Abstract: A skid plate for a robotic lawnmower, comprises an approximately circular plate with a central opening (13), for a hub (6b), and means of attachment (14, 15). The skid plate (2b) is attachable to the robotic lawnmower. An edge portion (7) of the circular plate is bent to extend transversally to a main plane (8) of the circular plate. An outer peripheral edge (11) thereof extends in a single plane. A robotic lawn mower comprises an electric motor connected to a rotatable cutting head (1b). The cutting head is connected to a cutting disk (3b) with at least one knife (4b) at its periphery. A skid plate (2b) as above is arranged below the cutting disk (3b).

Abstract: A lawnmower cutter assembly (22) comprises a knife carrier arrangement (26) and a skid plate arrangement (30), which are axially held between an axial stop shoulder (60) of the cutter drive shaft (34) and an end piece (54) rigidly connected to the cutter drive shaft (34), the end piece (54) thereby vertically carrying the skid plate arrangement (30) and the knife carrier arrangement (26). The cutter assembly (22) may be attached to a lawnmower, which may be a robotic lawnmower, by positioning the knife carrier arrangement (26) and the skid plate arrangement (30) on the cutter drive shaft (34); and thereafter, axially locking the axial position of the knife carrier arrangement (26) and the skid plate arrangement (30) in relation to the cutter drive shaft (34).

Abstract: The present disclosure relates to a robotic lawnmower cutting deck (130) comprising a cutting system (131) which in turn comprises at least two cutters (132a, 132b, 132c), with a cutting disc (133a, 133b, 133c) and cutter motor (134a, 134b, 134c). The cutters (132a, 132b, 132c) are supported by a cutter support beam (135) which has a longitudinal beam extension (L1) and in turn is supported at respective supporting positions (135a, 135b) by a corresponding first link arm (136a, 136b) and a corresponding second link arm (137a, 137b).

Abstract: A self-propelled robotic lawnmower (1) is disclosed comprising a lawnmower body (3.1, 3.2, 3.3),a body part (5.1, 5.2, 5.3, 5.4, 5.5) movably arranged in relation to the lawnmower body (3.1, 3.2, 3.3), and an elongated sensor element (7, 7) extending in an interface between the lawnmower body (3.1, 3.2, 3.3) and the body part (5.1, 5.2, 5.3, 5.4, 5.5). The elongated sensor element (7, 7?) is configured to generate a signal when a portion of the elongated sensor element (7, 7?) is subjected to a change in thickness in a direction perpendicular to a direction of elongation of the elongated sensor element (7, 7?) by a relative movement between the body part (5.1, 5.2, 5.3, 5.4, 5.5) and the lawnmower body (3.1, 3.2, 3.3).

Abstract: The cutting tool has a shaft and spherical cutting head having a groove defined therein extending from a top portion to a bottom portion of the cutting head. A disc-shaped first blade is placed in the groove. The first cutting blade has a peripheral cutting edge following a peripheral surface of the spherical cutting head. The peripheral cutting edge extends beyond the peripheral surface of the cutting head. The cutting tool is rotatable and in operation may be used to cut into a wood piece and create a crate-like cavity.

Abstract: The invention is a snap locking angle adjustable device, particularly applicable to carpenter's squares. Carpenter's squares, being used in rough environment, must be simple to adjust while providing robust snap locking at high angle precision. Prior art attains this by protruding steel balls, attached around the pivot axis of the square's handle, pressed strongly against a hole punched area around the pivot axis of the square's blade-balls aligns to holes gives the snap locking. The problem is to simplify manufacturing. The invention comprises components with moulded alignment structures. These components are the complete pivot members (handle or blade) themselves, or are separately attached to the pivot members. The components, and optionally, are sandwiched, alignment structures against each other, and axially pressed together strongly by a spring held in compression by a press frame that also may constitute a pivot shaft for the pivot members.

Abstract: The invention is a snap locking angle adjustable device, particularly applicable to carpenter's squares. Carpenter's squares, being used in rough environment, must be simple to adjust while providing robust snap locking at high angle precision. Prior art attains this by protruding steel balls, attached around the pivot axis of the square's handle, pressed strongly against a hole punched area around the pivot axis of the square's blade—balls aligns to holes gives the snap locking. The problem is to simplify manufacturing. The invention comprises components with moulded alignment structures. These components are the complete pivot members (handle or blade) themselves, or are separately attached to the pivot members. The components (1, 2), and optionally (3, 4), are sandwiched, alignment structures against each other, and axially pressed together strongly by a spring (5) held in compression by a press frame (6) that also may constitute a pivot shaft for the pivot members.

Abstract: The invention relates to a polishing drum (1) which is intended particularly for polishing the edge surfaces and outer surfaces of straight and curved workpieces (101) and which carries an abrasive sheet (70) on a center cylinder (2) and is intended to be driven for rotation by a drive means (100). The polishing drum includes an elastic sleeve (60) or cloth which can be tensioned around the cylinder (2) and which forms an underlying supportive surface for the abrasive sheet (70). The center cylinder (2) has an axially extending slot (6) and means (40, 61) for tensioning the elastic sleeve (60) or cloth and the abrasive sheet (70) are provided inwardly of the slot (6).

Abstract: A device in a plane supported between columns by means of hooks cooperating with the columns in a locking position for adjusting and locking the plane in different positions along the columns. In known devices of this type shifting of the plane from one position to another is troublesome and time-consuming and, further, no change of the distance between the columns is permitted. In order to make this possible the hooks (2) are connected to the plane (5) by means of links (3) articulatedly connected with the plane and pivotally connected with each their link (3) in a hinge (8), said links being pivotable, one before the other, to withdraw the respective hook (2) from locking engagement with the column (1), by which displacement of the plane can take place in one direction as well as the other, a support means (8) being associated with each hook (2) and serving in locking position as a support for the hook against the respective column (1).