Apparatus and method for mixing a plurality of substances
Patent 4538222 Issued on August 27, 1985. Estimated Expiration Date: 
April 6, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 6, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsAssigneeApplicationNo. 06/483031 filed on 04/06/1983US Classes:700/67, Plural variables137/101.19, With electrical controller137/88, Mixture condition maintaining or sensing222/52, AUTOMATIC CONTROL366/152.2, By volume or fixed quantity366/160.3By variable pumpExaminersPrimary: Ruggiero, JosephAttorney, Agent or FirmInternational ClassesG05D 11/13 (20060101)G05D 11/00 (20060101) AbstractA self-contained portable unit for producing a mixture of substances in response to two separate flows includes a portable trailer upon which a holding tank is mounted. Various additive channels are maintained on the trailer for introducing additives, at selectable concentrations or rates, into a first flow which occurs through an inlet conduit connected to an input of the holding tank. Connected to an output of the holding tank is an outlet conduit to which an external blender device can be connected. The trailer has additional additive channels contained thereon for introducing further additives, at selectable concentrations or rates, into a second flow between the holding tank and the external device. Control of the additives is maintained by a microcomputer-based controller or a manual, back-up controller, whichever is switchably selected for each additive channel. | |
