Pumps – Expansible chamber type – Valved piston
Reexamination Certificate
2000-03-15
2001-11-13
Walberg, Teresa (Department: 3742)
Pumps
Expansible chamber type
Valved piston
Reexamination Certificate
active
06315533
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to the mechanical transfer of fluids and more specifically to a vibratory pump used to transfer fluid.
BACKGROUND OF THE INVENTION
When transferring fluid from a container holding the fluid, a pump of some type is normally used. The pump creates a vacuum that draws the fluid from the container and directs it to a desired location. A problem that occurs when using these conventional pumps is that, when the pump is turned off, there is a residual pressure remaining in the pump that forces a small amount of additional liquid out of the pump. If an individual is attempting to fill a container with the liquid, this additional liquid usually spills over the top of the container and is wasted. Therefore, it is desirable to develop a pump that eliminates any residual pressure in the pump when the pump is turned off to avoid losing any of the liquid being pumped.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a vibratory pump that eliminates any residual pressure within the pump when the pump is switched off to avoid excess fluid loss.
It is a further object of the invention to provide a vibratory pump with the aforementioned feature that is inexpensive and simple in constructions.
The present invention is a vibratory pump apparatus that allows an individual to pump liquids to a desired location without encountering any problems caused by residual pressure normally remaining in prior art liquid pumping devices after the device has been switched off. Also, due to the use of inert materials in forming the apparatus, the apparatus may be used to pump caustic liquids, such as acids, without damaging the apparatus.
REFERENCES:
patent: 76318 (1868-03-01), Fisher
patent: 2634684 (1953-04-01), Alvarez et al.
patent: 2732806 (1956-01-01), Alvarez et al.
patent: 4147476 (1979-04-01), Warren
patent: 4815948 (1989-03-01), Aurelio
patent: 5165871 (1992-11-01), Iwabuchi
patent: 706573 (1974-09-01), None
patent: 877146 (1981-07-01), None
patent: 879051 (1981-07-01), None
patent: 918575 (1981-12-01), None
patent: 989166 (1982-09-01), None
patent: 1090930 (1984-01-01), None
patent: 1222905 (1985-12-01), None
patent: 1642095 (1990-12-01), None
patent: 1664387 (1991-07-01), None
Lishanski Grigori
Lishanski Oleg
Boyle Fredrickson Newholm Stein & Gratz S.C.
Patel Vinod D.
Walberg Teresa
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