baber/WOPTO huggingface dataset:
Patent KR-20000007283-A (KR)
Title: Capacitor device with variable capacitance
Inventor: KIM KYEONG UK
IPC: H01G7/00
Filed: 1998-07-02
Abstract: PURPOSE: A capacitor device is provided to improve capacitance change of the capacitor. CONSTITUTION: A capacitor device comprises a first capacitor coupled between a first connecting terminal and a second connecting terminal, a second capacitor coupled between the first connecting terminal and a first control voltage terminal, one or more variable capacity diode coupled between the first control voltage terminal and a second control voltage terminal, and a third capacitor coupled between the second control voltage terminal and the second connecting terminal. The capacitor device is capable of used usefully in an RF block of a multiple frequency band wireless communication device.
Patent KR-20000007603-A (KR)
Title: Sustained driving apparatus with low power consumption
Inventor: MUN SUNG HAK
IPC: G09G3/00
Filed: 1998-07-04
Abstract: PURPOSE: Sustained driving device is to be provided which uses the least electricity on plasma display panel, which consumes up much electricity. CONSTITUTION: The device has the first and the second electrodes on the display panel, and supplies a voltage of at least 2 states for the electrodes. The device has the first and the second power supply which provide power for a recharger and the sustained electrode, the first switch which controls signal pass for recharging by being connected between the sustained electrode and a ground point, the second switch which controls signal pass for discharging by being connected between the sustained electrode and a ground point, and the third switch which controls signal pass for recharging and discharging by being connected between the sustained electrode and a ground point. The second power supply provides lower sustain voltage than the first power supply, reducing the consuming of power by providing power in two steps to the sustained electrode.
Patent KR-20000009585-A (KR)
Title: Inverter type power supply
Inventor: PARK YOUNG
IPC: H02M7/48
Filed: 1998-07-27
Abstract: PURPOSE: An inverter type power supply is provided to supply power stably to an operation power of an electric or electronic device, to make a transformer core as a radiant panel of a switching element, and to reduce production cost by using a switching element of low price. CONSTITUTION: An inverter type power supply includes; a high voltage transformer T3 for outputting high voltage of predetermined level to supply operation power to an electronic or electric device generator; a rectifying section (REC) for rectifying AC input voltage (AC 110/220V) to DC voltage of a predetermined level; a pair of switching sections (T1,2, Q1,2, R13-16) for switching the voltage supplied from the rectifying section (REC) to frequency of a predetermined level; a pair of transistor (TR1,2) for transmitting a switching signal to a pair of switching sections; and a pulse width modulator (PWM, R1-11, C1,2,6) for outputting the switching signal necessary for switching operation.
Patent KR-20000010145-A (KR)
Title: Pre-engaged recording device of a digital broadcasting system and a pre-engaged recording method thereof
Inventor: KO JAE YOUNG
IPC: H04N21/472
Filed: 1998-07-30
Abstract: PURPOSE: A pre-engaged recording device is provided to allow viewers see the brief description of the recorded program, search programs easily and manage the recorded VCR tape in which variety of programs are recorded easily by adding index to the each of the recorded program. CONSTITUTION: The device of a digital broadcasting system and a pre-engaged recording method thereof comprises a digital broadcasting receiver which transmits the video or audio signal of the pre-engaged program, which transmits the intelligent information registered at the pre-engaged program list before the pre-engaged time and a record revival device(200) which records the audio or video signal received from the digital broadcasting receiver(100) at the recorder after recording the intelligent information.
Patent KR-20000014995-A (KR)
Title: Method for checking calling path of switching system
Inventor: LEE CHOONG-WAN
IPC: H04M3/22
Filed: 1998-08-26
Abstract: PURPOSE: A method for checking a calling path of a switching system capable of checking the calling path when something is with a calling path is provided. CONSTITUTION: A method for checking a calling path of a switching system, the method comprising the steps of: inserting a predetermined packet into a pattern insertion part in which a calling path is required, the predetermined packet including a check method, a board or loop path to be checked, and a pattern extracting location; transmitting the predetermined packet through the calling path; looping through the looping path having the predetermined packet when the checking method of the predetermined packet is a looping method; extracting the predetermined packet looped by the looping method or the predetermined packet transmitted by a single path method from the pattern extracting location having the predetermined packet; and checking a desired path through the extracted packet.
