WO2015123739A1 - Improvement to piston of manual sprayer pressurising system - Google Patents
Improvement to piston of manual sprayer pressurising system Download PDFInfo
- Publication number
- WO2015123739A1 WO2015123739A1 PCT/BR2014/000061 BR2014000061W WO2015123739A1 WO 2015123739 A1 WO2015123739 A1 WO 2015123739A1 BR 2014000061 W BR2014000061 W BR 2014000061W WO 2015123739 A1 WO2015123739 A1 WO 2015123739A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- connecting rod
- piston
- rings
- tank
- cylinder
- 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.)
- Ceased
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
- B05B9/08—Apparatus to be carried on or by a person, e.g. of knapsack type
- B05B9/085—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump
- B05B9/0877—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump the pump being of pressure-accumulation type or being connected to a pressure accumulation chamber
Definitions
- the present innovation relates to a new mechanical assembly model for manual pumping pressurization of portable sprayers.
- the whole assembly is contained within the tank of a sprayer, consisting basically of two parts; the piston rod or piston, which is positioned at the lower end of the tank and fixed to the base or chassis of the sprayer, and the expansion rings, which are positioned at the upper end of the piston rod.
- These rings are two pieces, each with a small opening to allow mounting in overlapping radial channels in the connecting rod.
- the rings are designed to allow proper coupling to a hollow cylinder that is moved up and down by means of a hand lever, overlapping the rings during movement and thus providing pressurization to a liquid accumulator chamber above. and interconnected to the cylinder; therefore, the rings act as a fixed piston.
- the rings are designed so that, when they come into contact with the cylinder walls, they can close their small openings resulting in the efficient sealing of the system for retaining the admitted air.
- This enhancement designed for the handheld sprayer 'pressurization system' piston allows for the replacement of traditional and widespread plungers, which are commonly referred to as 'bushings' and also o-rings, providing a smaller wear maintenance / replacement, ie longer durability and less operator effort to pressurize (pumping), especially under low or no lubrication conditions when compared to the usual components in these systems.
- hand-held pressurized handheld sprayers are provided with either a piston or diaphragm pump set.
- this system works inside a liquid storage tank, is associated with an elongated cylindrical chamber that acts as an accumulator and a cylinder itself, which depending on the model of the sprayer can be either an extension of the accumulator - in this case moving on the piston and its piston, fixed at the base of the tank - or, the arrangement can be inverted (fixed cylinder at the base of the tank and piston being a accumulator extension and moving inside the cylinder).
- plunger pressurization systems utilize materials that require longer lubrication times to perform better and provide less resistance to movement within the cylinder, resulting in less effort on operator movement.
- the plunger is often in contact with grout (water + chemical mixture), is subject to rapid lubrication loss as well as chemical attack.
- the design / profile of the expansion rings and their housing reduces the contact area with the cylinder wall during pumping, consequently reducing the frictional wear area and, comparatively, allowing a lower application of force of the cylinder. operator on the drive lever to achieve the same end pressure.
- lubrication of expansion rings is also recommended, comparatively, if it is working without lubrication, it gives the operator less effort, thus having the advantages of allowing operator fatigue reduction, increased between maintenance / lubrication intervals - reducing costs - and increasing equipment operating efficiency (more time actually working).
- this technical improvement aims to provide better performance of the hand-operated piston pressurization system in portable sprayers through innovative features that result in less wear of the components of the system, lower maintenance / lubrication periodicity and, consequently, lower expenses with preventive (system lubrication) and corrective (component replacement) maintenance, allied to this, also results in a lower operating effort to the user.
- the advantages of the system result in great benefit to the user, by the sum of the increased operating efficiency, reduced fatigue and reduced labor costs.
- Figure 1 illustrates a perspective view of the connecting rod or piston with its fasteners.
- Figure 2 illustrates a perspective view of the expansive rings highlighting the closure profile.
- Figure 3 illustrates a perspective view of the expansion rings provided with opening to provide mounting on the radial channels of the connecting rod.
- Figure 4 illustrates a sectional front view of the connecting rod - expansion ring assembly attached to the tank in the pressurization position of the liquid accumulator chamber.
- Figure 5 illustrates an enlarged perspective view of the connecting rod - expansion ring assembly assembled as suggested for system application.
