EP0024343B1 - Pumpe zur Förderung von Dickstoffen, insbesondere von Beton - Google Patents

Pumpe zur Förderung von Dickstoffen, insbesondere von Beton Download PDF

Info

Publication number
EP0024343B1
EP0024343B1 EP80104781A EP80104781A EP0024343B1 EP 0024343 B1 EP0024343 B1 EP 0024343B1 EP 80104781 A EP80104781 A EP 80104781A EP 80104781 A EP80104781 A EP 80104781A EP 0024343 B1 EP0024343 B1 EP 0024343B1
Authority
EP
European Patent Office
Prior art keywords
housing
shaft
pump
outlet
rotating body
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.)
Expired
Application number
EP80104781A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0024343A1 (de
Inventor
Friedrich Dipl.-Ing. Schwing
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.)
Friedrich Wilhelm Schwing GmbH
Original Assignee
Friedrich Wilhelm Schwing GmbH
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 Friedrich Wilhelm Schwing GmbH filed Critical Friedrich Wilhelm Schwing GmbH
Priority to AT80104781T priority Critical patent/ATE1204T1/de
Publication of EP0024343A1 publication Critical patent/EP0024343A1/de
Application granted granted Critical
Publication of EP0024343B1 publication Critical patent/EP0024343B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0019—Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers
    • F04B7/0034—Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers and having an orbital movement, e.g. elbow-pipe type members
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/90—Slurry pumps, e.g. concrete

