EP0756089A3 - Hydrauliksteuersystem - Google Patents

Hydrauliksteuersystem Download PDF

Info

Publication number
EP0756089A3
EP0756089A3 EP96117035A EP96117035A EP0756089A3 EP 0756089 A3 EP0756089 A3 EP 0756089A3 EP 96117035 A EP96117035 A EP 96117035A EP 96117035 A EP96117035 A EP 96117035A EP 0756089 A3 EP0756089 A3 EP 0756089A3
Authority
EP
European Patent Office
Prior art keywords
valve
control valve
outlet
liquid
lock
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Withdrawn
Application number
EP96117035A
Other languages
English (en)
French (fr)
Other versions
EP0756089A2 (de
Inventor
Matthew Thomas Miller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deere and Co
Original Assignee
Deere and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Deere and Co filed Critical Deere and Co
Publication of EP0756089A2 publication Critical patent/EP0756089A2/de
Publication of EP0756089A3 publication Critical patent/EP0756089A3/de
Withdrawn legal-status Critical Current

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
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/003—Systems with load-holding valves
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • 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
    • F15B13/021—Valves for interconnecting the fluid chambers of an actuator
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/3051—Cross-check valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed centre
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3144—Directional control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Magnetically Actuated Valves (AREA)
  • Float Valves (AREA)

Abstract

Ein druckgesteuertes Hauptsteuerventil (18) verteilt Flüssigkeit zwischen einem hydraulischen Stellglied (12), einer Pumpe (20) und einem Vorratsbehälter (22). Zwischen jedem Arbeitsanschluß (26, 28) des Hauptsteuerventils (18) und einem zugehörigen Stellgliedanschluß (14, 16) ist ein Aussperrventil (44, 46) angeordnet, welches die Flüssigkeitsleckage der Stellgliedanschlüsse (14, 16) vermindert. Jedes Aussperrventil (44, 46) enthält ein durch Druck beeinflußbares Sitzventilteil (56), welches dem Flüssigkeitsdruck in einer Aussperrkammer (50) ausgesetzt ist. Zwischen jedem Aussperrventil (44, 46) und einem zugehörigen Steuerventil (40, 42) ist ein Auslaßsteuerventil (60, 62) angeordnet. Jedes Auslaßsteuerventil (60, 62) enthält ein Auslaßrückschlagventil (66), welches die aus der Aussperrkammer (50) abgelassene Flüssigkeit steuert, sowie einen Auslaßventilkolben (68), der durch Federmittel (72) in eine Lage gedrückt wird, in der er das Auslaßrückschlagventil (66) in seine geschlossene Stellung drängt, so daß die Flüssigkeit nicht aus der Aussperrkammer (50) entweichen kann. Hiedurch können bei einer mittleren Schwimmstellung des Hauptsteuerventils (18) Leckagen an den Stellgliedanschlüssen (14, 16) klein gehalten werden.
EP96117035A 1993-04-05 1994-03-24 Hydrauliksteuersystem Withdrawn EP0756089A3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/043,059 US5331882A (en) 1993-04-05 1993-04-05 Control valve system with float valve
US43059 1993-04-05
EP94104714A EP0623754B1 (de) 1993-04-05 1994-03-24 Hydrauliksteuersystem

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP94104714A Division EP0623754B1 (de) 1993-04-05 1994-03-24 Hydrauliksteuersystem
EP94104714.4 Division 1994-03-24

Publications (2)

Publication Number Publication Date
EP0756089A2 EP0756089A2 (de) 1997-01-29
EP0756089A3 true EP0756089A3 (de) 1998-03-25

Family

ID=21925249

Family Applications (2)

Application Number Title Priority Date Filing Date
EP96117035A Withdrawn EP0756089A3 (de) 1993-04-05 1994-03-24 Hydrauliksteuersystem
EP94104714A Expired - Lifetime EP0623754B1 (de) 1993-04-05 1994-03-24 Hydrauliksteuersystem

