WO1997004258A1 - Stufenventil - Google Patents
Stufenventil Download PDFInfo
- Publication number
- WO1997004258A1 WO1997004258A1 PCT/EP1996/002855 EP9602855W WO9704258A1 WO 1997004258 A1 WO1997004258 A1 WO 1997004258A1 EP 9602855 W EP9602855 W EP 9602855W WO 9704258 A1 WO9704258 A1 WO 9704258A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- closing body
- arrangement according
- valve arrangement
- assigned
- Prior art date
Links
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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
- F16K15/026—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
- F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0406—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of balls
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
- F16K17/19—Equalising valves predominantly for tanks
- F16K17/196—Equalising valves predominantly for tanks spring-loaded
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7771—Bi-directional flow valves
- Y10T137/7779—Axes of ports parallel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7854—In couplings for coaxial conduits, e.g., drill pipe check valves
- Y10T137/7857—Valve seat clamped between coupling elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7904—Reciprocating valves
- Y10T137/7922—Spring biased
- Y10T137/7927—Ball valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7904—Reciprocating valves
- Y10T137/7922—Spring biased
- Y10T137/7929—Spring coaxial with valve
Definitions
- the invention relates to a valve arrangement of a hydraulic system, designed as a stepped valve, comprising a housing which is provided with two pressure connections and has at least one valve seat to which a closing body is assigned, which in a closed position has a first valve area which is smaller than a second valve surface which is set when the closing body is in a position displaced from the valve seat.
- valves also known as check valves or pressure relief valves
- Known valves of this type have a closing body which is acted upon by spring force and which, in the locked position of the one-way valve, lies sealingly against its sealing seat.
- the structure of the valve means that the opening pressure depends largely on the preload force of the spring and the valve surface acted upon by the pressure fluid. As a result, the flow resistance increases as the volume flow increases. This property is disadvantageous for a large number of applications.
- a generic valve arrangement in which a closing body rests sealingly on a valve seat on the housing side in the closed position.
- the pressure fluid flowing to the closing body via an inlet in the housing acts on a valve surface which is smaller than one second valve surface that arises after the pressure fluid moves the closing body from the valve seat.
- the second valve surface corresponds to the diameter of the spherical closing body, with no flow cross-section through the one-way valve being established immediately after the closing body has been lifted from the valve seat, since the closing body is initially guided in a stepped section of a stepped bore whose diameter is only slightly larger than the diameter of the closing body.
- the known one-way valve enables the closing body to move in an uncontrolled manner in the open position, as a result of which it can strike the housing, which leads to disadvantageous noise development.
- the object of the present invention is to minimize the flow resistance for a valve arrangement which is acted upon by the pressure fluid in two flow directions, the structure of which enables effective noise suppression.
- the solution to the problem consists in arranging in a valve element two spaced-apart stage valves, each associated with a flow direction, which are provided with a valve seat and a closing body acted upon by spring force.
- the valve element according to the invention used in a valve arrangement which is connected, for example, to a hydraulic circuit having changing flow directions, has an advantageous degressive opening characteristic of the closing body. This is achieved because after opening the closing body Flow resistance due to a larger acted area on the closing body decreases compared to a closed closing body.
- a relatively soft spring which shifts the closing body in the direction of the valve seat, also brings about a desired reduction in the flow resistance from the valve element.
- the change in the hydraulically effective area or the pressure loss at the stepped valve can be set as a function of the volume flow.
- the pedal feel on the clutch pedal can be improved by using the stepped valve in a hydraulic clutch actuation of vehicles.
- the valve arrangement comprises two valve seats arranged radially spaced apart in a valve disc, each belonging to a flow direction, each of which is assigned a closing body.
- This compact step valve arrangement assigned to both flow directions enables a degressive opening behavior for both flow directions. Because of the construction space-optimized design, a stepped valve constructed in this way can be combined with other components of a hydraulic system, for example.
- closing body in the form of a ball is particularly suitable for this.
- closing bodies designed as thrust washers can also be used, which have a valve seat that is graduated in diameter and is adapted to the diameter gradation.
- a rotationally symmetrical closing body in a cylindrical design can be used, which is conical on both ends, forming a truncated cone. To reduce the mass, it is advisable to design the cylindrically shaped closing body as a hollow body.
- the larger valve area corresponds to 1, 2 to 5 times the value of the valve area which is acted upon by the pressure medium when the step valve is closed.
