A - Human Necessities – 01 – G
Patent
A - Human Necessities
01
G
A01G 3/053 (2006.01)
Patent
CA 2155805
A hand-held power-operated hedge trimmer for trimming plant growth such as hedges, shrubs, tree branches and the like. The hedge trimmer includes a housing containing a motor assembly, a blade assembly extending forwardly in a lengthwise direction from the housing, and a drive mechanism for coupling a movable cutting blade of the blade assembly to an output of the motor assembly for causing reciprocatory rectilinear movement of the movable cutting blade relative to a stationary combing blade in response to selective actuation of the motor assembly. The cutting blade includes a series of cutter teeth formed along its opposite longitudinal edges with each cutter tooth having a compound tooth profile. The compound tooth profile includes a pair of shear tooth segments formed along opposite lateral edges of the cutter tooth and a saw tooth segment formed at its distal edge between the shear tooth segments. In addition, a series of sizing lugs are formed along the opposite longitudinal edges of the movable cutting blade between each pair of adjacent cutter teeth for establishing entrapment channels therewith. In operation, smaller twigs and branches are drawn into the entrapment channels and into alignment with the adjacent shear tooth segment for shear-cutting with a single stroke of the cutting blade. The sizing lugs prevent larger branches from being drawn into the entrapment channels so as to align them relative to the saw tooth segments for saw-cutting with a multi-stroke sawing action.
Cette invention concerne une cisaille électrique à main servant à tailler haies, arbustes, branches d'arbre et éléments analogues. Elle comprend un corps renfermant un moteur, des lames superposées oblongues montés sur le devant du corps et un mécanisme d'entraînement reliant la lame mobile à l'arbre de sortie du moteur et configuré pour animer ladite lame d'un mouvement de va-et-vient par rapport à une lame fixe en forme de peigne. La lame mobile comprend une série de dents de coupe taillées dans ses deux rives longitudinales opposées, chaque dent ayant un profil composé. Ce profil présente une paire de segments cisaillants taillés le long des rives latérales opposées de la dent et un segment en dents de scie sur le bout distal de la dent, entre les deux segments cisaillants. De plus, la lame mobile comporte sur ses deux rives longitudinales opposées une série d'ergots intermédiaires entre chaque paire de dents dont le rôle est de définir des gorges de retenue où les petites branches sont proprement alignées pour un sectionnement cisaillant d'un seul coup. Ces ergots ont également pour rôle d'empêcher les branches d'un certain diamètre de se loger dans les entredents, la coupe se faisant alors grâce aux pointes en dents de scie de la lame mobile animé d'un mouvement de va-et-vient.
Lee Tae
Meloni Robert A.
Wheeler Dale K.
Black & Decker Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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