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. 06, 1976
Filed:
Aug. 02, 1974
Fount E McKee, Houston, TX (US);
Delta-X Corporation, Houston, TX (US);
Abstract
A malfunction detector circuit for use in conjunction with a pump-off control circuit which is periodically actuated by a timer and which monitors the current drawn by the drive motor of a liquid well pump. The malfunction circuit monitors the operation of the timer, pump-off control circuit, and drive motor of the well pump for detecting any abnormalities in operation and provides a signal if a malfunction occurs. The malfunction circuit is actuated by the pump-off circuit timer unless the pump-off circuit gains control of the driver motor and interlocks the malfunction output. A counter is provided to count a predetermined number of sequential failures before a malfunction is indicated. In addition, an excessive current measuring circuit detects malfunctions such as parted rods, split tubings, stuck valves and other abnormal situations.