- the valve disk has guide elements for guiding the closing body, by means of which the closing body receives radial guidance even in the open state.
- the radial guide for the closing body can be designed in a variety of forms.
- webs or pins connected in one piece to the valve disk or a housing of the stepped valve are preferably suitable for this purpose, and are arranged circumferentially distributed.
- bushes, sleeves of the guide rods arranged in the valve disk or components surrounding the valve disk can also be used as guide elements.
- Alternative guide elements with suitable cross-sectional profiles are also suitable.
- the invention provides that the guide elements ensure a guide play that is ⁇ 0.1 mm is, whereby an exact closing body guidance can be achieved in conjunction with effective noise suppression.
- the inventive concept further provides that the closing body in the locked position, ie. H. sealing in the closed state, reaching a high degree of sealing against the sealing washer.
- the sealing seat or the valve seat for the closing body is produced from a plastic, in particular a polymer material, so that even a closing body striking the sealing seat at a high closing speed does not cause any disadvantageous noise excitation .
- a valve disk made of plastic can also be used.
- the guide elements can be provided with a coating on the side facing the closing body, for example with a PTFE coating, which also avoids a steel-on-steel system which can have a disadvantageous effect on the noise level.
- a defined leak gap is assigned to the closing body.
- This leakage gap which is advantageously introduced in a guide element, extends over the entire adjustment path of the closing body.
- the characteristic curve of the flow resistance can be influenced by the dimensioning and / or the geometric design of the leakage gap, which can be designed depending on the temperature, the viscosity or other influencing variables of the pressure fluid.
- the invention provides at least one discharge cross-section assigned to the closing body, via which a pressure medium flow through the step valve can take place after an axial displacement of the closing body.
- a control cross-section it makes sense, for example, to make spaced recesses in the wall of the guide elements, the control cross-section being able to be designed as a bore or as a longitudinal slot.
- the shape of the discharge cross-section can also be variable.
- An advantageous embodiment for influencing the flow resistance characteristic in the area of the largest volume passage is provided according to the invention in an axially stepped arrangement of the control cross sections.
- the invention provides guide elements arranged asymmetrically and control cross sections.
- the guide elements In order to achieve a targeted contact of the closing body with one or more guide elements in the open state, the guide elements have cross-sectional areas that differ from one another. This advantageously results in a directional flow which deliberately shifts the closing body in one direction.
- a further embodiment of the invention provides that the closing bodies each assigned to a flow direction have opening pressures which differ from one another. If necessary, a different opening characteristic can thus be achieved between the two flow directions.
- the compression springs assigned to the closing body can have different spring characteristics, for example.
- the valve surfaces acted upon to open the closing body are dimensioned differently.
- the invention further includes, as an alternative to using a spring, magnetic means for achieving a degressive opening characteristic of the closing body. Permanent magnets are particularly suitable for this purpose, which bring about a non-positive displacement of a closing body made of metal in the direction of the sealing seat.
- the arrangement according to the invention provides for the force of the magnetic means to be inversely proportional to the distance between the closing body and the magnetic means.
- the use of magnetic means can advantageously improve the requirement to implement a step valve which is optimized in terms of installation space, since these require a smaller installation space in comparison to a compression spring.
- the valve arrangement according to the invention is suitable for installation in a hydraulic system for a hydraulically actuated friction clutch of vehicles, which is often acted upon by longitudinal vibrations of the internal combustion engine, which are triggered by combustion shocks and cause a bending deformation of the crank pin and crank arm of the crankshaft, which are caused by the friction clutch transferred to the hydraulic system and lead to a disadvantageous tingling of the clutch pedal which impairs driving comfort.
- valve element according to the invention hydraulically operated switchable valve drive elements are suitable for the actuation of gas exchange valves in internal combustion engines.
- the opening characteristic that can be achieved by the valve according to the invention is particularly suitable for use in pressure medium lines for switching tappets and hydraulic valve lash compensation elements.
- Another area of application for the valve element according to the invention are hydraulic tensioning devices for traction mechanism drives and hydraulic power steering systems.