- the present system comprises an injected connecting rod (1) having lower end fasteners (2) and radial channels at its upper end (2a) for accommodating the expanding rings (3), which in turn instead have specific geometry, being provided with asymmetrical projections at each end, conforming the closure profile (3a), providing a constructive arrangement focused on the characteristics of the product application.
- the developed geometry aims to provide due circularity of the expansive ring (3) when mounted on the inner diameter of the cylinder (5), as well as the contact in the closing profile (3a) to prevent leakage through this region. of the component.
- the assembly formed by the connecting rod (1) and expansion ring (2) is fixed to the chemical tank (8) through the lower end joining the liquid tank with the support structure (7) of the equipment.
- the cylindrical elongated chamber (4) which acts as an accumulator has a so-called cylinder extension (5) which interconnects the connecting rod-expansion ring assembly with the accumulator chamber.
- the movement generated by the manual actuation of the lever (6) provides the upward and downward displacement of the cylinder in relation to the connecting rod - expansion ring, culminating in the suction of the tank liquid and the compression of the accumulator chamber.
- the pressurized liquid will be directed to the discharge system containing at its end a specific nozzle that delimits the flow and defines the shape of the spray jet. Therefore, the fact that the liquid is under certain pressure is a major factor in the application and effectiveness of the equipment.
- the sealing provided by the rings (3) occurs precisely due to their dimensions and geometry of the closing region which as previously mentioned promote the entrapment of the admitted air.
Landscapes
- Catching Or Destruction (AREA)
- Nozzles (AREA)
Abstract
Description
APERFEIÇOAMENTO INTRODUZIDO EM PISTÃO DE SISTEMA IMPROVEMENT INTRODUCED IN PISTON SYSTEM
DE PRESSURIZAÇÃO MANUAL PARA PULVERIZADOR PRESSURIZATION INSTRUCTIONS FOR SPRAY
CAMPO DA APLICAÇÃO FIELD OF APPLICATION
A presente inovação refere-se a um novo modelo de conjunto mecânico para efetuar a pressurização, por meio de bombeamento manual, em pulverizadores portáteis. Todo o conjunto encontra-se contido no interior do tanque de um pulverizador, sendo constituído basicamente de duas partes; a biela ou pistão, que é posicionada na extremidade inferior do tanque e fixada na base ou chassi do pulverizador e, os anéis de expansão, os quais encontram se posicionados na extremidade superior da biela. Esses anéis tratam-se de duas peças, cada uma com uma pequena abertura para permitir a montagem em canais radiais sobrepostos na biela. Os anéis são projetados de modo a permitir correto acoplamento em um cilindro oco que é movimentado para cima e para baixo, por meio de uma alavanca manual, ficando sobreposto aos anéis durante movimentação e assim proporcionando pressurização a uma câmara acumuladora de líquido que se encontra acima e interligada ao cilindro; assim sendo, os anéis funcionam como um êmbolo fixo. Os anéis são projetados para que, ao entrarem em contato com as paredes do cilindro, permitam o fechamento das suas pequenas aberturas resultando na vedação eficiente do sistema para a retenção do ar admitido. The present innovation relates to a new mechanical assembly model for manual pumping pressurization of portable sprayers. The whole assembly is contained within the tank of a sprayer, consisting basically of two parts; the piston rod or piston, which is positioned at the lower end of the tank and fixed to the base or chassis of the sprayer, and the expansion rings, which are positioned at the upper end of the piston rod. These rings are two pieces, each with a small opening to allow mounting in overlapping radial channels in the connecting rod. The rings are designed to allow proper coupling to a hollow cylinder that is moved up and down by means of a hand lever, overlapping the rings during movement and thus providing pressurization to a liquid accumulator chamber above. and interconnected to the cylinder; therefore, the rings act as a fixed piston. The rings are designed so that, when they come into contact with the cylinder walls, they can close their small openings resulting in the efficient sealing of the system for retaining the admitted air.
