EP4031781A1 - Gaskolbenspeicher - Google Patents
GaskolbenspeicherInfo
- Publication number
- EP4031781A1 EP4031781A1 EP20734664.4A EP20734664A EP4031781A1 EP 4031781 A1 EP4031781 A1 EP 4031781A1 EP 20734664 A EP20734664 A EP 20734664A EP 4031781 A1 EP4031781 A1 EP 4031781A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- piston
- hydraulic
- pressure
- cylinder base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000012530 fluid Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 230000036316 preload Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 60
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
- F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/066—Units characterised by the partition, baffle or like element
- F16F9/067—Partitions of the piston type, e.g. sliding pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/20—Accumulator cushioning means
- F15B2201/205—Accumulator cushioning means using gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/60—Assembling or methods for making accumulators
Definitions
- the invention relates to a gas piston accumulator according to the preamble of claim 1.
- a generic gas piston accumulator is designed as a piston-cylinder unit, the hydraulic space of which can be connected to a hydraulic line.
- a pressure piston preloaded with a preloading force acts on the hydraulic space in order to apply a reservoir pressure to the hydraulic fluid in the hydraulic line.
- the pretensioning force is achieved by a gas pressure in a gas space that is separated from the hydraulic space by the pressure piston.
- At least one cylinder base of the gas piston accumulator is assigned to the pressure piston as a mechanical stop.
- the pressure piston can be constructed from an axially recessed piston body, on the gas side and / or on the hydraulic side of which protrudes a stop structure which is reduced in area compared to the respective pressure piston side and which can be brought into pressure contact with the cylinder base.
- a separating device for fluid media is known from DE 10 2012 021 841 A1.
- a lightweight piston accumulator for vehicles is known from DE 10 2015 223 529 A1.
- a piston-cylinder unit is known from US Pat. No. 6,612,339 B1 or from WO 2011/023747 A1.
- a piston accumulator is known from EP 704 331 B1.
- the object of the invention is to provide a gas piston accumulator with a pressure piston, which can be implemented as a lightweight component and has an optimized mechanical stop structure.
- the object is achieved by the features of claim 1. Preferred developments of the invention are disclosed in the subclaims.
- the gas piston accumulator can no longer be single-walled, but rather double-walled, with an inner tube in which the pressure piston is axially guided, and with an outer tube that the inner tube moves at a distance to form an annular gap.
- the inner tube primarily forms the piston running surface for the pressure piston.
- the outer tube acts functionally independently of the inner tube, mainly as a load-bearing structure.
- the pressure piston can subdivide the inside of the inner tube into the hydraulic space and the gas space.
- the ring gap between the inner and outer pipe is separated from the hydraulic chamber in a fluid and pressure-tight manner.
- the annular gap is fluidically connected to the gas space.
- at least one flow passage can be provided with which the gas space formed in the inner tube is fluidically connected to the annular gap.
- a filling method can be used, which is used in a similar form in the field of shock absorber production.
- the gas piston accumulator can initially be installed completely and without pressure.
- the outer tube can then be pierced in one piercing step.
- the annular gap and the gas space connected to it in terms of flow can be evacuated through the tapping hole in the outer tube.
- the gas space can be filled with nitrogen.
- the piercing hole can be closed again with a spot weld or the like. Due to the double-walled nature of the gas piston accumulator, this type of filling is particularly suitable, since the outer tube no longer represents a functional surface (i.e.
- the housing of the gas piston accumulator can be completely welded, such as a shock absorber. Sealing rings between housing parts can be omitted and the gas piston accumulator housing can be implemented completely permeation-free. Furthermore, the preload pressure of the gas spring piston can be set exactly (due to small tolerances). In addition, a locking ring acting as a mechanical stop can be omitted.
- the Flydraulikraum the inner tube can be limited in the axial direction by a hydraulic-side cylinder bottom of the Gaskolbenspei chers.