- Figure 1 in a sectional drawing the basic structure of a step valve according to the invention
- FIG. 2 shows a valve element in a longitudinal section, which comprises two radially spaced step valves
- FIG. 3 shows the front view of the valve element according to FIG. 2;
- FIG. 4 shows the valve element according to FIG. 2, inserted between two housings to form a damping element
- FIG. 5 shows a damping element designed as an alternative to FIG. 4 with cylindrical closing bodies
- a valve element 1 is shown in longitudinal section, which represents a one-way valve, designed as a step valve 5 and a housing 2, which has unidirectional guide elements 3 which are integrally connected to the housing 2 and which radially around one Closing body 4 are arranged.
- the closing body 4 is pressurized by a compression spring 10, which is mutually supported on a housing 7, forming a valve seat 6 on the housing 2.
- the guide elements 3 form a closing body guide while maintaining a tight guide play.
- the pressure medium pressure acting on the closing body 4 via the valve surface "d" shifts the closing body in the direction of the arrow.
- a pressure medium flow which flows against the valve element 1 via the valve surface "d" (see arrow), acts on the closing body 4 shown in FIG. 1.
- the closing body 4 can be axially displaced in the direction of the arrow if a product of the valve surface "d” and the pressure of the pressure medium resulting force is greater than the force of the compression spring 10.
- a subset of the pressure medium is passed through a leakage gap 8 arranged in the guide element 3 screened.
- An increased pressure medium flow through the step valve 5 can take place as soon as the equator of the closing body 4 has reached the position "A".
- the largest passage cross section results when the closing body 4 has passed the position "B” and the pressure medium can flow out via the control cross section 9b.
- FIG. 2 and FIG. 3 of a valve element 11 according to the invention, the components that correspond to the first exemplary embodiment are provided with numerals that are higher by 10, so that, with regard to their description, the design for the first exemplary embodiment (FIG. 1) can be referred.
- the valve element 11 shown in FIG. 2 comprises two radially spaced step valves 15a, 15b, which are arranged in a valve disk 12, the function of the valve disk 12 corresponding to that of the housing 2 according to the exemplary embodiment in FIG. 1.
- the stepped valves 15a, 15b, which are arranged in alignment, are each assigned to a flow direction.
- the respective arrows indicate the direction in which the closing bodies 14 can be displaced by the hydraulic fluid in order to achieve a pressure medium flow.
- the valve disk 12 has inlets rounded on the inflow side of the valve surface "d" and control cross sections 19, which are each designed to be radially spread outwards starting from the position "A" or "B".
- the valve element 1 accordinging to FIG.
- FIG. 4 shows a damping element 21, which can be used as a "prickle filter” for the hydraulic actuation of a friction clutch of vehicles, and which comprises two housings 1 7a, 1 7b, and which have a connection 22 and 23, respectively, between the housings 1 7a, 1 7b to which the valve element 11 according to FIG. 2 is used.
- the housings 1 7a, 1 7b are surrounded by a bushing in the center area, which is provided with a flange around each ring flange radially inwards on both end faces.
- FIG. 5 shows a damping element 41 constructed in comparison to FIG. 4, which provides closing bodies 24 in a cylindrical design, which are inserted radially spaced into the valve disk 32.
- the closing bodies 24 On both end faces, the closing bodies 24 have truncated cone-like transitions which, on the one hand, bear against the valve seat 26 in the closed state of the valve element 31 and on which a compression spring 30 is mutually centered.
- the structure of the valve element 31 provides a valve disk 32 made of plastic, in which the control cross sections 29a, 29b are introduced and each leak body 24 is assigned a leakage gap 28a, 28b.
- Elastic retaining fingers which are connected in one piece to the valve disk 32 and serve as axially emerging from the valve disk 32, serve as guide elements 33.
- the damping element 41 further comprises housings 27a, 27b assigned to the valve disk 32 on both sides, which are surrounded by a sleeve 34 to create a unit, which are positively connected to the housings 27a, 27b on the end faces.
- FIG. 6 illustrates in a diagram the course of the flow resistance of the step valve 5 or 15a, 15b according to the invention in comparison to a conventionally designed ball valve in a one-way valve construction.
- the flow pressure resistance " ⁇ P” is plotted on the ordinate and the volume flow “V” on the abscissa.
- the curve profile "a" assigned to the stepped valve 5 or 15a, 15b shows a strongly degressive profile, ie the pressure required to open the closing bodies 4, 14 is significantly higher than the pressure which arises in the open state with a relatively low flow volume. A pressure increase takes place depending on the flow volume.
