Blade Assembly of a Hedge Trimmer
First Claim
1. A blade beam of a motor driven hedge trimmer, said blade beam comprising:
- a first and a second shear knife, at least one of said first and said second shear knives being configured to be moveable in an oscillating manner counter to the other one of said shearing knives by a stroke between two reversal points;
said first and said second shear knives each having cutting teeth which are arranged at a distance (a) one from the other;
said cutting teeth of said first shear knife and said cutting teeth of said second shear knife being configured to act in opposition to each other;
a portion of said cutting teeth having cutting edges for carrying out a chipless, shearing severing of material to be cut;
said first and said second shear knives having respective first cutting teeth;
said first and said second shear knives being configured so as to cause said first cutting tooth of one of said first and second shear knives to be at least in partial overlapment with said first cutting tooth of the other one of said first and said second shear knives at said two reversal points;
a trim cut region having at least a subset of said cutting teeth including said first cutting tooth, a second one of said cutting teeth and a third one of said cutting teeth disposed between said first and second cutting teeth;
said cutting teeth in said trim cut region being at said distance (a) from each other; and
,said distances (a) between the three cutting teeth and said stroke being matched to each other so as to cause said first cutting tooth of one of said first and said second shear knives to completely glide over the third cutting tooth of said other one of said first and said second shear knives as said first shear knife moves between said two reversal points.
1 Assignment
0 Petitions
Accused Products
Abstract
A blade beam of a motor driven hedge trimmer has two shearing knives. A shearing knife is movable in an oscillating manner through a stroke between two reversal points in the opposite direction with respect to the other shearing knife. Both shearing knives have spaced-apart cutting teeth that act against each other, and are at least partially provided with shearing blades for the chipless, shearing severing of material to be cut. A first cutting tooth of the one shearing knife lies at least partially in overlap with a first or second cutting tooth of the other shearing knife at the two reversal points. The blade beam has a trim cut region, in which the first cutting tooth of the one shearing knife completely glides, between its two reversal points, over a third cutting tooth lying between the first and the second cutting tooth of the other shearing knife.
-
Citations
21 Claims
-
1. A blade beam of a motor driven hedge trimmer, said blade beam comprising:
-
a first and a second shear knife, at least one of said first and said second shear knives being configured to be moveable in an oscillating manner counter to the other one of said shearing knives by a stroke between two reversal points; said first and said second shear knives each having cutting teeth which are arranged at a distance (a) one from the other; said cutting teeth of said first shear knife and said cutting teeth of said second shear knife being configured to act in opposition to each other; a portion of said cutting teeth having cutting edges for carrying out a chipless, shearing severing of material to be cut; said first and said second shear knives having respective first cutting teeth; said first and said second shear knives being configured so as to cause said first cutting tooth of one of said first and second shear knives to be at least in partial overlapment with said first cutting tooth of the other one of said first and said second shear knives at said two reversal points; a trim cut region having at least a subset of said cutting teeth including said first cutting tooth, a second one of said cutting teeth and a third one of said cutting teeth disposed between said first and second cutting teeth; said cutting teeth in said trim cut region being at said distance (a) from each other; and
,said distances (a) between the three cutting teeth and said stroke being matched to each other so as to cause said first cutting tooth of one of said first and said second shear knives to completely glide over the third cutting tooth of said other one of said first and said second shear knives as said first shear knife moves between said two reversal points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A motor-driven hedge trimmer comprising:
-
a first blade beam including; a first and a second shear knife, at least one of said first and said second shear knives being configured to be moveable in an oscillating manner counter to the other one of said shearing knives by a stroke between two reversal points; said first and said second shear knives each having cutting teeth which are arranged at a distance (a) one from the other; said cutting teeth of said first shear knife and said cutting teeth of said second shear knife being configured to act in opposition to each other; a portion of said cutting teeth having cutting edges for carrying out a chipless, shearing severing of material to be cut; said first and said second shear knives having respective first cutting teeth; said first and said second shear knives being configured so as to cause said first cutting tooth of one of said first and second shear knives to be at least in partial overlapment with said first cutting tooth of the other one of said first and said second shear knives at said two reversal points; a trim cut region having at least a subset of said cutting teeth including said first cutting tooth, a second one of said cutting teeth and a third one of said cutting teeth disposed between said first and second cutting teeth; said cutting teeth in said trim cut region being at said distance (a) from each other; said distances (a) between the three cutting teeth and said stroke being matched to each other so as to cause said first cutting tooth of one of said first and said second shear knives to completely glide over the third cutting tooth of said other one of said first and said second shear knives as said first shear knife moves between said two reversal points; a second blade beam including a coarse cut region in lieu of said trim cut region; and
,said first blade beam being exchangeable for said second blade beam.
-
Specification