Definitions

  • the invention relates to a pump for conveying thick materials, in particular concrete, through the housing of a pipe switch, which has a swivel body attached to a swivel shaft, which alternately connects an outlet opening made in a housing wall with two inlet openings arranged in another housing wall, the center points of the Inlet and outlet openings are each arranged at a radial distance from the shaft axis.
  • Thick matter pumps not only serve to convey concrete, but can also mix substances with a mud-like consistency, e.g. Promote sewage sludge.
  • the invention is described below on the basis of the conveying of concrete, because it is here for various reasons, e.g. because of the deterioration of the concrete due to the loss of liquid and the wear effect of the sand contained in the concrete, this is a particularly difficult pumping medium.
  • a thick matter pump generally has two alternately conveying cylinders, each of which is assigned an inlet opening in the housing of the pipe switch, through which the partial quantity expressed by the relevant piston from the cylinder reaches the swivel body.
  • the outlet opening is preferably assigned to only one delivery line into which the pumped concrete is directed.
  • the pipe switch enables the respective suction feed cylinder to suck in the concrete from a prefilling container, which is usually attached above the housing, which is then conveyed in the following pump cycle.
  • a thick matter pump is known from DE-A-2162406, in which an approximately U-shaped tube is provided as the swivel body, the back of which is supported on a transverse yoke in the region of the lower leg.
  • This support of the swivel tube slides in the medium, which further increases the friction and wear.
  • the transverse yoke must be held with relatively long tie rods. The elastic deformations that occur due to the considerable elastic expansion of the tie rods and the bending of the yoke in turn lead to considerable orders of magnitude of the gaps that form at the inlet openings.
  • a thick matter pump is known from DE-B-1278247, in which the pipe switch is provided with a swivel body which is adapted to the curvature of the housing base and which has a round inlet opening and two outlet openings has openings whose boundary edges partially coincide. The distance of all three openings from the axis of the swivel shaft is the same.
  • an eyeglass plate is placed on the relevant inner wall of the housing. A considerable axial force then acts on this component.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, solves the problem of designing such a thick matter pump in such a way that the mechanical loads on the housing wall having the inlet openings are greatly reduced by the swivel body, without having to accept increased bending loads on the swivel shaft.
  • the advantages achieved by the invention are essentially to be seen in the fact that through the choice of the distances with respect to a point lying on the shaft axis, freedom from moments or approximate freedom from moments can be achieved. In this way, the remaining axial force can be transferred with the shaft without bending, for example via a bearing that is subjected to pressure or tension. This camp can be arranged outside the masses to be conveyed.
  • the sealing is simplified by relieving the pressure on the housing wall, which gives the possibility of arranging axially movable sealing rings at the openings of the swivel body.
  • the outline of the partially coinciding outlet openings can be kidney-shaped in the swivel body.
  • a thrust bearing arranged on the outlet side of the housing is expediently provided for axially supporting the pivot shaft. This thrust bearing is loaded with the pivot shaft in the opposite direction to the conveying direction.
  • the pivot shaft advantageously has an axial thrust bearing on the inlet side of the housing, which is designed as a clamping device for the housing.
  • the shortened design of the swivel body results in shortened components of the housing, which can be made so strong without great effort that only minimal expansion of the housing occurs in the axial direction.
  • the axial expansion of the housing is considerably reduced by the axial force which is transmitted from the swivel shaft via the axial bearing to the housing in the opposite direction. If the swivel shaft is also provided with the tensioning device described on the inlet side, the axial expansion of the housing can be almost completely suppressed due to the rigidity of the swivel shaft in relation to tensile loads.
  • the swivel body is only axially guided by the swivel shaft and is also supported on the swivel shaft in the axial direction, as a result of which the swivel shaft is not subjected to any bending loads and the control housing is not subjected to twisting thrust loads.
  • This is based, among other things, on the advantage that sealing rings placed on the swivel body, which optimally bear under the concrete pressure against the boundary surfaces of the control housing running perpendicular to the swivel shaft, can be adapted to the latter. As a result, uneven wear can be compensated as well as structural defects in the housing.
  • the design according to the invention ensures that the friction during the pivoting process and thus also the wear can be kept to a minimum because the axial force outside the concrete can be supported on a normal rotary slide bearing. Since the remaining axial expansions of the housing are very small, any tendency to jam is effectively counteracted by sand particles pressed into the gaps.
  • the pipe switch 2 has an axially short housing 3. This housing 3 is divided in the transverse direction by means of a rib which forms a transverse wall 4. On the transverse wall 4, an eyeglass plate 5 is attached, in the inlet openings 6 and 7 for the of two conveying cylinders 8 and 9 conveyed concrete are formed (Fig. 2). The ends of the two delivery cylinders 8 and 9 are held in sleeves 10 and 11, respectively, which have seals 12 on their end faces (FIG. 2) and are held in the rear housing wall 5 'except in the transverse wall 4.
  • the two delivery cylinders 8 and 9 alternately suck concrete from the prefilling container 1 via the interior 24 of the housing 3.
  • the cylinders alternately press the sucked-in concrete through the inlet openings 6 and 7 in the spectacle plate 5.
  • the inlet openings 6 and 7 are connected to the outlet opening 25 of the housing 3 provided in the wear plate 17.
  • a pivot body generally designated 26 (FIGS. 1 and 2) is used, the design of which can be seen in particular from FIGS. 3 and 4.
  • the swivel body 26 has an entry opening 28 which is surrounded by the axially movable ring 27 shown in FIG. 2 and which is surrounded by the edge designated 29 in FIG. 2. This edge gives the inlet opening 28 a circular clear cross section.
  • the center of gravity is therefore in the middle of the circular area.
  • the swivel body has at its opposite end an exit surface surrounded by an axially movable ring 30.
  • This area is delimited by the end edge 31 of the swivel body 26 and is designated 32.
  • Its outline is kidney-shaped, as can be seen in particular from FIG. 4. Accordingly, the circular outlet openings partially collapse within the kidney-shaped boundary.
  • the center of gravity lies in the middle of the kidney-shaped outlet opening 32. It has a radial distance R 2 from the geometric axis designated 35 in FIG. 1, while the inlet opening 28 has a radial distance R 1 from the geometric axis 35.
  • the swivel body 26 is formed in one piece with an arm 37 which interacts with a bearing cover 38.
  • the bearing cover 38 can be connected to the arm 37 by means of two pairs of screws 39 and 40, so that a central section of a pivot shaft 44 can be clamped between the two parts described.
  • the pivot shaft 44 is provided in the region of the pivot body 26 with a polygonal section 45. This ends at a collar 46 with an enlarged diameter, so that the swivel body 26 can be axially fixed on the shaft.
  • the collar 46 merges into a cylindrical section 47 with a reduced diameter, which is supported in a combined radial and axial bearing 48.
  • the polygonal section 45 merges into a reduced-diameter cylindrical section 49, which continues into a further reduced-diameter spindle section 50.
  • a nut 52 with a lock nut 51 can be screwed onto the spindle section.
  • the pivot shaft is supported on a multi-part disk 53, which in turn is supported on the end face of a bearing bush 54.
  • the bearing bush 54 is thus an axial thrust bearing which is loaded against the conveying direction of the concrete by the swivel body 26.
  • the value z denotes a size which depends on the construction and indicates how many times the hydrostatically acted area of the swivel body at the inlet opening is smaller than the hydrostatically acted area of the kidney-shaped exit area.
  • the swivel shaft 44 can accordingly be tensioned at both ends, so that deformations of the parts which absorb the axial bearing loads can be counteracted.
  • the keyways 62 are therefore arranged behind the nuts 63 and 64, which enable the axial bracing and belong to the bearing generally designated 66.
  • the arrangement is thus selected such that the pivot shaft 44, on which the pivot body 26 is suspended, is axially supported on at least one bearing 54 or 66, which is assigned to the wear plate 17 or the spectacle plate 5 on the front or rear Housing wall can be arranged.
  • the swivel body 26 is designed such that in the two end positions of the swivel shaft 44 it covers one of the two inlet openings 6, 7 in the housing and on the opposite housing side the outlet opening in the housing.
  • the swivel body or the arm 70 connecting it to the swivel shaft in FIG. 5 or 37 in FIG. 3 are designed such that the swivel body is initially assigned to the swivel shaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP80104781A 1979-08-16 1980-08-13 Pumpe zur Förderung von Dickstoffen, insbesondere von Beton Expired EP0024343B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80104781T ATE1204T1 (de) 1979-08-16 1980-08-13 Pumpe zur foerderung von dickstoffen, insbesondere von beton.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2933128 1979-08-16
DE2933128A DE2933128C2 (de) 1979-08-16 1979-08-16 Dickstoffpumpe, insbesondere zur Förderung von Beton