Patent KR-20000019341-A (KR)
Title: Experimental slip ring
Inventor: YUN JU WOON
IPC: G01M99/00
Filed: 1998-09-10
Abstract: PURPOSE: An experimental slip ring is provided to prevent a result data error occurring by a friction loss due to a slip ring when measuring a rotating body. CONSTITUTION: An experimental slip ring comprises: an auxiliary driving motor(20) mounted on a side of a slip ring(10) for a torque due to a friction of a brush(11) and a rotor shaft(12) not to have an influence on a measured object, wherein the driving motor(20) is supplied with electric power from an electric power supply part(30) and the driving motor(20) includes a coil(21) and a permanent magnets(22), to thereby obtain an exact experiment data.
Patent KR-20000019444-A (KR)
Title: Inchworm type motor
Inventor: KIM SU HYEON
IPC: H02N1/00
Filed: 1998-09-11
Abstract: PURPOSE: An inchworm type motor is provided to unify a power source for clamping a rotational body and a power source for rotating the rotational body into one. CONSTITUTION: An inchworm type motor comprises a cylindrical rotor(13) which is rotatable mounted with a fixed shaft(12) in the center, a belt(21,22) which is disposed so as to enclose around an outer circumference of the rotor and closely contacted with or apart from the outer circumference, and a pair of extendable actuators which are respectively provided on each end of the belt so as to linearly move the ends of the belt. The extendable actuators are simultaneously extended so that the belt is closely contacted with the rotor. In the state that the belt is closely contacted with the rotor, one of the actuators is further extended and the other is contracted so that the rotor is rotated. Thereby, since each power source for clamping and rotating the rotor is unified, a number of parts is decreased.
Patent KR-19980087811-A (KR)
Title: 자동차용 자동속도 조절장치
Filed: 1998-09-22
Abstract: 본 발명은 자동차의 자동속도 조절장치에 관한 것으로서 모터가 내장되는 케이스가 구비되고 볼트형태의 나사산이 만들어진 모터축이 형성되며, 볼트 회전축이 회전시 당겨지는 너트형태의 너트 회전축이 있으며 , 너트 회전축 양쪽에는 너트 회전축만이 회전하면서 당길수 있도록 연결축과 두개의 회전 방지축이 형성되고 회전 방지축을 지지해주는 구멍 두 개가 모터 케이스 중심부를 중심으로 상하에 뚫려 있으며 회전 방지축 끝부분에 가속케이블의 마찰을 줄이여 당길수 있도록 롤러축이 형성됨으로써 모터의 작동에 의해 주행중 운전자가 자동 속도조절장치를 사용하여 발로서 가속페달을 밟지않고도 운전을 할수 있도록 만들어진 장치이고 장시간 운전중 계속해서 발로 가속페달을 작동해야하는 불편함을 해소하여 발의 피로를 덜어줄수 있는 장치이다.
Patent KR-19990036678-A (KR)
Title: 고속의 가스 흡수속도를 갖는 게터펌프
IPC: H01J7/18
Filed: 1998-09-25
Abstract: 게터펌프(10)가 기술되어 있는데, 상기 게터펌프의 원통형 챔버(12)내측에는 서로 평행하고 상기 챔버축선에 평행한 3개 내지 8개의 게터 구조물(13,13', ...)이 있으며, 상기 각각의 구조물은 중앙 지지대(15,15', ...)에 의해 지지된 게터재료의 디스크(14,14', ...)로 형성되어 있다.  게터소자는 펌프축선 주위에 대칭으로 배열되어 있으며 게터재료의 활성화 및 작동에 필요한 히터부재(16)가 내장된 중앙공동을 형성하고 있다.  이러한 펌프는 유사한 칫수의 게터펌프에 비해 고속의 흡수속도를 가진다.
Patent KR-20000021606-A (KR)
Title: Method for manufacturing indicating board of fishing vessel
Inventor: JIN YOUNG JOO
IPC: G09F7/00
Filed: 1998-09-30
Abstract: PURPOSE: A method for manufacturing indicating board of fishing vessel is provided to discriminate an other fishing vessel after being used in a long time by both not occurring a corrosion of a plane board and not removing an indicating unit number. CONSTITUTION: A unevenness(3) is formed on a surface of a plane board(1). A coating film(2) is coated on the unevenness(3). A number is indicated on the coating film(2). The unevenness(3) is formed on one side of the plane board(1) using a sand paper, a file, and a scraper. The unevenness(3) is formed by a friction force and a sand and the plane board(1). An indicating unit such as a sign or a number is formed on a upper surface of the coating film(2) for being discriminated with other fishing vessel.
