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:
Jan. 02, 1979
Filed:
May. 04, 1977
John E Lindberg, Berkeley, CA (US);
Owen, Wickersham & Erickson, San Francisco, CA (US);
Abstract
A fluid mixing apparatus introduces a controlled amount of gas into a liquid flowing through a conduit. The fluid mixing apparatus incorporates a flow control device which is constructed to produce a variable impedance to fluid flow through the control device. The impedance varies in a pre-planned relationship to the pressure differential across the flow control device and to an acceleration of the flow within the control device. The control device has an outlet connected to the interior of the liquid carrying conduit and has a gas inlet for supplying the gas to the interior of the control device. In a specific embodiment, the flow control device is a vortex chamber which produces rotation of the gas flowing through the gas inlet. This rotation produces a self-choking effect on the gas flowing from the inlet to the outlet. A varying ratio of air to liquid is produced in the liquid conduit downstream of the connection to said outlet with changes in the pressure differential across the control device, and the amount of liquid in relation to the amount of air increases greatly with relatively small increases in the pressure differential across the control device.