- the curve "b” shows the flow pressure resistance for a conventionally designed one-way valve with a closing body in the shape of a ball, in which the flow resistance increases from the start of opening of the one-way valve.
- valve element 19 control cross section
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/973,027 US5960822A (en) | 1995-07-17 | 1996-06-29 | Step valve |
BR9609541A BR9609541A (pt) | 1995-07-17 | 1996-06-29 | Valvula escalonada |
DE19680572A DE19680572C1 (de) | 1995-07-17 | 1996-06-29 | Stufenventil |
JP9506221A JPH11509298A (ja) | 1995-07-17 | 1996-06-29 | 段付き弁 |
DE19680572D DE19680572D2 (de) | 1995-07-17 | 1996-06-29 | Stufenventil |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19525948A DE19525948A1 (de) | 1995-07-17 | 1995-07-17 | Stufenventil |
DE19525948.3 | 1995-07-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997004258A1 true WO1997004258A1 (de) | 1997-02-06 |
Family
ID=7767003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1996/002855 WO1997004258A1 (de) | 1995-07-17 | 1996-06-29 | Stufenventil |
Country Status (6)
Country | Link |
---|---|
US (1) | US5960822A (de) |
JP (1) | JPH11509298A (de) |
KR (1) | KR100406086B1 (de) |
BR (1) | BR9609541A (de) |
DE (2) | DE19525948A1 (de) |
WO (1) | WO1997004258A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5940834A (en) * | 1997-03-13 | 1999-08-17 | Mitel Corporation | Automatic web page generator |
US10016541B2 (en) | 2010-01-20 | 2018-07-10 | Kci Licensing, Inc. | Leak-resistant bandage systems and methods with hydrophilic foam wound insert for fluid-instillation and/or negative-pressure wound therapies |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2386934B (en) * | 1999-02-27 | 2003-12-03 | Luk Lamellen & Kupplungsbau | Damping device in a hydraulic operating system of a shift and separate clutch |
DE10059382A1 (de) * | 1999-12-10 | 2001-06-13 | Luk Lamellen & Kupplungsbau | Hydraulisches System |
FR2812733A1 (fr) * | 2000-08-02 | 2002-02-08 | Edouard Juszkiewicz | Dispositif autonome de regulation de pression de fluide dans une enceinte |
JP3534691B2 (ja) * | 2000-10-20 | 2004-06-07 | カヤバ工業株式会社 | リリーフ弁 |
DE10224430A1 (de) * | 2002-06-01 | 2003-12-11 | Bosch Gmbh Robert | Rückschlagventil |
DE102004048593A1 (de) * | 2004-08-13 | 2006-02-23 | Robert Bosch Gmbh | Rückschlagventil |
US20060102534A1 (en) * | 2004-11-15 | 2006-05-18 | Faria Manuel S | Bypass filter assembly |
JP2006207693A (ja) * | 2005-01-28 | 2006-08-10 | Aisin Seiki Co Ltd | 圧力作動弁 |
DE102005010711A1 (de) | 2005-03-09 | 2006-09-14 | Schaeffler Kg | Hydraulisches Ventilspielausgleichselement |
JP5149624B2 (ja) * | 2005-10-03 | 2013-02-20 | 株式会社ミツバ | 圧力制御装置 |
DE102006036691B4 (de) * | 2006-08-05 | 2014-07-03 | Zf Friedrichshafen Ag | Rückschlagventil |
JP2010071294A (ja) * | 2007-01-11 | 2010-04-02 | Mitsuba Corp | 圧力制御装置 |
DE102008001554B4 (de) * | 2008-05-05 | 2014-02-27 | Robert Bosch Gmbh | Ventil, insbesondere zur Begrenzung oder Regelung von Drücken in einem Bremssystem oder in einer Brennkraftmaschine |
US8893744B2 (en) * | 2008-05-13 | 2014-11-25 | Honda Motor Co., Ltd | Two valve breather system for rear differential |
US8196723B1 (en) | 2008-11-14 | 2012-06-12 | Robust Systems Solutions, LLC | Pneumatic damper |
GB2469622B (en) * | 2009-04-20 | 2011-03-16 | Rolls Royce Plc | A fuel distributor valve |
AT508187B1 (de) * | 2009-05-05 | 2011-01-15 | Linz Ct Of Mechatronics Gmbh | Hydraulikventil |
