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:
Dec. 17, 1996
Filed:
Mar. 02, 1995
David A Schultz, Holmen, WI (US);
Babson Bros. Co., Naperville, IL (US);
Abstract
A milking machine pulsation control includes a microcontroller which generates a pulse width modulated drive signal to control current to pulsator valves, with a high current for pull-in and a lower current for holding. The pulse width modulated drive signal is based on line voltage and compensated for supply frequency. A zero crossing circuit controls internal switching at zero volts to reduce noise. A watchdog circuit resets the computer in the event of latch-up as a result of circuit transients. An over-current shut-down circuit the switches that operate the valve. Synchronism is provided with other pulsation controls. Operator input switches and visual displays are multiplexed to the microcontroller.