Abstract: A press comprises a pressure vessel having an internal closure. The internal closure comprises a cover and a number of elements for transmitting forces in pressurized operation between the cover and the inner wall of the pressure vessel. Each element has a first contact surface adapted to fit a contact surface of the cover and a second contact surface adapted to fit a contact surface of the inner wall of the pressure vessel. The elements are movable away from the contact surface of the cover and the contact surface of the inner wall of the pressure vessel in the direction of the longitudinal center axis of the pressure vessel. A method is provided for opening a pressure vessel.

Abstract: The present invention relates to a press which comprises a pressure vessel having an internal closure. The internal closure comprises a cover, a number of elements for transmitting forces in pressurized operation between the cover and the inner wall of the pressure vessel. Each element has a first contact surface adapted to fit a contact surface of the cover and a second contact surface adapted to fit a contact surface of the inner wall of the pressure vessel. Said elements are movable away from said contact surface of the cover and said contact surface of the inner wall of the pressure vessel in the direction of the longitudinal centre axis of the pressure vessel. The invention also relates to a method for opening a pressure vessel.

Abstract: A vibratory plate includes a sprinkler device (3) for wetting the underside of a base plate (2) of the vibratory plate (1). The vibratory plate also includes a water tank (4) and the sprinkler device (3) has an outlet (8) for passing the water, a valve (11) to control the release of water and a knob (5) for the operation of the valve. A channel (6) guides the released water and is arranged along the front edge of the base plate (2). The channel (6) is arranged with descending inclinations along and from the middle of its length and to both side edges of the base plate (2). The outlet (8) is only arranged for the release of water to the middle of the channel (6).

Abstract: The present invention relates to a press which comprises a pressure vessel having an internal closure. The internal closure comprises a cover, a number of elements for transmitting forces in pressurised operation between the cover and the inner wall of the pressure vessel. Each element has a first contact surface adapted to fit a contact surface of the cover and a second contact surface adapted to fit a contact surface of the inner wall of the pressure vessel. Said elements are movable away from said contact surface of the cover and said contact surface of the inner wall of the pressure vessel in the direction of the longitudinal centre axis of the pressure vessel. The invention also relates to a method for opening a pressure vessel.

Abstract: A vibratory plate includes a sprinkler device (3) for wetting the underside of a base plate (2) of the vibratory plate (1). The vibratory plate also includes a water tank (4) and the sprinkler device (3) has an outlet (8) for passing the water, a valve (11) to control the release of water and a knob (5) for the operation of the valve. A channel (6) guides the released water and is arranged along the front edge of the base plate (2). The channel (6) is arranged with descending inclinations along and from the middle of its length and to both side edges of the base plate (2). The outlet (8) is only arranged for the release of water to the middle of the channel (6).

Abstract: A push-stop bar unit (4) with legs (8) is included in a safety arrangement against crush for a self-propelled roller (1) controlled by an operator on foot. The push-stop bar unit (4) is pivotably connected via the legs (8) to the roller (1) controlled by an operator on foot. The legs (8) are made of plastic, rubber or composite materials.

Abstract: The present invention relates to a press which comprises a pressure vessel having an internal closure. The internal closure comprises a cover, a number of elements for transmitting forces in pressurised operation between the cover and the inner wall of the pressure vessel. Each element has a first contact surface adapted to fit a contact surface of the cover and a second contact surface adapted to fit a contact surface of the inner wall of the pressure vessel. Said elements are movable away from said contact surface of the cover and said contact surface of the inner wall of the pressure vessel in the direction of the longitudinal centre axis of the pressure vessel. The invention also relates to a method for opening a pressure vessel.

Abstract: The invention is directed to an arrangement for cooling the hydraulic fluid in a hydraulic-powered vibrating compactor. The arrangement includes a hydraulic pump (6) of the compactor. The hydraulic pump (6) is provided with a through shaft having a fan wheel (7) mounted on the free end (8) thereof. The fan wheel (7) is located to draw cooling air (15) through a duct (10) formed by a tunnel-shaped hydraulic fluid reservoir (9). This arrangement reduces the temperature of the hydraulic fluid in the hydraulic-powered vibrating compactor.

Abstract: The invention is directed to an IR unit for a remote-controlled vibrating plate operated by control signals from a handheld control unit. The control signals from the control unit are transmitted to the vibrating plate (1) by infrared light. The IR eye (5) of the vibrating plate is mounted on a depressable mounting plate (6) and is protected by a spoke-shaped protective grill (13) to prevent damage to the eye from the action of an external force.

