Abstract:
A wood chipper or grinder includes counter rotating upper and lower feed drums driven by a hydraulic motor at variable fluid pressure to produce variable torque to the feed drums. Wood debris fed to a gap between the rollers is advanced toward a grinder or chipper to reduce the material. A hydraulic feed control system operates off the variable hydraulic pressure associated with the motor and, in an automatic mode, exerts more or less downward clamping pressure on the upper feed drum with changes in pressure to the motor. The system sets an upper limit on the clamping pressure in the automatic mode which can be overridden manually if necessary to apply greater downward force than that achievable in the automatic mode. The upper feed drum can also be manually raised if necessary.
Abstract:
An improved brush cutter having an upper feed control member with stop, forward, neutral, and reverse positions also has a lower feed stop member with selectable sensitivity. Another aspect of the invention is to predict the feed roller shutoff point according to the rate of engine deceleration. According to another aspect, when the feed rollers stop feeding material into the cutters, to overcome drag on the cutters, a controller stops the feed rollers and then reverses them for a short time, and then reverses the rollers again if the problem is still present. To prevent jamming, a pressure switch senses when oil in a hydraulic motor system for rotating the feed rollers is too high and the controller momentarily reverses the feed rollers and then causes them to go forward, a cycle which can occur several times until the feed rollers are no longer stalled. By another aspect of the invention, the controller senses characteristics of the brush cutter and chooses an operating system based on the characteristics sensed. The controller can also sense if the brush chipper has not been used for a predetermined period of time and automatically reduce the idle speed of the engine until the brush chipper is used again, and then automatically return the engine to a normal idle speed before the feed rollers will pull brush into the brush chipper.
Abstract:
A wood chipper includes a cutting assembly and a feed wheel for feeding material through an adjustable throat opening adjacent the feed wheel and toward the cutting assembly. A throat sensor measures the size of the throat opening and an electronic control unit (ECU) controls operation of the wood chipper in accordance with the size of the throat opening. The ECU controls forward, reverse and non-rotation of the feed wheel as well as down pressure applied by the feed wheel on feed material moving through the throat opening. The feed wheel down pressure may be constant or vary in any number of ways. One option includes applying down pressure in a pulsating manner.
Abstract:
A wood chipper includes an engine and a cutting assembly. A rotatable feed wheel and a gap-bounding member define therebetween an adjustable gap through which feed material moves toward the cutting assembly. An electronic control unit (ECU) controls force applied to the feed wheel or gap-bounding member toward the feed material in response to an operational condition of the wood chipper. The ECU can maintain or vary the force in any desired manner. One option is to apply the force with a pulsating mechanism in a pulsating manner to enhance the feeding procedure. The pulsating mechanism is in communication with a sensor from which the ECU receives signals typically indicating an operational speed of the cutting assembly or the engine. An ECU logic circuit permits the pulsating force only if the operational speed exceeds a predetermined threshold.
Abstract:
This invention provides garden refuse shredding apparatus (10) which has a chipping rotor (20) supported for rotation about a vertical shaft (31) in a chamber (11) which has a hopper (14) which feeds refuse to radially disposed elongate chipper blades (30) which span a major part of the rotor (28). Fan blades (44) are supported on the rotor for creating an airflow through the hopper (14) to assist feed to the chipping rotor and to assist discharge of shredded refuse from the outlet (45). The chipping rotor (20) is driven directly from the vertical output shaft (36) of an electric motor or a petrol engine (21).
Abstract:
A machine for reducing material that includes a rotatable cutting drum. In a preferred embodiment there is disclosed a machine for reducing material which includes a rotatable, tapered cutting drum and a flywheel. In another preferred embodiment, there is disclosed a machine for reducing material which includes a rotatable, tapered cutting drum and a discharge assembly. In still another preferred embodiment there is disclosed a machine for reducing material which includes a rotatable, tapered cutting drum, a flywheel and a discharge assembly.
Abstract:
A cutting device for reducing waste material comprises at least two groups of knives mounted on a shaft, next to one another, installed rotatably in front of an anvil. The groups of knives, each operating in a restricted zone of the width of supply each comprises several splitting knives to split the waste material mainly according to the sense of supply of the waste material. Each comprises at least one chopping knife intended to cut the waste material mainly across the sense of supply of the waste material to be cut. The chopping knives of the groups of knives situated next to one another are mounted on the shaft, shifted with respect to one another, so that each of them affects the waste material at a different time and place. A calibrating sieve filters the free discharge of the shreds and contributes to a supplementary (secondary and tertiary) cutting.
Abstract:
An apparatus for collection and reduction of twig-containing yard debris combining a frontally facing twig breaker with a chipper-shredder-blower unit to induce airflow for entraining debris collected at the vacuum pick up; reduce the entrained debris to a more manageable volume; and impel the reduced debris to a free-flow-separator device for removing the debris from the air in which it is entrained.
Abstract:
A machine for collecting and reducing wood including a prime carrier; a debris collector operatively attached to the prime carrier; a shredder assembly attached to the prime carrier, the shredder assembly having an input and an output; a storage bin for holding reduced wood, the storage bin attached to the prime carrier; and a conveyor adapted to move reduced wood from the output of the shredder assembly to the storage bin. The prime carrier may also have a universal adapter of substituting attachments. A variable torque, drum shredder for reducing wood. The drum shredder includes a housing; a tapered cutting drum rotatably mounted within the housing; an anvil; at least one cutting blade disposed about an outer surface of the cutting drum to provide a compound cutting angle; and a drive connected to the cutting drum. A shredder having a discharge assembly adapted for accommodating discharged material with at least two major discharge streams with at least two major discharge directions.
Abstract:
A shredder including a frame, a housing with a housing opening mounted to the frame, and a cutting blade mounted within the housing for use in shredding associated lawn debris is provided. The shredder also includes an engine mounted to the frame for use in driving the cutting blade and a hopper assembly for use in directing the associated lawn debris into the housing opening and to the cutting blade. The hopper assembly includes a chute having a first end pivotably connected to the housing and having a chute opening for receiving the associated lawn debris. The chute opening communicates with the housing opening. The chute can be positioned into first and second positions with respect to the housing. The hopper assembly also includes a flap for automatically covering at least a portion of the chute opening when the chute is placed in the first position and for automatically uncovering the opening when the chute is placed in the second position. A flap bail pivotably connected to the chute is used to hold the flap against an inner surface of the chute thereby uncovering the chute opening. The flap bail is adjusted as the chute is adjusted by an adjustment mechanism. The adjustment mechanism includes a control rod having a first end and a second end that is pivotably connected to the housing. The adjustment mechanism also includes an arm bracket having a first end fixedly connected to the first end of the flap bail and a second end pivotably connected to the first end of the control rod.