Device and system for dispensing or aspirating/dispensing...

Details Device and system for dispensing or aspirating/dispensing... Device and system for dispensing or aspirating/dispensing...

2006-06-06

2006-06-06

Nicolas, Frederick C. (Department: 3754)

Dispensing

Motor operated outlet element

C222S135000

Reexamination Certificate

active

07055723

ABSTRACT:
The invention relates to a device (1) for dispensing or aspirating/dispensing liquid samples, including a pump (2) and a micro-ejection device (3), the micro-ejection device (3) having a pulse generator (4) with a chamber (5). The pulse generator (4) is used to produce pressure waves in the liquid in order to cause the samples of a liquid to be dispensed. The micro-ejection device (3) also comprises an end piece (6) and a liquid line (7) which connects the pulse generator (4) to the end piece (6) the pulse generator comprises a micro-actuator (10) which is configured to function in the same direction as that in which the pressure wave leaves the chamber (5). The inventive devices are characterised in that the chamber (5), in the area of the end facing away from the end piece (6), or the corresponding connecting element (14) has a narrowed section (16) which restricts any expansion of the pressure waves in the direction of the pump (2). The invention also relates to systems with multiple devices of this type.

REFERENCES:
patent: 3329964 (1967-07-01), Mutschler et al.
patent: 5356034 (1994-10-01), Schlumberger
patent: 5405050 (1995-04-01), Walsh
patent: 6063339 (2000-05-01), Tisone et al.
patent: 6250515 (2001-06-01), Newbold et al.
patent: 6371339 (2002-04-01), White et al.
patent: 6467700 (2002-10-01), Vann et al.
patent: 6915928 (2005-07-01), Brooks
patent: 1093856 (2001-04-01), None
patent: 09327628 (1997-12-01), None
patent: WO 00/01798 (2000-01-01), None

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