Publications (2)

Publication Number Publication Date
EP0024343A1 EP0024343A1 (de) 1981-03-04
EP0024343B1 true EP0024343B1 (de) 1982-06-16

Family

ID=6078560

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104781A Expired EP0024343B1 (de) 1979-08-16 1980-08-13 Pumpe zur Förderung von Dickstoffen, insbesondere von Beton

Country Status (18)

Country Link
US (1) US4373875A (pl)
EP (1) EP0024343B1 (pl)
JP (1) JPS5823511B2 (pl)
AR (1) AR220645A1 (pl)
AT (1) ATE1204T1 (pl)
AU (1) AU538946B2 (pl)
BR (1) BR8005186A (pl)
CA (1) CA1156089A (pl)
CS (1) CS219288B2 (pl)
DD (1) DD152607A5 (pl)
DE (1) DE2933128C2 (pl)
ES (1) ES494213A0 (pl)
HU (1) HU183198B (pl)
MX (1) MX150696A (pl)
PL (1) PL129910B1 (pl)
SU (1) SU1163803A3 (pl)
YU (1) YU41938B (pl)
ZA (1) ZA805037B (pl)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3113787C2 (de) * 1981-04-04 1985-08-22 Friedrich Wilh. Schwing Gmbh, 4690 Herne Rohrweiche für Beton- oder Dickstoffkolbenpumpen
DE3122825C2 (de) * 1981-06-09 1984-11-08 Maschinenfabrik Walter Scheele GmbH & Co KG, 4750 Unna-Massen Vorrichtung zur Förderung von breiigen Massen, insbesondere Beton
JPS57201727U (pl) * 1981-06-17 1982-12-22
DE3304985A1 (de) * 1983-02-12 1984-08-23 Rudolf Ing. Riker (grad.), 8940 Memmingen Pumpeneinheit fuer schwerfliessende stoffe, etwa beton
DE3419832A1 (de) * 1984-05-26 1985-11-28 Karl Dipl.-Ing. 7000 Stuttgart Schlecht Rohrweiche einer dickstoff, insbesondere beton foerdernden doppelkolbenpumpe
JPS6153471A (ja) * 1984-08-22 1986-03-17 Daiwa Kiko Kk コンクリ−トポンプ
JPS6145008U (ja) * 1984-08-28 1986-03-25 釜屋化学工業株式会社 コンパクト容器
JPH0355378Y2 (pl) * 1985-07-15 1991-12-10
US5302094A (en) * 1988-07-19 1994-04-12 Putzmeister-Werk Maschinenfabrik Gmbh Tube switch for a double-cylinder sludge pump
DE4209471A1 (de) * 1992-03-24 1993-09-30 Schwing Gmbh F Dickstoffpumpe für Förderzylindern, insbesondere Zweizylinderbetonpumpe
DE10155787A1 (de) * 2001-11-14 2003-05-22 Putzmeister Ag Materialaufgabebehälter für Zweizylinder-Dickstoffpumpen
DE10343802B4 (de) * 2003-09-22 2007-12-06 Schwing Gmbh Kolben-Dickstoffpumpe mit kontinuierlichem Förderstrom
DE102004009362B4 (de) * 2004-02-26 2008-01-24 Schwing Gmbh Kolben-Dickstoffpumpe
DE102004009363B4 (de) * 2004-02-26 2008-01-24 Schwing Gmbh Kolben-Dickstoffpumpe
US20060193738A1 (en) * 2005-02-26 2006-08-31 Friedrich Schwing Pump apparatus and method for continuously conveying a viscous material
DE102005008938B4 (de) * 2005-02-26 2007-01-25 Schwing, Friedrich, Dipl.-Ing. Pumpvorrichtung und Verfahren zur kontinuierlichen Förderung breiiger Massen
WO2007111689A2 (en) * 2005-11-08 2007-10-04 Good Earth Tools, Inc. Sealing rings for abrasive slurry pumps
DE102009005318B3 (de) * 2009-01-16 2010-09-30 Schwing, Friedrich, Dipl.-Ing. Verfahren zur Förderung breiiger Massen und Pumpvorrichtung zur Förderung breiiger Massen
DE102013114008A1 (de) * 2013-12-13 2015-06-18 MPS-Matter Pumpsysteme GmbH Dickstoffpumpvorrichtung, insbesondere für eine fahrbare Dickstoffpumpe
US10001114B1 (en) 2017-03-28 2018-06-19 Jessop Initiatives LLC Continuous flow pumping system
CN109098959B (zh) * 2018-07-24 2019-12-03 山东科技大学 一种混凝土湿喷机分配阀结构
US10900302B2 (en) 2018-07-27 2021-01-26 Country Landscapes & Tree Service, LLC Directional drilling systems, apparatuses, and methods
DE102019204244A1 (de) * 2019-03-27 2020-10-01 Putzmeister Engineering Gmbh Druckverfahren und Drucksystem
CN111043027A (zh) * 2020-01-03 2020-04-21 徐州徐工施维英机械有限公司 一种分配阀及泵送机械
DE102020133021A1 (de) * 2020-12-10 2022-06-15 Liebherr-Mischtechnik Gmbh Dickstofffördervorrichtung