Patent KR-19990037110-A (KR)
Title: 회전 기계용의 브러시/래버린스 혼합형 시일
IPC: F16J15/447
Filed: 1998-10-15
Abstract: 회전 기계용 래버린스 브러시 혼합형 시일은 복수 개의 축 방향으로 간격을 두고 있으면서, 원주 방향 및 반경 방향으로 연장되는 경사진 시일 치상 돌기를 구비하는 축 방향 크기가 미리 결정된 원호형 세그먼트와, 상기 세그먼트를 따라 예정된 축 방향 위치에서 세그먼트에 의해 지지되며, 상기 치상 돌기의 반경 방향 크기를 초과하여 돌출하는 불연속적인 강모로 된 하나 이상의 원주 방향으로 연장되는 어레이를 포함하며, 상기 강모는 세그먼트의 슬롯 내에 활주 가능하면서 제거 가능하게 수납된 긴 가요성 캐리어 스트립을 구비한다.
Patent KR-19990037164-A (KR)
Title: 반사형 액정 표시 장치
IPC: G02F1/1343
Filed: 1998-10-16
Abstract: 본 발명의 반사형 액정 표시 장치는, 그 사이에 액정층을 샌드위치(sandwich)한 한 쌍의 기판; 상기 기판 쌍 중 하나의 기판 상에 형성된 델타 배열(delta arrangement)을 갖는 복수의 화소 전극; 상기 기판 쌍 중 하나의 기판 상에 형성되며, 굴곡부를 구비한 복수의 신호선; 상기 기판 쌍 중 하나의 기판 상에 형성되는 복수의 주사선 - 상기 주사선 및 상기 신호선은 서로 교차하도록 상기 복수의 화소 전극의 주변부들을 따라 연장하여 형성됨 - ; 및 상기 복수의 신호선에 전기적으로 접속되며 상기 화소 전극의 전위를 제어하기 위한 복수의 박막 트랜지스터를 포함하며, 상기 복수의 박막 트랜지스터 중 최소한 하나의 박막 트랜지스터는 상기 복수의 신호선 중 2개의 인접 신호선들 사이의 거리가 상기 2개의 인접 신호선 중 최소한 하나의 신호선의 굴곡부에 의해 감소된 위치에 형성된다.
Patent KR-19990037230-A (KR)
Title: 일액형 소부 조성물 및 그의 용도
IPC: C08G18/48
Filed: 1998-10-20
Abstract: 본 발명은 휘발성 화합물의 방출 없이 낮은 온도에서 베이킹 될 수 있고, 또한 실온 저장시 안정성이 만족스러운 신규 일액형 소부 조성물에 관한 것이다.  본 발명은 또한 일액형 소부 조성물의 용도에 관한 것이다.
Patent KR-20000027079-A (KR)
Title: Magnetic particle type electric connection unit
Inventor: NA JONG KAP
IPC: F16D37/02
Filed: 1998-10-26
Abstract: PURPOSE: An electric connection unit is provided to smoothly change the transfer rotary force corresponding to the change in a specific range of excitation currents as well as to extend the control range of the transfer rotary force at the maximum. CONSTITUTION: An electric connection unit is constituted of: an annular magnetic driving substance(3) fixed to supporting plates(8,12) on an input axis(4) to be integrated with the axis; a magnetic driven substance(10) having its outer circumference arranged against the inner circumference of the driving substance with a fine space; a magnetic particle(15) filling the fine space; an electromagnet unit(1) having an excitation coil(7), connected with brackets(6,19) to be supported to the input axis and an output axis(18) through bearings(13,19); the driven substance integrated with the output axis through a connecting member(5); and the bracket(6) and the connecting member(5) formed as a non-magnetic substance. The magnetic particle is magnetized if the magnetic force is communicated to the excitation coil as the driving substance is revolved by the axis. The driven substance is connected to the driving substance through the magnetic particle to transfer the rotary force of the driving substance and the currents flowing in the excitation coil controls the transfer rotary force.
