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US 6,669,255 B2Granted
Apparatus for inhibiting contamination of sample during bailer emptying
OwnerDavid W. Prattinventor
Life of this patent
Estimating the term…
Abstract
A bailer collects a column of liquid fluid of predetermined height from a body of liquid fluid at a predetermined depth. The bailer is emptied without contaminating the collected liquid fluid with oxygen. The bailer has two check valves spaced apart from one another by a preselected distance so that it can collect liquid fluid at a predetermined depth below the surface of the body of liquid fluid. A vent opening is formed between the first check valve and the second check valve to enable the bailer to be emptied in the substantial absence of oxygen contamination.
Claims5
A bailer, comprising:
- a cylindrical main body having a hollow interior adapted to hold a quantity of liquid fluid;
- a first check valve means connected to a leading end of said bailer;
- a second check valve means disposed in spaced relation to said first check valve means;
- said second check valve means positioned in said hallow interior near a trailing end of said bailer;
- a vent opening formed in said cylindrical main body at a point between said first and second check valve means;
- whereby a column of liquid fluid is contained within said hollow interior when said bailer is lowered into a body of liquid fluid, said column having a height equal to the spacing between said first and second check valve means;
- whereby said column of liquid fluid is collected by inserting said bailer to a predetermined depth in said body of liquid fluid and retracting said bailer from said body of liquid fluid.
4 more elements
A bailer, comprising:
- a cylindrical main body having a hollow interior adapted to hold a quantity of liquid fluid;
- a first check valve means connected to a leading end of said bailer;
- a second check valve means disposed in spaced relation to said first check valve means;
- said second check valve means positioned in said hollow interior near a tailing end of said bailer;
- said hollow interior adapted to bold a column of liquid fluid, said column having a height equal to the spacing between said first and second check valve means;
- a vent opening formed in said cylindrical main body at a point between said first and second check valve means;
- whereby said column of liquid fluid is collected by inserting said bailer to a predetermined dept and by retracting said bailer;
- and
- whereby said vent opening enables said liquid fluid to flow from said hollow interior when said first check valve is unseated.
6 more elements
A bailer, comprising:
- a cylindrical main body having a hollow interior adapted to bold a quantity of liquid fluid;
- a first check valve means connected to a leading end of said bailer;
- a second check valve means positioned in said hollow interior in trailing relation to said first check valve means;
- said second check valve means including a valve seat;
- said valve seat including a cylindrical wall that is press fit into said hollow interior of said cylindrical main body to maintain said second check valve means in position;
- a flat formed in said cylindrical wall of said valve seat;
- a vent opening formed in said cylindrical main body of said bailer in radially spaced relation to said flat;
- a column of liquid fluid being captured within said hollow interior between said first and second check valve means when said bailer is lowered into a body of liquid fluid and retrieved therefrom;
- said bailer being emptied by opening said first check valve means to allow liquid fluid to drain from said leading end of said bailer;
- said vent opening substantially preventing oxygen contamination of said liquid fluid as said liquid fluid flows from said leading end of said bailer.
7 more elements
Dependencies are inferred from the claim text.