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP94104714A Expired - Lifetime EP0623754B1 (de) 1993-04-05 1994-03-24 Hydrauliksteuersystem

Country Status (7)

Country Link
US (1) US5331882A (de)
EP (2) EP0756089A3 (de)
JP (1) JP3476533B2 (de)
BR (1) BR9401332A (de)
CA (1) CA2119616C (de)
DE (1) DE59403208D1 (de)
ES (1) ES2103514T3 (de)

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5577532A (en) * 1994-07-11 1996-11-26 Palmer; Thomas W. Valve actuator
JP3478931B2 (ja) * 1996-09-20 2003-12-15 新キャタピラー三菱株式会社 油圧回路
KR100474259B1 (ko) * 1996-11-26 2005-06-20 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 건설기계의작업장치용실린더를위한유압장치
AT406357B (de) * 1998-10-15 2000-04-25 Hoerbiger Hydraulik Anordnung zur hydraulischen betätigung eines verdecks, eines heckdeckels od. dgl.
US6622939B2 (en) * 1999-02-01 2003-09-23 Exactrix Global Systems Apparatus for applying liquid fertilizers and pesticides using a dual stage variable rate distribution manifold
US6186044B1 (en) 1999-03-08 2001-02-13 Caterpillar Inc. Fluid control system with float capability
DE19919015C2 (de) * 1999-04-27 2001-11-15 Sauer Danfoss Nordborg As Nord Hydraulische Ventilanordnung mit Verriegelungs- und Schwimmfunktion
US6173639B1 (en) 1999-05-07 2001-01-16 Caterpillar Inc. Fluid control system having float control
US6389952B1 (en) * 1999-05-28 2002-05-21 Caterpillar Inc. Apparatus and method of operating a fluid cylinder of a work machine
DE19931142C2 (de) * 1999-07-06 2002-07-18 Sauer Danfoss Holding As Nordb Hydraulische Ventilanordnung mit Verriegelungsfunktion
US6282893B1 (en) 1999-08-19 2001-09-04 Delaware Capital Formation, Inc. Self-contained actuator
US6516706B2 (en) 1999-08-19 2003-02-11 Delaware Capital Formation, Inc. Actuator having internal valve structure
DE19958341A1 (de) * 1999-12-03 2001-07-12 Claas Industrietechnik Gmbh Erntemaschine mit frontseitig angebautem Erntevorsatz
DE10045404C2 (de) * 2000-09-14 2002-10-24 Sauer Danfoss Holding As Nordb Hydraulische Ventilanordnung
AUPR170400A0 (en) * 2000-11-28 2000-12-21 Ifield Technology Ltd Emergency energy release for hydraulic energy storage systems
JP2004301214A (ja) * 2003-03-31 2004-10-28 Hitachi Constr Mach Co Ltd 作業用車両の油圧駆動装置
US7004090B2 (en) * 2003-09-09 2006-02-28 Exactrix Llc Fertilizer injector wing for disc openers
US20050220596A1 (en) * 2004-03-30 2005-10-06 Cnh America Llc Method and apparatus for hydraulically produced ground following of an unloading ramp for a cotton harvester
DE102004020371A1 (de) * 2004-04-23 2005-11-10 Botschafter-Knopff, Ilse Hydraulische Steuereinrichtung
US7752842B2 (en) * 2005-08-19 2010-07-13 Bucher Hydraulics Ag Circuit for controlling a double-action hydraulic drive cylinder
US20070290152A1 (en) * 2006-06-16 2007-12-20 Pengfei Ma Poppet valve
US8424836B2 (en) * 2006-06-16 2013-04-23 Caterpillar Inc. Bidirectional force feedback poppet valve
US20070290151A1 (en) * 2006-06-16 2007-12-20 Matthew Thomas Muller Valve
EP1895169A1 (de) * 2006-09-04 2008-03-05 OIL CONTROL S.p.A. Druckenlastung und Kontrollventilanordnung
US8893818B2 (en) * 2010-12-17 2014-11-25 Caterpillar Inc. Hydraulic system having dual tilt blade control
US8925439B2 (en) * 2011-01-13 2015-01-06 Husco International, Inc. Valve control valve circuit for operating a single acting hydraulic cylinder
KR101741703B1 (ko) 2013-01-24 2017-05-30 볼보 컨스트럭션 이큅먼트 에이비 건설기계의 유량 제어장치 및 제어방법
JP6159629B2 (ja) 2013-09-13 2017-07-05 Ｋｙｂ株式会社 流体圧制御装置
CN104675780A (zh) * 2013-12-02 2015-06-03 江苏神通阀门股份有限公司 一种高炉煤气发电管网系统用隔离阀
CN104482248B (zh) * 2014-11-03 2017-05-10 济南数锐电子科技有限公司 液控换向阀
US20170023149A1 (en) * 2015-07-22 2017-01-26 Cnh Industrial America Llc Hydraulic signal control system and method
DE102017117335B4 (de) * 2017-07-31 2024-12-05 Bürkert Werke GmbH & Co. KG Betätigungseinheit für ein Prozessventil sowie Prozessventil
WO2019053783A1 (ja) * 2017-09-12 2019-03-21 株式会社島津製作所 コントロールバルブ
CN108980129B (zh) * 2018-07-24 2020-04-07 中国航空工业集团公司西安飞行自动控制研究所 一种负载保持控制阀
CN112384662A (zh) * 2018-08-30 2021-02-19 沃尔沃建筑设备公司 用于建筑设备的液压回路
US11572903B2 (en) * 2019-02-06 2023-02-07 Kosmek Ltd. Pneumatic cylinder device with holding valve