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1453705A1 (de) * 1963-12-19 1969-09-18 Wennberg Olav Carl Gustav Kolbenpumpe fuer Beton oder andere Massen aehnlicher Konsistenz
GB1098338A (en) * 1966-04-20 1968-01-10 Eugene Lee Sherrod Reciprocating pump for semi-liquid materials
DE1278247B (de) * 1966-04-20 1968-09-19 Eugene Lee Sherrod Mehrzylinderkolbenpumpe zum Foerdern von Beton od. dgl.
DE2142722A1 (de) * 1970-09-02 1972-03-30 Societa per la Costruzione di Maccine Edili S.p.A., Arezzo (Italien) Pump- und Förderapparat für dichte Flüssigkeitsmischungen, wie Beton oder dgl
DE2104191C3 (de) * 1971-01-29 1975-10-23 Torkret Gmbh, 4300 Essen Vorrichtung zur Förderung von breiigen, abbindenden Massen
DE2162406C3 (de) * 1971-12-16 1979-03-01 Karl Dipl.-Ing. 7024 Bernhausen Schlecht Schiebervorrichtung fur eine Pumpe mit zwei im Gegentakt arbeitenden Zylindern zum Fördern von Beton o.dgl
US3982857A (en) * 1973-10-17 1976-09-28 Karl Schlecht Support means for movable connector in concrete pump arrangement
DE2362670A1 (de) * 1973-12-17 1975-06-19 Gerd Wolfgang Schellenberg Kolbenpumpe, insbesondere zum foerdern von beton und anderen breiigen massen
US3963385A (en) * 1975-05-05 1976-06-15 Caban Angel M Valve assembly for concrete pumps
DE2542066A1 (de) * 1975-07-31 1977-02-17 Schwing Friedrich Mehrzylinderkolbenpumpe fuer die betonfoerderung
DE2614895A1 (de) * 1976-04-07 1977-10-20 Schlecht Karl Beton-rohrweiche
DE2632816C2 (de) * 1976-07-21 1982-07-29 Friedrich Wilh. Schwing Gmbh, 4690 Herne Abdichtvorrichtung für eine Doppelzylinderpumpe, insbesondere für die Förderung von Beton
DE2716954A1 (de) * 1977-04-16 1978-10-19 Schwing Friedrich Betonpumpe
DE2903749C2 (de) * 1979-02-01 1983-11-10 Karl Dipl.-Ing. 7000 Stuttgart Schlecht Kolbenpumpe mit S-förmig gekrümmtem Schwenkrohr

