IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0745385
(2003-12-23)
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발명자
/ 주소 |
- Shanklin, Donald
- Englhard, Ronald F.
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출원인 / 주소 |
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대리인 / 주소 |
Knobbe, Martens, Olson &
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인용정보 |
피인용 횟수 :
10 인용 특허 :
56 |
초록
▼
The present invention relates to a chemical sprayer that includes a sprayer head assembly and a container. The container defines a cavity for storing a chemical to be sprayed. The sprayer head assembly includes a chemical passage, a carrier fluid passage, a vent passage, a valve chamber and a valve.
The present invention relates to a chemical sprayer that includes a sprayer head assembly and a container. The container defines a cavity for storing a chemical to be sprayed. The sprayer head assembly includes a chemical passage, a carrier fluid passage, a vent passage, a valve chamber and a valve. The chemical passage is communication with the cavity. The carrier fluid passage is in communication with a carrier fluid source. Both the carrier fluid and chemical passages are in communication with the valve chamber. The valve is moveably positioned within the valve chamber and defines at least partially a first passage and a second passage. The first passage is configured so as to be in communication with the chemical passage when the valve is in an open position. The second passage is configured so as to be in communication with the carrier fluid passage when the valve is in the open position. The first and second passages are also configured so as to not be in communication with the chemical and carrier fluid passages when said valve is in a closed position. The valve also includes one or more seal portions positioned on the valve so as to block both the chemical and the carrier fluid passages when said valve is in the closed position. The sealing portions also preferably blocks a vent passage when the valve in the closed position. The second passage also preferably forms at least in part an outlet of the sprayer head assembly. A suction generating surface is also preferably defined by the valve.
대표청구항
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1. A chemical sprayer comprising a sprayer head assembly and a container that defines a cavity for storing a chemical to be sprayed; said sprayer head assembly comprising:a chemical passage that is in communication with said cavity, a lower portion of said chemical passage being defined at least in
1. A chemical sprayer comprising a sprayer head assembly and a container that defines a cavity for storing a chemical to be sprayed; said sprayer head assembly comprising:a chemical passage that is in communication with said cavity, a lower portion of said chemical passage being defined at least in part by an elongated tubular member that extends into said cavity; a carrier fluid passage that is in communication with a carrier fluid source; a valve that at least partially defines a first passage and a second passage, said valve being moveable between an open position and a closed position, said valve configured such that when said valve is in said open position said first passage is in communication with said lower portion of said chemical passage and said second passage is in communication with said carrier fluid passage, said valve also configured such that when said valve is in said closed position said first and second passages are not in communication with said carrier fluid passage and said lower portion of said chemical passage, said valve comprising at least one sealing portion that is positioned so as to block both the chemical and the carrier fluid passages when said valve is in said closed position such that said lower portion of said chemical passage is no longer in communication with said first passage; a vent passage that is in communication with said cavity, said valve being configured such that when said valve is in said closed position a surface of said at least one sealing portion prevents said cavity from being in communication with an atmospheric pressure source through said vent passage; and the valve comprising a handle that forms a gripping surface, the gripping surface of the handle being configured such that there is no relative movement between the gripping surface and the at least one sealing portion as the valve is moved between the first position and the second position. 2. A chemical sprayer head assembly as in claim 1, wherein said first passage terminates at a suction generating surface that is formed by said valve, said suction generating surface positioned and configured such that the flow of carrier fluid through said second passage and over said suction generating surface creates a suction force which draws chemical through said chemical passage to said suction generating surface.3. A chemical sprayer head assembly as in claim 2, wherein said valve includes a sealing wall that extends across said carrier fluid passage, said one or more sealing portions are located at least in part on said sealing wall and said valve further includes a bracing wall that is coupled to said sealing wall at least two points that are on opposite sides of said carrier fluid passage.4. A chemical sprayer head assembly as in claim 1, wherein said suction generating surface is defined at least in part by said second passage.5. A chemical sprayer head assembly as in claim 1, wherein said suction generating surface is upwardly inclined when said valve is in said open position.6. A chemical sprayer head assembly as in claim 1, wherein said outlet includes divergent walls fanned in part by said valve.7. A chemical sprayer head assembly as in claim 1, wherein said valve includes a sealing wall that extends across said carrier fluid passage, said one or more sealing