baber/WOPTO huggingface dataset:
Patent IT-1249941-B (IT)
Title: Roller for the removal of down and method for its fabrication
Inventor: MCKAY NICHOLAS D
IPC: A47L/
Filed: 1991-06-28
Granted: 1995-03-30
Abstract: An assembly for the removal of down is described, provided with a handle having a roller for the removal of down, which is able to receive a roll of press-type adhesive tape having layers of adhesive tape with the glue surface facing the outside, so that the roll of adhesive tape can be selectively made to travel over a surface in order to selectively lift the down and/or other foreign particles. <IMAGE>
Patent IT-1270408-B (IT)
Title: Unita' per il posizionamento di matrici flessibili su un cilindro di stampa, e macchina per prove di stampa incorporante tale unita'
Inventor: GINO GIORGIO
IPC: B41M/
Filed: 1993-06-01
Granted: 1997-05-05
Abstract: Unità per il posizionamento di matrici flessibili (7) su un cilindro di stampa (6) in una macchina (1) per prove di stampa, comprendente una guida rettilinea (24) sulla quale sono montati scorrevoli degli elementi di posizionamento (26) a spina (28) atti a cooperare con rispettivi fori di registro (16) ricavati sulle matrici (7); la guida (24) è sopportata alle proprie estremità in modo girevole da staffe (17) atte ad essere fissate ad un dispositivo (8) di posizionamento ottico delle matrici (7) stesse.(Figure 1, 2)
Patent IT-1247062-B (IT)
Title: Method of measuring the amount of liquid absorbed and device thus produced, especially for use in nappies
Inventor: BETTIOL CARLO ALBERTO
IPC: A61F/
Filed: 1991-06-10
Granted: 1994-12-12
Abstract: Method of measuring the amount of liquid absorbed and device thus produced, especially for use in nappies, consisting of the fact that a sensor means is associated with the nappy in order to detect an increase in the amount of moisture present, this means essentially consisting of two electrodes which work in conjunction with a comparison circuit which, once a predetermined threshold value has been reached, activates a timed audible and/or visual alarm, and/or sends a coded signal via a transmission means which activates a remote alarm. <IMAGE>
Patent IT-1258594-B (IT)
Title: Levigatrice-lucidatrice per superfici cilindriche
IPC: B24B21/02
Filed: 1992-06-24
Granted: 1996-02-27
Abstract: Secondo l'invenzione si realizza una levigatrice-lucidatrice per superfici cilindriche comprendente un basamento (2) sul quale insiste almeno una colonna montante (3), alla quale sono collegati un gruppo di levigatura (6) composto da un nastro abrasivo (50) avvolto tra una coppia di tamburi (21) ed un gruppo di pressione (5) del nastro abrasivo (50) contro la superficie cilindrica (20) da lavorare.Detto gruppo di pressione (5) è composto da un carter (14) che supporta una pluralità di rulli cilindrici folli (7), allineati tra loro e collegati ad un cinematismo (62) di avanzamento atto a spostarli in direzione parallela all'asse della superficie cilindrica (20) da lavorare lungo una sua generatrice (57), ove detti rulli cilindrici (7), in fase di lavorazione, premono sul dorso (60) del nastro abrasivo (50), quest'ultimo reso mobile orizzontalmente secondo la generatrice (57) di contatto con la superficie cilindrica (20) in lavorazione dalla rotazione dei tamburi (21) tra i quali è avvolto.
Patent IT-1270768-B (IT)
Title: Equipment for the orbital electric welding of joints in fixed steel pipes by means of coated metal electrodes performed with automatic programming
Inventor: FRACAROLI FLAMINIO
IPC: B23K/
Filed: 1993-05-04
Granted: 1997-05-07
Abstract: This relates to equipment for the electrical welding of joints in metal piping which convey gases or liquids under pressure using coated metal electrodes. This equipment carries out the welding in one or more passes, automatically and continuously around the circumference of the joint which has to be welded, that is without interruptions and intermediate restarts, in accordance with a predetermined programme. The welding system is orbital. The pipes which have to be welded remain fixed while the equipment to which the patent relates rotates around them. The equipment designed for welding using electrodes essentially comprises a guide unit and a corresponding number of cursors which are each driven by their own electronically controlled electric motor through corresponding endless screws which bring about gradual and controlled advance of the linear electrodes towards the welding point. <IMAGE>
Patent MX-166863-B (MX)
Inventor: GOULDING JOHN
IPC: C02F5/12
Filed: 1985-01-16
Abstract: Water treatment, e.g. antiscaling, polymer compositions are marked or labelled with activated groups which are attached to the polymer chain backbone by carbon-carbon bonds. These activated groups are subjected to colour forming reactions, e.g. by reaction with a diazonium aromatic compound, thus enabling the polymers to be detected at very low concentrations in water.
