Abstract: A device for the pulsed release of an amount of fluid stored in a storage housing (2) has a locking device (7) formed by a piston-cylinder arrangement (8). The arrangement has a cylinder housing (9) subdivided into a first working chamber (11) and a second working chamber (12) by a working piston (10). An electrorheological or magnetorheological valve (14) in the form of a gap (15) or an opening is arranged between the working chambers (11, 12) in the circumference (13) of the working piston (10) or in the working piston (10).

Abstract: A device for the pulsed release of an amount (3) of fluid that is stored in a storage housing (2) includes a piston (5) biased by a first spring (4) and movable within the storage housing (2) to dispense the fluid by the spring bias, when triggered by an actuator (6) to release a lock holding the piston in place (7). The lock (7) has individual catches (8) keeping the piston (5) in its pretensioned position and, when actuated by the actuator (6), releases the piston (5).

Abstract: A safety device for containers pressurized with gas safeguards the gas side of the working chamber of hydraulic accumulators. A relief apparatus (2) reduces an elevated gas pressure in the container (3) caused by heat. The relief apparatus (2) is a component loaded under the influence of a shear force or compressive force. The shape change of the component under the influence of heat on the safety device (1) in a space (5) closed to the outside occurs such that a fluid-conducting connection (6) from the inside of the container (3) to the outside in the direction of the surroundings is enabled.

Abstract: A hydrostatic drive system has a motor-driven hydraulic pump (1) connected to at least one hydraulic drive unit (7) by a first working line (19) and a second working line (21) forming a hydraulic circuit. The drive unit is connected to a gear set (1, 3). A first hydraulic accumulator (53) for accumulating pressure energy can be connected to one of the working lines (19, 21). A second hydraulic accumulator (55) can be connected to the other working line (19, 21). A valve device (V1, V2) permits the segment (23, 25) of each working line (19 or 21) extending to the drive unit (7) to be separated to separate an accumulator part (33) from the part of the circuit with the hydraulic pump (13). The accumulator part includes the hydraulic accumulators (53, 55) and at least one drive unit.

Abstract: A bellows accumulator has a bellows (13) serving as a movable separating element between a gas side (11) and a fluid side (21). At the movable bellows end during expansion and contraction in the accumulator housing defining a longitudinal axis (9), a closure body (25) closes off the interior space (33) of the bellows (13) in a fluid-tight manner. At its other bellows end (27), the bellows is immovably fixed to the accumulator housing (1). The immovable bellows end (27) is fixed to an end body (31) fixed to the housing, which end body (31) is in the form of a disk with region (37) projecting axially into the interior (33) of the bellows (13) from the main plane (35) of the disk. At least one fluid passage (41, 43) is formed on the projecting region (37), which fluid passage (41, 43) connects the interior space (33) associated with the fluid side (21) to a fluid connection (17) of the accumulator housing (1).

Abstract: A guiding device for metal bellows (19) includes a terminal element (35) on a bellows end (31). The terminal element is movable along the wall of a housing (1) during expansion and compression of the bellows (19). A guide (47) is interposed between the terminal element and the housing (1). The guide has an annular element (47) surrounding a peripheral zone of the terminal element (35). The annular element, on its outer periphery, forms first annular sections radially spaced apart from the wall of the housing (1) and separated from each other by second annular sections radially projecting over the first annular sections.

Abstract: The invention relates to a gas cylinder, in particular a high-pressure gas cylinder, the cylinder tube (1) of which has a piston rod (9) that is passed through a sealing arrangement (13) by which the gas pressure prevailing in the pressure chamber (23) of the cylinder tube (1) is sealed off against the ambient pressure. The invention is characterised in that the scaling arrangement (13) has a compressed oil chamber (33) between at least one sealing element (31) adjacent to the pressure chamber (23) and at least one more sealing element further away from the pressure chamber (23), into which oil chamber oil can be pressed in by means of a supply device (51) at a pressure that is equal to or higher than the respective gas pressure prevailing in the pressure chamber (23) of the cylinder tube (1).

Abstract: A dual piston accumulator, in particular for a hydrostatic hybrid drive system for vehicles, replaces a high pressure hydro accumulator and a low pressure hydro accumulator. Inside a single accumulator housing (2) extending in the axial direction in a single piece over a high pressure part (4) and a low pressure part (6), an accumulator piston (8, 10) defines a high pressure-sided fluid chamber (16) and a low pressure-sided fluid chamber (18). Both chambers border an intermediate piece (12) separating the high pressure side (4) from the low pressure side (6). A common piston rod (14) extends through the intermediate piece for both accumulator pistons (8, 10). The wall width of the housing (2) corresponding to the high pressure part (4) is greater than the opposite reduced wall width corresponding to the low pressure part (6).

Abstract: A pressure vessel for receiving at least one fluid medium has a first shell (1) and a second shell (3) at least partially encompassing the first shell (1). The first shell (1) has, at least at one of its ends, a collar portion (5) having a securing element (15) that forms an opening (13) for supplying and discharging the medium. A support element (19) in the form of a split ring surrounds the opening (13), is provided inside the container and has a contact surface (39) adapted to the curved shape of the first shell (1) inner side attached to the collar portion (5). The contact surface is able to be pressed onto the first shell inner side attached to the collar portion (5). The contact surface is able to be pressed onto the first shell (1) using a pressing device (43, 45).

Abstract: The invention relates to a media separating device (1), in particular a hydraulic accumulator (3), having a movable separating means (5) for separating two media (7, 9) which are received in media chambers (11, 13) differing from each other, wherein said media separating device is characterized in that, by means of a measuring apparatus (15, 115), it is possible to detect an overflow of at least one medium (7, 9) from a medium chamber (11, 13) via the separating means (5) into the other medium chamber (11, 13) having the other medium (9, 7).