Patent KR-20000027327-A (KR)
Title: Fabric for air bag
Inventor: KIM KWANG O
IPC: D03D25/00
Filed: 1998-10-28
Abstract: PURPOSE: A fabric for an air bag is provided to safely protect a passenger by having the excellent tearing strength, and to easily be stored inside a module by having the excellent flexibility and foldability. CONSTITUTION: A filament of synthetic fiber having the fineness of 500-600deniers as a weft and a warp is used when a fabric for an air bag is woven. The filament of synthetic fiber is used as a polyamide 6, a polyamide 66, a polyamide 46 or a polyester filament and so on. A weaving density is 45strand/inch every the weft and the warp. The fabric for the air bag is the tearing strength over 15kg toward the weft direction and the warp direction, and the thickness of the fabric is under 0.35mm. Thereby the storage capacity inside a module is improved by having the excellent flexibility.
Patent KR-20000028342-A (KR)
Title: Method of controlling to prevent chattering when switching to warm water in heating of gas boiler
Inventor: KIM CHANG YEON
IPC: F24H9/20
Filed: 1998-10-31
Abstract: PURPOSE: A method is provided to analyze the output according to the time when switching to heating from heating water, to prevent the chattering by deciding the area of output per every unit time and to decide the heating or heating water stoppage promptly. CONSTITUTION: A gas boiler for both hot water supply and heating has a water flow switch turned off according to the turn-off of a hot water tap after turning on a driving switch. The output according to the time is decided based on the ratio of the unit time to the output area. A three-way valve is switched to a heating portion if a certain output area is wider than the whole output area. Then, the output is sensed continuously if the certain output area is narrower than the whole output area. The answer signals are generated to confirm the switching of the three-way valve. If the response is not confirmed, the mode is an error mode.
Patent KR-19990007766-A (KR)
Title: 캡슐형 화장실의 성형방법 및 그 물건
IPC: B28B1/02
Filed: 1998-10-31
Abstract: 본 발명은 캡슐형화장실의 성형방법 및 그 물건에 관한 것으로, 콘크리트 성형물에 내장하기 위해 적어도 하나이상의 보강물을 종횡으로 겹쳐 짜여서 균열을 예방하기 위한 보강부재를 얻고, 보강부재의 외부를 감싸면서 내부로는 공간부가 허용될 수 있도록 적어도 하나이상의 성형판을 조립하고, 상기 성형판이 회전할 수 있는 회전장치와 성형판의 내부에 배치하는 보강부재에 콘크리트를 공급하여 도포하는 콘베이어를 설치하여 성형판으로 콘크리트를 공급하여 콘크리트로 축조된 본체를 얻어, 상기 본체의 상부에 배치되는 상판과, 상기 본체와 상판을 체결수단으로 고정하며, 상기 체결수단에 설치되어 본체와 상판 사이를 이격시키는 간격유지수단과 상기 체결수단과 결합하여 본체와 결합된 상판을 운반하는 운반수단으로 이루어, 간소하고 편리한 성형과정으로도 안전하고 견고한 본체를 성형하며 신속하고 간단한 조립공정을 이루게 하면서 운반과 취급이 편리하고도 안전하게 이루어져 경제적인 화장실 설치와 위생적이고도 청결한 사용을 이루는 캡슐형화장실의 성형방법 및 그 물건.
Patent KR-20000030986-A (KR)
Title: Container for enclosing kimchi
Inventor: CHOE CHONG WON
IPC: A47J47/02
Filed: 1998-11-02
Abstract: PURPOSE: A container for enclosing Kimchi is provided for controlling the amount of gas resulted from fermentation of Kimchi and enhancing the long term storing with freshing the contents due to additional inner container which present the distant-IR radiation effect, while enhancing convenience, promoting sealing, and keeping cooling effect. CONSTITUTION: The Container for enclosing Kimchi is made of foamed insulating material,and comprises: a container body, a cover element which may be engaged by a hinge and clamping element, and an inner container, in which an opening is formed through cover element for controlling the amount of gas in container, an ice pack receiving port is formed beneath the cover, and EVA sealing ring is provided around the circumference beneath the cover element.