Patent PT-101038-B (PT)
Inventor: COUSINS RUSSELL DONOVAN
IPC: C12N7/00
Filed: 1992-11-05
Abstract: Novel indane and indene derivatives are described which are endothelin receptor antagonists.
Patent PT-104165-B (PT)
Title: Actuador linear simultâneo de relutância magnética
Inventor: MARTINS PAULO ANTONIO FIRME
IPC: F41B6/00
Filed: 2008-09-03
Abstract: A PRESENTE INVENÇÃO CONSISTE NUM ACTUADOR LINEAR DE RELUTÂNCIA MAGNÉTICA, O QUAL É ACCIONADO PELA INTERACÇÃO ENTRE UM CAMPO ELECTROMAGNÉTICO CRIADO PELA PASSAGEM DE CORRENTE ELÉCTRICA EM BOBINES ADEQUADAS E UM CONJUNTO DE NÚCLEOS EM MATERIAL FERROMAGNÉTICO. O ACTUADOR TEM A PARTICULARIDADE DE TER MONTADO AO LONGO DO SEU COMPRIMENTO VÁRIOS NÚCLEOS INDEPENDENTES, DISPOSTOS DE FORMA ADEQUADA PARA GARANTIR O SINCRONISMO COM AS BOBINES. A ACTIVAÇÃO CONTROLADA DAS BOBINES PERMITE SOLICITAR OS NÚCLEOS, ATRAVÉS DE UMA FORÇA DE ORIGEM ELECTROMAGNÉTICA, ANIMANDO A BARRA ACTUADORA COM UMA ACELERAÇÃO ADEQUADA. QUANDO A ACTIVAÇÃO DAS BOBINES É REALIZADA SIMULTANEAMENTE, E O POSICIONAMENTO RELATIVO ENTRE NÚCLEOS E BOBINES ESTÁ SÍNCRONO E EM FASE, É POSSÍVEL ATINGIR ACELERAÇÕES MUITO SUPERIORES AQUELAS QUE SE CONSEGUEM COM OS ACTUADORES SINGULARES COM O MESMO DIÂMETRO DE BOBINA E NÚCLEO. ESTA SITUAÇÃO DEVE-SE A UMA MELHORIA SIGNIFICATIVA NA TRANSFERÊNCIA DE ENERGIA ELECTROMAGNÉTICA PARA CINÉTICA DEVIDO AO AUMENTO RELATIVO DA SUPERFÍCIE ATRAVÉS DA QUAL É REALIZADA A TRANSFERÊNCIA DE ENERGIA PELOS PRINCÍPIOS BÁSICOS DA TEORIA DO ELECTROMAGNETISMO. ESTE ACTUADOR APRESENTA AINDA UMA ESTRUTURA DO TIPO MODULAR, PERMITINDO ADEQUAR FACILMENTE O SEU FUNCIONAMENTO EM FUNÇÃO DOS REQUISITOS DE FORÇA DE ACTUAÇÃO E CONTROLO DE POSIÇÃO. ESTE SISTEMA CONSISTE NUM CONJUNTO DE NÚCLEOS FERROMAGNÉTICOS (10) MONTADOS NUMA BARRA ACTUADORA (9) ACTUADOS POR INTERMÉDIO DAS FORÇAS MAGNÉTICAS RESULTANTES DAS DESCARGAS ELÉCTRICAS EFECTUADAS NAS BOBINAS (4) CORRESPONDENTES A CADA UM DOS NÚCLEOS.