- the opening (oil inlet) of the hydraulic line is formed in the cylinder base on the hydraulic side.
- the gas space located in the inner tube can be limited in the axial direction by a gas-side cylinder base of the gas piston accumulator.
- the gas-side cylinder bottom and the hydraulic-side cylinder bottom are arranged on the opposite side of the gas piston accumulator. Both cylinder heads (or at least one of them) can act as mechanical piston stops for the pressure piston.
- the two cylinder bottoms together with the outer tube can form an outer pressure piston accumulator housing in which the outer tube merges with the same material and / or as one piece into the two axially opposite cylinder bottoms.
- a dimensionally stable fastening of the inner tube in the gas piston accumulator is of great importance with regard to perfect operability.
- a pipe end on the hydraulic side of the inner pipe can be widened conically in the direction of the cylinder base on the hydraulic side in order to bridge the annular gap.
- the conically widened pipe end of the inner pipe on the hydraulic side can be attached to the inner circumference of the outer pipe and / or to the cylinder base on the hydraulic side.
- the inner pipe can also be widened ko cally at its gas-side pipe end, whereby the annular gap can be bridged.
- the gas-side tube end can also be attached to the inner circumference of the outer tube and / or to the gas-side cylinder base.
- the flow passage between the radial gap and the gas space can preferably be formed in the conically widened gas-side pipe end of the inner pipe.
- the inner circumference of the inner tube can form the pressure piston running surface, while the outer tube can be functionally decoupled from the pressure piston.
- the pressure piston running surface formed in the inner tube can preferably have a completely smooth cylindrical design.
- the cylinder bottoms of the gas piston accumulator act as mechanical stops for the pressure piston.
- the pressure piston In a completely emptied state, the pressure piston can be pressed against the hydrauliksei term cylinder base in the pressure system with the prestressing force generated in the gas space. With an excessively large pressure contact surface between the pressure piston and the cylinder base on the hydraulic side, the problem arises that the pressure piston tends to adhere to the cylinder base on the hydraulic side due to a suction cup effect.
- the piston surface facing the hydraulic-side cylinder base is divided into an axially recessed base surface from which a stop structure protrudes via an axial offset. In the completely emptied state, therefore, the entire pressure piston area cannot be in pressure contact with the hydraulic-side cylinder base over a large area, but only the stop structure with a smaller area.
- the stop structure of the pressure piston together with the cylinder base on the hydraulic side and the inner tube, delimits a filling chamber.
- hydraulic fluid can first flow into the filling chamber from the hydraulic line in order to support the detachment of the pressure piston (adhering to the cylinder base on the hydraulic side) from the cylinder base on the hydraulic side.
- the gas piston accumulator can be completely filled with hydraulic fluid after a charging process. When completely filled with hydraulic fluid, the pressure piston is pressed against the pre-tensioning force up to the pressure system against the gas-side cylinder base.
- the pressure piston can be divided up on its gas side into an axially recessed base area from which a stop structure protrudes via an axial offset.
- the stop structure When completely filled with hydraulic fluid (that is, the pressure piston is pressurized with the gas-side cylinder base), the stop structure, together with the gas-side cylinder base and the inner tube, can delimit a filling chamber. With the start of the discharge process, gas can relax from the annular gap via the flow passage into the inner tube and flow into the gas-side filling chamber, whereby the pressure piston is detached from the gas-side cylinder base.
- the contact area of the pressure piston on the respective cylinder base is reduced to a minimum by a special piston geometry. Nevertheless, it must be ensured that the forces acting on the pressure piston are uniformly transmitted, so that the pressure piston itself is only subjected to a low bending load.
- the piston material can be made of fiber-reinforced plastic with regard to a lightweight piston construction.
- the stop structure formed on the plunger has a sleeve-shaped extension protruding from the plunger base.
- the tubular extension is concentric to the pressure piston circumference and / or co- arranged axially to a gas piston accumulator longitudinal axis.