Abstract: A vibrating compactor is equipped with a handle assembly (20) in which the vibrations are damped via vibration dampers (8) with an arrangement to limit the resilient movement of the vibration dampers. The handle assembly includes a lower section (5) and an upper section (9) joined by the vibration dampers. The lower section of the handle assembly is provided with through spindles (11) which can be positioned and tightened in elongated through openings (10) in the lower section. The spindles (11) extend through corresponding oblong holes (12) in the upper section (9) of the handle assembly. The holes (12) each widen toward one end and narrow toward the other end.

Abstract: The invention relates to an arrangement and method for operating a self-propelled vibratory plate device. The vibratory plate of this device receives its vibratory motion from counter-rotating eccentric parts driven by an internal combustion engine. According to the method, the vibratory plate is stopped with a deadman's handle mounted on the device without the engine stopping. The method is realized with the arrangement of the invention which includes the deadman's handle. The deadman's handle is connected to the engine's fuel control and a centrifugal clutch between the engine and the eccentric parts is engaged only when the speed of the engine is above idle speed. A cam is provided with an interacting support which limits the angular movement of the deadman's handle to a position which corresponds to the idle speed of the engine.

Abstract: A hand-operated forward-reverse vibrating plate compactor which includes a vibrating assembly having two counter-rotating eccentrics. The vibrational force generated by the eccentrics is directional and the forward and reverse motion of the vibrating plate compactor is achieved by changing the phase position of the eccentrics relative to each other. This change in the phase position is accomplished smoothly by means of a hydraulic servo control system which permits a continuously variable adjustment of the speed and intensity of the vibration of the vibrating plate compactor to be made.

Abstract: A self-propelled grinding or milling apparatus for finishing a surface of concrete or similar hard material such as a floor, which includes a frame supported on a number of wheels. A rotating grinding or milling tool is mounted in the frame and has a vertical shaft which is suspended and loaded with weights so that the pressure of the wheels on the surface is maintained at a constant level at varying working pressures of the tool. The apparatus is arranged to tilt laterally by means of a raising and lowering device which acts on the non-steerable wheels so that the pressure of the tool on the floor differs on the right-hand and left-hand side of the apparatus and so gives rise to frictional forces which cause the apparatus to move either in the forward direction or the rearward direction at a speed which is dependent on the magnitude of the tilt.

Abstract: The invention is directed to a rotary tool for attachment to a machine for working and smoothing an even surface of a base made of cement, concrete or similar hard material. The machine includes a multi-wheeled vehicle and at least one tool drive shaft arranged on the vehicle. The tool drive shaft defines a longitudinal axis extending perpendicularly to the base to be worked and has a tool holder for holding the rotary tool. The rotary tool includes a plate on which a plurality of cutter-wheel units are mounted about the periphery thereof. Each of the cutter-wheel units includes a frame attached to the plate and axles mounted so as to define respective rotational axes parallel to the plate and substantially parallel to a radius passing through the longitudinal axis of the tool drive shaft. A plurality of cutter wheels is mounted on the axles so as to rotate freely with respect thereto.

Abstract: An apparatus for bending a substantially planar, plastically deformable sheet-metal blank or plate into a shell of cylindrical curvature comprises two normally provided spaced apart die bars mounted on a die bed plate and a punch edge provided on a punch member, the punch edge being arranged, upon stepwise advancement of the plate, to press said plate down between the two spaced apart die bars. For the purpose of bending respective end parts of the plate, which is effected by so-called eccentric bending, the apparatus includes at least one additional die bar which is located at a greater distance from the end in question of the plate and at a higher level than that one of the two normally provided die bars located furthest from the end of the plate, and functionally replaces the one normally provided die bar. Preferably the apparatus includes a further die bar located outside each of the two normally provided die bars.

Abstract: A machine for finishing a flat surface, for example a floor made of cement, concrete, or similar hardened material, includes a chassis supported by at least three wheels arranged to carry the weight of the chassis. A grinding tool, preferably a grinding wheel, is mounted to the chassis to rotate about a vertical rotational axis and to rest on the floor when grinding work is in progress. The grinding wheel is mounted to move freely in the vertical direction relative to the chassis such that the weight of the grinding wheel is carried by the floor, and the grinding pressure is readily adjustable for differing applications.

Abstract: A concrete floor finisher for finishing newly-placed concrete. The machine comprises a rotor hub, a plurality of rotor arms on the hub for rotation about an axis, a blade pivotable on each arm, and a motor for driving the rotor hub. The pitch of the blades is adjustable depending upon the condition of the wet concrete, by a piston and cylinder centrally located about the axis of rotation of the rotor, and a stud connected at one end to the blades and at its other end engaging a portion of the piston to adjust the pitch of the blades in response to the axial displacement of the piston.