EP0370610A1 - Suction cleaner - Google Patents
Suction cleaner Download PDFInfo
- Publication number
- EP0370610A1 EP0370610A1 EP89310296A EP89310296A EP0370610A1 EP 0370610 A1 EP0370610 A1 EP 0370610A1 EP 89310296 A EP89310296 A EP 89310296A EP 89310296 A EP89310296 A EP 89310296A EP 0370610 A1 EP0370610 A1 EP 0370610A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- power output
- motor
- period
- suction cleaner
- control
- 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.)
- Granted
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2894—Details related to signal transmission in suction cleaners
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
- A47L9/2842—Suction motors or blowers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2857—User input or output elements for control, e.g. buttons, switches or displays
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Vacuum Cleaner (AREA)
Abstract
Description
- The present invention relates to suction cleaners and in particular to suction cleaners having a "power boost" facility, that is a facility whereby the user has the option of boosting the suction power for a short period, for example in order to remove dirt from particularly heavily soiled areas of the floor, by running the main suction motor temporarily at a power level exceeding its rated power.
- Suction cleaners having power boost features of this type are already known, but they are rather inflexible. The user requiring additional power for a short period presses a "power boost" button, which causes the main suction motor to operate at a power in excess of it rated power level for a fixed period, say ten seconds, then reverting to its previous power level. There then follows a timed recovery period of say sixty seconds, to allow the motor to cool off, during which the power boost facility cannot be activated again.
- Although the known cleaners are very effective if the power boost facility is not required too often, they are not particularly suited for the fairly common situation in which the user would like a little extra power, fairly frequently but for short periods, for example to deal with a number of small, but closely spaced, heavily soiled patches on a floor.
- It is an object of the present invention at least to alleviate the problems of the prior art.
- It is a further object of the invention to provide a suction cleaner with an improved power boost facility, giving the user increased control.
- According to the present invention a suction cleaner has control means arranged to control the power output of a variable speed suction motor, and user operable switch means coupled to the control means on the actuation of which for a limited period the control means causes the motor to operate at a power output in excess of its rated power output and on the release of which the control means causes the motor to return to a power output not exceeding its rated power output. Preferably, the control means may cause the motor to return to the previously prevailing power output.
- Boost timing means may be provided which are arranged to time the period of boosted power output over a plurality of actuations of the switch means, with boost inhibit means being arranged to inhibit operation of the motor at the boosted power output for a recovery period once the cumulative period of boosted power output exceeds a limit value.
- The cleaner may include recovery timing means arranged to time the recovery period and means for lifting the inhibit at the end of the recovery period.
- The cleaner may also include reset means arranged to reset the said cumulative period of boosted power output to zero if the switch means is not actuated during the recovery period. In one specific embodiment, the recovery period is suspended if the motor is stopped during the recovery period and resumed when the motor starts again. In an alternative embodiment, the recovery period continues even when the motor is stopped.
- Desirably, the control means comprises a microprocessor. The various timing means, the inhibit means, and the means for lifting the inhibit may also be provided by the microprocessor.
- The switch means may be arranged to produce a signal on a control line when actuated, the microprocessor being arranged to read the signal on the control line, for example after a fixed number of clock cycles.
- Conveniently, the signal on the control line may be a voltage signal, which is applied to the microprocessor via an analogue to digital converter. The use of such a converter enables the control line to be used for several different things at once. In particular, the control line may in addition be arranged to carry other signals, at different voltages, representative of the actuation of other user operable switch means. Such switch means may include, for example, an on/off switch for the cleaner, a switch instructing the control means to increase the power output of the suction motor, and a switch instructing the control means to decrease the power output of the suction motor.
- The switch means may be on a hand grip, with the control line passing from the grip, along a suction hose, to the microprocessor in the main cleaner body. To enable a power-driven rotating brush to be incorporated in the suction nozzle, the hose may carry exactly three lines, the control line, a live ac power line, and a line serving the dual function of neutral power line and Ov reference for control signalling.
- For the purposes of this specification the rated power output of the motor means any one of the following: (a) the maximum available power output of the motor, running at a constant speed; (b) a statement to that effect made by the manufacturer.
- The invention may be carried into practice in a number of ways and one specific embodiment will now be described, by way of example, with reference to the drawings, in which:
- Figure 1 is a simplied block diagram showing the power boost circuitry;
- Figure 2 is a more detailed circuit diagram showing the circuit on the cleaner body;
- Figure 3 is a detailed circuit diagram showing the hand grip controls;
- Figure 4 shows how the motor supply voltage and triac control line voltage varies with motor power levels;
- and figure 5 is a flow diagram illustrating the microprocessor timing routine.
