EP0381765B1 - Washing and drying machine - Google Patents
Washing and drying machine Download PDFInfo
- Publication number
- EP0381765B1 EP0381765B1 EP89907274A EP89907274A EP0381765B1 EP 0381765 B1 EP0381765 B1 EP 0381765B1 EP 89907274 A EP89907274 A EP 89907274A EP 89907274 A EP89907274 A EP 89907274A EP 0381765 B1 EP0381765 B1 EP 0381765B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water tub
- washing
- drying
- water
- tilting
- 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 - Lifetime
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Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/04—Quantity, e.g. weight or variation of weight
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/18—Washing liquid level
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/62—Stopping or disabling machine operation
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/18—Condition of the laundry, e.g. nature or weight
Definitions
- This invention relates to a washing-drying machine which can continuously carry out the steps of washing, rinsing, spinning to drying.
- a washing-drying machine the one designed as shown in Fig. 14 and Fig. 15 has been devised. That is, a water tub 2 is tiltably supported by a horizontal shaft 3 in a washing-drying machine main body 1, wherein a rotary drum 4 is rotatably supported with a rotary shaft 5 within the water tub 2.
- a drive switching device 6 for switching to a pulsator or to the rotary drum 4 and an electric motor 7a for driving the rotary shaft 5 are arranged at the lower part of the water tub 2.
- the rotary shaft 5 and the electric motor 7a are connected by a belt.
- a displacement electric motor 7b is secured to a main body 1, whereby a pinion gear 9 meshing with a worm gear 8 which is driven by the displacement electric motor 7b is secured to the horizontal shaft 3.
- the pinion gear 9 is driven, whereby the horizontal shaft 3 rotates to tilt the water tub 2 around the horizontal shaft 3.
- a fan 10 to be used during the drying step is connected to a duct 12 through a heater 11, and the duct 12 communicates with the interior of the water tub 2.
- the numeral 13 designates a water outlet.
- the laundry is put in the water tub 2 and the machine is turned on.
- the washing-rinsing-spinning step is carried out in the vertical state of the water tub 2 as shown by solid lines in Fig.14 and Fig.15, and, after finishing the final spinning step, the displacement electric motor 7b, and hence the worm gear 8, drives the pinion gear 9, which tilts the water tub 2 into a horizontal posture, whereby the step proceeds to the drying one.
- This state is shown by the two-dot chain lines in Fig.14.
- the rotary drum 4 is rotated, and the fan 10 and the heater 11 are powered to carry out the drying step.
- the washing-drying machine of the above-mentioned design since the horizontal shaft 3 for tilting the water tub 2 is arranged at the outside of the water tub 2 and in the front and rear direction of the main body 1, the bottom area of the main body 1 is increased; and hence in order to make the same size as a washing-drying machine of conventional ones, the size of the water tub 2 has to be decreased and thus the washable-dryable laundry amount thereof is decreased.
- the horizontal shaft 3 for supporting and tilting the water tub 2 is arranged at the side walls of the main body 1 and the water outlet 13 is arranged at the side wall, the orbit of the water outlet 13 during tilting of the water tub 2 becomes large, and the water tub 2 cannot have sufficient capacity in the limited space of the main body 1, thereby problematically diminishing the washing-drying laundry amount.
- an arrangement of a horizontal shaft 3 at the cornering parts of the main body 1 has been invented, there is a problem that the orbits of the upper part and the bottom part of the cylindrical water tub 2 of the said machine during the tilting of the water tub 2 interfere the side walls of the main body 1, and the capacity of the water tub 2 cannot be secured sufficiently.
- the dryable laundry amount is about a half of the washable-rinsable-spinable laundry amount; and the laundry amount exceeding that limit protracts the drying time, and badly forms uneven dryness and any wrinkles. Therefore, the user must judge whether he or she carries out only the washing-rinsing-spinning step or can continue until the drying step, in compliance with the laundry amount before starting the washing, and this is very inconvenient.
- a first object of the present invention is to obtain a tilting device for efficiently utilizing a main body capacity.
- a second object is to obtain a water outlet and an overflow outlet for efficiently utilizing the main body capacity.
- a third object is to obtain a construction of the water tub for efficiently utilizing the main body capacity.
- a fourth object is to obtain a very reliable and simple construction of the drying device.
- a fifth object is to obtain a high reliability free of water leakage under any running condition.
- a sixth object is to detect the laundry amount before starting the drying step, and to properly judge whether operation until the drying step is possible, in order to convenience the user.
- the present invention provides a pair of tilting shafts for enabling tilting of a water tub at diagonal corners of a main body, whereby the tilting shafts are positioned at corner parts of a main body, thereby maximizing the water tub and efficiently utilizing the capacity in the main body, even in the case of the tilting of the water tub.
- the machine according to the invention develops the machine of the JP-A-62 022 688 further by providing that the water tube is formed into a substantially cylindrical shape having the upper and bottom parts thereof formed substantially truncated-cone.
- the present invention provides a pair of tilting shafts at diagonal corners of a main body, arranges a water outlet so as to position it in the vicinity of corners of a main body when a water tub is tilted almost horizontally, and arranges an overflow outlet so as to position it in the vicinity of the corners of the main body when the water tub is uprighted almost vertically, whereby the orbits of the water outlet and the overflow outlet pass through the corner parts of the main body during the tilting of the water tub, thereby efficiently utilizing the main body capacity and enlarging the water tub.
- the present invention provides a pair of tilting shafts at diagonal corners of a main body, and gives the water tub an almost cylindrical shape having the upper and bottom parts thereof formed almost truncated-cones, whereby the orbit of the water tub during the tilting can be small, thereby enlarging the water tub.
- the present invention arranges a blowing-in port for introducing air for drying laundry into a water tub and an exhaust outlet of the water tub at the upper opening part thereof, whereby the water does not encroach the path of the drying air, thereby realizing reliable washing-drying machine free of electricity leakage and water leakage of a simple construction.
