Back to results
US 4,930,386 AGranted
Sawmill with hydraulically actuated components
AssigneeWood-Mizer Products, Inc.
InventorsDonald R. Laskowski, Daniel R. Tekulve
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeWood-Mizer Products, Inc.
InventorsDonald R. Laskowski, Daniel R. Tekulve
Estimating the term…
A sawmill has an elongated track extending longitudinally adjacent a platform for supporting a log. A carriage which carries a bandsaw is reciprocally movable along the track past the platform to cut the log with the bandsaw. The sawmill also has a clamp mechanism reciprocally movable laterally across the platform to clamp the log in place, which mechanism is movable between an upright position and a reclining position to provide a clamp for an uncut log and a clamp for a squared log. The sawmill also has a log turning mechanism and a log loading mechanism. The log loading mechanism includes two arms which are rotatable from the ground to the platform to load a log onto the platform. A hydraulic cylinder is coupled to each arm and acts against the ground to move the arms. The mechanisms are hydraulically actuated and the sawmill includes an electric motor which drives a hydraulic pump for providing pressurized hydraulic fluid to actuate the hydraulically actuated mechanisms. A source of electricity for powering the electric motor is carried on the carriage and is interlocked to the electric motor such that electricity is provided to the electric motor only when the carriage is in a predetermined position which is preferably at one end of the track.
A sawmill comprising elongated track means, platform means for supporting a log adjacent the track means, a carriage movable longitudinally along the track means past the platform, cutting means mounted on the carriage to cut the log on the platform, means for loading the log onto the platform, said loading means including log engaging means movable toward and away from the platform, said log engaging means extending outwardly from a first side of said platform, ground engaging means for engaging the ground including a ground engaging element, said ground engaging means extending outwardly from said first side of said platform, means for driving said log engaging means toward and away from said platform, said driving means acting between said log engaging means and said ground engaging element outwardly of said first side of the platform.
A sawmill comprising elongated track means, platform means for supporting a log adjacent the track means, a carriage movable longitudinally along the track means past the platform, cutting means mounted on the carriage to cut the log on the platform, means located adjacent a first side of the platform means for loading the log onto the platform, said loading means including log engaging means movable toward and away from the platform, and means pushing against the ground outwardly from said first side of the platform means connected to drive the log engaging means toward and away from the platform.
A sawmill comprising elongated track means, platform means for supporting a log adjacent the track means, a carriage movable longitudinally along the track means past the platform, cutting means mounted on the carriage to cut the log on the platform, an arm having a proximal end pivotally coupled to the platform and a distal end extending outwardly of the platform means at one side thereof for supporting the log, means for driving the arm to rotate the arms' distal end between the ground and the platform to load the log onto the platform, the drive means including means for pushing against the ground outwardly of said one side of the platform means connected to rotate the arm between the ground and the platform.
A sawmill comprising elongated track means having a proximal end and a distal end, platform means for supporting a log adjacent the track means, a carriage movable longitudinally along the track means past the platform, cutting means mounted on the carriage to cut the log on the platform, means for loading the log onto the platform, said loading means including log engaging means movable toward and away from the platform, means for driving said log engaging means toward and away from said platform, means for actuating said drive means to cause the drive means to drive said log engaging means, means for interlocking said drive means to said actuating means to allow the actuating means to actuate the drive means only when said carriage is in a predetermined position.
A sawmill comprising elongated track means having a proximal end and a distal end, platform means for supporting a log adjacent the track means, a carriage movable longitudinally along the track means past the platform, cutting means mounted on the carriage to cut the log on the platform, at least one means for handling the log, means for driving said log handling means, means for actuating said log handling means, means for interlocking said drive means to said actuating means to allow the actuating means to actuate the drive means only when said carriage is in a predetermined position.
Dependencies are inferred from the claim text.