Claims
- 1. A biochemical reaction analyzing apparatus comprising a reaction cup, a suction head for carrying said reaction cup, means for reducing the pressure in said suction head, and means for increasing the pressure in said suction head; wherein said cup has a hollowed portion providing a reaction cell for biochemical reactions and a top face covered and sealed with a sheet, said suction head being engagable with the sealed top face of the cup, said suction head further comprising: an annular elastic suction pad at its lower end which engages with the top face of the cup to engage with the periphery of the top face of the cup, and a head body provided with an air suction and discharge opening formed inside said suction pad, said head body defining a cylindrical cavity at its lower end and an air passage at its upper end, said cylindrical cavity having a diameter which is substantially equal to a diameter of said opening, said air passage having a diameter which is smaller than the diameters of said cylindrical cavity and said opening, said cylindrical cavity extending up from said opening in a vertical direction and having a length in the vertical direction sufficient to permit a stream of discharged air from said air passage to be guided downward onto the reaction cup through an entire cross-sectional area of said opening;
- wherein the length of said cylindrical cavity is equal to or greater than half the diameter of the air suction and discharge opening.
- 2. An apparatus according to claim 1, wherein a plurality of circumferential grooves are formed on an inner wall of said head body provided with said cylindrical cavity.
- 3. An apparatus according to claim 1, wherein a weight engageable with said top face of said reaction cup is provided within said cylindrical cavity, said weight being freely movable in the vertical direction in said cylindrical cavity.
- 4. A suction head according to claim 3, wherein the weight is exerted downwardly by a spring.
Priority Claims (1)
Number |
Date |
Country |
Kind |
61-134446 |
Jun 1986 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 146,827, filed Jan. 11, 1988, now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (6)
Number |
Date |
Country |
3325207 |
Jan 1985 |
DEX |
48-20790 |
Jun 1973 |
JPX |
49-52978 |
May 1974 |
JPX |
60-45691 |
Mar 1985 |
JPX |
61-20287 |
Feb 1986 |
JPX |
61-99434 |
Jun 1986 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
146827 |
Jan 1988 |
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