- the present invention has a controlling device which carries out washing-rinsing-spinning step in almost vertical state of a water tub and carries out the drying step in almost horizontal state of the water tub thereby spinning the laundry before starting of the driving of the tilting device, whereby the water does not leak and can offer a high reliability even when the water remains in the water tub before the tilting.
- the present invention has a laundry amount detecting means for detecting the laundry amount before the driving step and a controlling device which when detecting exceeding of laundry amount above a predetermined limit stops proceeding to the drying, whereby the user needs not judge whether he can carry out only the washing-rinsing-spinning step or can continue until the drying step in compliance with the laundry amount before starting the washing, thereby improving the conveniences greatly.
- Fig.1 is a longitudinally sectional view showing a washing-drying machine embodying the present invention in a vertical state
- Fig.2 is a longitudinally sectional view showing the same in a horizontal state
- Fig.3 is a perspective view partly broken away and showing the same
- Fig.4 is an opened-up view showing a bottom-part of the same
- Fig.5 is an enlarged sectional view showing a water tub part of the same
- Fig.6 is a sectional view showing a speed-reducing device of the same
- Fig.7 is an enlarged cross sectional view showing a vicinity of a tilting speed reduction gear of the same
- Fig.8 is a schematic view showing a limit switch part
- Fig.9 is a diagrammatic view showing a flow of a drying air
- Fig.10 is a horizontal sectional view showing the washing-drying machine during the washing-rinsing-spinning step
- Fig.11 is a horizontal sectional view showing the washing-drying
- numeral 14 designates a prism-like main body and numeral 15 a main body having a laundry receiving opening 16 at its central upper part.
- Numeral 17 designates an openable outer lid for covering the laundry receiving opening 16, and
- numeral 18A a water tub whose lower part is formed reversely truncated-cone so as to enlarge the water tub capacity without interfering the main body A 14 during the tilting.
- numeral 18B designates a water tub whose upper part is formed truncated-cone so as to enlarge the water tub capacity without interfering the main body 14 during the tilting.
- the water tub 18A and the water tub 18B compose a water tub.
- Numeral 19 designates a watertightening seal member which is arranged at the fitting part between the water tub 18A and the water tub 18B and detail whereof is shown in Fig.5.
- Numeral 20 designates an openable lid arranged centrally of the upper part of the water tub 18B.
- Numeral 21 designates an overflow outlet which is positioned in the vicinity of a corner of the main body 14 for making the water overflow during the irrigating-rinsing, etc.
- Numeral 22 designates a water outlet for communicating with the overflow outlet 21 at the outside of the water tub 18A, which water outlet is arranged so as to be positioned in the vicinity of a corner of the main body 14 when the water tub is almost horizontal.
- Numeral 23 designates a remaining water detector which is arranged at the bottom part of the water tub 18 and consists of a pair of electrodes.
- the water tub 18A comprises therein a rotary drum 25 provided with water passing perforations and a balancer 24, and a pulsator 26.
- the pulsator 26 is fitted on a washing shaft 28 of a mechanical part 27, and the rotary drum 25 is connected to a spinning shaft 29 of the mechanical part 27.
- Numeral 30 designates an input shaft of the mechanical part 27.
- the input shaft 30 comprises a mechanical pulley 31 and a mechanical pulley 32.
- Numeral 33 designates a washing electric motor, and numeral 34 a washing pulley provided to the washing electric motor 33, and the mechanical pulley 31 is linked with the washing pulley 34 with a belt 35.
- numeral 36 designates a drying electric motor
- numeral 37 a speed reduction gear consisting of a worm gear and a worm wheel which is connected with the drying electric motor 36
- numeral 38 designates a drying pulley fitted on the drying electric motor 36
- the speed reduction gear 37 is connected to the drying pulley 38 with a connectable and releasable clutch 39.
- Numeral 40 designates a belt for connecting the mechanical pulley 32 to the drying pulley 38.
- Numeral 41 designates an electric motor mount which is attached to the bottom surface of the water tub 18A and to which are secured the mechanical part 27, the washing electric motor 33 and the drying electric motor 36.
- Numeral 42 designates a pillar, numeral 43 a tilting shaft arranged at the pillar 42 so as to be positioned at the diagonal corner part of the main body 14.
- the pillar 42 is secured to the electric motor mount 41, and a unit including the electric motor mount 41, the tilting shafts 43, and the pillar 42 is called a support.
- Numeral 44 designates a reinforcer fitted around the outside periphery of the water tub 18A and secured to the pillar 42 at both ends thereof; and numeral 45 designates two suspensions for suspending the water tub, the support, etc. at the part of tilting shaft 43 from the main body 14.
- Numeral 46 designates a base which is secured to the bottom surface of the main body 14 and to which are secured a blower 47, a heat exchanger 48 for condensation, and a tilting electric motor 49 for tilting the water tub.
- Fig.7 shows a tilting device, wherein numeral 50 designates a tilting clutch for connecting or releasing the output shaft 51 of the tilting electric motor to or from an input shaft 53 of a tilting speed reducing device 52.
- the tilting speed reducing 52 is so designed that its input shaft 53 comprises a worm gear 54 which meshes a worm wheel 57 arranged on an output shaft 56 of the tilting speed reducing device so as to reduce the speed.
- the guide pulley 60 and the guide Pulley 61 are moved by a certain distance by the tension of the wire 58, and respectively have a springs 62 and a spring 63 for returning those pulleys to the initial positions when the tension of the wire 58 disappears.
- Numeral 64 designates a limit switch for detecting the vertical state of the water tub which is actuated by the guide pulley 61
- numeral 65 designates a limit switch for detecting the horizontal state of the water tub.
