternately the aimed stabilization can be reached by employing a sole substantially effective support element 10 (Fig. 2) as positioned to start from the very front of saw's bodycylinder spacing 7 (Fig. 1), here it is equal to extended or strenghtened support element 8 (Fig. 1). In example the tubular support element 10 (Fig. 2) is presented in it's maximum lenght. On surface of pole 2 (Fig. 1) positioned inside the frontpart of body 1 (Fig. 1) is traditional support element 26 (Fig. 3). In comparision to support element 8 (Fig. 1) it is more like restrictor and dampener for the maximum movements generated between pole 2 (Fig. 1) and body 1 (Fig. 1) than active support element.

The support elements 8 and 9 (Fig. 1) and 10 (Fig. 2) are , due their sizing and structure, essentially stabilizing the saw ,in other words, these elements are decreasing the differencies in movements between saw's body (Fig. 1) and pole (Fig. 1). These generating differencies are a result of powerpulses focused to saw at work.

As a result steering movemets focused to handlebar unit, which is connecting to body 1 (Fig. 1), are transfering as without delay and difference to the pole 2 (Fig. 1)

Thus the impact of support elements 8, 9 (Fig. 1) and 10 (Fig. 2) is active in comparision to a bit equal traditional support element 26 (Fig. 3).

Because the outer area 22 (Fig. 1) of the support elements is large these elements can proportionally supply a substantial supporteffect even with small surface pressures focusing towards inner surface 24 (Fig. 1) of the body 1 (Fig. 1). Thus a larger and soft support element, mattress- or padlike structure, can generate equal support response to smaller and stiffer one. The extra vibration effects caused by employment of this extra supporting is more manageable with usage of larger, soft, small pressure support units compared to employment of stiffer and smaller supports.

The support element can consist of homogeneous polyethylene foam like in support element 8 (Fig. 1) or the outer layer can consist of softer material 21 (Fig. 1) than the inner layer 20 (Fig. 1) , in this example support element 9 (Fig. 1). In example the wallheight of support elements 8, 9 (Fig. 1) or 10 (Fig. 2) is bigger than the average height of the spacing 7 (Fig. 1) where these elements are mounted. Accordingly they become, as saw is in stationary state , in light contact with inner surface 24 (Fig. 1) of the body 1 (Fig. 1). This solution can even lower the saw's vibration levels, because that beforetold contact is partially preventing the free shaking of saw's pole 2 (Fig. 1) emerged by saw's vibration sources; including engine unit, drive shaft, bevel gear and cutter.

If support elements 8 , 9 (Fig. 1) and 10 (Fig. 2) are not mounted to direct contact with the inner surface 24 (Fig. 1) of the body 1 (Fig. 1). By the lost of this contact and friction, there can also more freely emerge some partial rotation between the saw's body 1 (Fig. 1) and pole (Fig. 2). That lack of prevailing direct contact between the support elements 8, 9 (Fig. 1) , 10 (Fig. 2) and the inner surface 24 (Fig. 1), and stability loss caused by it, can be compensated by utilizing more rigid or larger support elements for wanted effectiveness. However according to aim of this invention the gap between the contact surfaces 22 and 24 (Fig. 1) means always a partial decrease in saw's stability in comparision to a fixed structure. Resulted stability for a saw is about a sum of emloyed antivibration element's 3, 4, 5 and 6 (Fig. 1) , quality of these, and emloyed support elements 8, 9 (Fig. 1) and 10 (Fig. 2). In principle, the support elements 8, 9 (Fig. 1) do not require any modifications to saw's antivibration elements 3-6 (Fig. 1). It means, that a substantial suppor impact can be reached with right flexible support elements 8, 9 (Fig. 1) and 10 (Fig. 2) in relation to resulted vibrationeffects these elements are to bring along.

Support elements 8 ,9 (Fig. 1) and 10 (Fig. 2) are decreasing the strain focused to antivibration elements 3-6 (Fig. 1), so the the rigidity of of these elements is possible to reduce in the search for optimal combination of rigidity and vibrations between antivibration elements 3-6 (Fig. 1) and support elements 8, 9 (Fig. 1) and 10 (Fig. 2).

Support elements 8, 9 (Fig. 1) and 10 (Fig. 2) do not necessarily require any specific fastening into pole 2 (Fig. 1). Those can still be positioned for example with glue or tape into surface of pole 2 (Fig. 1) or alternately into inner surface 24 (Fig. 1) of bodycylinder.