- Figure 1 is a simplified block diagram of an embodiment of the invention. The suction cleaner is illustrated very schematically by a first
dotted line 10 which represents the main cleaner body, which is desirably of the canister or cylinder type, and a seconddotted line 12 which represents a hand grip and control panel on the cleaner hose. The hose itself is not shown, but it will be appreciated that thecontrol lines 14 extending between the body and the hand grip will in practice pass down the hose. - Within the
cleaner body 10 there is amain suction motor 16, supplied with power from external A/C mains terminals 18, and adjustable in power output by means of a triacmotor control circuit 20. Control is effected by applying a variable width squarewave signal to the triac gate along aline 23 from amicroprocessor 22. As may be seen in figure 4, themicroprocessor 22 is arranged to produce a signal along theline 23 having one of a number of pulse widths, corresponding to 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% and 120% of the rated motor power. Examples of these may be seen respectively in the lower traces of the graphs A to D; the upper graphs show the corresponding motor supply voltages. The situation illustrated in figure 4D, with the signal on theline 23 remaining high, corresponds to the "power boost" situation in which the motor is running, for a limited period, at a power level in excess of its rated value. - The
microprocessor 22 determines which of the signals, A to D (or other signals for intermediate power settings), to apply to theline 23 in accordance with an input received from an analogue todigital converter 24 which, in turn, receives an input signal along adata line 26 which stretches from the cleaner body along the hose to the hand grip. The user of the cleaner can vary the voltage on theline 26, and thus the power of the motor, by pressing an "increase power"button 28, a "decrease power"button 30 or a "power boost"button 32 on the hand grip. These three buttons are switches which are connected to theline 26 at different points in apotential divider 34. Thus, pressing a particular button will result in a particular voltage on theline 26. This voltage is converted into a digital signal by the analogue todigital converter 24, and the output from this converter is scanned cyclically by themicroprocessor 22, a particular value being recognised as being, for example, "boost button pressed". To ensure that the various voltage values on theline 26 are well defined, the line is attached within the cleaner body to a pull-up resistor 40 which is itself connected to the positive terminal of a D/C power supply 42. - An on/off
switch 36 is provided in theline 26, on the hand grip, and the microprocessor is arranged to recognise an open circuit as an instruction to switch off themain motor 16 entirely. - Completing the circuit from the far end of the
potential divider 34 to the neutral mains terminal is a neutral and zerovolts reference line 38. - The width of the squarewave signal which the microprocessor places on the
control line 23 in dependence upon the power setting selected is timed in relation to a zerocrossing reference 44 derived from the mains power supply. Thus, the voltage on the line goes high a specified number of milliseconds after the zero crossing of the mains voltage, depending upon the power setting selected, and is then reset to low on the next zero crossing. - Motor power control is incremental by means of the "increase power" 28 and "decrease power" 30 buttons. Depression of the first of these buttons gives rise to advancement of the triac firing point to the next of a number of stored time values, whereas depression of the latter button retards the firing point.
- Figure 2 and 3 are more detailed circuit diagrams of the circuits shown in simplified form in figure 1. It is not proposed to discuss these figures in detail since it should be evident from the corresponding numerals shown on figure 1 which parts of the complete circuit are involved in power boost operation. It will clearly be seen that, in practice, the signal on the
control line 23 is applied to the base of a control transistor TR1, which switches the triac gate voltage to plus eight volts when the signal on theline 23 goes high. - In use, when the
power boost button 32 is pressed the suction capability of the cleaner is increased to 120% of the rated motor power by making thetriac 20 conduct over the entire mains cycle. When thebutton 32 is released the cleaner reverts to its previous power level. Of course, this boosted power level cannot be continued indefinitely since it would cause the motor to overheat, and the microprocessor is therefore programmed to allow the boost facility to be used for a maximum period of ten seconds at a time; after this period, use of the boost facility is inhibited for a recovery period of one minute, after which the facility can again be used for up to a further ten seconds. If thebutton 32 is depressed for a period of less than ten seconds, boost operation may be activated again repeatedly until an aggregate boost duration of ten seconds is reached, whereupon the one minute recovery period will be executed. - Thus, a user of the cleaner is able to use the boost facility for short periods, relatively frequently, whenever a particularly soiled patch of floor is encountered. This is in contrast to the known "boost facilities" available on current cleaners, where pressing the boost button provides a boosted power output for a fixed period of, for example, ten seconds regardless of the period for which the button is depressed. After that, the facility is disabled entirely until the end of the recovery period. Accordingly, the boost facility is somewhat inflexible.