portions are located at least in part on said sealing wall and said valve further includes a bracing wall that is coupled to said sealing wall at least two points that are on opposite sides of said carrier fluid passage.8. A chemical sprayer comprising a sprayer head assembly and a container that defines a cavity for storing a chemical to be sprayed; said sprayer head assembly comprising:a chemical passage that is in communication with said cavity, a lower portion of said chemical passage being defined at least in part by an elongated tubular member that extends into said cavity; a carrier fluid passage that is in communication with a carrier fluid source; a valve chamber that is in communication with said chemical and carrier fluid passages; a vent passage that is in communication with said cavity and is in communication with said valve chamber through a vent opening; a valve positioned for rotation between an open position and a closed position within said valve chamber, said valve at least partially defining a first passage and a second passage, said first passage configured so as to be in communication with said lower portion of said chemical passage when said valve is in said open position, said second passage configured so as to be in communication with said carrier fluid passage when said valve is in said open position, said first and second passages also configured so as to not be in communication with said carrier fluid passage and said lower portion of said chemical passage when said valve is in said closed position, at least one sealing portion that is positioned on said valve so as to block both the chemical and the carrier fluid passages when said valve is in said closed position such that said lower portion of said chemical passage is no longer in communication With said first passage; and said valve being configured such that as said valve is rotated to said closed position said valve provides a radial force that is sufficient to seal a mouth of said vent opening. 9. A chemical sprayer head assembly as in claim 8, wherein said first passage terminates at a suction generating surface that is formed by said valve, said suction generating surface positioned and configured such that the flow of carrier fluid through said second passage over said suction generating surface creates a suction force which draws chemical through said chemical passage to said suction generating surface.10. A chemical sprayer head assembly as in claim 8, wherein said suction generating surface is defined at least in part by said second passages.11. A chemical sprayer head assembly as in claim 8, wherein said suction generating surface is upwardly inclined when said valve is in said open position.12. A chemical sprayer head assembly as in claim 8, wherein said outlet includes divergent walls formed in part by said valve.13. A chemical sprayer comprising a sprayer head assembly and a container that defines a cavity for storing a chemical to be sprayed; said sprayer head assembly comprising:a chemical passage that is in communication with said cavity, a lower portion of said chemical passage being defined at least in part by an elongated tubular member that extends into said cavity; a carrier fluid passage that is in communication with a carrier fluid source; a bore that is in communication with said chemical and carrier fluid passages; a valve positioned, at least partially, for rotation between an open position and a closed position within said bore, said valve at least partially defining a first passage and a second passage, said first passage configured so as to be in communication with said lower portion of said chemical passage when said valve is in said open position, said second passage configured so as to be in communication with said carrier fluid passage when said valve is in said open position, said first and second passages also configured so as to not be in communication with said carrier fluid passage and said lower portion of said chemical passage when said valve is in said closed position, a vent passage that is in communication with said cavity and is in communication with said bore through a vent opening; at least one sealing portion that is positioned on said valve so as to block both the chemical and the carrier fluid passages when said valve is in said closed position such that said lower portion of said chemical passage is no longer in communication with said first passage; and said valve being configured such that as said valve is rotated to said closed position said valve provides a radial force that is sufficient to seal a mouth of said vent opening. 14. A chemical sprayer head assembly as in claim 13, wherein said first passage terminates at a suction generating surface that is formed by said valve, said suction generating surface positioned and configured such that the flow of carrier fluid through said second passage over said suction generating surface creates a suction force which draws chemical through said chemical passage to said suction generating surface.15. A chemical sprayer head assembly as in claim 13, wherein said suction generating surface is defined at least in part by said second passage.16. A chemical sprayer head assembly as in claim 13, wherein said suction generating surface is upwardly inclined when said valve is in said open position.17. A chemical sprayer head assembly as in claim 13, wherein said outlet includes divergent walls formed in part by said valve.18. A chemical sprayer head assembly as in claim 13, wherein said valve includes a sealing wall that extends across said carrier fluid passage, said one or more sealing portions are located at least in part on said sealing wall and said valve further includes a bracing wall that is coupled to said sealing wall at least two points that are on opposite sides of said carrier fluid passage.
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