Hand-held spraying apparatus having a multi-compartment liquid-holding reservoir
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A62C-005/02
A62C-005/00
출원번호
US-0900340
(2004-07-27)
등록번호
US-7311265
(2007-12-25)
발명자
/ 주소
Bhatia,Kamlesh Kumar
출원인 / 주소
E.I. du Pont de Nemours and Company
인용정보
피인용 횟수 :
9인용 특허 :
4
초록▼
A liquid reservoir of a hand-held, air-assisted spray apparatus is characterized by a plurality (i.e., two or more) of liquid-holding compartments. Each liquid-holding compartment is connected through an outlet port into fluid communication with the flow channel of the hand-held spraying apparatus.
A liquid reservoir of a hand-held, air-assisted spray apparatus is characterized by a plurality (i.e., two or more) of liquid-holding compartments. Each liquid-holding compartment is connected through an outlet port into fluid communication with the flow channel of the hand-held spraying apparatus. The liquid-holding compartments are isolated from fluid communication with each other such that a liquid introduced into one of the compartments is held apart from a liquid introduced into the other compartment. A rotatable element is associated with each liquid-holding compartment. Each rotatable element has a predetermined displacement. The rotatable elements are coupled together for rotation by a common shaft, so that, in use, the relative volumes of liquids dispensed from the respective liquid-holding compartments into the flow channel remain in a predetermined ratio regardless of the rate at which the liquids flow from their respective compartments. The component formulations of a multi-component coating such as that based on hydroxyl/isocyanate chemistry for automotive clearcoats are kept isolated until the actual time of application.
대표청구항▼
What is claimed is: 1. A hand-held, air-assisted spraying apparatus for applying a liquid coating formulation of the type that requires at least a first and a second component be combined to produce a coating on a surface, at least one of the components including a catalyst therein, the spraying ap
What is claimed is: 1. A hand-held, air-assisted spraying apparatus for applying a liquid coating formulation of the type that requires at least a first and a second component be combined to produce a coating on a surface, at least one of the components including a catalyst therein, the spraying apparatus comprising: a spray housing having a flow channel extending therethrough; a reservoir assembly mounted to the spray housing, the reservoir assembly having at least a first and a second liquid-holding compartment, each liquid-holding compartment being connected through an outlet port into fluid communication with the flow channel, each liquid-holding compartment being isolated from fluid communication with the other liquid-holding compartment, a first and a second rotatable element respectively disposed in fluid communication with each liquid-holding compartment, each rotatable element having a predetermined displacement such that, upon a full rotation thereof, predetermined equal volumes of liquid are dispensed through the outlet port from its associated liquid-holding compartment, wherein the first and the second rotatable elements are mechanically connected through a speed-reducing arrangement so that the rotatable elements rotate at different rotational speeds, such that in use, the relative amounts of liquids dispensed from the respective liquid-holding compartments into the flow channel are in a predetermined ratio regardless of the rate at which the liquids flow from their respective liquid-holding compartments. 2. The spraying apparatus of claim 1 further comprising a static mixer disposed between the first and a second rotatable elements and the flow channel. 3. The spraying apparatus of claim 1 wherein each compartment comprises an upper cup portion and a lower neck portion, the upper cup portion of each compartment being removably connected to its associated neck portion. 4. A hand-held air-assisted the spraying apparatus for applying a liquid coating formulation of the type that requires at least a first and a second component be combined to produce a coating on a surface, at least one of the components including a catalyst therein, the spraying apparatus comprising a spray housing having a flow channel extending therethrough; a reservoir assembly mounted to the spray housing, the reservoir assembly having at least a first and a second liquid-holding compartment, each liquid-holding compartment being connected through an outlet port into fluid communication with the flow channel, each liquid-holding compartment being isolated from fluid communication with the other liquid-holding compartment, a first and a second rotatable element respectively associated of each liquid-holding compartment, each rotatable element having a predetermined displacement such that upon a full rotation thereof, a predetermined different volumes of liquid are dispensed through the outlet port from its associated liquid-holding compartment, the first and a second rotatable elements being coupled together by a common shaft for rotation at the same rotational speed such that, in use, the relative amounts of liquids dispensed from the respective liquid-holding compartments into the flow channel are in a predetermined ratio regardless of the rate at which the liquids flow from their respective liquid-holding compartments, and, a latch member which, when asserted, prevents rotation of the common shaft to which each of the rotatable element is connected. 5. The spraying apparatus of claim 4 further comprising a static mixer disposed between the first and the second rotatable elements and the flow channel. 6. The spraying apparatus of claim 4 wherein each compartment comprises an upper cup portion and a lower neck portion, the upper cup portion of each compartment being removably connected to its associated neck portion. 