- the gas-side / hydraulic-side filling chamber can extend continuously in the circumferential direction around the sleeve-shaped extension.
- the stop structure has additional radial webs which protrude from the outer circumference of the sleeve-shaped extension. The radially outer web sides of which are arranged at a radial offset within the pressure piston in order to ensure a filling chamber that is continuously open in the circumferential direction.
- the sleeve-shaped extension of the stop structure of the pressure piston can define a blind hole-like recess radially on the inside.
- the free annular end face of the sleeve-shaped extension of the pressure piston stop structure can be in pressure contact with the respective cylinder base.
- the blind hole-like depression is therefore, in the state completely emptied of hydraulic fluid or in the completely filled state with hydraulic fluid, decoupled in a fluid-tight manner from the filling chamber located radially outside the sleeve-shaped extension.
- FIG. 1 shows a gas piston accumulator in a sectional illustration
- a gas piston accumulator is shown, which is designed as a piston-cylinder unit.
- the gas piston accumulator is double-walled in FIG. 1 with an inner tube 1 and an outer tube 3.
- a pressure piston 5 is axially guided in the inner tube 1.
- the pressure piston 5 divides the inside of the inner tube 1 into a lower Flydraulik space 7 and an upper gas space 9.
- the inner tube 1 is spaced apart from the outer tube 3 at a radial distance to form an annular gap 13.
- the gas space 9 located in the inner tube 1 is delimited upward in the axial direction by a cylinder base 15 on the gas side.
- the hydraulic space 7 located in the inner tube 1 is delimited downward in the axial direction by a cylinder base 17 on the hydraulic side, in which an opening (oil inlet) 19 of a hydraulic line 21 is formed.
- the two cylinder bottoms 15, 17 together with the outer tube 3 form an outer cylindrical gas piston storage housing 23.
- a hydraulic-side tube end 25 of the inner tube 1 is conically expanded in the direction of the hydraulic-side Zylin derêt 17, whereby the annular gap 13 is bridged radially outwards.
- the conically widened pipe end 25 on the hydraulic side is welded to the 17 area between the outer tube 3 and the hydraulic side cylinder base in a pressure-resistant and liquid-tight welded connection at the inner corner.
- a gas-side, upper pipe end 27 is widened conically in the direction of the gas-side cylinder bottom 15, whereby the ring gap 13 is bridged radially outward.
- the conically widened gas-side pipe end 27 is fastened in FIG. 1 or 3 to the inner corner area between the outer pipe 3 and the gas-side cylinder base 15. In this way, there is overall a dimensionally stable double-wall structure in which the im Compared to a single wall structure, a lower amount of material is required.
- the inner circumference of the inner tube 1, which acts as a pressure piston running surface, is designed to be completely smooth cylindrical between the two tube ends 25, 27.
- the gas piston accumulator is shown in a completely oil-empty state after a discharge process.
- the pressure piston 5 is pressed against the cylinder base 17 on the hydraulic side by a pretensioning force Fv which is generated by a gas pressure p gas in the gas space 9.
- Fv pretensioning force
- the pressure piston 5 In order to support a detachment of the pressure piston 5 from the hydraulic cylinder base 17 at the start of the charging process, the pressure piston 5 has a small-area stop structure 29 which protrudes from an axially recessed piston body 31 via an axial offset Aa (FIG. 1). In the completely emptied state according to FIG. 3, the pressure piston 5 is therefore supported on the cylinder base 17 on the hydraulic side via its small-area stop structure 29.
- a hydraulic filling chamber 33 is defined between the piston base body 31, the stop structure 29, the inner tube inner circumference and the hydraulic cylinder base 17 in the oil-empty state.
- hydraulic fluid At the start of the charging process, hydraulic fluid therefore first flows from the hydraulic line 21 into the filling chamber 33 in order to support the detachment of the pressure piston 5 from the cylinder base 17 on the hydraulic side.
