The invention relates to a method for producing hybrid pipes having flange connections or screw-in connections arranged at the ends of said hybrid pipes, wherein a flange connection or screw-in connection is welded to a pipe section on at least one side. A fibre composite material is then wound around the pipe section and around part of the flange connection or screw-in connection which is welded on at least one side. The invention further relates to hybrid pipes produced according to the aforementioned method.
F16L 9/147 - Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
The present invention relates to a locking head for telescoping cylinders of a telescopic boom, which has a plurality of telescopic boom portions, and a housing which comprises at least one bolt-like cylinder locking body, which can be moved in and out of the housing in order to lock the locking head with a telescopic boom portion, and at least one bolt-like telescope locking body, which can be moved in and out of the housing in order to release the telescopic boom portion for a telescoping movement. The locking head has at least one electric actuator which is designed to actuate the at least one cylinder locking body and/or the at least one telescope locking body.
Locking device (10) for the telescopic cylinder of a telescopic boom comprising a plurality of telescopic stages. The locking device comprises a housing (12), at least one bolt (20) displaceably mounted in the housing for locking the telescopic cylinder with a telescopic stage, a yoke (30) displaceably mounted in the housing, which is movable into an unlocking position for releasing a locking bolt of the telescopic boom, and at least one blocking element (35), which blocks a movement of the bolt into its unlocking position when the yoke is in the unlocking position. The at least one bolt is preloaded into a locking position via at least one bolt return element (22) and can be displaced via at least one bolt actuator (24) into an unlocking position releasing the telescopic stage lock. The blocking element and the bolt can be at least partially displaced into a common insertion space of the housing. According to the invention, the bolt is preloaded into the locking position via at least two bolt return elements, wherein the blocking element is arranged between the bolt return elements as seen in the displacement direction of the yoke. The invention further relates to an implement, in particular a mobile crane, having a locking device according to the invention.
Disclosed is a method for repairing a piston-cylinder unit within a working machine or within an attachment, wherein a connection of the piston rod with the machine or implement structure is released and the piston rod, the piston and at least one bearing head is jointly removed from the cylinder housing as an assembly and replaced by a premounted substitute assembly consisting of piston rod, piston and at least one bearing head.
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
The present invention relates to a locking head for telescoping cylinders of a telescopic boom, which has a plurality of telescopic boom portions, and a housing (1) which comprises at least one bolt-like cylinder locking body (2), which can be moved in and out of the housing in order to lock the locking head with a telescopic boom portion, and at least one bolt-like telescope locking body (2), which can be moved in and out of the housing in order to release the telescopic boom portion for a telescoping movement. The locking head has at least one electric actuator (3) which is designed to actuate the at least one cylinder locking body and/or the at least one telescope locking body.
The present invention relates to a device for detecting leaks in a hydraulic cylinder, comprising: a first pressure sensor for detecting a pressure value in a first pressure chamber of a hydraulic cylinder, a second pressure sensor for detecting a pressure value in a second pressure chamber of the hydraulic cylinder, an evaluation unit for continuously detecting the pressure values of the first pressure sensor and the second pressure sensor, the evaluation unit being designed to detect a leak, preferably an internal leak, in the hydraulic cylinder that deviates from the norm based on the pressure values recorded by the first pressure sensor and the second pressure sensor.
G01M 3/32 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere
7.
Method for manufacturing a piston rod unit and a hollow shaft
A piston rod unit and a method for producing a piston rod unit, or a shaft, in light-weight construction, with a rod which is hollowly-drilled by means of a deep bore into the rod shank, and the resulting rod opening is closed subsequently by means of a forging process.
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
B23P 15/10 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass pistons
F16J 7/00 - Piston-rods, i.e. rods rigidly connected to the piston
The invention relates to an, in particular hydraulic, vibration damper with a cylinder which, in the interior, has a fluid chamber which is delimited axially by way of two cylinder covers and is filled with a fluid, a piston which is mounted such that it can be displaced within the fluid chamber of the cylinder and divides the fluid chamber into a first and a second chamber, and a piston rod which is connected to the piston, extends through at least one of the cylinder covers, and is mounted displaceably in the latter. The at least one cylinder cover, in which the piston rod is mounted, has a seal which seals the fluid chamber to the outside in a liquid-tight and/or gas-tight manner. According to the invention, a floating and contactless seal is additionally arranged between the fluid chamber and the seal.
