Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1995-04-28
1996-04-02
Raevis, Robert
Measuring and testing
Sampler, sample handling, etc.
Capture device
175 21, E21B 4908
Patent
active
055030319
ABSTRACT:
A ground water sampling device has an elongated cylindrical hollow housing positioned at a desired depth below the ground surface. The housing has an opening formed at its lower end and an inner surface with an annular groove disposed adjacent the opening. The device has an elongated screen capable of being telescopically received in the housing and capable of being deployed through the opening of the housing. The screen has an annular slot formed on its outer surface adjacent its upper end. A resilient locking collar is compressed inwardly and received in the slot of the screen when the screen is received in the housing prior to its deployment. The collar expands outwardly into the groove of the housing when the slot of screen is longitudinally aligned with the groove during deployment of the screen. The collar in its expanded position is disposed in both the slot and the groove so that the screen is locked in its deployed position.
REFERENCES:
patent: 4028248 (1977-06-01), Murauskas et al.
patent: 4807707 (1989-02-01), Handley et al.
patent: 5146998 (1992-09-01), Cordry et al.
patent: 5327981 (1994-07-01), Morgan
Pp. 5.1-5.12 of "Geoprobe Systems 1993-94 Equipment and Tools Catalog," and the ground water sampling tools depicted therein which were published, in public use or on sale in the U.S. prior to Apr. 28, 1994.
Christy Thomas M.
Kejr Melvin P.
Scott Gregory H.
Kejr Engineering, Inc.
Raevis Robert
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