- Numeral 66 designates a fan duct which forms an airflow channel from the blower 47 to the heat exchanger 48
- numeral 67 designates a heater which is arranged at the upper part of the water tub 18B and opens a blowing-in port 68 for introducing the drying air into the water tub 18B, and communicates with a discharging duct 69, a discharging duct 70, and a sliding part 71.
- the heater 67 communicates with the discharging duct 70 through an expandable and collapsible bellows 72.
- Numeral 73 designates an exhaust outlet for the drying air which is opened at the bottom surface of an inner lid 20 which is provided with a filter 74.
- Numeral 75 designates an intake duct communicating with an intake duct 77 through a sliding part 76; and an intake duct 77 communicates with a fan intake duct 79 through an expandable and collapsible bellows 78.
- Fig.1 shows the state of the water tub during the washing-rinsing-spinning step.
- the washing shaft 28 of the rotary drum is uprighted vertical to the installation surface of the main body A 14 when the pulsator 26, which is connected to the washing shaft 28 with the mechanical part 27, is rotated by the washing electric motor 33 in predetermined forward/backward cycles.
- the laundry detecting means 81 judges the laundry amount.
- the dryable laundry amount is about a half of the washable one of the same vessel capacity; namely, if the latter is 4 kg, the former is 2 kg. Therefore, if the laundry amount is judged in excess of the predetermined limit, i.e., 2 kg, the controlling device 80 carries out only the washing-rinsing-spinning step, and then gives notice of "the washing finished” to inform the user thereof (the first through the 5th steps of Fig.13. If the user wishes to proceed and finish the drying, he or she takes away a part of the laundry and carries out the drying.
- the drying step succeeding the washing-rinsing-spinning step is carried out when notice of "the drying finished" is given (the 4th step, and the 6th through 9th steps of Fig,13.
- the water tub is filled with water for washing, the water tub 18A has been fittingly secured to the water tub 18B with the sealing member 19, which prevents the water from leaking out, affording a very high reliability.
- the rotary drum 25 is connected to the spinning shaft 29 with the mechanical part 27 and rotated at a high speed of about 800 rpm so as to dewater the laundry.
- the vibration of the rotary drum 25 is transferred to the suspensions 45 through the water tub 18A and the tilting shafts 43, to be damped there.
- the speed reduction gear 37 is disconnected from the drying pulley 38 with the clutch 39.
- the rotation of the washing electric motor 33 is not transferred to the speed reduction gear 37 and the drying electric motor 36, whereby the drives of the pulsator 26 and the rotary drum 25 are not hindered.
- the controlling device 80 carries out the spinning before the tilting of the water tub when the drying step is directly started. By doing this, the laundry has been dewatered when the water tub is tilted, and no water remains in the water tub, and a very high reliability free of water leakage during the tilting is afforded.
- the water tub is tilted.
- the tilting clutch is connected, the tilting electric motor is driven, and the winding up pulley 55 secured to the output shaft 56 of the tilting speed reduction gear winds up the wire 58, whereby the water tub is gradually tilted around the tilting shafts 43.
- the limit switch 65 is actuated so as to stop the tilting electric motor 49.
- the guide pulley 61 is moved by the tension of the wire 58, to release the limit switch 64.
- the tilting shafts 43 are arranged at the corner parts of the main body 14, the size of the water tub can be maximized in spite of its tilting, and the capacity of the main body can be effectively utilized.
- the bottom part and the upper part of the water tub 18A and the water tub 18B are formed in truncated-cones, they can get rid of interference with the side walls of the main body 14, and the capacity of the main body 14 can effectively be utilized, thereby to maximize the water tub capacity.
- the water outlet 22 is arranged so as to be positioned at the corner part of the main body 14 in case the water tub is horizontal and the overflow outlet 21 is arranged at the corner part of the main body 14, the orbits of the water outlet 22 and the overflow outlet 21 during the tilting pass through the cornering parts of the main body 14, and the capacity of the main body 14 can be effectively utilized thereby to enlarge the water tub.
- the tilting clutch 50 is released, and the blower 36 alone is driven by the tilting electric motor 49.
- the drying electric motor is driven, and the speed reduction gear 37 is connected to the drying pulley 38 with the clutch 39.
- the rotation speed of the drying electric motor 36 is decelerated to about 60 rpm by the speed reduction gear 37, and also the torque is increased, Hence, even a small electric motor can afford a great torque, and no complicated controlling device is needed to obtain a low speed.
- the rotary drum 25 begins to be rotated at a predetermined speed of about 60 rpm with the belt B 40 by the drying electric motor 36, so as to roll the laundry in the rotary drum 25.
- the drying air heated by the heater 67 is blown into the water tub through the blowing-in port 68, to dry the laundry.
- Air which has become much humid after drying the laundry goes through the exhaust outlet 73 and via a lint filter 74 to the heat exchanger 48, and is dehumidified, and thereafter returns to the blower. In this way, the air dries the laundry circuiting the course for the drying air.
- the cooling water for water-cooling the heat exchanger is timely supplied from the city water.
- the heater 67, the blowing-in port 68 for introducing the air in the water tub, and the exhaust outlet 73 are arranged at the upper part of the water tub, no water splashes the heater 67, nor does water encroach the course for the drying air, thereby offering a reliability of high safety free of electricity leakage and water leakage; and further since the air for drying is blown in the rotary drum 25 instantaneously after being heated, it very efficiently dries the laundry.
- the rotary drum 25 is stopped, the tilting clutch 50 is connected and the tilting electric motor 49 reversely rotates, to unwind the wire 58 which has been wound up around the winding up pulley 65.
- the present invention arranges the tilting shafts at the cornering parts of the washing machine main body, whereby it can wash a certain amount of laundry without enlarging the size of the main body of the washing machine.