Patent KR-20000028525-A (KR)
Title: Biological treatment method of wastewater including dextrine
Inventor: KIM HYUN SOO
IPC: C02F3/34
Filed: 1998-10-31
Abstract: PURPOSE: A treatment method of waste water including dextrine component is provided, which is characterized in that microorganism group, Entrobacter sp. CJ-A01, which grow well in aerobic condition and has activity of amylase enzyme, is used for biological treatment process. CONSTITUTION: To select a specific microorganism group which can disintegrate source of organic matters like dextrine, cellulose, fat, and protein, the most appropriate microorganism group is necessary. Water and soil from waste water from plants for disposing industrial waste water are collected, and the microorganism samples are collected from the water and soil. Collected microorganisms are cultivated in specific culture ground which has activity of amylase in aerobic condition. Then, specific microorganism group which has function for removing BOD from waste water including dextrine component are selected as Entrobacter sp. CJ-A01.
Patent KR-20000031072-A (KR)
Title: Optical connector module
Inventor: KIM BEOM SU
IPC: G02B6/24
Filed: 1998-11-03
Abstract: PURPOSE: An optical connector module is provided to easily align an optical element and an optical fiber and reduce costs. CONSTITUTION: An optical connector module comprises first and second holders(20,30), a coupler and a guider. An optical element(23) and an optical fiber(33) are respectively mounted in the first and second holders(20,30). The holders(20,30) are coupled each other to be a package by the coupler. The guider aligns the optical element(23) and the optical fiber(33) in their positions in coupling the holders(20,30). The coupler is coupled to one of the holders(20,30) by a hinge shaft and comprises a clamp(41) having an engage step(42) formed on one end, an elastic member(44) applying rotation force to the clamp(41), and an engage groove(45) engaged with the step(42).
Patent KR-20000031736-A (KR)
Title: Alpinia katsumadai extract having anti-cancer activity
Inventor: YUN SEONG JUN
IPC: A61K31/352
Filed: 1998-11-10
Abstract: PURPOSE: An Alpinia katsumadai extract having anti-cancer activity is provided which contains 7,8-dihydroxyflavanone. CONSTITUTION: 7,8-dihydroxyflavanone inhibits the formation of Jun-Pos dimmer or the binding of Jun-Pos dimmer to DNA, so that it prevents the growth of cancer cells. The Alpinia katsumadai extract is obtained by organic solvent such as ether, benzene, methanol, ethanol, butanol, chloroform, methylene chloride, ethyl acetate, and hexane. 7,8-dihydroxyflavanone is purified by the following steps of: 1)the extraction of Alpinia katsumadai with ether and benzene; 2)the application of the Alpinia katsumadai extract to silica gel chromatography using mixture of hexane and ethyl acetate(9: 1, 4: 1, 2: 1); 3)the crystallization of the 23rd fraction out of 60 fractions.
Patent KR-19990045169-A (KR)
Title: 박막작성장치
IPC: C23C16/48
Filed: 1998-11-10
Abstract: 처리챔버 내의 노출부위 상에서의 박막의 퇴적을 억제하고 양질의 박막을 높은 생산성으로 선택성장처리할 수 있도록 한다. 
     처리챔버(1) 내에서 히터(4)에 의해서 가열된 기판(9)에 디실란가스가 도입되고, 열CVD에 의해서 기판(9)의 실리콘표면에만 실리콘막이 퇴적된다. 기판(9)으로부터의 복사열을 반사시켜 되돌리도록 처리챔버(1) 내에 설치된 열반사판(6)은, 실리콘제이고 표면에 실리콘산화막(61)이 형성되어 있다, 실리콘산화막(61)의 표면에는 디실란의 분해에 의해서 실리콘원자가 석출부착되지만, 각 기판(9)을 막형성처리하는 사이에 산소가스를 도입한 개질조작이 행해져, Si-Si 결합이 이루어지지 않는 고립상태의 Si 원자가 산화실리콘으로 바뀌어진다. 따라서, 열반사판(6)의 표면은 항상 선택성장의 조건이 유지되어 실리콘막의 퇴적이 억제된다.