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943825A (en) * 1972-04-17 1976-03-16 Caterpillar Tractor Co. Hydraulic control system for load supporting hydraulic motors
FR2459894A1 (fr) * 1979-06-26 1981-01-16 Poclain Sa Dispositif de commande d'un recepteur a fluide sous pression.
EP0066151A2 (de) * 1981-05-28 1982-12-08 Vickers Incorporated Hydrauliches Steuersystem mit vorgesteuertem Rückschlagventil
GB2113310A (en) * 1982-01-20 1983-08-03 Rexroth Mannesmann Gmbh Device for controlling a hydromotor
EP0330575A1 (de) * 1988-02-25 1989-08-30 Marrel Hydraulischer Kreislauf mit zugehörigem Sicherheitsventil für hydraulische Verbraucher
EP0331076A1 (de) * 1988-03-03 1989-09-06 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Hydraulische Schaltung für Zylinder
WO1991019108A1 (de) * 1990-05-26 1991-12-12 Robert Bosch Gmbh Steuereinrichtung für einen arbeitszylinder

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3304842A (en) * 1964-04-20 1967-02-21 Homer J Shafer Non-hammer poppet valve control
SE326666B (de) * 1968-11-29 1970-07-27 Akermans Verkstad Ab
US3643696A (en) * 1970-09-02 1972-02-22 Rex Chainbelt Inc Hydraulic control circuit
US4206688A (en) * 1978-06-09 1980-06-10 Caterpillar Tractor Co. Overrunning load control for hydraulic motors
US4201052A (en) * 1979-03-26 1980-05-06 Sperry Rand Corporation Power transmission
US4340087A (en) * 1980-08-21 1982-07-20 Sperry Corporation Power transmission
US4359931A (en) * 1981-01-19 1982-11-23 The Warner & Swasey Company Regenerative and anticavitation hydraulic system for an excavator
US4611528A (en) * 1981-11-12 1986-09-16 Vickers, Incorporated Power transmission
US4860788A (en) * 1987-06-29 1989-08-29 Kayaba Industry Co. Ltd. Metering valve
US5235809A (en) * 1991-09-09 1993-08-17 Vickers, Incorporated Hydraulic circuit for shaking a bucket on a vehicle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943825A (en) * 1972-04-17 1976-03-16 Caterpillar Tractor Co. Hydraulic control system for load supporting hydraulic motors
FR2459894A1 (fr) * 1979-06-26 1981-01-16 Poclain Sa Dispositif de commande d'un recepteur a fluide sous pression.
EP0066151A2 (de) * 1981-05-28 1982-12-08 Vickers Incorporated Hydrauliches Steuersystem mit vorgesteuertem Rückschlagventil
GB2113310A (en) * 1982-01-20 1983-08-03 Rexroth Mannesmann Gmbh Device for controlling a hydromotor
EP0330575A1 (de) * 1988-02-25 1989-08-30 Marrel Hydraulischer Kreislauf mit zugehörigem Sicherheitsventil für hydraulische Verbraucher
