Automated dressing unit for a chain saw

An operator operates a throttle lever and by maximizing the extent of said operation, the drive state is initiated, and the crank shaft rotation rate R increases and reaches the maximal value (RC) thereof. Subsequently, the operator operates the dressing operation lever so as to be in a second state...

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Bibliographic Details
Main Authors Naganuma, Kenji, Sagawa, Kouji
Format Patent
LanguageEnglish
Published 21.04.2020
Subjects
BROACHING
COMPONENTS OR ACCESSORIES THEREFOR
FILING
LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
NAILING OR STAPLING MACHINES IN GENERAL
PERFORMING OPERATIONS
PLANING
SAWING
SAWS FOR WOOD OR SIMILAR MATERIAL
SCRAPING
SHEARING
SLOTTING
TRANSPORTING
WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL
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Summary:An operator operates a throttle lever and by maximizing the extent of said operation, the drive state is initiated, and the crank shaft rotation rate R increases and reaches the maximal value (RC) thereof. Subsequently, the operator operates the dressing operation lever so as to be in a second state at elapsed time (t0) while keeping the extent of the throttle lever operation maximized. Because a microswitch is turned off, the crank shaft rotation rate (R) is controlled in a range of R1<R<R2. By placing the saw chain in contact with a grindstone fixed to the dressing operation lever simultaneously with said action, dressing work is performed. After the microswitch is turned off at elapsed time (t0), the output of an ignition coil is controlled cyclically by a control unit at a cycle (T1+T2) so as to be on (ignition) during period (T1) and off (flame off) during period (T2).
Bibliography:Application Number: US201615569769