- the present invention is that a pair of tilting shafts are arranged at the diagonal corners of the main body and a water outlet is arranged in the vicinity of the corner part of the main body; and when the water tub almost horizontalized, and arranges an overflow outlet in the vicinity of the cornering part of the main body, whereby the orbits of the water outlet and the overflow outlet during the tilting pass through the cornering parts of the main body, and the capacity of the main body can be utilized efficiently and the water tub can be made large.
- the present invention arranges the pair of tilting shafts at the diagonal corners of the main body, and gave the water tub almost a cylindrical shape having the upper part and bottom part thereof formed almost truncated-cone, and thereby the orbit of the water tub during the tilting is made small, and the water tub can be made large.
- the present invention provides a blowing-in port and an exhaust port at the upper part of the water tub, no water splashes the heater nor does water encroach the circular air course, thereby offering a reliability of high safety free of electricity leakage and water leakage.
- the present invention has a controlling device which carries out the washing-rinsing spinning step in the almost vertical state of the water tub and carries out the drying step in the almost horizontal state of the water tub and carries out the spinning step before the driving of the tilting device, whereby even when the water remains in the water tub before the tilting the water is removed by the spinning, and no water leaks during the tilting, thereby a high reliability can be offered.
- the present invention has a laundry amount detecting means for detecting the laundry amount before the drying step and the controlling device, and stops the step to the drying by the controlling device when exceeding of the laundry amount above the predetermined limit is detected, whereby the user needs not judge before starting the washing whether he or she must carry out only the washing-rinsing-spinning step or she can continue until the drying step depending on the laundry amount, and this gives conveniences.
Abstract
Description
- This invention relates to a washing-drying machine which can continuously carry out the steps of washing, rinsing, spinning to drying.
- Conventionally, as for a washing-drying machine, the one designed as shown in Fig. 14 and Fig. 15 has been devised. That is, a
water tub 2 is tiltably supported by ahorizontal shaft 3 in a washing-drying machinemain body 1, wherein arotary drum 4 is rotatably supported with arotary shaft 5 within thewater tub 2. Adrive switching device 6 for switching to a pulsator or to therotary drum 4 and an electric motor 7a for driving therotary shaft 5 are arranged at the lower part of thewater tub 2. Therotary shaft 5 and the electric motor 7a are connected by a belt. In the vicinity of the end part of thehorizontal shaft 3, a displacementelectric motor 7b is secured to amain body 1, whereby apinion gear 9 meshing with aworm gear 8 which is driven by the displacementelectric motor 7b is secured to thehorizontal shaft 3. When theworm gear 8 rotates, thepinion gear 9 is driven, whereby thehorizontal shaft 3 rotates to tilt thewater tub 2 around thehorizontal shaft 3. At the outside of the lower part of thewater tub 2, afan 10 to be used during the drying step is connected to aduct 12 through a heater 11, and theduct 12 communicates with the interior of thewater tub 2. Thenumeral 13 designates a water outlet. - In the above-mentioned construction, the laundry is put in the
water tub 2 and the machine is turned on. The washing-rinsing-spinning step is carried out in the vertical state of thewater tub 2 as shown by solid lines in Fig.14 and Fig.15, and, after finishing the final spinning step, the displacementelectric motor 7b, and hence theworm gear 8, drives thepinion gear 9, which tilts thewater tub 2 into a horizontal posture, whereby the step proceeds to the drying one. This state is shown by the two-dot chain lines in Fig.14. During the drying step, therotary drum 4 is rotated, and thefan 10 and the heater 11 are powered to carry out the drying step. - As for the washing-drying machine of the above-mentioned design, since the
horizontal shaft 3 for tilting thewater tub 2 is arranged at the outside of thewater tub 2 and in the front and rear direction of themain body 1, the bottom area of themain body 1 is increased; and hence in order to make the same size as a washing-drying machine of conventional ones, the size of thewater tub 2 has to be decreased and thus the washable-dryable laundry amount thereof is decreased. - Further, since the
horizontal shaft 3 for supporting and tilting thewater tub 2 is arranged at the side walls of themain body 1 and thewater outlet 13 is arranged at the side wall, the orbit of thewater outlet 13 during tilting of thewater tub 2 becomes large, and thewater tub 2 cannot have sufficient capacity in the limited space of themain body 1, thereby problematically diminishing the washing-drying laundry amount. Though an arrangement of ahorizontal shaft 3 at the cornering parts of themain body 1 has been invented, there is a problem that the orbits of the upper part and the bottom part of thecylindrical water tub 2 of the said machine during the tilting of thewater tub 2 interfere the side walls of themain body 1, and the capacity of thewater tub 2 cannot be secured sufficiently. - Further, during drying of the laundry the air for drying is heated and blown into the
water tub 2, and then the humid air after having dried the laundry is directly exhausted to the outside of the machine, and there arises a problem that the interior of the room becomes wet and the moisture is condensed into water on the wall surface. Though, on the other hand, a condensation type of a laundry drying machine provided with a heat-exchanger and a circular course of the air for drying may be proposed, in case of a washing-drying machine, during the washing it is necessary to contain water in the water tub, and it has a problem of injuring the reliability by encroaching of the water in the circular course, and besides, there is a problem of greatly complicating the circular course itself. - Moreover, since the machine probably carries out the drying step alone, instead of drying after the spinning step, and if the water remains in the water tub the water leaks out of the water tub and there arises since the drying is made with the water tub in horizontal state, and this makes a problem in reliability.
- Further, due to the capacity of the rotary drum, the dryable laundry amount is about a half of the washable-rinsable-spinable laundry amount; and the laundry amount exceeding that limit protracts the drying time, and badly forms uneven dryness and any wrinkles. Therefore, the user must judge whether he or she carries out only the washing-rinsing-spinning step or can continue until the drying step, in compliance with the laundry amount before starting the washing, and this is very inconvenient.
- From another prior art, as shown in the JP-A-62-022 688, already the precharacterizing features of
claim 1 are known. - A first object of the present invention is to obtain a tilting device for efficiently utilizing a main body capacity.