DE102009036775A1 (de) * | 2009-08-08 | 2011-02-10 | Schaeffler Technologies Gmbh & Co. Kg | Steuertrieb einer Brennkraftmaschine |
DE102010020524A1 (de) * | 2010-05-14 | 2011-11-17 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Restdruckhalteventil und Federbein |
US20120091383A1 (en) * | 2010-10-14 | 2012-04-19 | Heedles Edward V | Marine Moisture Blocking Valve |
JP5656729B2 (ja) * | 2011-04-21 | 2015-01-21 | カヤバ工業株式会社 | 車両用キャリパブレーキ装置 |
DE102012004845B4 (de) * | 2012-03-13 | 2023-10-12 | Wmf Gmbh | Milchaufschäumer |
CN103062463A (zh) * | 2013-01-16 | 2013-04-24 | 成都杰森输配设备实业有限公司 | 基于四氢噻吩储液罐的呼吸阀及其安装方法 |
DE102014225953A1 (de) * | 2014-12-16 | 2016-06-16 | Robert Bosch Gmbh | Ventilbaugruppe für einen Druckänderungsdämpfer für eine bremskraftgeregelte, hydraulische Fahrzeugbremsanlage, Hydraulikblock für eine solche Fahrzeugbremsanlage und Fahrzeugbremsanlage mit einem solchen Hydraulikblock |
CN105909622B (zh) * | 2016-06-30 | 2017-09-26 | 江苏金荣森制冷科技有限公司 | 带球型泄压阀的液压旁路的液压换热系统 |
DE102017122527A1 (de) * | 2017-09-28 | 2019-03-28 | Schaeffler Technologies AG & Co. KG | Kribbelfilter |
US10948068B2 (en) * | 2018-03-01 | 2021-03-16 | GM Global Technology Operations LLC | Transmission pressure controlled vent system |
CN111731378A (zh) * | 2020-06-16 | 2020-10-02 | 东风商用车有限公司 | 一种具有行程卸荷阀的转向助力缸总成 |
US11920720B2 (en) * | 2021-05-14 | 2024-03-05 | Saudi Arabian Oil Company | System and method for mitigating water hammer by looping surge pressure |
ES1280630Y (es) * | 2021-08-26 | 2022-01-28 | Cebi Electromechanical Components Spain S A | Valvula bidireccional |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2351874A (en) * | 1942-05-20 | 1944-06-20 | Parker Appliance Co | Relief valve for fuel tanks |
GB878019A (en) * | 1959-02-12 | 1961-09-20 | Westinghouse Brake & Signal | Improvements in and relating to the manufacture of valves |
DE2728486A1 (de) * | 1977-06-24 | 1979-01-04 | Zahnradfabrik Friedrichshafen | Rueckschlagventil |
GB2032581A (en) * | 1978-10-24 | 1980-05-08 | Mac Valves Inc | Combined pressure reducer and flow control valve |
DE4428074A1 (de) * | 1994-04-15 | 1995-10-19 | Schaeffler Waelzlager Kg | Vordruckventil einer hydraulischen Kupplungsbetätigungseinrichtung |
Family Cites Families (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7213157U (de) * | 1972-07-06 | Bopp & Reuther Gmbh | Rückflußverhinderer mit waagerechtem Durchgang für in Rohrleitungen eingebaute Wasserzähler | |
DE7239880U (de) * | 1974-07-11 | Kellermann R Kg | Ausgleichselement für das Ventilspiel an Kolbenmaschinen | |
DE97283C (de) * | ||||
US1351906A (en) * | 1916-09-29 | 1920-09-07 | Charles M Heeter | Valve for deep wells |
DE702425C (de) * | 1934-11-01 | 1941-02-07 | Deckel Friedrich | Rueckholventil, insbesondere fuer Einspritzpumpen von Brennkraftmaschinen |
FR1038587A (fr) * | 1950-03-02 | 1953-09-30 | Fu R Lindes Eismaschinen Ag Ge | Procédé pour empêcher la souillure de gaz de valeur dans des bouteilles d'acier |
DE835969C (de) * | 1950-03-03 | 1952-04-07 | Linde Eismasch Ag | Verfahren zur Verhuetung der Verunreinigung wertvoller Gase in Stahlflaschen und Ventil zur Durchfuehrung des Verfahrens |
US2643090A (en) * | 1950-09-09 | 1953-06-23 | Harjeroy Engineered Petroleum | Shock absorbing check valve for hydraulic systems |
US2723679A (en) * | 1954-11-05 | 1955-11-15 | Howard B Harris | Self-cleaning vertical air check valve |