Also Published As

Publication number Publication date
CS219288B2 (en) 1983-03-25
US4373875A (en) 1983-02-15
CA1156089A (en) 1983-11-01
DD152607A5 (de) 1981-12-02
ES8103809A1 (es) 1981-03-16
EP0024343A1 (de) 1981-03-04
JPS5629077A (en) 1981-03-23
YU41938B (en) 1988-02-29
ZA805037B (en) 1981-09-30
AR220645A1 (es) 1980-11-14
HU183198B (en) 1984-04-28
ATE1204T1 (de) 1982-07-15
AU6147880A (en) 1981-02-19
PL226212A1 (pl) 1981-04-10
PL129910B1 (en) 1984-06-30
DE2933128C2 (de) 1985-09-26
JPS5823511B2 (ja) 1983-05-16
MX150696A (es) 1984-06-28
ES494213A0 (es) 1981-03-16
DE2933128A1 (de) 1981-02-26
YU199580A (en) 1983-02-28
SU1163803A3 (ru) 1985-06-23
BR8005186A (pt) 1981-03-04
AU538946B2 (en) 1984-09-06

Similar Documents

Publication Publication Date Title
EP0024343B1 (de) Pumpe zur Förderung von Dickstoffen, insbesondere von Beton
EP0022851B1 (de) Zweizylinder-pumpe, insbesondere zur förderung von dickstoffen
DE2632816C2 (de) Abdichtvorrichtung für eine Doppelzylinderpumpe, insbesondere für die Förderung von Beton
EP2002121B1 (de) Kolbenpumpe für dickstoffe
DE974232C (de) Hydraulische Verdraengereinrichtung, Pumpe oder Motor, insbesondere fuer Getriebe
DE3149067A1 (de) "kupplung zur reibschluessigen drehverbindung von maschinenteilen, wie z.b. nabe und welle"
DE2614895A1 (de) Beton-rohrweiche
DE4306830C2 (de) Schlammpumpe
DE941343C (de) Steuerung fuer Fluessigkeitspumpen und -getriebe
EP0988244A1 (de) Vorrichtung für den materialaustrag aus einem silo
DE3122825C2 (de) Vorrichtung zur Förderung von breiigen Massen, insbesondere Beton
DE3430193A1 (de) Schwenkrohrsystem fuer betonpumpen
EP0099000B1 (de) Kolbenmaschine mit sternförmig angeordneten Zylindern
CH623894A5 (en) Hydraulic screw machine
DE3009746A1 (de) Steuerschieber einer betonpumpe
DE102019116601A1 (de) Schlauchquetschpumpe
CH348322A (de) Mehrzylindrige, eine Ölpumpe oder einen Ölmotor darstellende Vorrichtung
DE4315186C2 (de) Pumpenanordnung
DE1453481A1 (de) Axialkolbenpumpe oder -motor
DE102010046649A1 (de) Dickstoffpumpe und Verfahren zur kontinuierlichen Förderung von Dickstoff
DE8136101U1 (de) "kupplung zur reibschluessigen drehverbindung von maschinenteilen, wie z.b. nabe und welle"
DE1900965A1 (de) Axial-Tauchkolben-Pumpe oder -Motor
DE19822144A1 (de) Druckbehandlungswalze
DE2851354A1 (de) Pumpe fuer breiige massen, vorzugsweise beton
EP0485862B1 (de) Dickstoffpumpe mit paarweise abwechselnd fördernden und ansaugenden Förderzylindern

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

AK Designated contracting states

Designated state(s): AT BE CH FR GB IT NL SE

17P Request for examination filed

Effective date: 19810226

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH FR GB IT NL SE

REF Corresponds to:

Ref document number: 1204

Country of ref document: AT

Date of ref document: 19820715

Kind code of ref document: T

ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 80104781.2

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19970822

Year of fee payment: 18

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980813

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19990730

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19990817

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19990820

Year of fee payment: 20

Ref country code: CH

Payment date: 19990820

Year of fee payment: 20

Ref country code: BE

Payment date: 19990820

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19990823

Year of fee payment: 20

BE20 Be: patent expired

Free format text: 20000813 *FRIEDRICH WILH. SCHWING G.M.B.H.

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20000812

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20000812

Ref country code: CH

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20000812

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20000813

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 20000830

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Effective date: 20000812

NLV7 Nl: ceased due to reaching the maximum lifetime of a patent

Effective date: 20000813

EUG Se: european patent has lapsed

Ref document number: 80104781.2

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT