IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0485657
(2002-08-05)
|
우선권정보 |
DE-201 12 891 U(2001-08-03) |
국제출원번호 |
PCT/EP02/008728
(2002-08-05)
|
§371/§102 date |
20040830
(20040830)
|
국제공개번호 |
WO03/015934
(2003-02-27)
|
발명자
/ 주소 |
- Burmester,Thomas
- Luebbecke,Kai
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
5 |
초록
▼
A device for dispensing fluid material onto a substrate including a base body with a flow channel for receiving the fluid material and a movable valve body positioned in the flow channel. The valve body is movable in a downstream direction into an open position to release a flow of the fluid materia
A device for dispensing fluid material onto a substrate including a base body with a flow channel for receiving the fluid material and a movable valve body positioned in the flow channel. The valve body is movable in a downstream direction into an open position to release a flow of the fluid material into the flow channel and is movable in an upstream direction into a closed position to interrupt the flow of the fluid material into the flow channel. A drive device moves the valve body between the open position and the closed position. A cylindrical chamber is positioned in the flow channel and the valve body includes a piston movable within the cylindrical chamber. The piston is sealed within the cylindrical chamber in such a way that when the piston moves in a first direction within the cylindrical chamber, the fluid material is displaced from the flow channel and when the piston is moved in a second direction opposite to the first direction, the fluid material is drawn into the flow channel.
대표청구항
▼
The invention claimed is: 1. A device for dispensing fluid material onto a substrate, comprising: a base body including a flow channel for receiving the fluid material, a movable valve body positioned in said flow channel, said valve body movable in a downstream direction into an open position to r
The invention claimed is: 1. A device for dispensing fluid material onto a substrate, comprising: a base body including a flow channel for receiving the fluid material, a movable valve body positioned in said flow channel, said valve body movable in a downstream direction into an open position to release a flow of the fluid material into said flow channel, and movable in an upstream direction into a closed position to interrupt the flow of the fluid material into said flow channel, a drive device configured to move said valve body between the open position and the closed position, a cylindrical chamber in said flow channel, said valve body including a piston movable within said cylindrical chamber, said piston configured for movement in at least the upstream direction after being sealed within said cylindrical chamber so that when said piston moves in a first direction within said cylindrical chamber, the fluid material is displaced from said flow channel and when said piston is moved in a second direction opposite to said first direction, the fluid material is drawn into said flow channel. 2. The device of claim 1, wherein said piston is positioned downstream from said cylindrical chamber in the open position and is positioned in said cylindrical chamber in the closed position, and the movement of the piston from the open position to the closed position draws the fluid material into said flow channel. 3. The device of claim 1, further comprising a valve seat configured to engage with a portion of said valve body positioned upstream from said piston when said valve body is in the closed position. 4. The device of claim 1, wherein said valve body further comprises a guide section spaced from said piston and said flow channel includes guide surfaces, said guide section contacting said guide surfaces for guiding said valve body laterally as said valve body moves between the open and closed positions. 5. The device of claim 4, wherein said guide section further comprises a triangular cross section, and said guide surfaces further comprise portions of a cylinder. 6. The device of claim 1, further comprising a tapered section on said valve body positioned downstream from said piston. 7. The device of claim 1, further comprising a sleeve, said cylindrical chamber and said guide surfaces being formed in said sleeve. 8. The device of claim 1, wherein said drive device further comprises a second piston coupled to said valve body and operative to move said valve body between the open and closed positions. 9. A device for dispensing fluid material onto a substrate, comprising: a base body including a flow channel for receiving the fluid material, a movable valve body positioned in said flow channel, said valve body movable in a downstream direction into an open position to release a flow of the fluid material into said flow channel, and movable in an upstream direction into a closed position to interrupt the flow of the fluid material into said flow channel, a drive device configured to move said valve body between the open position and the closed position, and a cylindrical chamber in said flow channel, said valve body comprising: a piston movable within said cylindrical chamber, said piston sealed within said cylindrical chamber in such a way that when said piston moves in a first direction within said cylindrical chamber, the fluid material is displaced from said flow channel and when said piston is moved in a second direction opposite to said first direction, the fluid material is drawn into said flow channel, a guide section spaced from said piston and having a triangular cross section, and guide surfaces in said flow channel configured as portions of a cylinder, said guide section contacting said guide surfaces for guiding said valve body laterally as said valve body moves between the open and closed positions. 10. A device for dispensing fluid material onto a substrate, comprising: a base body including a flow channel for receiving the fluid material, a movable valve body positioned in said flow channel, said valve body movable in a downstream direction into an open position to release a flow of the fluid material into said flow channel, and movable in an upstream direction into a closed position to interrupt the flow of the fluid material into said flow channel, a drive device configured to move said valve body between the open position and the closed position, a portion of said flow channel defining a cylindrical chamber defined by a wall and a valve seat positioned upstream from said cylindrical chamber, said valve body including a piston section movable within said cylindrical chamber and adapted to seal with said wall, and a contact surface positioned upstream of said piston section and adapted to engage with said valve seat, wherein said piston section seals with said wall of said cylindrical chamber before said contact surface engages said valve seat as the valve body is moved in the upstream direction and into the closed position, the fluid material being drawn into said flow channel when the valve body is moved in the upstream direction.
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