FR1115781A (fr) * | 1954-12-06 | 1956-04-30 | Applic Mach Motrices | Soupape à contre-pression |
US3017897A (en) * | 1956-08-29 | 1962-01-23 | Sertec Soc D Etudes Et De Rech | Valve means for controlling the pressure of a fluid system |
US3016913A (en) * | 1957-02-25 | 1962-01-16 | Bargmann Richard | Explosion safety valves, especially for marine engines |
FR1207358A (fr) * | 1958-06-09 | 1960-02-16 | Caterpillar Tractor Co | Distributeur, en particulier pour vérin hydraulique |
DE1160693B (de) * | 1960-09-06 | 1964-01-02 | Eaton Mfg Co | Vorrichtung zur Zumessung der Schmiermittelmenge fuer die Ventilsteuerung an Brennkraftmaschinen |
FR1382117A (fr) * | 1963-07-23 | 1964-12-18 | Perfectionnements aux boîtes à soupapes | |
JPS468069Y1 (de) * | 1968-11-27 | 1971-03-22 | ||
DE2028383A1 (de) * | 1970-06-09 | 1972-03-16 | Bau Kg Fabrik Fuer Kraftfahrze | Verschlußdeckel mit automatischem Druckausgleich über Ventilteile gesteuert |
JPS4836552A (de) * | 1971-09-13 | 1973-05-30 | Humes Ltd | |
DE2341663A1 (de) * | 1973-08-17 | 1975-02-27 | Weinig Michael Kg | Rotierendes werkzeug fuer holzbearbeitungsmaschinen, insbesondere spanwerkzeug wie messerkopf oder fraeser, mit einer zentralen aufnahmebohrung fuer eine antriebswelle der bearbeitungsmaschine |
US3901475A (en) * | 1974-02-28 | 1975-08-26 | Emerson Electric Co | Plastic ball seat member with constant bleed means |
GB1524255A (en) * | 1975-09-04 | 1978-09-06 | Jwi Ltd | Automatic vacuum stabilizing valve |
DE2941244C2 (de) * | 1979-10-11 | 1984-09-27 | Lechler Gmbh & Co Kg, 7012 Fellbach | Ventilanordnung |
US4337873A (en) * | 1980-11-17 | 1982-07-06 | General Motors Corporation | Fuel cap with poppet type valves |
FR2606454B1 (fr) * | 1986-11-06 | 1990-04-20 | Peugeot | Clapet antiretour pour circuit de liquide sous pression dans un moteur a combustion interne, et moteur equipe de ce clapet |
DE3720281A1 (de) * | 1987-06-19 | 1989-01-05 | Gelenkwellenbau Gmbh | Loesbare spannvorrichtung |
DE3840182A1 (de) * | 1988-11-29 | 1990-05-31 | Wagner Gmbh & Co Fahrzeugteile | Einwegeventil |
US5054511A (en) * | 1990-09-11 | 1991-10-08 | Tuan C T | Tire valve having an automatic pressure release device |
-
1995
- 1995-07-17 DE DE19525948A patent/DE19525948A1/de not_active Withdrawn
-
1996
- 1996-06-29 JP JP9506221A patent/JPH11509298A/ja active Pending
- 1996-06-29 WO PCT/EP1996/002855 patent/WO1997004258A1/de active IP Right Grant
- 1996-06-29 US US08/973,027 patent/US5960822A/en not_active Expired - Fee Related
- 1996-06-29 KR KR1019970709994A patent/KR100406086B1/ko not_active IP Right Cessation
- 1996-06-29 DE DE19680572A patent/DE19680572C1/de not_active Expired - Fee Related
- 1996-06-29 BR BR9609541A patent/BR9609541A/pt not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2351874A (en) * | 1942-05-20 | 1944-06-20 | Parker Appliance Co | Relief valve for fuel tanks |
GB878019A (en) * | 1959-02-12 | 1961-09-20 | Westinghouse Brake & Signal | Improvements in and relating to the manufacture of valves |
DE2728486A1 (de) * | 1977-06-24 | 1979-01-04 | Zahnradfabrik Friedrichshafen | Rueckschlagventil |
GB2032581A (en) * | 1978-10-24 | 1980-05-08 | Mac Valves Inc | Combined pressure reducer and flow control valve |
DE4428074A1 (de) * | 1994-04-15 | 1995-10-19 | Schaeffler Waelzlager Kg | Vordruckventil einer hydraulischen Kupplungsbetätigungseinrichtung |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5940834A (en) * | 1997-03-13 | 1999-08-17 | Mitel Corporation | Automatic web page generator |