Patent PT-115469-B (PT)
Title: Ligante para composições de moldagem por injeção
Inventor: DAMIEN CARTIER
IPC: C04B35/634
Filed: 2019-04-23
Abstract: A INVENÇÃO TAMBÉM SE REFERE A UM LIGANTE PARA COMPOSIÇÕES DE MOLDAGEM POR INJEÇÃO INCLUINDO: - DE 40 A 55 POR CENTO EM VOLUME DE UMA BASE POLIMÉRICA, - DE 35 A 45% EM VOLUME DE UMA MISTURA DE CERAS OU DE UMA MISTURA DE CERA E ÓLEO DE PALMA, - E, PELO MENOS, 5 POR CENTO EM VOLUME DE, PELO MENOS, UM AGENTE TENSIOATIVO, CARACTERIZADO POR A BASE POLIMÉRICA SER FORMADA POR COPOLÍMEROS DE ETILENO E DE ÁCIDO METACRÍLICO OU ACRÍLICO, COPOLÍMEROS DE ETILENO E PROPILENO E OU POLIPROPILENO ENXERTADO COM ANIDRIDO MALEICO, E POLÍMEROS SOLÚVEIS EM ÁLCOOL ISOPROPÍLICO, ÁLCOOL PROPÍLICO E/OU TEREBINTINA, E ESCOLHIDOS DO GRUPO QUE INCLUI UM BUTIRATO DE ACETATO DE CELULOSE, UM BUTIRAL DE POLIVINILO E UMA COPOLIAMIDA, SENDO AS RESPETIVAS QUANTIDADES DOS COMPONENTES LIGANTES TAIS QUE A SUA SOMA É IGUAL A 100 POR CENTO EM VOLUME DO LIGANTE.
Patent TW-199896-B (TW)
IPC: C07F9/6561
Filed: 1991-06-28
Granted: 1993-02-11
Abstract: This invention relates to novel purine nucleoside phosphorylase inhibitors, to the methods and intermediates for their preparation and to their use as immunosuppressants, antilymphoma, antileukemic, antiviral and antiprotozoal agents.
Patent TW-221469-B (TW)
IPC: D05C17/02
Filed: 1992-05-21
Granted: 1994-03-01
Abstract: The invention relates to a tufted carpet which comprises a tufting material, a pile material and a carpet backing and essentially exclusively comprises nylon 6. The use of a chemically uniform material in all components of the tufted carpet allows the entire carpet to be recycled for recovery of the monomer starting material without separation into the individual components being necessary, which has hitherto prevented the recycling of tufted carpets and has resulted in considerable waste disposal problems.
Patent TW-329425-B (TW)
Title: Immunoconjugates useful for treating gastro-intestinal tumors, processes for their preparation and pharmaceutical compositions containing them
Inventor: ANDREW FIRMAN WRIGHT
IPC: A61K47/48
Filed: 1992-09-19
Granted: 1998-04-11
Abstract: A conjugate of the following formula: (formula) in which A is a recombinant ricin A, and B is the binding part of the target cell which is a C242 antibody; S1 is a sulfur atom on the recombinant ricin A; NH is on the C242 antibody; S2 is a sulfur atom group and X is a linear (1-6C) alkyl which is optionally substituted by one or two substituents selected from (1-6C)alkyl.
Patent TW-211540-B (TW)
IPC: B29D30/54
Filed: 1993-01-12
Granted: 1993-08-21
Abstract: A method for renewing the side-walls (6) of a tyre (P) of the ''town'' type consists, after preparing the area to be renewed, in applying, over the said area and by means of a bonding gum (10), rubber blocks (11) forming, between them, grooves (12). All the operational phases of the method are carried out on a tyre (P) mounted on a vehicle and inflated to its service pressure. <IMAGE>
Patent TW-226353-B (TW)
Title: Rudder blades for medium and heavy tonnage ship
IPC: B63H25/38
Filed: 1993-02-16
Granted: 1994-07-11
Abstract: The invention concerns all the rudder blades: direction, stabilizing and also diving rudder blades for submarines. Its aim is to make them lightweight and easier to be fabricated using composite materials. According to the invention, the fin keel (1') of these rudder bladse comprises a steel frame (4') interdepentant of interface (3') with the rudder spindle allowing to orientate them, the fin keel being formed by moulding a foam (5') beyond the steel frame. The assembly is coated with an envelope (6') made of glass-resin composite.
Patent TW-239084-B (TW)
IPC: B05C9/14
Filed: 1993-07-09
Granted: 1995-01-21
Abstract: Proposed is a method of powder-coating electrically conducting workpieces (1) with a coating powder, in particular a paint coating powder. The method comprises the following steps: first, the optionally cleaned and/or surface-treated workpiece (1) is heated inductively by means of an inductor (2) to the processing temperature or melting or softening point of the coating powder. The coating powder is then sprayed on to the inductively heated workpiece (1) by means of a spraying device (3, 8) so that the coating powder is at least fused on to the inductively heated workpiece (1) by the heat of the workpiece (1).