- A second object is to obtain a water outlet and an overflow outlet for efficiently utilizing the main body capacity.
- A third object is to obtain a construction of the water tub for efficiently utilizing the main body capacity.
- A fourth object is to obtain a very reliable and simple construction of the drying device.
- A fifth object is to obtain a high reliability free of water leakage under any running condition.
- A sixth object is to detect the laundry amount before starting the drying step, and to properly judge whether operation until the drying step is possible, in order to convenience the user.
- All mentioned objects are achievable by the features of
claim 1. - In order to accomplish the first object, the present invention provides a pair of tilting shafts for enabling tilting of a water tub at diagonal corners of a main body, whereby the tilting shafts are positioned at corner parts of a main body, thereby maximizing the water tub and efficiently utilizing the capacity in the main body, even in the case of the tilting of the water tub. In the context of this object (and of the third object, for instance) it is of importance as well that the machine according to the invention develops the machine of the JP-A-62 022 688 further by providing that the water tube is formed into a substantially cylindrical shape having the upper and bottom parts thereof formed substantially truncated-cone.
- In order to accomplish the second object, the present invention provides a pair of tilting shafts at diagonal corners of a main body, arranges a water outlet so as to position it in the vicinity of corners of a main body when a water tub is tilted almost horizontally, and arranges an overflow outlet so as to position it in the vicinity of the corners of the main body when the water tub is uprighted almost vertically, whereby the orbits of the water outlet and the overflow outlet pass through the corner parts of the main body during the tilting of the water tub, thereby efficiently utilizing the main body capacity and enlarging the water tub.
- In order to accomplish the third object, the present invention provides a pair of tilting shafts at diagonal corners of a main body, and gives the water tub an almost cylindrical shape having the upper and bottom parts thereof formed almost truncated-cones, whereby the orbit of the water tub during the tilting can be small, thereby enlarging the water tub.
- In order to accomplish the fourth object, the present invention arranges a blowing-in port for introducing air for drying laundry into a water tub and an exhaust outlet of the water tub at the upper opening part thereof, whereby the water does not encroach the path of the drying air, thereby realizing reliable washing-drying machine free of electricity leakage and water leakage of a simple construction.
- In order to accomplish the fifth object, the present invention has a controlling device which carries out washing-rinsing-spinning step in almost vertical state of a water tub and carries out the drying step in almost horizontal state of the water tub thereby spinning the laundry before starting of the driving of the tilting device, whereby the water does not leak and can offer a high reliability even when the water remains in the water tub before the tilting.
- In order to accomplish the sixth object, the present invention has a laundry amount detecting means for detecting the laundry amount before the driving step and a controlling device which when detecting exceeding of laundry amount above a predetermined limit stops proceeding to the drying, whereby the user needs not judge whether he can carry out only the washing-rinsing-spinning step or can continue until the drying step in compliance with the laundry amount before starting the washing, thereby improving the conveniences greatly.
- Fig.1 is a longitudinally sectional view showing a washing-drying machine embodying the present invention in a vertical state; Fig.2 is a longitudinally sectional view showing the same in a horizontal state; Fig.3 is a perspective view partly broken away and showing the same; Fig.4 is an opened-up view showing a bottom-part of the same; Fig.5 is an enlarged sectional view showing a water tub part of the same; Fig.6 is a sectional view showing a speed-reducing device of the same; Fig.7 is an enlarged cross sectional view showing a vicinity of a tilting speed reduction gear of the same; Fig.8 is a schematic view showing a limit switch part; Fig.9 is a diagrammatic view showing a flow of a drying air; Fig.10 is a horizontal sectional view showing the washing-drying machine during the washing-rinsing-spinning step; Fig.11 is a horizontal sectional view showing the washing-drying machine during the drying step; Fig.12 is an enlarged sectional view showing a bottom part of the water tub of the washing-drying machine; Fig.13 is a flow chart showing actions of the washing-drying machine; Fig.14 is the front sectional view showing the conventional washing-drying machine; and Fig.15 is the side sectional view showing the conventional washing-drying machine.
- Referring to the attached drawings, an embodiment of the present invention will be explained in the following. In Fig.1 through Fig.13,
numeral 14 designates a prism-like main body and numeral 15 a main body having a laundry receiving opening 16 at its central upper part. Numeral 17 designates an openable outer lid for covering the laundry receiving opening 16, andnumeral 18A a water tub whose lower part is formed reversely truncated-cone so as to enlarge the water tub capacity without interfering themain body A 14 during the tilting. Numeral 18B designates a water tub whose upper part is formed truncated-cone so as to enlarge the water tub capacity without interfering themain body 14 during the tilting. Thewater tub 18A and thewater tub 18B compose a water tub. Numeral 19 designates a watertightening seal member which is arranged at the fitting part between thewater tub 18A and thewater tub 18B and detail whereof is shown in Fig.5. Numeral 20 designates an openable lid arranged centrally of the upper part of thewater tub 18B. Numeral 21 designates an overflow outlet which is positioned in the vicinity of a corner of themain body 14 for making the water overflow during the irrigating-rinsing, etc. Numeral 22 designates a water outlet for communicating with theoverflow outlet 21 at the outside of thewater tub 18A, which water outlet is arranged so as to be positioned in the vicinity of a corner of themain body 14 when the water tub is almost horizontal. Numeral 23 designates a remaining water detector which is arranged at the bottom part of the water tub 18 and consists of a pair of electrodes. Thewater tub 18A comprises therein arotary drum 25 provided with water passing perforations and abalancer 24, and apulsator 26. Thepulsator 26 is fitted on awashing shaft 28 of amechanical part 27, and therotary drum 25 is connected to aspinning shaft 29 of themechanical part 27. Further, thespinning shaft 29 is timely connectable to and releasable from thewashing shaft 28 by the above-mentionedmechanical part 27. Numeral 30 designates an input shaft of themechanical part 27. Theinput shaft 30 comprises amechanical pulley 31 and amechanical pulley 32. Numeral 33 designates a washing electric motor, and numeral 34 a washing pulley provided to the washingelectric motor 33, and themechanical pulley 31 is linked with thewashing pulley 34 with abelt 35. - As shown in Fig.6,