US10016541B2 (en) | 2010-01-20 | 2018-07-10 | Kci Licensing, Inc. | Leak-resistant bandage systems and methods with hydrophilic foam wound insert for fluid-instillation and/or negative-pressure wound therapies |
US10933178B2 (en) | 2010-01-20 | 2021-03-02 | Kci Licensing, Inc. | Leak-resistant bandage systems and methods with hydrophilic foam wound insert for fluid-instillation and/or negative-pressure wound therapies |
Also Published As
Publication number | Publication date |
---|---|
KR19990028671A (ko) | 1999-04-15 |
DE19680572C1 (de) | 2003-07-31 |
JPH11509298A (ja) | 1999-08-17 |
US5960822A (en) | 1999-10-05 |
KR100406086B1 (ko) | 2004-04-28 |
BR9609541A (pt) | 1999-06-08 |
DE19525948A1 (de) | 1997-01-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO1997004258A1 (de) | Stufenventil | |
DE4406918C2 (de) | Dämpfventileinrichtung | |
EP2159444B1 (de) | Verstellbares Dämpfventil | |
DE102012210459B3 (de) | Verstellbare Dämpfventileinrichtung | |
EP3212958B1 (de) | Verfahren zum betreiben eines regelbaren schwingungsdämpfers für kraftfahrzeuge | |
WO2021037798A1 (de) | Dämpfventileinrichtung mit progressiver dämpfkraftkennlinie | |
DE112016004157T5 (de) | Stoßdämpfer | |
DE102012210460B3 (de) | Verstellbare Dämpfventileinrichtung | |
DE4019221A1 (de) | Stossdaempfer mit variabler daempfungskraft | |
DE4212550C2 (de) | Ventilanordnung mit einem Wegeventil | |
EP1774176B1 (de) | Kolbenpumpe mit verbesserter druckaufbaudynamik | |
EP2546542A2 (de) | Verstellbare Dämpfventileinrichtung mit einem Notbetriebventil | |
DE102004001565A1 (de) | Elektromagnetisches Ventil, insbesondere für eine Bremsanlage eines Kraftfahrzeugs | |
EP1927783A2 (de) | Verstellbares Dämpfventil mit einer Fail-safe-Dämpfkraftkennlinie | |
EP0902194B1 (de) | Lasthalteventil | |
EP2212167A1 (de) | Hydraulische kolbenpumpe | |
WO2016071116A1 (de) | Regelbarer schwingungsdämpfer für kraftfahrzeuge | |
DE19525949A1 (de) | Einrichtung zur Dämpfung von Schwingungen in Hydrauliksystemen | |
DE19711689A1 (de) | Aggregat-Lager | |
WO2003058100A1 (de) | Einlass- bzw. auslassventil für eine pumpe | |
EP0976948B1 (de) | Dämpfungseinrichtung für bewegte Massen, vorzugsweise für elektromagnetische Antriebssysteme | |
EP0616146B1 (de) | Dämpfventileinrichtung | |
DE112020000261T5 (de) | Metalldämpfer mit Metallmembran und damit versehene Kraftstoffpumpe | |
EP1793149B1 (de) | Elektromagnetischer Aktuator | |
EP1338823A2 (de) | Hydraulischer Schwingungsdämpfer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): BR DE JP KR US |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 08973027 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1019970709994 Country of ref document: KR |
|
ENP | Entry into the national phase |
Ref document number: 1997 506221 Country of ref document: JP Kind code of ref document: A |
|
REF | Corresponds to |
Ref document number: 19680572 Country of ref document: DE Date of ref document: 19980122 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 19680572 Country of ref document: DE |
|
WWP | Wipo information: published in national office |
Ref document number: 1019970709994 Country of ref document: KR |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8607 |
|
WWG | Wipo information: grant in national office |
Ref document number: 1019970709994 Country of ref document: KR |