Abstract: Sensor device (1) for detecting flowable media (3, 3?), and pressure device (5) and measuring method for operating the sensor device (1). A sensor device (1) for detecting flowable media (3, 3?), in particular in the form of fluids (9) which can be received in pressure devices (5), such as pressure containers (7) or pressure lines, with at least one sensor element (11) is characterized in that the respective sensor element (11) has an oscillation device (13) which is excited to produce oscillations under the action of a field (15) of a field generation device (17), the oscillating behaviour of which oscillations changes upon inflow of the respective medium (3), and in that the change can be detected by a measuring device (19).

Abstract: A hydraulic accumulator, preferably a membrane accumulator, in particular for damping pulsations in fluid circuits, includes an accumulator housing (12) with at least one inlet (14) and an outlet (16) for the fluid for damping. A separating element (18), preferably in the form of a membrane, separates a gas reservoir (20) from a fluid chamber (22) within the accumulator housing (12). A hydraulic accumulator with high working capacity of high reliability which little space requirement despite high accumulation capacity for the working gas in the gas reservoir (20) can be achieved. A support device (24) within the accumulator housing (12), extends within the gas reservoir (20) and forms a possible support for the separating element (18). The gas reservoir (20) of the accumulator housing (12) is sufficiently large in dimension that the total necessary gas volume is retained within the accumulator housing (12) itself.

Abstract: A hydraulic accumulator, especially a pulsation damper, comprises a metal bellows (19) that has a terminal element (35) which can be displaced along the wall of a housing (1) at least on one bellows end (31) during expansion and compression of the bellows (19), a guiding means (47) being interposed between the terminal element and the housing. Said guiding means comprises, on at least one peripheral zone of the terminal element (35), on its outer periphery, first annular sections (51) that are radially spaced apart from the wall of the housing (1) and that are separated from each other by second annular sections (53) and radially project over the first annular sections (51).

Abstract: A guiding device for a metal bellows (3), on at least one bellows end (37) movable along the wall of a housing (10) during the expansion and contraction of the bellows (3). A guiding element is provided between the end body and the housing (10). The guiding element is formed by a plurality of separate guiding bodies (49) disposed in intervals from each other on the circumference of the end body (39).

Abstract: A pressure tank, in particular hydraulic accumulator (3, 5), has a parting element (1) separating a space (11) for a first gaseous working medium from a space for a second fluid working medium in the tank. The parting element is flexible, can move under deformation and defines a domed main parting plane extending from an annular edge (13). The parting element (1) is produced from a substance having a fluoroplastic material, preferably a substance composed entirely of fluoroplastic material.

Abstract: A method produces piston-type accumulators, including an accumulator housing (10) and a separating piston, which can be displaced in a longitudinal direction inside the accumulator housing (10) and separates two working spaces located in the housing. One end face of the accumulator housing is sealed by cover part (20). The cover part (20) is fixed on one side (40) via the free longitudinal edge (32) of the accumulator housing (10). The edge is displaced towards the cover part (20), such that a functionally and positionally secure connection of a cover part is ensured within the housing of a piston-type accumulator without using standard threaded connections.

Abstract: A piston-type accumulator has: a) an accumulator housing in the form of a cylinder tube (1) made of magnetizable material, which defines an axial direction of the housing; b) a piston (3), which can be axially displaced over a stroke path inside the cylinder tube (1) and which forms a moving separating element that, inside the accumulator housing, separates two working spaces (7 and 9) from one another; c) a magnet arrangement (29, 31, 35), placed on the piston (3) and generating a field on the wall of the cylinder tube (1), and; d) a magnetic field sensor device located on the exterior of the cylinder tube (1) and having at least one Hall sensor (51). The Hall sensor is mounted on the exterior of the cylinder tube (1) and responds to the field generated by the magnet arrangement (29, 31, 35) on the piston (3) to determine the position of the piston (3) along the stroke path.

Abstract: The invention relates to an hydrostatic hybrid drive system for road vehicles, said system comprising a pump/motor unit (1) which is or can be connected to the powertrain of the vehicle, can be controlled by means of a control unit (5) in a pump or motor operation and can be connected to a high-pressure hydraulic accumulator via a first working line (7) that can be closed by means of a control valve (45) and to a low-pressure hydraulic accumulator via a second working line (9). The high-pressure hydraulic accumulator and low-pressure hydraulic accumulator are formed by a double-piston accumulator (11), in which a high-pressure side and a low-pressure side having respective accumulator pistons (15, 17) are formed in an accumulator housing (13), wherein the fluid chambers (23 and 25) of the high-pressure side and the low-pressure side are separated by a central housing part (21) through which the common piston rod for both accumulator pistons (15, 17)extends.

Abstract: An attenuation device, particularly a pulsation attenuator, has a casing (1) defining a fluid chamber (11) through which a fluid may flow along a flow axis (7), and has an attenuation element made of a resilient material located within the casing (1). The attenuation element has at least two annular bodies (15, 17) that are disposed in an at least partially overlapping manner, surrounding the flow axis (7) at least partially.

Abstract: A pressurized container includes two plastic casings (12, 14) and produces a leakproof container or storage arrangement which is economical to produce. A gap opening (24) between the casings (12, 14) extends up to a point at which the casings (12, 14) are positioned together in a coaxial manner. An external support ring (22) with a wedge-shaped tapering (26) extends to that point and is embodied as an individual piece or has at least two metal, ring-shaped individual segments (28, 30).