numeral 36 designates a drying electric motor, numeral 37 a speed reduction gear consisting of a worm gear and a worm wheel which is connected with the dryingelectric motor 36. Numeral 38 designates a drying pulley fitted on the dryingelectric motor 36, and thespeed reduction gear 37 is connected to thedrying pulley 38 with a connectable andreleasable clutch 39. Numeral 40 designates a belt for connecting themechanical pulley 32 to thedrying pulley 38. Numeral 41 designates an electric motor mount which is attached to the bottom surface of thewater tub 18A and to which are secured themechanical part 27, the washingelectric motor 33 and the dryingelectric motor 36. Numeral 42 designates a pillar, numeral 43 a tilting shaft arranged at thepillar 42 so as to be positioned at the diagonal corner part of themain body 14. Thepillar 42 is secured to theelectric motor mount 41, and a unit including theelectric motor mount 41, the tiltingshafts 43, and thepillar 42 is called a support. Numeral 44 designates a reinforcer fitted around the outside periphery of thewater tub 18A and secured to thepillar 42 at both ends thereof; andnumeral 45 designates two suspensions for suspending the water tub, the support, etc. at the part of tiltingshaft 43 from themain body 14. Numeral 46 designates a base which is secured to the bottom surface of themain body 14 and to which are secured ablower 47, aheat exchanger 48 for condensation, and a tiltingelectric motor 49 for tilting the water tub. - Fig.7 shows a tilting device, wherein numeral 50 designates a tilting clutch for connecting or releasing the
output shaft 51 of the tilting electric motor to or from aninput shaft 53 of a tiltingspeed reducing device 52. The tilting speed reducing 52 is so designed that itsinput shaft 53 comprises aworm gear 54 which meshes aworm wheel 57 arranged on anoutput shaft 56 of the tilting speed reducing device so as to reduce the speed. As shown in Fig.8, awire 58 has its end secured to awire securing member 59 attached to theelectric motor mount 41, and winds its way around aguide pulley 60 and aguide pulley 61 secured to themain body 14, so as to be wound up around a winding uppulley 55 secured to the above-mentionedoutput shaft 56 of the tilting speed reducing device. The above-mentioned tiltingspeed reducing device 52 and the winding uppulley 55 compose the tilting device. Theguide pulley 60 and theguide Pulley 61 are moved by a certain distance by the tension of thewire 58, and respectively have asprings 62 and aspring 63 for returning those pulleys to the initial positions when the tension of thewire 58 disappears.Numeral 64 designates a limit switch for detecting the vertical state of the water tub which is actuated by theguide pulley 61, and numeral 65 designates a limit switch for detecting the horizontal state of the water tub.Numeral 66 designates a fan duct which forms an airflow channel from theblower 47 to theheat exchanger 48, and numeral 67 designates a heater which is arranged at the upper part of thewater tub 18B and opens a blowing-inport 68 for introducing the drying air into thewater tub 18B, and communicates with a dischargingduct 69, a dischargingduct 70, and a slidingpart 71. Theheater 67 communicates with the dischargingduct 70 through an expandable and collapsible bellows 72.Numeral 73 designates an exhaust outlet for the drying air which is opened at the bottom surface of aninner lid 20 which is provided with afilter 74.Numeral 75 designates an intake duct communicating with anintake duct 77 through a slidingpart 76; and anintake duct 77 communicates with afan intake duct 79 through an expandable and collapsible bellows 78. By this configuration, as shown in Fig.9, a circular course of the drying air from theblower 47 to theheat exchanger 48, and into thewater tub 18A and thewater tub 18B is circuited. -
Numeral 80 designates a controlling device for controlling the washingelectric motor 33, themechanical part 27, the dryingelectric motor 36, the tiltingelectric motor 49, theheater 67, etc.Numeral 81 designates a laundry detecting means which is connected to the controllingdevice 80 and, in this embodiment, utilizes the change of the capacitor terminal voltage of the washingelectric motor 33 caused by the laundry amount in case of the driving of thepulsator 26 by the washingelectric motor 33 during the washing step. That is, the water is supplied to the lower level, and thepulsator 26 is driven when the capacitor terminal voltage of the washingelectric motor 33 is measured, to judge the laundry amount. Then, the water is supplied additionally according to the laundry amount, and the washing is started. - Next, actions of an embodiment will be explained. Fig.1 shows the state of the water tub during the washing-rinsing-spinning step. During the washing-rinsing step, the
washing shaft 28 of the rotary drum is uprighted vertical to the installation surface of themain body A 14 when thepulsator 26, which is connected to thewashing shaft 28 with themechanical part 27, is rotated by the washingelectric motor 33 in predetermined forward/backward cycles. - At that time, as mentioned above, the laundry detecting means 81 judges the laundry amount. The dryable laundry amount is about a half of the washable one of the same vessel capacity; namely, if the latter is 4 kg, the former is 2 kg. Therefore, if the laundry amount is judged in excess of the predetermined limit, i.e., 2 kg, the controlling