Esse aperfeiçoamento projetado para o pistão de sistema de pressurização' em pulverizadores portáteis, permite a substituição dos tradicionais e difundidos êmbolos, que são as comumente denominadas "buchas" e também, os anéis de vedação não segmentados (o'rings), proporcionando uma menor manutenção/reposição por desgaste, ou seja, maior durabilidade e, um menor esforço do operador para efetuar a pressurização (bombeamento) , principalmente em condições de pouca ou ausente lubrificação, quando comparados aos componentes usuais nesses sistemas . This enhancement designed for the handheld sprayer 'pressurization system' piston allows for the replacement of traditional and widespread plungers, which are commonly referred to as 'bushings' and also o-rings, providing a smaller wear maintenance / replacement, ie longer durability and less operator effort to pressurize (pumping), especially under low or no lubrication conditions when compared to the usual components in these systems.
DESCRIÇÃO DO ESTADO DA TÉCNICA DESCRIPTION OF TECHNICAL STATE
No campo da técnica em questão, os pulverizadores portáteis com sistema de pressurização por acionamento manual são dotados ou de conjunto de bombeamento tipo pistão ou diafragma. Considerando, no âmbito de interesse desse estudo, somente os de tipo pistão, sabe-se que esse sistema trabalha dentro de um tanque para armazenamento de produtos líquidos, está associado a uma câmara cilíndrica alongada que funciona como acumulador e um cilindro, propriamente dito, o qual conforme modelo do pulverizador, pode ser ou um prolongamento do acumulador - nesse caso movimentando se sobre o pistão e seu êmbolo, fixos na base do tanque - ou, a disposição pode ser invertida (cilindro fixo na base do tanque e pistão sendo um prolongamento do acumulador e se movimentando no interior do cilindro) . In the field of the art, hand-held pressurized handheld sprayers are provided with either a piston or diaphragm pump set. Considering that only the piston-type ones are within the scope of this study, it is known that this system works inside a liquid storage tank, is associated with an elongated cylindrical chamber that acts as an accumulator and a cylinder itself, which depending on the model of the sprayer can be either an extension of the accumulator - in this case moving on the piston and its piston, fixed at the base of the tank - or, the arrangement can be inverted (fixed cylinder at the base of the tank and piston being a accumulator extension and moving inside the cylinder).
Nesse sistema, salvo raras exceções (como por exemplo a PI9501347-4 e PI0105864-9) , existe uma haste acoplada ao extremo superior da câmara acumuladora (que se entende para fora do tanque) e a essa, uma alavanca para acionamento manual que irá transmitir o movimento (para cima e para baixo) ao conjunto. Por meio desse movimento, o êmbolo se desloca dentro do cilindro, ou vice-versa, e devido ao sentido do movimento, hora ele aspira o líquido a partir do tanque para o cilindro (admissão), hora o êmbolo comprime o líquido aspirado e injeta-o sobre pressão para o interior da câmara acumuladora, em não havendo saída para o tanque. Com a repetição do movimento/acionamento manual da alavanca, ocorre aumento da pressão no interior da câmara e o equipamento está apto a pulverizar o líquido - por meio de uma mangueira conectada a câmara e nessa última, um lança com uma válvula controladora de fluxo de saída e uma ponta de pulverização na sua extremidade. In this system, except for rare exceptions (such as PI9501347-4 and PI0105864-9), there is a rod attached to the upper end of the accumulator chamber (which is meant for outside the tank) and to this, a lever for manual actuation that will transmit the movement (up and down) to the set. By means of this movement, the plunger travels inside the cylinder, or vice versa, and due to the direction of movement, time it draws liquid from the tank into the cylinder (inlet), time the plunger compresses the aspirated liquid and injects you under pressure to the inside the accumulator chamber, with no outlet to the tank. Repeated manual movement / actuation of the pressure increases the pressure inside the chamber and the equipment is able to spray the liquid - through a hose connected to the chamber and the latter a boom with a flow control valve. outlet and a spray tip at its end.
