Abstract: A system may include sensor equipment, task performance equipment, and a yard maintenance manager. The sensor equipment may include one or more sensors disposed on a parcel of land. The task performance equipment may be configured to perform a task on the parcel. The task may be associated with generating a result that is enabled to be monitored via the sensor equipment. The yard maintenance manager may be configured to interface with the sensor equipment and the task performance equipment to compare measured conditions with desirable conditions to direct operation of the task performance equipment.

Abstract: A vacuum attachment (1) for a blower (2), comprising: an input air channel (3) having an air inlet (4); and a through channel (5) from a vacuum inlet (6) to an outlet (7), in which the input air channel (3) terminates in a port (8) in the through channel (5), in which the port (8) is positioned so as to direct air flowing from the input air channel (3) in a direction through the through channel (5) away from the vacuum inlet (6), in which the air inlet (4) has a mounting surface (9) on which can be mounted an air outlet (10) of the blower (2) in a releasable and re-engagable manner. Thus, with a blower (2) connected to the air inlet (4), an airflow introduced at the air inlet (4) will cause an airflow from the vacuum inlet (6) to the outlet (7), entraining debris with the airflow.

Abstract: A clamping assembly (130) for clamping a guidebar (120) of a chainsaw (100) to a chainsaw body (110) via a clutch cover (150) including a receiving opening (210) having a series of teeth (212) defined at an internal periphery thereof is provided. The clamping assembly (130) includes an inner knob base (220) rotatably received within the receiving opening (210), a rack element (240) disposed at a portion of the inner knob base (220) to be engageable with the teeth (212), and a knob (140) configured to contact at least a portion of the inner knob base (220). The knob (140) includes a driver reception slot (252) formed therein to engage at least one driver (224) extending from the inner knob base (220). Responsive to rotation of the knob (140), the driver (224) engages the knob (140) to rotate the inner knob base (220) such that the rack element (240) sequentially engages the teeth (212) while tightening the knob (140) to the chainsaw body (110).

Abstract: A self-powered chainsaw, typically a battery powered chainsaw, including a housing, a power source, an endless cutting chain having a plurality of cutting elements and a motor arranged to drive the chain relative to the housing using power from the power source. The chainsaw also includes a sharpening element which is arranged so as to be driven relative to the cutting elements and the housing using the power source.

Abstract: A hand-held motor-driven cutting device is provided, comprising a motor 2, a first cutting tool 3, and a first transmission arranged to translate a rotating motion to a reciprocating motion of the first cutting tool 3. The first transmission comprises a first rotatable part 6 arranged to be driven by the motor 2 and a first connecting rod 9 with a first end 11 and a second end 12. The first end 11 is eccentrically connected to the first rotatable part 6 at a first connecting point 10 of the first rotatable part 6 and the second end 12 is connected to the first cutting tool 3. The first transmission 5 comprises a force limiting element 4 arranged between the first rotatable part 6 and the first cutting tool 3 in order to prevent a transmitted force applied to the first cutting tool 3 from exceeding a predetermined force level. The present invention also relates to a method of transmitting momentum in a hand-held motor-driven cutting device.

Abstract: To facilitate the demounting of a chain (3) from a chainsaw, the saw has a lever arm preferably in the form of hinged cover (11) arranged to displace the sprocket (15) towards the guide bar (2) the other upon opening of the cover (11). Upon closing the cover (11), the sprocket (15) is displaced in the opposite direction to pre-tension the chain (3). The sprocket (15, 115) may be driven over a gear transmission (27, 127), which when the chain (3, 103) is running at ordinary cutting speed uses resulting forces to automatically tension the chain (3, 103) by displacing the sprocket (15, 115) away from the guide bar (2, 102). A ratchet mechanism (34) may be provided to maintain the chain tension upon reduction of the chain speed by preventing the sprocket (15) from moving toward the guide bar (2). Alternatively, a mechanism for automatically tensioning the chain (3, 238) of a chainsaw includes a driving inner sprocket (76, 201), and an outer ring member (77, 204) surrounding the inner sprocket (76, 201).

Abstract: A chainsaw includes a chainsaw body, a chainsaw bar configured to be operably coupled to a cutting chain, and a clutch cover disposed proximate to a portion of the chainsaw bar to facilitate clamping the chainsaw bar to the chainsaw body. The clutch cover may be configured to receive a tension sub assembly disposed at a portion of the clutch cover to enable both adjustment of chain tension in a first mode of operation and clamping of the chainsaw bar in a second mode of operation. The tension sub assembly may include a mode shift mechanism configured to move between a first position in which the tension sub assembly operates in the first mode and a second position in which the tension sub assembly operates in the second mode.

Abstract: A self-powered chainsaw, typically a battery powered chainsaw, comprising a housing (1; 21), a power source (5; 25), a endless cutting chain (4; 24) having a plurality of cutting elements and a motor (6) arranged to drive the chain (4; 24) relative to the housing (1; 21) using power from the power source (5; 25), in which the chainsaw further comprises a sharpening element (12; 32) which is arranged so as to be driven relative to the cutting elements and the housing (1; 21) using the power source (5; 25).

Abstract: A typically battery-operated power tool, such as a chainsaw or hedge trimmer, comprising a working element (4), a motor (6) arranged to drive the working element (4) and a controller (9) arranged to control the speed at which the motor drives the working element (4), in which there is provided a sensor (12) for at least one factor indicative of the efficiency with which the power tool is being operated, the controller (9) being arranged to vary the speed at which the motor (6) drives the working element (4) should the factor indicate that the power tool is being operated in a sub-optimal manner. Typically, the factor is the pressure which the user is applying the power tool, and the sensor (12) is a sensor for the current flowing through the motor (6).