Measuring and testing – Measuring vessel
Patent
1975-09-02
1976-12-07
Cohan, Alan
Measuring and testing
Measuring vessel
137199, B01L 302, G01N 114
Patent
active
039954960
ABSTRACT:
The disposable mouth guard prevents the flow of liquid into the user's mouth. It comprises a tubular sleeve of polyethylene formed with a trio of internal flexible or resilient ribs having an annular configuration disposed nearer one end of the sleeve, the first of the three ribs being inset from said one end of the sleeve so that the sleeve can be readily slipped over the suction end of a pipette. The innermost rib is spaced from an internal annular flange that functions as a stop for the end of the pipette. The annular flange also functions as one apertured wall of a chamber containing a fibrous material, more specifically cotton, which expands when liquid is drawn into the chamber, thereby preventing any of the liquid from entering the person's mouth. A second annular flange at the other end of the chamber confines the cotton in a recessed manner from the upper end of the mouth guard. Still another annular flange is formed at the upper end of the sleeve, this being concaved inwardly in order to conform to the user's finger to retain the liquid in the pipette.
REFERENCES:
patent: 2172575 (1939-09-01), Caulfield
patent: 2410552 (1946-11-01), Rosen
patent: 3166940 (1965-01-01), Allisbaugh
patent: 3290946 (1966-12-01), Pursell
patent: 3732734 (1973-05-01), Avakian
patent: 3748909 (1973-07-01), Kuo
Cohan Alan
Peterson Stuart R.
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