No geral, os equipamentos com esse sistema de pressurização, devido a sua capacidade limitada de deslocamento volumétrico (pela seção do cilindro) , são operados a frequências de acionamento da alavanca que variam normalmente entre 15 a 25 por minuto. Essa operação, considerando o uso agrícola, onde as pulverizações para controles dos problemas fitossanitários são cada vez mais frequentes, resulta em uma movimentação e desgaste rápidos e intensivos dos componentes do sistema de pressurização desses equipamentos, em especial do êmbolo (bucha, o'ring, anel) que fica em frequente fricção com a parede do cilindro pelo qual se desloca. Como resultado disso, essas peças estão cada vez mais sujeitas a frequentes substituições/reposições por desgaste, podendo prejudicar o rendimento da operação e gerando insatisfação do cliente. In general, equipment with this pressurization system, due to its limited volumetric displacement capability (by cylinder section), is operated at lever drive frequencies that normally range from 15 to 25 per minute. This operation, considering agricultural use, where spraying to control phytosanitary problems is increasingly frequent, results in rapid and intensive movement and wear of the pressurization system components of these equipment, especially the plunger (bushing, o'ring , ring) which is in frequent friction with the wall of the cylinder by which it moves. As a result, these parts are increasingly subject to frequent wear and tear, which can degrade operating performance and generate customer dissatisfaction.
Além disso, os tradicionais sistemas de pressurização por êmbolo utilizam materiais que necessitam de uma maior periodicidade da lubrificação para que tenham seu melhor desempenho e proporcionem menor resistência ao movimento dentro do cilindro, resultando em menor esforço ao movimento do operador. Como nesses pulverizadores o êmbolo está frequentemente em contato com caldas (mistura água + produto químico) , está sujeito à rápida perda da lubrificação, bem como, ao ataque químico. In addition, traditional plunger pressurization systems utilize materials that require longer lubrication times to perform better and provide less resistance to movement within the cylinder, resulting in less effort on operator movement. As with these sprayers the plunger is often in contact with grout (water + chemical mixture), is subject to rapid lubrication loss as well as chemical attack.
OBJETIVO DO MODELO OBJECTIVE OF THE MODEL
No sistema proposto, o projeto/perfil dos anéis de expansão e do seu alojamento reduzem a área de contato com a parede do cilindro durante o bombeamento, consequentemente reduzindo a área de desgaste por fricção e ainda, comparativamente, possibilitando uma menor aplicação de força do operador na alavanca de acionamento para se obter uma mesma pressão final. Além do mais, apesar de também ser recomendada a lubrificação dos anéis de expansão, comparativamente, se o mesmo estiver trabalhando sem lubrificação ele proporciona um menor esforço ao operador, dessa forma, apresenta as vantagens de permitir a redução da fadiga do operador, o aumento dos intervalos entre as manutenções/lubrificações - reduzindo seus custos- e, o aumento do rendimento operacional do equipamento (mais tempo efetivamente trabalhando) . In the proposed system, the design / profile of the expansion rings and their housing reduces the contact area with the cylinder wall during pumping, consequently reducing the frictional wear area and, comparatively, allowing a lower application of force of the cylinder. operator on the drive lever to achieve the same end pressure. Moreover, although lubrication of expansion rings is also recommended, comparatively, if it is working without lubrication, it gives the operator less effort, thus having the advantages of allowing operator fatigue reduction, increased between maintenance / lubrication intervals - reducing costs - and increasing equipment operating efficiency (more time actually working).
Portanto, considerando as limitações do estado da técnica ora apresentadas, esse aperfeiçoamento técnico tem como objetivo proporcionar um melhor desempenho do sistema de pressurização do tipo pistão de acionamento manual, em pulverizadores portáteis, por meio de características inovadoras que resultam em menor desgaste dos componentes do sistema, menor periodicidade de manutenção/lubrificação e consequentemente, menores gastos com manutenção preventiva (lubrificação do sistema) e corretiva (reposição de componentes), aliado a isso, resulta também em um menor esforço de operação ao usuário. Frente ao exposto, as vantagens do sistema resulta em grande benefício ao usuário, pela somatória do aumento de rendimento operacional, redução de fadiga e redução dos custos de trabalho. Therefore, considering the limitations of the state of the art presented here, this technical improvement aims to provide better performance of the hand-operated piston pressurization system in portable sprayers through innovative features that result in less wear of the components of the system, lower maintenance / lubrication periodicity and, consequently, lower expenses with preventive (system lubrication) and corrective (component replacement) maintenance, allied to this, also results in a lower operating effort to the user. Given the above, the advantages of the system result in great benefit to the user, by the sum of the increased operating efficiency, reduced fatigue and reduced labor costs.
