Fluid sampling pump

Details Fluid sampling pump Fluid sampling pump

1991-11-27

1992-10-06

Smith, Leonard E.

Pumps

Motor driven

Fluid motor

417570, F04B 3910

Patent

active

051526786

ABSTRACT:
A pump for sampling fluids from a pipe line has a very high volumetric efficiency. The pump has a plunger that substantially completely displaces the volume of the cavity within which it works. To prevent flow of the fluid from the pipe line to the sampling container when the pipe line pressure is higher than the sampling container, a floating plunger liner has a passage open to the pipe line pressure. The pipe line pressure will force the liner against the outlet valve if the pipe line pressure is higher than the collecting vessel pressure. When the plunger evacuates the cavity the pressure in the cavity will be greater than the pipe line pressure and the outlet pressure and will force the plunger liner downward to open the outlet valve to permit flow of the fluid from the cavity through the outlet to the collecting vessel. If the pressure is lower in the cavity than either the pipe line or the collecting vessel, there will be no flow from the collecting vessel but only flow from the pipe line.

REFERENCES:
patent: 2122020 (1938-06-01), Barks
patent: 3312178 (1967-04-01), Rotter et al.
patent: 3995966 (1976-12-01), Blancha
patent: 4137017 (1979-01-01), Lonardo
patent: 4452573 (1984-06-01), Samuel
patent: 4470775 (1984-09-01), Lonardo
patent: 4531895 (1985-07-01), Zeck
patent: 4645431 (1987-02-01), Spencer

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