- The timing arrangements for the boost facility of the present invention are determined by the programming of the
microprocessor 22, and can therefore be very flexible. An exemplary flow diagram of a possible timing routine is shown in figure 5. This timing routine operates on a fixed clock cycle, that is it restarts from point x every, for example, 0.1 seconds. The time required to complete the loop, that is between starting from point x and returning to that point, will of course be less than 0.1 seconds. - As will be evident to the reader if the flow chart is followed through carefully, the routine shown incorporates cumulative timing of power boost periods, with the sixty seconds recovery period being commenced on reaching an aggregate power boost period of ten seconds. Cumulative power boost duration is also reset to zero if sixty seconds elapse between any two actuations of the power boost button. If the motor is stopped by actuation of the on/off
switch 36, timing is continued as power is still available to themicroprocessor 22. In an alternative arrangement (not shown) the recovery period could be suspended if the motor is stopped during such a period and resumed when the motor starts again. This latter arrangement may in some ways be desirable since the motor cools down only fairly slowly when it is stationary. - Finally, turning back again to figure 1, it will be appreciated that the analogue to
digital converter 24 could be dispensed with if thepower boost button 32 were to be located on the cleaner body or, alternatively, if thecontrol line 26 were used to carry only a signal indicative of the power boost button being depressed or otherwise. The reason that theconverter 24 is used in the preferred embodiment is that it enables asingle line 26 to be used for several different purposes. This enables the number of lines passing down the hose to be kept small. In particular, in the preferred embodiment there are only three lines, thedataline 26, the neutral and zerovolt reference line 38, and a live line (50 in figure 2) which is used to supply mains power to a powered nozzle (not shown) at the end of the hose.
Claims (11)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8824484 | 1988-10-19 | ||
GB8824484A GB2225219B (en) | 1988-10-19 | 1988-10-19 | Suction cleaner |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0370610A1 true EP0370610A1 (en) | 1990-05-30 |
EP0370610B1 EP0370610B1 (en) | 1993-09-29 |
Family
ID=10645446
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890310296 Expired - Lifetime EP0370610B1 (en) | 1988-10-19 | 1989-10-09 | Suction cleaner |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0370610B1 (en) |
AU (1) | AU626591B2 (en) |
DE (1) | DE68909563T2 (en) |
GB (1) | GB2225219B (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0506187A1 (en) * | 1991-03-29 | 1992-09-30 | Koninklijke Philips Electronics N.V. | Apparatus at least comprising an electric motor with variable motor power |
DE4116407A1 (en) * | 1991-05-18 | 1992-11-19 | Preh Elektro Feinmechanik | Electronic control circuit for vacuum cleaner motor - uses microprocessor reading required motor direction and approach of full dust-bag condition with optical coupler to motor |
EP0641538A1 (en) * | 1993-08-12 | 1995-03-08 | Gerhard Kurz | Vacuum cleaner power control device |
WO2001028401A1 (en) * | 1999-10-21 | 2001-04-26 | Dyson Limited | Improvements relating to floor cleaning devices |
WO2007063377A2 (en) * | 2005-11-29 | 2007-06-07 | Kostec Sa | Portable household appliance |
JP2015221152A (en) * | 2014-05-23 | 2015-12-10 | 三菱電機株式会社 | Vacuum cleaner |
EP2659824A3 (en) * | 2012-05-01 | 2016-01-13 | Makita Corporation | Fluid apparatus |
EP3278697A1 (en) * | 2016-07-08 | 2018-02-07 | Miele & Cie. KG | Method and device for operating a motor driven with alternating current for a floor cleaning device and floor cleaning device |
EP3446610A1 (en) * | 2017-08-22 | 2019-02-27 | Miele & Cie. KG | Vacuum cleaner and method for operating same |
EP3446609A1 (en) * | 2017-08-22 | 2019-02-27 | Miele & Cie. KG | Vacuum cleaner and method for operating same |
EP3453297A3 (en) * | 2017-09-07 | 2019-03-27 | Miele & Cie. KG | Control unit and method for controlling an intermediate power stage for a vacuum cleaner |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2291791A (en) * | 1994-07-26 | 1996-02-07 | Buki Bamboeur Omoyiola | Power driven toilet bowl cleaner |
DE102013205661A1 (en) | 2013-03-28 | 2014-10-02 | BSH Bosch und Siemens Hausgeräte GmbH | Floor care device with energy saving function |
