Abstract: A wheel lifting device comprising a base structure with support means for being supported by a ground surface and a lifting frame with at least one wheel support member and a frame leg which extends upwardly at an angle to the ground surface. A link mechanism is connected to the base structure and to the lifting frame and a pivotal manoeuvring lever is connected to the link mechanism for lifting the lifting frame relative to the base structure. The blocking device for locking the manoeuvring lever at any desired pivotal position comprises a weight which is slidable along the frame leg and arranged to intersect the pivotal movement path of the manoeuvring lever and to be brought into frictional engagement with the frame leg when influenced by a force generated by the manoeuvring lever in order to block the lifting frame from downward movement relative to the base structure.

Abstract: A wheel lifting device comprising a base structure with support means for being supported by a ground surface and a lifting frame with at least one wheel support member and a frame leg which extends upwardly at an angle to the ground surface. A link mechanism is connected to the base structure and to the lifting frame and a pivotal manoeuvring lever is connected to the link mechanism for lifting the lifting frame relative to the base structure. The blocking device for locking the manoeuvring lever at any desired pivotal position comprises a weight which is slidable along the frame leg and arranged to intersect the pivotal movement path of the manoeuvring lever and to be brought into frictional engagement with the frame leg when influenced by a force generated by the manoeuvring lever in order to block the lifting frame from downward movement relative to the base structure.

Abstract: A wheel lifting device comprising a frame, a wheel support which is fixed to the frame and a manually manoeuvrable jack. The frame comprises guiding means which are arranged to receive at least two vertical bars of a two-wheeled tiltable hand cart and to guide the frame rectilinearly along said bars during vertical displacement of the frame relative to the handcart. The jack comprises an eccentric which is rotationally fixed to the frame or arranged to be rotationally fixed to the hand cart and which exhibits a peripheral support surface which is arranged to bear against hand cart or the frame respectively.

Abstract: Visor comprising a network structure formed of expanded metal, which network structure has a general extension plane (113, 114, 213, 214) and is formed of wire portions (11, 111, 211) and connecting portions (12, 112, 212), the respective ends of four wire portions (11, 111, 211) being joined in each connecting portion (12, 112, 212), and which wire portions (11, 111, 211) have substantially rectangular cross sections having long sides (111A, 211A) and short sides (111B, 211B). The wire portions (11, 111, 211) are arranged such that the long sides (111A, 211A) of their cross sections have a lesser angle to the general extension plane (113, 114, 213, 214) of the network structure than do the short sides (111B, 211B). The invention also relates to a method for use in the production of such a visor.

Abstract: Arrangement for securing a hearing protector to a helmet, which arrangement comprises a cap holder piece (102) and a helmet piece (101). The cap holder piece contains a rotary plate (103), a bistable element (104) and a cap holder element (105), which is secured by means of the bistable element to the rotary plate to allow a hearing protection, secured to the cap holder element, to take up a tilted out and a tilted in position relative to the rotary plate. The helmet piece comprises means (112, 112?) of attachment to a helmet and a receiving piece (111), in which the rotary plate is secured, able to turn about an axis of rotation, which receiving piece includes a resilient tongue (113) essentially parallel to the axis of rotation and a first stop piece (116) which, under the action of the resilient tongue and in cooperation with a second stop piece (132) arranged on the rotary plate, releasably maintains the rotary plate in a first rotational position relative to the receiving piece.

Abstract: Tool for injection-molding a hearing protection cup which includes a curved shell with an opening for receiving an ear, and a washer which extends around the opening and is connected to the edge thereof. The washer projects inward across the opening along at least two opposite sides thereof and is intended to support a sealing and comfort ring which is intended to rest against the head. The tool includes a common mold cavity intended to produce the shell and the washer in one piece, and an insert which can be introduced into this mold cavity for forming the inner surfaces of the shell and of the washer. The insert is divided into at least three portions by means of dividing planes which extend in the same principal direction as the opposite sides of the opening. The invention also relates to a method for producing a hearing protection cup, and to a hearing protection cup produced using the method.

Abstract: Ear defenders comprising an elastic headband (1) and an ear muff (4) arranged on the inside of each leg (2) of the headband. The ear muffs (4) are arranged displaceably along the insides of the legs (2) from the end positions of the legs and so far along the legs that the free ends (7) of the latter can be bent towards and connected to one another, so that the legs completely surround the ear muffs (4). This means that the ear defenders can be compressed before storage in, for example, a pocket.

Abstract: An arrangement in hearing protection devices, headphones and the like of the type comprising a frame (1) and plugs (2) arranged at both ends of the frame. Each of the plugs is pressed into contact with the orifice of the related auditory meatus and may also partly enter the passage. The frame (1) is provided with means (3) that contact the skull bone at the related ear for the purpose of dampening vibrations in the frame. Those means can be shaped like bent or enlarged portions of the frame adjacent to each end thereof, said portions being arranged, when the device is in use, to be held in pressure contact against the skull bone in the area of the respective ear.

Abstract: A handle for hand-held tools, particularly files, that have an end portion (3) for insertion into the handle (1). The handle includes at least two parts (4, 5) which are separated in the insertion direction of the end portion of the tool and includes end-portion guides (6). One guide has the form of a hole (6) in one handle part (4). A surface on the guide in the other handle part (5) intended for coaction with the end portion (3) of the tool is displaced laterally in relation to a corresponding surface in the hole (6). The two handle parts (4, 5) are resiliently movable relative to one another, to permit reduction in the displacement between the surfaces in conjunction with inserting the end portion (3) of the tool into the handle (1). The end portion of the tool is automatically clamped firmly in the handle as the handle parts tend to spring back to their original positions.

Abstract: A self-closing funnel includes a downwardly narrowing flow-receiving part 1, a tubular spout 2 extending from the receiving part, and a float 5 which is movable within the spout. The funnel further includes a float-control valve 11, 12 and a permanent magnet 10 which influences the closing movement of the valve. The funnel includes a spring 9 which in the active state of the float counterbalances an essential part of its intrinsic weight, and a constriction 11 provided upstream of the float is configured so that the flow area 8 through the construction is smaller than the flow area between the spout and the float.

Abstract: A screw joint between two components, such as the rotor (3) and a lid locking ring (5) of an ultracentrifuge. During rotation the forces transferred by the screw joint and/or the centrifugal forces acting on the components tend to give rise to uneven distribution of the load between the threads of the screw joint. For distributing the forces transferred by the screw joint more uniformly, one of the components (3, 5) includes, a part (7) intended to be deformed due to the rapid rotation of the component to strive to rotate the component about axes perpendicular to axial sections through the center axis of the screw joint. In this way, variable contributions to the radial deformation of this component are produced along the axial extension of the screw joint, so that the load distribution is equalized between the screw threads.

Abstract: An acoustic ear muff includes a pad or cup (2) which is made of rigid material and incorporates an opening for receiving one ear of the wearer, and a resilient sealing annulus (10) intended for abutment with the head of the wearer, and also resilient pressure-exerting means (5) connected to the shell of a protective helmet (1), a head strap or like head gear. The ear muff provides good acoustic damping and a high degree of comfort, owing to the fact that the resilient pressure-exerting means is configured to produce a low pressing force substantially independently of head sizes which vary within given limits. The pressure-exerting means includes, to this end, a spring element in the form of a combined torsion and bending spring.

Abstract: An annular or closed loop rotatable frame or `flyer` (1), such as is used in a stranding machine of type, in which two or more wires, fibres or strands are stranded to a cable, e.g. intended for telecommunication, the flyer being arranged to rotate around one or more bobbins (10, 11). The frame (1) is journalled in two diametrically opposite points (8, 22) and is prestressed at these two journal points in a direction perpendicular to the centrifugal force produced by the rotation. In this way a bending moment in the opposite direction is produced making it possible to increase the speed of rotation of the flyer.