Patent TW-259700-B (TW)
IPC: A61F13/49
Filed: 1993-09-24
Granted: 1995-10-11
Abstract: Absorbent articles having a unique elastic feature improving the dynamic fit as well as containment characteristics. The elastic feature preferably comprises an elastomeric member and a nonelastic web; a portion of the nonelastic web coincides with at least a portion of the elastomeric member; this portion of the nonelastic web being mechanically prestrained. Mechanical prestraining of the nonelastic web improves not only the extension of the elastomeric member, but also the heat-shrink contraction of preferred elastomeric members.
Patent TW-401394-B (TW)
Title: Thromboxane A2 receptor antagonism and antioxidtion of cinnamophilin and its derivatives
Inventor: DENG JE-MING
IPC: A61K31/21
Filed: 1994-07-21
Granted: 2000-08-11
Abstract: The cinnamophilin derivatives of this invention is the compound containing lignan structure as the following formula (I), wherein R1 is a hydrogen, C1-8 alkyl group, or C1-8 ester group; R2 is a ketone group or hydroxyl group. The compounds when R1 is a hydrogen and R2 is a ketone group are the natural cinnamophilin materials taken from the natural environment for the first time, and they are also used in the form of cinnamphilin to prepare a series of derivatives by a synthetic method. The resulted cinnamophilin derivatives have been verified by the in vitro anti-platelet agglutination activity test, the blood vessel relaxation, the trachea relaxation , and the anti-oxidation.
Patent TW-268151-B (TW)
Title: Anti-electrostatic discharge protecting circuit
Inventor: KE MING-DAW
IPC: H01L23/60
Filed: 1994-11-26
Granted: 1996-01-11
Abstract: An anti-electrostatic discharge protecting circuit, that is applicable to one input/output buffer pad connected to one internal circuit, coupled to between one first reference voltage and one second reference voltage to prevent electrostatic discharge along the input/output buffer pad from destroying the internal circuit, comprises: one first SCR with one anode, one cathode, one anode gate and one cathode gate, in which the anode and the anode gate of the first SCR is connected to the first reference voltage, the cathode of the first SCR is connected to the input/output buffer pad, in which the cathode gate of the first SCR is connected to the second reference voltage; one P field effect transistor with one drain, one source, one gate and one base, in which the gate, the source and the base of the P field effect transistor are connected to the first reference voltage, in which the drain of the P field effect transistor is connected to the cathode gate of the first SCR; one second SCR with one anode, one cathode, one anode gate and one cathode gate, in which the cathode and the cathode gate of the second SCR is connected to the second reference voltage, the anode of the second SCR is connected to the input/output buffer pad, in which the anode gate of the second SCR is connected to the second reference voltage; one N field effect transistor with one drain, one source, one gate and one base, in which the gate, the source and the base of the N field effect transistor are connected to the second reference voltage, in which the drain of the N field effect transistor is connected to the anode gate of the second SCR.
Patent TW-495541-B (TW)
Title: Unsaturated polyesterurethane acrylates as binders for powder coatings
Inventor: BRINDOEPKE GERHARD
IPC: C09D175/16
Filed: 1995-08-08
Granted: 2002-07-21
Abstract: Binders for powder coatings, comprising solid, unsaturated polyesterurethane acrylates having a melting temperature of from 35 to 180 DEG C.
Patent TW-378214-B (TW)
Title: Transparent rubber-modified styrene-based resin
Inventor: OTSUZUKI SHIROU
IPC: C08L25/14
Filed: 1995-09-15
Granted: 2000-01-01
Abstract: The manufacturing process involves the polymerization of styrene monomer and alkyl(meth)acrylate in the presence of styrene-butadiene copolymer (a rubber-like polymer) with narrow molecular weight distributions and specific structures.  As the styrene-alkyl(meth)acrylate copolymers (which have very similar refractive index as the rubber-like polymer) are formed, the rubber-like polymers are granulized and dispersed in the styrene-alkyl(meth)acrylate copolymers, resulting in a resin with high transparency and good impact resistance.