- the gas piston accumulator is completely filled with hydraulic fluid after a charging process has taken place.
- the pressure piston 5 is pressed against the pretensioning force Fv in the pressure system against the gas-side cylinder base 15.
- the pressure piston 5 On its gas side, the pressure piston 5 likewise has a stop structure 29 (FIG. 1) which protrudes from the piston base body 31 by an axial offset Aa.
- Fig. 2 defines the Stop structure 29 together with the inner tube inner circumference, the piston base body 31 and the gas-side cylinder base 15 form a gas-side filling chamber 35.
- the gas expands and flows from the annular gap 13 via the flow passage 10 into the inner tube 1 and further into the gas-side filling chamber 35 in order to support a detachment of the pressure piston 5 from the gas-side cylinder base 15.
- the pressure piston 5 therefore has on both sides, that is, both on its hydraulic side and on its gas side, a surface-reduced stop structure 29 which can be brought into abutment with the associated cylinder base 15, 17.
- the pressure piston 5 has a circumferential piston ring seal 37 on its piston outer circumference in order to ensure easy axial adjustment of the pressure piston 5 along the pressure piston running surface in the inner tube 1.
- the stop structure 29 on the gas side (that is, Untersei te) of the pressure piston 5 is shown. Accordingly, the stop structure 29 has a sleeve-shaped extension 39 which protrudes from the pressure piston base body 31 and is positioned concentrically to the pressure piston circumference.
- the hydraulic-side filling chamber 33 extends continuously around the sleeve-shaped extension 39 of the pressure piston 5.
- radial webs 41 protrude in a star shape and evenly distributed around the circumference, the radially outer web sides of which by a radial offset Ar ( Figure 5) within the pressure piston circumference are arranged.
- the pressure piston 5 is shown on its gas side (that is to say the upper side). Accordingly, the gas-side stop structure 29 is constructed essentially identically to the hydraulic-side stop structure 29 (FIG. 5).
- the sleeve-shaped extension 39 formed both on the gas side and on the hydraulic side of the pressure piston 5 delimits a blind hole-like depression 40 radially on the inside in FIGS. 2 or 3.
- Figure 2 the free annular end face of the respective sleeve-shaped extension 39 of the pressure piston stop structure 29 in pressure contact with the respective cylinder base 15, 17.
- the blind hole-like recess 40 is completely emptied of hydraulic fluid In the state or when completely filled with hydraulic fluid, completely fluid-tightly decoupled from the filling chamber 33, 35 located radially outside the sleeve-shaped extension 39.
- Process steps for filling the gas piston reservoir with gas are illustrated with reference to FIGS. Accordingly, a filling opening 43 is made in the outer tube 3 in a tapping step I. This is followed by an evacuation step II, in which the interior of the gas piston reservoir is evacuated from air. After completion of evacuation step II, a filling step III (FIG.
