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:
Feb. 15, 1977
Filed:
Mar. 06, 1975
Applicant:
Inventors:
Julius Lerner, Broomall, PA (US);
Robert Mayer, Ardmore, PA (US);
Assignee:
Sun Oil Company of Pennsylvania, Philadelphia, PA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05D / ;
U.S. Cl.
CPC ...
13710121 ; 48195 ; 13710131 ; 137551 ; 137563 ; 137565 ;
Abstract
A system for injecting a predetermined amount of additive fluid into a main stream of fluid which controls the amount of additive injected by a timing circuit. A pump continuously circulates the additive through a circuitous path having a valve which diverts the additive into the main stream. A control system receives signals from a turbine meter in the main stream and opens the valve a predetermined length of time at a frequency depending on the signals received from the turbine meter, thereby maintaining a constant concentration of the additive in the main stream.