Patent TW-327262-B (TW)
Title: Wideband vector modulator
Inventor: TIMOTHY HALLORAN
IPC: H04L27/24
Filed: 1995-10-27
Granted: 1998-02-21
Abstract: A wideband vector modulator, which comprises: a local oscillator providing a periodic sinusoidal output signal; a plurality of quadrature-phase-shift-key (QPSK) modulator elements, each comprising a GaAs microwave monolithic integrated circuit and separately coupled to the local oscillator for receiving the periodic sinusoidal output signal therefrom and separately coupled for receiving a first and a second control digital input signal (D), in which the state of the respective digital input signals determines which of four phase states are present at the output of the QPSK modulator; a plurality of summing devices are coupled to outputs of the modulator elements, in which one summing device provides an analog constellation output signal of the vector modulator; a plurality of attenuators provided between specific summing devices and between an output of a specific modulator element and a specific summing device for amplitude coupling weighting output signals from the plurality of QPSK modulator elements, in which the outputs of the quadrature-phase-shift-key (QPSK) modulator elements are summed under control of their two respective digital input signals (D) and the local oscillator by the wideband vector modulator to convert the digital input signals (D) into phase and amplitude shifted, periodic, analog signals comprising the analog constellation output signal.
Patent TW-I239004-B (TW)
Title: Disc-like record carrier, recording and/or reading apparatus for recording/reading information in the record carrier
Inventor: MONS JOHANNES JAN
IPC: G11B7/007
Filed: 1995-12-27
Granted: 2005-09-01
Abstract: A disc-like record carrier (1) is disclosed on which control information is recorded. The control information comprises diameter information which is indicative of the diameter of the record carrier. An information recording and/or reading apparatus comprises a drive means (2) for rotatingly driving the disc-like record carrier (1). The apparatus comprises a control unit (5) which adapts the loop gain of a control loop (2, 3, 7, 8, 9) for controlling the number of revolutions per minute of the record carrier (1) in dependence on the control information recorded on the record carrier.
Patent TW-381378-B (TW)
Title: Bidirectional optical amplifier and bidirectional telecommunicatioin method
Inventor: MELI FAUSTO
IPC: H04B10/00
Filed: 1996-01-24
Granted: 2000-02-01
Abstract: A bidirectional optical amplifier, comprising a unidirectional optical amplifying unit having one amplification wavelength band; two input/output ports for at least two optical signals having opposite propagation direction, said signals having a first and a second wavelength respectively, which are distinct from each other and included in said amplification wavelength band; two first and two second wavelength-selective optical couplers, having a first wavelength pass-band including said first wavelength and a second wavelength pass-band including said second wavelength respectively, said first and second wavelength pass-bands being devoid of relative overlapping, wherein said amplifying unit is connected between two opposite nodes of an optical bridge circuit, and wherein at the nodes of said bridge circuit said first and second selective optical couplers are present, in which said first and second selective couplers are disposed symmetrically to said amplifying unit and to said input/output ports of said optical signals.
Patent TW-340113-B (TW)
Title: Preparation of caprolactam
Inventor: EBERHARD FUCHS
IPC: C07D201/02
Filed: 1996-05-02
Granted: 1998-09-11
Abstract: A sort of method of preparation caprolactam by reacting 6-aminocapronitrile with water in the presence of catalysts comprizing the use of a starting mixture of 6-aminocapronitrile and the tetrahydroazepine derivatives of the following formula: (formula ) and conducting the reaction in liquid phase in the presence of a teterogeneous catalyst such as titanium dioxide, zirconium dioxide, caesium oxide or aluminum oxide in the liquid phase with a temperature between 140-320oC and pressure of 1-250 bar, where the consumption of water of at least 0.01 Mh per derivative I.
Patent TW-368491-B (TW)
Title: Ozone generating apparatus
Inventor: KAJI NARUHIKO
IPC: C01B13/11
Filed: 1996-05-17
Granted: 1999-09-01
Abstract: An ozone generating apparatus for producing highly pure ozone gas which can be used in the semiconductor manufacturing process. The ozone generating apparatus comprises a high voltage source an ozone generating cell which generates ozone gas by supplying a material gas while applying a high voltage from the high voltage source, and a passage for delivering the generated ozone gas from the ozone generating cell to a desired location. The passage comprises a material which has a passivation film formed by a passivation treatment in a dry process. The oxide passivation film comprises chromium oxide film, iron oxide film or a composite film of chromium oxide and iron oxide.