7. A reservoir assembly attachment for a hand-held, air-assisted spraying apparatus of the type having a spray housing having a flow channel extending therethrough, the attachment being removably connectable to the spray housing, the attachment comprising: a first and a second liquid-holding compartment, each liquid-holding compartment being connected through an outlet port into fluid communication with the flow channel, each liquid-holding compartment being isolated from fluid communication with the other liquid-holding compartment, a first and a second rotatable element respectively disposed in fluid communication with each liquid-holding compartment, each rotatable element having a predetermined displacement such that, upon a full rotation thereof, predetermined equal volumes of liquid are dispensed through the outlet port from its associated liquid-holding compartment, wherein the first and the second rotatable elements are mechanically connected through a speed-reducing arrangement so that the rotatable elements rotate at different rotational speeds, such that, in use, the relative amounts of liquids dispensed from the respective liquid-holding compartments into the flow channel are in a predetermined ratio regardless of the rate at which the liquids flow from their respective liquid-holding compartments. 8. The reservoir assembly attachment of claim 7 further comprising a static mixer disposed between the first and a second rotatable elements and the flow channel. 9. The reservoir assembly attachment of claim 7 wherein each compartment comprises an upper cup portion and a lower neck portion, the upper cup portion of each compartment being removably connected to its associated neck portion. 10. A reservoir assembly attachment for a hand-held, air-assisted spraying apparatus of the type having a spray housing having a flow channel extending therethrough, the attachment being removably connectable to the spray housing, the attachment comprising a spray housing having a flow channel extending therethrough; a reservoir assembly mounted to the spray housing, the reservoir assembly having at least a first and a second liquid-holding compartment, each liquid-holding compartment being connected through an outlet port into fluid communication with the flow channel, each liquid-holding compartment being isolated from fluid communication with the other liquid-holding compartment, a first and a second rotatable element respectively associated of each liquid-holding compartment, each rotatable element having a predetermined displacement such that, upon a full rotation thereof, a predetermined different volumes of liquid are dispensed through the outlet port from its associated liquid-holding compartment, the first and a second rotatable elements being coupled together by a common shaft for rotation at the same rotational speed such that, in use, the relative amounts of liquids dispensed from the respective liquid-holding compartments into the flow channel are in a predetermined ratio regardless of the rate at which the liquids flow from their respective liquid-holding compartments and, a latch member which, when asserted, prevents rotation of the common shaft to which each of the rotatable element is connected. 11. The spraying apparatus of claim 10 further comprising a static mixer disposed between the first and the second rotatable elements and the flow channel. 12. The spraying apparatus of claim 10 wherein each compartment comprises an upper cup portion and a lower neck portion, the upper cup portion of each compartment being removably connected to its associated neck portion. 13. A method for applying a liquid coating formulation using a hand-held, air-assisted spray apparatus having a flow channel extending therethrough, the flow channel terminating in a nozzle, the liquid coating formulation being of the type that requires at least two reactive component formulations to be combined to produce a coating on a surface, the method comprising the steps of: (a) with the nozzle closed, charging a first component formulation and a second component formulation into a respective first and second liquid-holding compartment, at least one of the component formulations having a predetermined amount of a catalyst solution therein, each liquid-holding compartment being connected through an outlet port into fluid communication with the flow channel, each liquid-holding compartment being isolated from fluid communication with the other liquid-holding compartment, each liquid-holding compartment having a rotatable dispensing element respectively associated therewith, the rotatable dispensing elements being coupled together for rotation one with the other, each rotatable dispensing element having a predetermined displacement such that, upon a full rotation thereof, a predetermined volume of liquid is dispensed from its associated liquid-holding compartment; and (b) passing air through the spray apparatus and simultaneously opening the nozzle thereby allowing liquid to flow from the compartments into the flow channel and rotating the rotatable dispensing elements, so that, in use, the relative amounts of liquids dispensed from the respective liquid-holding compartments into the flow channel are in a predetermined ratio regardless of the rate at which the liquids flow from their respective liquid-holding compartments. 14. The method of claim 13 wherein the coating formulation comprises polymerizable compounds. 15. The method of claim 14 wherein the coating formulation comprises polymerizable oligimers. 16. The method of claim 15 wherein the polymerizable oligimers comprise polyol oligimers with multiple hydroxl end groups. 17. The method of claim 14 wherein the coating formulation comprises polymerizable organic molecules having isocyanate functional groups. 18. The method of claim 17 wherein the polymerizable organic molecules are trimers of hexamethylene di-isocyanate. 19. The method of claim 13 wherein the polymerization catalyst solution includes dibutyl tin di-laurate.
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이 특허에 인용된 특허 (4)
Farrey Merlyn F. (Akron OH), Dispensing apparatus.
Bernard Jean-Marie,FRX ; Frances Jean-Marc,FRX ; Jousseaume Bernard,FRX ; Noiret Nicholas,FRX ; Pereyre Michel,FRX, Use of tin derivatives as latent polycondensation catalysts, and premix containing them.
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