IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0799613
(2004-03-15)
|
등록번호 |
US-7270789
(2007-09-18)
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발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
4 |
초록
▼
In a preferred embodiment, a pipettor head, including: a body; one or more solenoid valves disposed in the body; each one or more solenoid valves having an outlet at a lower end and an inlet at an upper end; each one or more solenoid valves having an outlet attached to a dispensing passageway; each
In a preferred embodiment, a pipettor head, including: a body; one or more solenoid valves disposed in the body; each one or more solenoid valves having an outlet at a lower end and an inlet at an upper end; each one or more solenoid valves having an outlet attached to a dispensing passageway; each one or more solenoid valves having its inlet attached to a standpipe; and the standpipe having an open top communicating with an interior of a closed vacuum/pressure chamber defined in the pipettor head, the closed vacuum/pressure chamber being arranged such that vacuum or pressure may be selectively applied to the closed vacuum/pressure chamber. A method of using the pipettor head is also provided.
대표청구항
▼
The invention claimed is: 1. A pipettor head, comprising: (a) a body; (b) one or more solenoid valves disposed in said body; (c) each said one or more solenoid valves having an outlet at a lower end and an inlet at an upper end; (d) each said one or more solenoid valves having said outlet attached
The invention claimed is: 1. A pipettor head, comprising: (a) a body; (b) one or more solenoid valves disposed in said body; (c) each said one or more solenoid valves having an outlet at a lower end and an inlet at an upper end; (d) each said one or more solenoid valves having said outlet attached to a dispensing passageway; (e) each said one or more solenoid valves having said inlet attached to a standpipe; and (f) said standpipe having an open top communicating with an interior of a closed vacuum/pressure chamber defined in said pipettor head, said closed vacuum/pressure chamber being arranged such that vacuum or pressure may be selectively applied to said closed vacuum/pressure chamber. 2. A pipettor head, as defined in claim 1, wherein: said one or more solenoid valves comprise at least two valves each connected to a standpipe and said standpipes are arranged such that overflow from one said standpipe cannot enter another said standpipe. 3. A pipettor head, as defined in claim 1, wherein: said dispensing passageway terminates at its distal end in an orifice having a diameter smaller than said dispensing passageway. 4. A pipettor head, as defined in claim 2, wherein: said orifice has a diameter from about 0.003 to about 0.004-inch. 5. A pipettor head, as defined in claim 1, wherein: pressure above atmospheric pressure is applied to said vacuum/pressure chamber to assist in dispensing liquid from said standpipe. 6. A pipettor head, as defined in claim 1, wherein: a vacuum below atmospheric pressure is applied to said vacuum/pressure chamber to assist in aspirating liquid from said standpipe. 7. A pipettor head, as defined in claim 6, wherein: a higher vacuum, i.e., lower negative pressure, than is used to assist in aspirating is applied to said vacuum/pressure chamber to assist in washing said orifice, said dispensing passageway, said solenoid valve, said standpipe, and any interconnecting passageways. 8. A method of using a pipettor head, comprising: providing said pipettor head having: a body; one or more solenoid valves disposed in said body; each said one or more solenoid valves having an outlet at a lower end and an inlet at an upper end; each said one or more solenoid valves having said outlet attached to a dispensing passageway; each said one or more solenoid valves having said inlet attached to a standpipe; and said standpipe having an open top communicating with an interior of a closed vacuum/pressure chamber defined in said pipettor head, said closed vacuum/pressure chamber being arranged such that vacuum or pressure may be selectively applied to said closed vacuum/pressure chamber; said method comprising: applying pressure to said vacuum/pressure chamber to assist in dispensing liquid from said standpipe or applying vacuum to assist in filling said standpipe. 9. A method of using a pipettor head, as defined in claim 8, further comprising: providing said one or more solenoid valves comprising at least two valves each connected to a standpipe and said standpipes are arranged such that overflow from one said standpipe cannot enter another said standpipe. 10. A method of using a pipettor head, as defined in claim 8, further comprising: providing said dispensing passageway terminating at its distal end in an orifice having a diameter smaller than said dispensing passageway. 11. A method of using a pipettor head, as defined in claim 10, further comprising: providing said orifice having a diameter from about 0.003 to about 0.004-inch. 12. A method of using a pipettor head, as defined in claim 8, further comprising: applying pressure above atmospheric pressure to said vacuum/pressure chamber to assist in dispensing liquid from said standpipe. 13. A method of using a pipettor head, as defined in claim 8, further comprising applying vacuum below atmospheric pressure to said vacuum/pressure chamber to assist in aspirating liquid to fill said standpipe. 14. A method of using a pipettor head, as defined in claim 8, further comprising: applying vacuum to said vacuum/pressure chamber to assist in washing, in order, said orifice, said dispensing passageway, said solenoid valve, and said standpipe.
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