Dispensing – Processes of dispensing
Reexamination Certificate
1999-08-20
2001-05-15
Shaver, Kevin (Department: 3754)
Dispensing
Processes of dispensing
C222S639000
Reexamination Certificate
active
06230934
ABSTRACT:
BACKGROUND OF THE INVENTION
The introduction of extremely concentrated detergents (hyper concentrates) into the vehicle washing, part washing and commercial laundry industries has resulted in the need to meter these high cost-per-ounce chemicals with great precision.
The practice in the past has been to draw products directly from shipping containers. This practice prevented the user from determining the level of product remaining and resulted in unused (therefore wasted) product being left in the shipping container after the substitution of a new container.
Injection pumps with precise injection capabilities are in use but no accurate measuring system is available for measuring low volume dosing. Attempts to use laboratory-style measuring cylinders produced grossly inaccurate results.
Previous approaches involved cumbersome use of laboratory measuring cylinders, requiring the removal and replacement of chemical feed lines and the loss of prime in feed lines. Loss of prime in the feed line prevents the injection pump from delivering product and is time-intensive to remediate.
Previous systems also forced the technician to come into physical contact with the material. The previous systems required the pouring of product into the measuring device in order to charge the system prior to measurement.
SUMMARY OF THE INVENTION
The present invention is a system used in measuring very small quantities (i.e., a few milliliters) of hyper-concentrated liquids, e.g., car wash products being delivered through a pumping station into various types of car wash equipment. The benefit is that it provides a means for measuring precisely how much product is being used at any given point in time and is fast and clean.
REFERENCES:
patent: 4331262 (1982-05-01), Snyder et al.
patent: 4597507 (1986-07-01), Rosenblum et al.
patent: 4676403 (1987-06-01), Goudy, Jr. et al.
patent: 5014211 (1991-05-01), Turner et al.
patent: 5200065 (1993-04-01), Sinclair et al.
patent: 6055831 (2000-05-01), Barbe
patent: 404013928 (1992-01-01), None
Cartagena Melvin A
Shaver Kevin
Shell Oil Company
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