Cutlery – Cutting tools – Plural cooperating blades
Patent
1996-12-23
1998-07-14
Payer, Hwei-Siu
Cutlery
Cutting tools
Plural cooperating blades
30249, 254391, A01G 3025
Patent
active
057785392
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for hand tools which are attached to a pole and can be actuated by a pull rope which is provided with a pull handle, particularly for tree pruning shears and other manual cutting tools suitable for the pruning or cutting of standing trees.
In the known pruning shears, branch cutters or other tools which can be operated by a pull rope, it is customary to fasten the pull grip on the end of the pull rope so that the pull grip always has a predetermined distance from the end of the pole. This meant that the pull grip could be operated conveniently only when the material to be cut was at a given height. In all other positions, the rope had to be shortened so that actuation was frequently not effected by means of the pull grip but by wrapping the rope around one's hand and pulling on it. This disadvantage is of importance in particular in the case of telescopically extendable poles, since the length of the rope must be adapted to the greatest length of the telescopic pole and this length is frequently not required.
The object of the present invention is therefore to make the pull grip placed on the pull rope available to the user at all times in the manner which is ergonometrically most favorable.
This object is achieved by the features set forth in the body of claim 1. Due to the fact that the pull grip is guided along the pull rope and can be fastened at any place, the result is obtained that, with any height of the cutting tool, the pull grip can always be grasped by the extended arm and pulled towards one's body. It is therefore no longer necessary to change the length of the pull rope or to grasp the pull rope itself.
The rope, which is clamped fast by clamping ribs in an angular segment release, can be pulled out of the clamping device by a lateral pull so that it can again be moved freely along the rope. In order to facilitate this release of the rope, in accordance with a further feature of the invention, a manually actuated release device by which the rope can be easily lifted out of the clamping ribs is provided. This release device consists of a release sleeve which is guided in the passage hole for the rope which is extended upward through a bearing sleeve and can be pushed into the region of the angular segment recess. This release sleeve is provided with a handle by which the release sleeve can be conveniently pushed into the angular segment region against the force of a return spring.
A further disadvantage of known devices is that upon the positioning of the manual cutting tool, the rope can easily slip out of one's hand and, in case of a corresponding oblique position of the pole, is then beyond the reach of the hand so that the tool has to be positioned all over again after recovering the rope. Furthermore, the remaining length of rope when the telescopic pole was not fully extended or upon an oblique position thereof lay on the ground and the rope could become entangled or catch on objects present on the ground so that a new positioning frequently had to be effected because of this.
Another object of the invention therefore is to hold the pull rope together with the pull handle at all times in the reachable proximity of the pole.
This object is achieved by the features set forth in the body of claim 9. The rope storage which is provided with a winding reel which is under spring tension can be fastened to the lower end of the pole and also serves to support the pole against one's body, for which purpose the lower part of the reel housing is provided with a soft rubber pad which prevents sliding on the body and, due to the larger surface, does not result in any unpleasant pressure points. As soon as the cutting tool has been brought into cutting position, and after adjustment of the telescopic pole to the required length, the rope storage can be supported on the body, preferably on the thigh. The pull rope extends in the vicinity of the pole and can be conveniently grasped by means of the pull handle, in which connection the pull handle can be fastened p
REFERENCES:
patent: 2259642 (1941-10-01), Hoyt
patent: 4224739 (1980-09-01), Emblidge
Schneider Manfred
Staudt Gerhard
Payer Hwei-Siu
Wolf-Garten GmbH & Co. KG
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