A vegetation trimmer having a blade guard and a drive motor and an elongated drive shaft coupled to the drive motor is disclosed. The blade guard is coupled to the power head assembly, a cutting blade is attached to an output shaft of the power head assembly for rotation relative to the blade guard. The cutting blade being rotatable relative to the blade guard for cutting vegetation when the vegetation trimmer is operational. The blade guard having a diameter larger than a diameter of the cutting blade for protecting the blade and structures near or against where the vegetation trimmer is used. The blade guard defining a plurality of shear openings for receiving vegetation to be cut via the vegetation trimmer.

A piston lock system having first and second cylinders, first and second pistons telescopically connected to the cylinders, and first and second piston locks. The piston locks are movable in a transverse direction within a planar region between the cylinders, between unlocked positions in which the piston locks are not located between the free ends of the cylinders and the free ends of the piston, and locked positions in which the piston locks are located between the free cylinder ends and the free piston ends. A control link is operatively connected to the piston locks, and configured to simultaneously move the piston locks between the locked and unlocked positions.

A riding lawn mower has an internal combustion engine and a muffler with a first housing. The internal combustion engine is connected to the muffler to supply exhaust gases originating from the internal combustion engine to the first housing of the muffler for noise damping of the exhaust gases. A second housing is provided that thermally insulates the first housing of the muffler. The second housing at least partially encloses the first housing of the muffler. The second housing has an exterior side with an emissivity of greater than 0.8.

A riding lawn mower has an internal combustion engine and a muffler with a first housing. The internal combustion engine is connected to the muffler to supply exhaust gases originating from the internal combustion engine to the first housing of the muffler for noise damping of the exhaust gases. A second housing is provided that thermally insulates the first housing of the muffler. The second housing at least partially encloses the first housing of the muffler. The second housing has an exterior side with an emissivity of greater than 0.8.

A piston lock system having first and second cylinders, first and second pistons telescopically connected to the cylinders, and first and second piston locks. The piston locks are movable in a transverse direction within a planar region between the cylinders, between unlocked positions in which the piston locks are not located between the free ends of the cylinders and the free ends of the piston, and locked positions in which the piston locks are located between the free cylinder ends and the free piston ends. A control link is operatively connected to the piston locks, and configured to simultaneously move the piston locks between the locked and unlocked positions.

A blade protection cover coupled to a blade of a lawn mower apparatus includes a first cover for covering one face of the blade and two second covers connected to the first cover. The two second covers cover two edges of the blade in a width direction of the blade. Two guides are disposed on inner faces of the two second covers. The two guides are configured to guide the blade protection cover to slide along the two edges in the width direction of the blade.

A blade protection cover coupled to a blade of a lawn mower apparatus includes a first cover for covering one face of the blade and two second covers connected to the first cover. The two second covers cover two edges of the blade in a width direction of the blade. Two guides are disposed on inner faces of the two second covers. The two guides are configured to guide the blade protection cover to slide along the two edges in the width direction of the blade.

A hand-pushed power tool includes a tool body including a working assembly, a control unit for controlling running of the working assembly, and a handle device. The handle device includes an operation member and a connecting rod assembly including a first connecting rod connected to the tool body. The first connecting rod includes a first lower rod portion and a first upper rod portion. The first upper rod portion is slidable relative to the first lower rod portion to a retracted position and an expanded position. The handle device further includes a detection device including a first detection element for detecting a telescopic state of the handle device, and a control device mounted to the operation member and electrically or communicatively connected to the first detection element. The control device is configured to control the control unit according to detection information from the first detection element.

A method for the operation of a self-propelled agricultural working machine has at least one working element and a driver assistance system for generating control actions within the working machine. A sensor arrangement for generating surroundings information is provided, and the driver assistance system generates the control actions based on the surroundings information. The sensor arrangement comprises a camera-based sensor system and a laser-based sensor system, each of which generates sensor information regarding a predetermined, relevant surroundings area of the working machine. The sensor information of the camera-based sensor system is present as starting camera images. The starting camera images are segmented into image segments by an image processing system according to a segmentation rule, and the segmented camera images are combined by a sensor fusion module with the sensor information from the laser-based sensor system.

A protective enclosure or cab for an operator of a walk-behind or mechanical device, such as a snow blower, engine-driven snow thrower, ride-on tractor, or the like, is provided. The protective enclosure or cab includes an inflatable frame structure which supports a plurality of transparent, flexible windows or a single sheet of transparent material such as a curtain. When inflated, the protective cab is detachably coupled to the walk-behind or mechanical device and surrounds an operator of the walk-behind or mechanical device protecting the operator from the environment such wind, rain, snow or the like, while providing an unobstructed view of the surrouding environment. When deflated, the protective enclosure or cab can be folded into a small volume to be placed in a storage device which can be coupled to the walk-behind or mechanical device.