BREVE DESCRIÇÃO DAS FIGURAS BRIEF DESCRIPTION OF THE FIGURES
A Figura 1 ilustra uma vista em perspectiva da biela ou pistão com seus elementos fixadores. Figure 1 illustrates a perspective view of the connecting rod or piston with its fasteners.
A Figura 2 ilustra uma vista em perspectiva dos anéis expansivos destacando o perfil de fechamento. Figure 2 illustrates a perspective view of the expansive rings highlighting the closure profile.
A Figura 3 ilustra uma vista em perspectiva dos anéis expansivos dotados de abertura para proporcionar a montagem nos canais radiais da biela. Figure 3 illustrates a perspective view of the expansion rings provided with opening to provide mounting on the radial channels of the connecting rod.
A Figura 4 ilustra uma vista frontal em corte do conjunto biela - anel expansivo fixado no tanque na posição de pressurização da câmara acumuladora de liquido. Figure 4 illustrates a sectional front view of the connecting rod - expansion ring assembly attached to the tank in the pressurization position of the liquid accumulator chamber.
A Figura 5 ilustra uma vista em perspectiva ampliada do conjunto biela - anel expansivo montado conforme sugerido para a aplicação do sistema. Figure 5 illustrates an enlarged perspective view of the connecting rod - expansion ring assembly assembled as suggested for system application.
DESCRIÇÃO DETALHADA DAS FIGURAS DETAILED DESCRIPTION OF THE FIGURES
Com base nas figuras de 1 a 5, o presente sistema compreende uma biela (1) injetada que possui fixadores na extremidade inferior (2) e canais radiais na sua extremidade superior (2a) para alojamento dos anéis expansivos (3) , estes por sua vez possuem geometria especifica, sendo providos de projeções assimétricas em cada extremidade, conformando o perfil de fechamento (3a), provendo uma disposição construtiva voltada para as características da aplicação do produto. A geometria desenvolvida possui como objetivo proporcionar a devida circularidade do anel expansivo (3) , quando montado no diâmetro interno do cilindro (5), além do contato no perfil de fechamento (3a) para evitar vazamentos através desta região do componente . Based on figures 1 to 5, the present system comprises an injected connecting rod (1) having lower end fasteners (2) and radial channels at its upper end (2a) for accommodating the expanding rings (3), which in turn instead have specific geometry, being provided with asymmetrical projections at each end, conforming the closure profile (3a), providing a constructive arrangement focused on the characteristics of the product application. The developed geometry aims to provide due circularity of the expansive ring (3) when mounted on the inner diameter of the cylinder (5), as well as the contact in the closing profile (3a) to prevent leakage through this region. of the component.
O conjunto formado pela biela (1) e anel expansivo (2) é fixado no tanque químico (8) através da extremidade inferior unindo o tanque de líquidos com a estrutura de suporte (7) do equipamento . The assembly formed by the connecting rod (1) and expansion ring (2) is fixed to the chemical tank (8) through the lower end joining the liquid tank with the support structure (7) of the equipment.
A câmara alongada cilíndrica (4) que funciona como um acumulador possui um prolongamento denominado de cilindro (5) que interliga o conjunto biela - anel expansivo com a câmara acumuladora. The cylindrical elongated chamber (4) which acts as an accumulator has a so-called cylinder extension (5) which interconnects the connecting rod-expansion ring assembly with the accumulator chamber.
O movimento gerado pelo acionamento manual da alavanca (6) proporciona o deslocamento ascendente e descendente do cilindro em relação ao conjunto biela - anel expansivo, culminando na sucção do liquido do tanque e na compressão da câmara acumuladora. The movement generated by the manual actuation of the lever (6) provides the upward and downward displacement of the cylinder in relation to the connecting rod - expansion ring, culminating in the suction of the tank liquid and the compression of the accumulator chamber.
Funcionamento do sistema System Health
Com o equipamento abastecido e em condições de uso, o movimento ascendente transmitido pela alavanca (6) faz com que a câmara cilíndrica (4) e consequentemente o cilindro (5) se desloquem para cima com relação ao conjunto biela - anel expansivo (figura 3) , promovendo com isso a sucção do liquido do tanque (8) . No momento em que é aplicado o movimento descendente na alavanca (6) a biela dotada de anéis comprime o liquido, injetando o mesmo pressurizado na câmara acumuladora. Este ciclo repete-se durante todo o período de trabalho do equipamento. With the equipment supplied and in working condition, the upward movement transmitted by the lever (6) causes the cylindrical chamber (4) and consequently the cylinder (5) to move upward with respect to the connecting rod - expansion ring assembly (figure 3 ), thereby promoting the suction of the tank liquid (8). At the moment the downward movement is applied to the lever (6) the ringed connecting rod compresses the liquid, injecting the pressurized fluid into the accumulator chamber. This cycle repeats throughout the working period of the equipment.