F16F 9/20 - Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with the piston-rod extending through both ends of the cylinder
F16F 9/32 - Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium Details
F16F 9/36 - Special sealings, including sealings or guides for piston-rods
The present invention relates to a hydraulic cylinder which comprises: a cylinder housing, having a bottom wall and a circumferential sidewall; a cylinder piston, which is arranged to be displaceable backwards and forwards in the cylinder housing; and a piston rod, which is fastened to the cylinder piston and is hollow in construction, more particularly has a tubular form, the piston rod having a rod top on the end remote from the cylinder piston. The hydraulic cylinder is characterized in that the cylinder piston and the rod top are fastened to the piston rod by a tie rod running through the hollow piston rod.
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
10.
DEVICE AND METHOD FOR DETECTING LEAKAGE OF A HYDRAULIC CYLINDER
The present invention relates to a device for detecting leakage of a hydraulic cylinder, comprising: a first pressure sensor for capturing a pressure value in a first pressure chamber of a hydraulic cylinder; a second pressure sensor for capturing a pressure value in a second pressure chamber of the hydraulic cylinder; an evaluation unit for continuously capturing the pressure values of the first pressure sensor and of the second pressure sensor, the evaluation unit being designed to detect, on the basis of the captured pressure values of the first pressure sensor and of the second pressure sensor, a leakage, preferably an internal leakage, that deviates from the norm.
G01M 3/02 - Investigating fluid tightness of structures by using fluid or vacuum
G01M 3/32 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
The invention relates to a piston-cylinder unit with a cylinder and a piston rod movably mounted therein, wherein at least one piston bearing is provided in the region of the cylinder opening in order to support or guide the piston rod, and the piston rod bearing is formed in at least two parts.
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
12.
Method for repairing a piston-cylinder unit within a working machine
Disclosed is a method for repairing a piston-cylinder unit within a working machine or within an attachment, wherein a connection of the piston rod with the machine or implement structure is released and the piston rod, the piston and at least one bearing head is jointly removed from the cylinder housing as an assembly and replaced by a premounted substitute assembly consisting of piston rod, piston and at least one bearing head.
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
13.
Method for manufacturing a piston rod unit and a hollow shaft
The invention relates to a method for producing a piston rod unit, or a shaft, in lightweight construction, with a rod which is hollowly-drilled by means of a deep bore into the rod shank, and the resulting rod opening is closed subsequently by means of a forging process.
B23P 15/10 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass pistons
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
F16J 7/00 - Piston-rods, i.e. rods rigidly connected to the piston
B21J 5/02 - Die forgingTrimming by making use of special dies
F04B 1/04 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
F04B 15/02 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
The invention relates to a cylinder-piston device, having at least one inner tube (6) and at least one outer tube (7), the inner tube being mounted within the outer tube, at least one cylinder head (4), at least one piston rod bearing (3), and at least one sleeve (5).
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
The invention relates to a cylinder-piston device, comprising a cylinder (1), on the inside of which a seal is provided in the form of a liner, and at least one piston (2), at the radially outer side of which at least two outer sections (27, 28) are provided, which extend to different distances in the radial direction.
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
17.
CYLINDER-PISTON DEVICE HAVING A CYLINDER PRODUCED FROM A FIBRE-COMPOSITE MATERIAL
The invention relates to a cylinder-piston device, in particular a hydraulic accumulator, comprising a cylinder produced preferably from a fibre-composite material and at least one piston having a recess on at least one side and surrounded by at least one wall. The invention also relates to a hydraulic piston for a corresponding cylinder-piston device.
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
F15B 1/24 - Accumulators using a gas cushionGas charging devicesIndicators or floats therefor with rigid separating means, e.g. pistons
18.
METHOD FOR MANUFACTURING A PISTON ROD UNIT AND A HOLLOW SHAFT
The invention relates to a method for manufacturing a lightweight piston rod unit or shaft comprising a rod (20) that is drilled hollow as a deep hole (21) is drilled into the rod shank, whereupon the opening created in the rod is closed using a forging process.
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
patents
