The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 1994
Filed:
Feb. 25, 1992
Mayur Patel, Sugar Land, TX (US);
Michael T Phillips, Houston, TX (US);
Gary L Cooper, Missouri City, TX (US);
Daniel Emmons, Rosenberg, TX (US);
Nalco Chemical Company, Naperville, IL (US);
Abstract
An apparatus for mixing or blending chemicals includes a dedicated pump for each type of chemical to be blended, such as one pump for water-based chemicals and another pump for oil-based chemicals. Each pump preferably operates in a fast speed when delivering the majority of a particular chemical into a vending vat. When the desired amount of a chemical has almost been pumped into the vat, the pump switches to a slower speed to add the remaining amount. Then, the pump is reversed to clear the chemical from the line so that another similarly based chemical can be pumped through the line into the vat.