US9456726B2 (en) | 2013-11-22 | 2016-10-04 | Techtronic Industries Co. Ltd. | Battery-powered cordless cleaning system |
DE102014108479A1 (en) * | 2014-06-17 | 2015-12-17 | Miele & Cie. Kg | Method and adjusting device for adjusting an operating performance of a suction device, a handle for guiding a suction device and a suction device |
DE102014115828A1 (en) * | 2014-10-30 | 2016-05-04 | Miele & Cie. Kg | Adjusting device and method for adjusting a power consumption of a vacuum cleaner |
DE102015106878A1 (en) * | 2015-05-04 | 2016-11-10 | Miele & Cie. Kg | Vacuum cleaner and method for controlling a power supply in a vacuum cleaner |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2082351A (en) * | 1980-08-08 | 1982-03-03 | Mauz & Pfeiffer Progress | Vacuum cleaner with a constant air stream |
US4654924A (en) * | 1985-12-31 | 1987-04-07 | Whirlpool Corporation | Microcomputer control system for a canister vacuum cleaner |
WO1987001921A1 (en) * | 1985-10-04 | 1987-04-09 | Aktiebolaget Electrolux | Arrangement in a vacuum cleaner |
WO1988007347A1 (en) * | 1987-04-02 | 1988-10-06 | Matsushita Electric Industrial Co., Ltd. | Vaccum cleaner |
EP0299322A2 (en) * | 1987-07-16 | 1989-01-18 | Siemens Aktiengesellschaft | Control switch for a vacuum cleaner motor fan |
-
1988
- 1988-10-19 GB GB8824484A patent/GB2225219B/en not_active Expired - Fee Related
-
1989
- 1989-10-09 DE DE1989609563 patent/DE68909563T2/en not_active Expired - Lifetime
- 1989-10-09 EP EP19890310296 patent/EP0370610B1/en not_active Expired - Lifetime
- 1989-10-17 AU AU42965/89A patent/AU626591B2/en not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2082351A (en) * | 1980-08-08 | 1982-03-03 | Mauz & Pfeiffer Progress | Vacuum cleaner with a constant air stream |
WO1987001921A1 (en) * | 1985-10-04 | 1987-04-09 | Aktiebolaget Electrolux | Arrangement in a vacuum cleaner |
US4654924A (en) * | 1985-12-31 | 1987-04-07 | Whirlpool Corporation | Microcomputer control system for a canister vacuum cleaner |
WO1988007347A1 (en) * | 1987-04-02 | 1988-10-06 | Matsushita Electric Industrial Co., Ltd. | Vaccum cleaner |
EP0299322A2 (en) * | 1987-07-16 | 1989-01-18 | Siemens Aktiengesellschaft | Control switch for a vacuum cleaner motor fan |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0506187A1 (en) * | 1991-03-29 | 1992-09-30 | Koninklijke Philips Electronics N.V. | Apparatus at least comprising an electric motor with variable motor power |
US5355548A (en) * | 1991-03-29 | 1994-10-18 | U.S. Philips Corporation | Apparatus comprising an electric motor with variable motor power |
DE4116407A1 (en) * | 1991-05-18 | 1992-11-19 | Preh Elektro Feinmechanik | Electronic control circuit for vacuum cleaner motor - uses microprocessor reading required motor direction and approach of full dust-bag condition with optical coupler to motor |
EP0641538A1 (en) * | 1993-08-12 | 1995-03-08 | Gerhard Kurz | Vacuum cleaner power control device |
US5554917A (en) * | 1993-08-12 | 1996-09-10 | Gerhard Kurz | Apparatus for regulating the power consumption of a vacuum cleaner |
WO2001028401A1 (en) * | 1999-10-21 | 2001-04-26 | Dyson Limited | Improvements relating to floor cleaning devices |
WO2007063377A2 (en) * | 2005-11-29 | 2007-06-07 | Kostec Sa | Portable household appliance |
WO2007063377A3 (en) * | 2005-11-29 | 2007-11-15 | Massimiliano Pineschi | Portable household appliance |
US7950107B2 (en) | 2005-11-29 | 2011-05-31 | Kostec Sa | Portable household appliance |
EP2659824A3 (en) * | 2012-05-01 | 2016-01-13 | Makita Corporation | Fluid apparatus |
JP2015221152A (en) * | 2014-05-23 | 2015-12-10 | 三菱電機株式会社 | Vacuum cleaner |
EP3278697A1 (en) * | 2016-07-08 | 2018-02-07 | Miele & Cie. KG | Method and device for operating a motor driven with alternating current for a floor cleaning device and floor cleaning device |
EP3446610A1 (en) * | 2017-08-22 | 2019-02-27 | Miele & Cie. KG | Vacuum cleaner and method for operating same |
EP3446609A1 (en) * | 2017-08-22 | 2019-02-27 | Miele & Cie. KG | Vacuum cleaner and method for operating same |
EP3453297A3 (en) * | 2017-09-07 | 2019-03-27 | Miele & Cie. KG | Control unit and method for controlling an intermediate power stage for a vacuum cleaner |
Also Published As
Publication number | Publication date |
---|---|
AU4296589A (en) | 1990-05-03 |
DE68909563T2 (en) | 1994-06-16 |
EP0370610B1 (en) | 1993-09-29 |
GB2225219A (en) | 1990-05-30 |
GB2225219B (en) | 1992-08-26 |
GB8824484D0 (en) | 1988-11-23 |
AU626591B2 (en) | 1992-08-06 |
DE68909563D1 (en) | 1993-11-04 |
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