device 80 carries out only the washing-rinsing-spinning step, and then gives notice of "the washing finished" to inform the user thereof (the first through the 5th steps of Fig.13. If the user wishes to proceed and finish the drying, he or she takes away a part of the laundry and carries out the drying. If the laundry amount is less than the predetermined limit, i.e., 2 kg, the drying step succeeding the washing-rinsing-spinning step is carried out when notice of "the drying finished" is given (the 4th step, and the 6th through 9th steps of Fig,13. Though, during the washing step, the water tub is filled with water for washing, thewater tub 18A has been fittingly secured to thewater tub 18B with the sealingmember 19, which prevents the water from leaking out, affording a very high reliability. During the spinning step, therotary drum 25 is connected to the spinningshaft 29 with themechanical part 27 and rotated at a high speed of about 800 rpm so as to dewater the laundry. During that time, the vibration of therotary drum 25 is transferred to thesuspensions 45 through thewater tub 18A and the tiltingshafts 43, to be damped there. During the washing-rinsing-spinning step, thespeed reduction gear 37 is disconnected from the dryingpulley 38 with the clutch 39. Hence, the rotation of the washingelectric motor 33 is not transferred to thespeed reduction gear 37 and the dryingelectric motor 36, whereby the drives of thepulsator 26 and therotary drum 25 are not hindered. - In case there is any probability that some water remains in the
water tub 18A as in case of carrying out the drying only, the controllingdevice 80 carries out the spinning before the tilting of the water tub when the drying step is directly started. By doing this, the laundry has been dewatered when the water tub is tilted, and no water remains in the water tub, and a very high reliability free of water leakage during the tilting is afforded. - Further, in case the remaining
water detector 23 confirms no water remaining in thewater tub 18A when proceeding to the drying step, namely when the resistance between the electrodes of the remainingwater detector 23 exceeds the predetermined limit, the water tub is tilted. Hence, in case any water remains in the water tub 18, the water tub is never tilted, affording a very high reliability. The tilting is carried out by that the tilting clutch is connected, the tilting electric motor is driven, and the winding uppulley 55 secured to theoutput shaft 56 of the tilting speed reduction gear winds up thewire 58, whereby the water tub is gradually tilted around the tiltingshafts 43. When the water tub becomes horizontal, thelimit switch 65 is actuated so as to stop the tiltingelectric motor 49. Then theguide pulley 61 is moved by the tension of thewire 58, to release thelimit switch 64. During the above-mentioned tilting, since the tiltingshafts 43 are arranged at the corner parts of themain body 14, the size of the water tub can be maximized in spite of its tilting, and the capacity of the main body can be effectively utilized. Further, since the bottom part and the upper part of thewater tub 18A and thewater tub 18B are formed in truncated-cones, they can get rid of interference with the side walls of themain body 14, and the capacity of themain body 14 can effectively be utilized, thereby to maximize the water tub capacity. Since, as shown in Fig.11 and Fig.12, thewater outlet 22 is arranged so as to be positioned at the corner part of themain body 14 in case the water tub is horizontal and theoverflow outlet 21 is arranged at the corner part of themain body 14, the orbits of thewater outlet 22 and theoverflow outlet 21 during the tilting pass through the cornering parts of themain body 14, and the capacity of themain body 14 can be effectively utilized thereby to enlarge the water tub. - Next, in the drying step, the tilting
clutch 50 is released, and theblower 36 alone is driven by the tiltingelectric motor 49. At the same time, the drying electric motor is driven, and thespeed reduction gear 37 is connected to the dryingpulley 38 with the clutch 39. The rotation speed of the dryingelectric motor 36 is decelerated to about 60 rpm by thespeed reduction gear 37, and also the torque is increased, Hence, even a small electric motor can afford a great torque, and no complicated controlling device is needed to obtain a low speed. Therotary drum 25 begins to be rotated at a predetermined speed of about 60 rpm with thebelt B 40 by the dryingelectric motor 36, so as to roll the laundry in therotary drum 25. The drying air heated by theheater 67 is blown into the water tub through the blowing-inport 68, to dry the laundry. Air which has become much humid after drying the laundry goes through theexhaust outlet 73 and via alint filter 74 to theheat exchanger 48, and is dehumidified, and thereafter returns to the blower. In this way, the air dries the laundry circuiting the course for the drying air. During this time, the cooling water for water-cooling the heat exchanger is timely supplied from the city water. - Since the
heater 67, the blowing-inport 68 for introducing the air in the water tub, and theexhaust outlet 73 are arranged at the upper part of the water tub, no water splashes theheater 67, nor does water encroach the course for the drying air, thereby offering a reliability of high safety free of electricity leakage and water leakage; and further since the air for drying is blown in therotary drum 25 instantaneously after being heated, it very efficiently dries the laundry. Next, when the drying step is finished, therotary drum 25 is stopped, the tiltingclutch 50 is connected and the tiltingelectric motor 49 reversely rotates, to unwind thewire 58 which has been wound up around the winding uppulley 65. When the water tubs 18 are uprighted vertical, the tension of thewire 58 is such reduced that theguide pulley 60 is returned to the initial position by thespring 62, to actuate thelimit switch 64, which stops the tiltingelectric motor 49. In the above-mentioned manner, a series of steps from washing to drying is carried out. - As has been described, the present invention arranges the tilting shafts at the cornering parts of the washing machine main body, whereby it can wash a certain amount of laundry without enlarging the size of the main body of the washing machine.
- Further, the present invention is that a pair of tilting shafts are arranged at the diagonal corners of the main body and a water outlet is arranged in the vicinity of the corner part of the main body; and when the water tub almost horizontalized, and arranges an overflow outlet in the vicinity of the cornering part of the main body, whereby the orbits of the water outlet and the overflow outlet during the tilting pass through the cornering parts of the main body, and the capacity of the main body can be utilized efficiently and the water tub can be made large.
- Moreover, the present invention arranges the pair of tilting shafts at the diagonal corners of the main body, and gave the water tub almost a cylindrical shape having the upper part and bottom part thereof formed almost truncated-cone, and thereby the orbit of the water tub during the tilting is made small, and the water tub can be made large.
- Further, since the present invention provides a blowing-in port and an exhaust port at the upper part of the water tub, no water splashes the heater nor does water encroach the circular air course, thereby offering a reliability of high safety free of electricity leakage and water leakage.
