Abstract: A nibbling tool for contour cutting and for forming holes in a plate or the like, comprising one movable and one stationary member, and a supporting element with a shaft. The shaft has a first longitudinal axis, and the supporting element is rotatable about that axis by a motor, is adjustable in an axial direction, and may be set in a predetermined relationship relative to the stationary member. The movable element has a second longitudinal axis and is rotatable therearound. The axes subtend an acute angle with one another for the movable element to have a predetermined spaced relationship with respect to the supporting element, so that a plate may be inserted between the stationary member and a point of the movable member closest to the stationary member upon the supporting element having been set with respect to the stationary member.

Abstract: The trimming device has a blade driven by a shaft to have each end pass over cutting teeth at the edge of a circular cutting plate. The drive mechanism is a motor having an enclosed speed reducing unit for driving a shaft at a low speed when rotating the blade. The circular cutting plate is secured to the bottom of the motor housing through the center of which the driven shaft extends. A bail for a handle having a switch and a receptacle for the prongs of a plug on a cord is pivotally mounted on the housing to be positioned at a small angle to the circular cutting plate and 90.degree. therefrom in a vertical position. An extension handle may be applied to the end of the short handle to have the device swing therefrom.

Abstract: A wire cutter, particularly for cutting electrical connection wires, comprising a hollow shaft rotatably guided in a sleeve. Respective ends of the sleeve and the shaft have end faces with cutting edges which extend partially parallel to the rotation axis.

Abstract: Shearing means of a brushwood cutter has a rotor with a plurality of sickle-shaped cutters, and a plurality of stationary, triangular tooth-like edge protrusions of a plate on which the rotor rotates. The curve defined by the cutting edge of each of the sickle-shaped cutters is such that the tangent at any tangent point of the curve is disposed at between 50.degree.-80.degree., and preferably between about 60.degree.-80.degree., with respect of a radial line passing through such tangent point and through the center of rotation of the rotor to secure a smooth operation of the rotor and to render the device capable of cutting relatively large pieces of brushwood.

Abstract: A portable power tool particularly suited for use in removing plant growth and debris from the peripheral zones of upstanding heads for subterranean sprinkler systems. The tool is characterized by a portable frame adapted to be positioned above an upstanding sprinkler head in an operative relationship therewith, a drive shaft mounted on the frame having a rotatable cutting head connected thereto for cutting an annular swath about the sprinkler head in response to rotary motion imparted to the drive shaft, and an electrically energizable motor connected to the drive shaft and adapted to respond to a positioning of the frame into an operative relationship with a sprinkler head for imparting rotary motion to the drive shaft.

Abstract: A portable hand-held shear for cutting grass and the like comprising a housing enclosing an electric motor and forming a handle. The motor includes an output rotary shaft which, through a gear train, drives a rotary blade. A stationary bed knife assembly connected to the housing cooperates with the rotary blade in scissor-like fashion to cut grass.An improved cutting assembly is described in which the rotary cutting blade member, of particular design and positioned in a floating relationship above the stationary bed knife assembly, is inclined into engagement with the cutting teeth projecting from the stationary bed knife assembly, also of particular design, in such a manner to improve the performance of the shear. The improved cutting assembly further includes a rotary hub drive member which cooperates with the shear housing and the bed knife to eliminate clogging and partially overlaps the bed knife assembly's cutting teeth to further improve the performance of the shear.