EP0331076A1 (de) * 1988-03-03 1989-09-06 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Hydraulische Schaltung für Zylinder
WO1991019108A1 (de) * 1990-05-26 1991-12-12 Robert Bosch Gmbh Steuereinrichtung für einen arbeitszylinder

Also Published As

Publication number Publication date
JP3476533B2 (ja) 2003-12-10
JPH074403A (ja) 1995-01-10
EP0623754A2 (de) 1994-11-09
BR9401332A (pt) 1994-10-18
US5331882A (en) 1994-07-26
EP0623754B1 (de) 1997-06-25
ES2103514T3 (es) 1997-09-16
CA2119616C (en) 1998-09-01
DE59403208D1 (de) 1997-07-31
EP0756089A2 (de) 1997-01-29
CA2119616A1 (en) 1994-10-06
EP0623754A3 (de) 1995-03-01

Similar Documents

Publication Publication Date Title
EP0756089A3 (de) Hydrauliksteuersystem
US4673162A (en) High-pressure self-actuating flow-control valve assembly
EP4433707B1 (de) Membrankolbenpumpe
EP1241346A3 (de) Ventil zum Steuern von Flüssigkeiten
DE1703187B2 (de) Ventileinrichtung zur Wiederherstellung der Saugfähigkeit einer Pumpenanlage
DE10056568C1 (de) Vorrichtung zur Einhaltung der korrekten Ölüberströmmenge an Membrankompressoren
US1981288A (en) Well pumping apparatus
DE970761C (de) Automatisch arbeitendes Pumpenaggregat, insbesondere fuer hydraulische Ausbaurahmen unter Tage
DE218715C (de)
DE753835C (de) Zweistufiger Fluessigkeitsdruckerzeuger
DE6918188U (de) Ventilsteuervorrichtung fuer brennkraftmaschinen.
DE1428009A1 (de) Vorrichtung zum Komprimieren bzw. Expandieren eines Mediums
EP1188934A3 (de) Steuerungsvorrichtung für einen hydraulischen Volumenstrom
DE491746C (de) Sicherheitsventil
DE184757C (de)
EP0053608A1 (de) Ventilsystem.
US4145164A (en) Pump for hydraulic brake actuator
DE9016844U1 (de) Hydraulik-Druckregler mit Selbstentlastung bei O-bar Ansteuerdruck
DE174783C (de)
DE3701402C2 (de) Hydraulischer Kraftverstärker
DE2641216A1 (de) Mehrstufiger hydraulischer teleskopzylinder
DE453341C (de) Selbsttaetige Absperrvorrichtung fuer den Auslass von Druckwasserkraftspeichern mit Druckluftbelastung
DE135148C (de)
AT95139B (de) Schmiervorrichtung.
DE3939146A1 (de) Vorrichtung zur reinigung von kanaelen und rohren mittels spuelfluessigkeit

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AC Divisional application: reference to earlier application

Ref document number: 623754

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE ES FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR GB IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19980926