- Oil inlet 21 Hydraulic line 23 Gas piston accumulator housing 25 Hydraulic-side pipe end 27 Gas-side pipe end
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019124968.6A DE102019124968B3 (de) | 2019-09-17 | 2019-09-17 | Gaskolbenspeicher |
PCT/EP2020/066741 WO2021052639A1 (de) | 2019-09-17 | 2020-06-17 | Gaskolbenspeicher |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4031781A1 true EP4031781A1 (de) | 2022-07-27 |
Family
ID=71143702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20734664.4A Withdrawn EP4031781A1 (de) | 2019-09-17 | 2020-06-17 | Gaskolbenspeicher |
Country Status (5)
Country | Link |
---|---|
US (1) | US20220325726A1 (de) |
EP (1) | EP4031781A1 (de) |
CN (1) | CN114423954A (de) |
DE (1) | DE102019124968B3 (de) |
WO (1) | WO2021052639A1 (de) |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7802713U1 (de) * | 1978-05-18 | Bolenz & Schaefer Maschinenfabrik Kg, 3561 Eckelshausen | Zylindrischer Druckspeicher für Hydraulikanlagen | |
US2715419A (en) * | 1952-07-11 | 1955-08-16 | Superior Pipe Specialties Co | Accumulator |
US2742929A (en) * | 1953-03-27 | 1956-04-24 | Gen Motors Corp | Pressure storage device |
GB1183477A (en) * | 1967-09-15 | 1970-03-04 | Hydrotrole Ltd | Hydropneumatic Accumulator |
EP0704331A1 (de) * | 1994-09-28 | 1996-04-03 | Bing-Jye Cherng | Motorgetriebener Tankverschluss |
DE19709779A1 (de) * | 1997-03-10 | 1998-09-17 | Itt Mfg Enterprises Inc | Druckmittelspeicher |
US6612339B1 (en) * | 2001-12-28 | 2003-09-02 | Kelsey-Hayes Company | Piston with fluid sealing ridges |
DE10253012A1 (de) * | 2002-04-26 | 2003-11-06 | Continental Teves Ag & Co Ohg | Druckmittelspeicher |
WO2008157327A1 (en) * | 2007-06-14 | 2008-12-24 | Hybra-Drive Systems, Llc | Compact hydraulic accumulator |
ATE550569T1 (de) * | 2009-08-19 | 2012-04-15 | Hemscheidt Fahrwerktech Gmbh | Hydropneumatischer kolbenspeicher |
EP2470796B1 (de) * | 2009-08-26 | 2017-03-22 | Parker Hannifin Manufacturing France - Etablissement de Colombes | Verbundkolbenspeicher |
DE102009050833A1 (de) * | 2009-10-19 | 2011-04-21 | Hydac Technology Gmbh | Vorrichtung zum impulsartigen Freigeben einer in einem Speichergehäuse bevorratbaren Fluidmenge |
DE102010001200A1 (de) * | 2010-01-26 | 2011-07-28 | Robert Bosch GmbH, 70469 | Kobenspeicher |
DE102012021841A1 (de) * | 2012-10-26 | 2014-04-30 | Hydac Technology Gmbh | Trennvorrichtung für Fluidmedien |
US9211872B2 (en) * | 2012-11-14 | 2015-12-15 | Gm Global Technology Operations, Llc | Composite accumulator having metal insert |
DE102014000380A1 (de) * | 2014-01-14 | 2015-07-16 | Hydac Technology Gmbh | Speichereinrichtung |
FR3020417A1 (fr) * | 2014-04-23 | 2015-10-30 | Inergy Automotive Systems Res | Accumulateur de pression |
DE102015223529A1 (de) * | 2015-11-27 | 2017-06-01 | Robert Bosch Gmbh | Leichtbau-Kolbenspeicher für Fahrzeuge |
DE102017213915A1 (de) * | 2017-08-10 | 2019-02-14 | Robert Bosch Gmbh | Druckmittelspeicher, insbesondere zum Speichern von Bremsfluid in einem Bremskreis einer elektronisch schlupfregelbaren Fahrzeugbremsanlage |
-
2019
- 2019-09-17 DE DE102019124968.6A patent/DE102019124968B3/de not_active Expired - Fee Related
-
2020
- 2020-06-17 US US17/640,878 patent/US20220325726A1/en not_active Abandoned
- 2020-06-17 CN CN202080065040.8A patent/CN114423954A/zh active Pending
- 2020-06-17 EP EP20734664.4A patent/EP4031781A1/de not_active Withdrawn
- 2020-06-17 WO PCT/EP2020/066741 patent/WO2021052639A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
WO2021052639A1 (de) | 2021-03-25 |
CN114423954A (zh) | 2022-04-29 |
DE102019124968B3 (de) | 2021-01-21 |
US20220325726A1 (en) | 2022-10-13 |
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