- Further, the present invention has a controlling device which carries out the washing-rinsing spinning step in the almost vertical state of the water tub and carries out the drying step in the almost horizontal state of the water tub and carries out the spinning step before the driving of the tilting device, whereby even when the water remains in the water tub before the tilting the water is removed by the spinning, and no water leaks during the tilting, thereby a high reliability can be offered.
- Moreover, the present invention has a laundry amount detecting means for detecting the laundry amount before the drying step and the controlling device, and stops the step to the drying by the controlling device when exceeding of the laundry amount above the predetermined limit is detected, whereby the user needs not judge before starting the washing whether he or she must carry out only the washing-rinsing-spinning step or she can continue until the drying step depending on the laundry amount, and this gives conveniences.
-
- 14
- main body A
- 18A
- water tub A
- 18B
- water tub B
- 22
- water outlet
- 25
- rotary drum
- 33
- washing electric motor
- 36
- drying electric motor
- 37
- speed reduction gear
- 39
- clutch
- 43
- tilting shaft
- 47
- blower
- 67
- heater
- 80
- controlling device
- 81
- laundry amount detecting means
Claims (5)
- A washing-drying machine comprising:
a prism-shape main body (14);
a water tub (18A, 18B),
a rotary drum (25) arranged in the water tub (18A, 18B),
a pair of tilting shafts (43) for enabling said water tub to be tilted into a substantially vertical state and a substantially horizontal state;
a tilting device (41) for tilting the water tub around the tilting shafts (43); and
a path for the drying air consisting of the rotary drum (25), a heater (67), and a blower (47);
characterized by the fact
that the water tub (18A, 18B) is formed into a substantial cylinder having the upper and bottom parts thereof formed substantially truncated-cone; and
that the pair of tilting shafts (43) is arranged at the diagonal cornering parts of the main body (14). - A washing-drying machine according to claim 1 wherein:
an upwardly opening overflow outlet (21) communicates with a water outlet (22) arranged at the outside of the water tub (18A, 18B) and at the bottom part of the water tub (18A, 18B)
the water outlet (22) is provided to be positioned in the vicinity of the corner part of the main body (14) when the water tub (18A, 18B) is substantially in horizontal state; and
the overflow outlet (21) is arranged to be positioned in the vicinity of the corner part of the main body (14) when the water tub (18A, 18B) is substantially in vertical state. - A washing-drying machine according to claim 1 comprising:
a blowing-in port (68) for introducing laundry-drying air into the water tub (18A, 18B) and an exhaust outlet (73) from the water tub (18A, 18B) at an upper opening part of the water tub. - A washing-drying machine according to claim 1 comprising:
a controlling device (80) for carrying out said washing-rinsing-spinning step in the substantially vertical state of the water tub and said drying step in the substantially horizontal state of the water tub;
wherein:
the controlling device (80) controls in a manner to carry out the spinning actions before the driving of the tilting device (41). - A washing-drying machine according to claim 1 comprising:
a controlling device (80) for carrying out the washing-rinsing-spinning step in the substantially vertical state of the water tub and the drying step in the substantially horizontal state of the water tub; and
a laundry amount detecting means (81) for detecting the laundry amount before the drying step;
wherein:
the controlling device (80) stops the transfer to the drying step when exceeding of a laundry amount above a predetermined limit is detected.
Applications Claiming Priority (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63152628A JP2650722B2 (en) | 1988-06-20 | 1988-06-20 | Washing and drying machine |
JP152628/88 | 1988-06-20 | ||
JP63244913A JP2658268B2 (en) | 1988-09-29 | 1988-09-29 | Washing and drying machine |
JP244913/88 | 1988-09-29 | ||
JP63296468A JPH02142596A (en) | 1988-11-24 | 1988-11-24 | Washing and drying machine |
JP296468/88 | 1988-11-24 | ||
JP1062450A JP2666459B2 (en) | 1989-03-15 | 1989-03-15 | Washing and drying machine |
JP162450/89 | 1989-03-15 | ||
JP162448/89 | 1989-03-15 | ||
JP1062448A JPH02241488A (en) | 1989-03-15 | 1989-03-15 | Washer drier |
PCT/JP1989/000598 WO1989012711A1 (en) | 1988-06-20 | 1989-06-15 | Washing and drying machine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0381765A1 EP0381765A1 (en) | 1990-08-16 |
EP0381765A4 EP0381765A4 (en) | 1990-10-10 |
EP0381765B1 true EP0381765B1 (en) | 1994-03-09 |
Family
ID=27550887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89907274A Expired - Lifetime EP0381765B1 (en) | 1988-06-20 | 1989-06-15 | Washing and drying machine |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0381765B1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04272792A (en) * | 1991-02-28 | 1992-09-29 | Hitachi Ltd | Washing and drying machine |
CZ179692A3 (en) * | 1992-06-12 | 1993-12-15 | Tefo Svenska Textilforskningsi | Method of determining relaxation and contracting properties of textiles and textile articles, and apparatus for making the same |
KR950005179Y1 (en) * | 1992-12-21 | 1995-06-26 | 구자홍 | Dehydration control apparatus |
JPH09313766A (en) * | 1996-01-31 | 1997-12-09 | Sharp Corp | Drum type drying/washing mace, drum type drier, and operating method for drum type drying/washing machine |
KR101672079B1 (en) * | 2013-12-20 | 2016-11-02 | 동부대우전자 주식회사 | Drum tyme washing machine |
CN114754478B (en) * | 2022-04-29 | 2022-12-20 | 南通东帝纺织品有限公司 | Automatic temperature and humidity control system for textile mill |
-
1989
- 1989-06-15 EP EP89907274A patent/EP0381765B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0381765A1 (en) | 1990-08-16 |
EP0381765A4 (en) | 1990-10-10 |
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