O liquido pressurizado será direcionado para o sistema de descarga contendo na sua extremidade um bico específico que delimita a vazão e define a forma do jato de pulverização. Portanto, o fato do liquido estar sob determinada pressão é um fator preponderante na aplicação e na eficácia do equipamento. The pressurized liquid will be directed to the discharge system containing at its end a specific nozzle that delimits the flow and defines the shape of the spray jet. Therefore, the fact that the liquid is under certain pressure is a major factor in the application and effectiveness of the equipment.
Para que toda a dinâmica citada acima ocorra de maneira satisfatória, é imprescindível a vedação do cilindro (5) e consequentemente da câmara acumuladora (4) . Cabendo aos anéis expansivos (3) representar o agente vedante do sistema tanto no ciclo de sução como no de pressurização. For all the dynamics mentioned above to occur from In a satisfactory manner, sealing of the cylinder (5) and consequently of the accumulator chamber (4) is essential. It is up to the expansion rings (3) to represent the sealing agent of the system in both suction and pressurization cycles.
A vedação proporcionada pelos anéis (3) ocorre devido justamente a suas dimensões e geometria da região de fechamento que conforme dito anteriormente promovem o aprisionamento do ar admitido. The sealing provided by the rings (3) occurs precisely due to their dimensions and geometry of the closing region which as previously mentioned promote the entrapment of the admitted air.
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/BR2014/000061 WO2015123739A1 (en) | 2014-02-24 | 2014-02-24 | Improvement to piston of manual sprayer pressurising system |
| CN201480075616.3A CN106061625B (en) | 2014-02-24 | 2014-02-24 | Improvements to the Piston of the Pressurized System of the Manual Sprayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/BR2014/000061 WO2015123739A1 (en) | 2014-02-24 | 2014-02-24 | Improvement to piston of manual sprayer pressurising system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015123739A1 true WO2015123739A1 (en) | 2015-08-27 |
Family
ID=53877449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/BR2014/000061 Ceased WO2015123739A1 (en) | 2014-02-24 | 2014-02-24 | Improvement to piston of manual sprayer pressurising system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106061625B (en) |
| WO (1) | WO2015123739A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2935248A (en) * | 1957-10-03 | 1960-05-03 | Carrier Corp | Compressor valve arrangement |
| BR9609572A (en) * | 1995-07-07 | 1999-08-17 | Gilmour Inc | Back sprayer |
| US6089414A (en) * | 1997-03-06 | 2000-07-18 | Hayes Products, Llc | Pump assembly with one piece piston |
| US6412707B1 (en) * | 2001-02-06 | 2002-07-02 | Pedro Wirz | Compact portable sprayer with leak-prevention pump system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2455383Y (en) * | 2000-12-12 | 2001-10-24 | 耿焕斗 | Knapsack hand sprayer |
| JP5781332B2 (en) * | 2011-02-28 | 2015-09-24 | 三菱重工業株式会社 | piston ring |
-
2014
- 2014-02-24 CN CN201480075616.3A patent/CN106061625B/en not_active Expired - Fee Related
- 2014-02-24 WO PCT/BR2014/000061 patent/WO2015123739A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2935248A (en) * | 1957-10-03 | 1960-05-03 | Carrier Corp | Compressor valve arrangement |
| BR9609572A (en) * | 1995-07-07 | 1999-08-17 | Gilmour Inc | Back sprayer |
| US6089414A (en) * | 1997-03-06 | 2000-07-18 | Hayes Products, Llc | Pump assembly with one piece piston |
| US6412707B1 (en) * | 2001-02-06 | 2002-07-02 | Pedro Wirz | Compact portable sprayer with leak-prevention pump system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106061625B (en) | 2019-02-26 |
| CN106061625A (en) | 2016-10-26 |
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