Sipper tube with ultrasonic debubbling

• US 5,236,473 A
• Filed: 11/10/1992
• Issued: 08/17/1993
• Est. Priority Date: 11/10/1992
• Status: Expired due to Fees

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Haseler, Simon C., Voll, Edwin J., Kraus, Robert P., Clyde, Stephen K.
• Primary Examiner(s): Hart, Charles
• Application Number:
  US07/973,884
• Time in Patent Office: 280 Days
• Field of Search: 55/15, 55/52, 55/270, 55/277, 73/864.34, 73/864.35, 73/864.73, 422/100, 422/128, 436/54
• US Class Current: 95/30
• CPC Class Codes: G01N 2001/4094 using ultrasound
• CPC Class Codes: G01N 35/1095 for supplying the samples to flow-through analysers for a specific analyser see relevant groups, e.g. under G01N15/00, G01N21/00, G01N27/00, G01N30/00, H01J49/00

Abstract

The invention is a sampling device (4) and method used to remove bubble free samples from a bubble laden liquid. The device includes a power supply (10), a transducer (6) and a sampling probe (5). The power supply (10) converts normal line voltage to 20 kHz electrical energy. This high frequency electrical energy is converted to mechanical vibrations via the piezoelectric transducer (6). These mechanical vibrations propagate down the sampling probe (5) and emanate from the tip of the probe in the form of ultrasonic waves. The ultrasonic waves emanating from the probe tip serve to push away air bubbles from the vicinity of the tip. This allows the removal of a bubble free sample from the bubble laden liquid for further analysis.

Claims

1. A device for extracting a bubble free sample from a liquid containing bubbles comprising:

an ultrasonic transducer;

a sampling tube having two ends mounted at a first end to said transducer and having an inlet port at a second end;

wherein ultrasonic energy from said transducer is transmitted through said sampling tube from the first end to the inlet port whereby when said sampling tube is immersed said liquid containing bubbles, bubbles are forced away from the inlet port; and

extraction means for removing a liquid sample through said sampling tube.

2. The device according to claim 1 wherein said ultrasonic transducer is capable of transmitting energy at a frequency of about 25 kHz to about 40 kHz.

3. A device for extracting a bubble free sample from a liquid containing bubbles comprising:

an ultrasonic transducer;

a sampling tube having two ends mounted at a first end to said transducer and having an inlet port at a second end wherein a baffle is formed at the second end of said sampling tube;

wherein ultrasonic energy from said transducer is transmitted through said sampling tube from the first end to the inlet port whereby when said sampling tube is immersed in said liquid containing bubbles, bubbles are forced away from the inlet port; and

extraction means for removing a liquid sample through said sampling tube.

4. The device according to claim 3 wherein said ultrasonic transducer is capable of transmitting energy

at a frequency of about 25 kHz to about 40 kHz.

5. A method of extracting a bubble-free sample from a bubble laden liquid, comprising:

positioning within the bubble laden liquid a sampling means having an inlet port;

transmitting ultrasonic energy through said sampling means and into the bubble-laden liquid such that bubbles within the liquid are pushed away from the inlet port;

extracting a bubble-free sample from the liquid near the inlet port.

6. The method according to claim 5 further comprising analyzing the particle size of the extracted bubble-free sample.

7. The method according to claim 5 further comprising baffling said liquid at said inlet port.