Patent TW-381978-B (TW)
Title: Surface coating method for key board
Inventor: TSAI JI-LUNG
IPC: B05D3/02
Filed: 1996-08-05
Granted: 2000-02-11
Abstract: The invention relates to a kind of surface coating method for key board which can improve the characteristics of keys made of silicone rubber so as to have excellent wear durability and material quality like the plastic material. And, the user can have excellent touch feeling during usage.
Patent TW-332202-B (TW)
Title: Pyridazin-3-one derivative, their use, and intermediates for their production
Inventor: KATAYAMA TADASHI
IPC: A01N43/84
Filed: 1996-08-20
Granted: 1998-05-21
Abstract: A compound of the formula (I) (I) in which R1 is C1-C3-haloalkyl; R2 and R3 are the same or different and are hydrogen, C1-C3-alkyl, C1-C3-haloalkyl, or C1-C3-alkoxy C1-C3-alkyl; and Q is [Q1], [Q-2], [Q-3], or [Q-4] of the formula: [Q1], [Q-2], [Q-3], [Q-4] in which X is hydrogen or halogen; Y is halogen, nitro, cyano, or trifluoromethyl; Z1 is oxygen, sulfur, or NH; Z2 is oxygen or sulfur; n is 0 or 1; B is hydrogen, nitro, OR10, SR10, N(R11)R12, NR11(SO2R14), CR17=CR18COR16, CR17=CR18COOR13, CH2CH-WCOOR13, CR17=NOR33, or CR17(Z2-R34)2; R4 is hydrogen or C1-C3-alkyl; R5 is C1-C6-alkyl, C3-C6-alkynyl, or (C3-C8 cycloalkoxy)-carbonyl C1-C6-alkyl; R6 is C1-C6-alkyl; R7 is hydrogen or C1-C6-alkyl; and R8 is C1-C6-alkyl, hydroxy C1-C6-alkyl, (C1-C5-alkyl)carbonyloxy-C1-C6-alkyl, or (C1-C8-alkoxy)-carbonyl; in which R10 is hydrogen, C1-C6-alkyl, benzyl, C3-C6-alkenyl, C3-C6-haloalkenyl, C3-C6-alkynyl, C3-C6-haloalkynyl, cyano C1-C6-alkyl, carboxy C1-C6-alkyl, (C1-C8-alkoxy)carbonyl-C1-C6-alkyl, (C3-C8-cycloalkoxy)carbonyl C1-C6-alkyl, CH2CON-(R11)R12, CH2COON(R11)R12, CH(C1-C4-alkyl)CON(R11)R12, CH(C1-C4-alkyl)-COON(R11)R12 or ((C1-C6-alkoxy)carbonyl C1-C6-alkyl)-oxycarbonyl C1-C6-alkyl; R11 and R12 are independently hydrogen, C1-C6-alkyl, C1-C6-haloalkyl, or (C1-C6-alkoxy)carbonyl C1-C6-alkyl; R13 is C1-C6-alkyl; R14 and R15 are independently C1-C6-alkyl or C1-C6-haloalkyl; R16 is C1-C6-alkyl or C2-C8-alkoxyalkyl R17 and R18 are independently hydrogen or C1-C6-alkyl; R19 is C1-C6-alkyl; R33 is C1-C6-alkyl; R34 is C1-C6-alkyl, or two R34^s are combined together to form (CH2)2 or (CH2)3; and W is hydrogen, chlorine, or bromine.
Patent TW-323955-B (TW)
Title: Intermittent suction control device with a timing module
Inventor: MICHAEL A KRUPA
IPC: A61M1/00
Filed: 1996-09-17
Granted: 1998-01-01
Abstract: An intermittent suction control device with a timing module to control a valve mechanism in a position of one of two states, in which the timing module comprises: a substrate which comprises multiple channels and perforations for transmission of vacuum or atmosphere; a diaphragm assembly coupled to the substrate; a gear coupled to an arm, which is connected with the valve mechanism; in which the diaphragm assembly comprises a diaphragm coupled to the gear which is alternately exposed to a vacuum source or atmosphere, in which the alternate exposure enables the gear to move in a first direction or a second direction, respectively, in which the movement in the first direction defines a closure time and the movement in the second direction defines an open time and also defines a timing ratio.