Patent KR-20000034008-A (KR)
Title: Fet predistorter without insertion loss
Inventor: KANG SANG KI
IPC: H03F1/32
Filed: 1998-11-26
Abstract: PURPOSE: An FET pre distorter without insertion loss is provided to acquire profits directly without using additional amplifier like buffer amplifier or additional circuits like terminal electric power amplifier to increase gain. CONSTITUTION: A matching circuit(310) insulates direct current inputted through wireless frequency and provides match for alternate current signal. FET(340) amplifies and outputs signals from the above matching circuit. A feedback circuit(350) is connected to FET source and provides the above FET(340) with feedback current, thereby capable of pre distorting recorded output signals of FET beyond a specific value. A matching circuit(320) is connected to the drain of the above FET(340) and matches with the connected outside circuits. A reference supply(330) is connected to the drain of the above FET(340) and supplies the reference voltage.
Patent KR-20000034121-A (KR)
Title: One door system for blowing conversion of vehicle air conditioner
Inventor: HAN SUNG SUK
IPC: B60H1/00
Filed: 1998-11-27
Abstract: PURPOSE: An one door system for blowing conversion of vehicle air conditioner is provided to simplify the assembly of the door assembly by providing a single revolving door which is formed cylindrically and selectively blowing air from the main duct to a branch duct. CONSTITUTION: An one door system for blowing conversion of vehicle air conditioner for blowing through a plurality of multi-divided branch ducts(10,11,12) connected to a ventilator, a defroster, and a floor duct from a main duct(3), includes a revolving door(20) mounted between the branch ducts and the main duct and opened at least two parts for selectively connecting at least one branch duct to the main duct by revolving with reference to a rotation shaft, and a driving element for rotating the rotary type door, wherein the rotary type door is preferably formed in the shape of cylinder and the driving element includes a circular gear connected to the rotation shaft of the rotary type door, and a connecting element for mechanically connecting the cylindrical revolving door to a blowing conversion lever.
Patent KR-20000041804-A (KR)
Title: Joint connector
Inventor: PARK TAE HYEONG
IPC: H01R24/00
Filed: 1998-12-23
Abstract: PURPOSE: A joint connector is provided to adjusts the electrical wiring of the joint connector to one-line and two-line types. CONSTITUTION: A joint connector includes a male connector(100), a female connector, and a switch(104). The male connector(100) and the female connector are provided in order to wire an electrical circuit by inserting to each other's side. Each of the male connector(100) and the female connector includes switch(104). The switch is provided to adjust the electrical wiring of the joint connector to one-line and two-line types. The switch further includes a pair of touching slices, a guide hole, and a switching member. The pair of touching slices touches a pair of pins of the pins of each of the male connector(100) and the female connector. The guide hole is formed on one side of each of the male connector(100) and the female connector. The switching member is inserted in the touch surface of the pair of touching slices and blocks the electrical connection of the pair of touching slices.
Patent KR-20000043497-A (KR)
Title: Method for an electrolytic capacitor
Inventor: KIM JAE GEUN
IPC: H01G9/00
Filed: 1998-12-29
Abstract: PURPOSE: A method for an electrolytic capacitor is provided to manufacture an electrolytic capacitor of a large capacitance by forming an electric double layer with the use of conducting polymer. CONSTITUTION: An electrode-activating material having active carbon as a main component is coated on a Nickel mesh. The coated Nickel mesh is electrolytically polymerized on a monomer solution of the conducting polymer to produce a new conducting polymer in pores. A capacitance by the electric double layer of the active carbon and a pseudo capacitance using the redox of the conducting polymer are used. Polypyrrole, polyaniline, or polyacene are used as the conducting polymer, to thereby manufacture an electrolytic capacitor of a large capacitance.
Patent KR-20000044720-A (KR)
Title: Method for supplying filling water of gas boiler
Inventor: MIN CHUN HEE
IPC: F24H9/20
Filed: 1998-12-30
Abstract: PURPOSE: A method for supplying filling water of a gas boiler is provided to stop an operation to supply filling water and to inform a suspension of water supply to a user when filling water is not supplied by the suspension of water supply. CONSTITUTION: When a low water level of a water tank is detected, a count of a counter to count an operating number of operations for supplying filling water is increased and a circulating pump is turned off. Filling water is supplied to the water tank by driving a valve of filling water. When a supply of filling water is not checked through an electrode, the operation for supplying the filling water is repeated until three times. When the supply of filling water is not checked after three times, the operation is stopped and a suspension of water supply is informed to a user. Thereby an unnecessary power consumption generated by repeatedly turning on/off the valve of filling water is prevented and a damage of the filling water valve is prevented.