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:
May. 16, 1978
Filed:
Mar. 10, 1977
Irvin R Kraska, Lansing, IL (US);
John Stark, Bartlett, IL (US);
Wieslaw L Lichodziejewski, Schaumburg, IL (US);
Gard, Inc., Niles, IL (US);
Abstract
A residual tire life prediction system uses a clock to trigger a bang generator that provides pulses of electrical energy to a pulse-echo transducer. The transducer converts pulses of electrical energy to pulses of ultrasonic vibration. The transducer is located on the tread of a steel belted tire to transmit pulses of ultrasonic energy into the tire and to receive reflected ultrasonic energy from plies of the tire casing. The transducer converts the reflected ultrasonic energy to provide bursts of electrical signals. The transducer is connected to a time varying gain control circuit that has its output connected via a full-wave rectifier to a first gate and to an input of a voltage level detector. The clock is also connected to a first time-delay circuit that is operative after a delay, subsequent to the pulse of the bang generator, to enable a second gate, connected to the output of the voltage level detector, that provides a signal, when it receives the signal based on the reflection from the outer steel belt, to a second time-delay circuit that provides an enable signal at its output after a predetermined delay for a predetermined period of time to the first gate to open it for passage of signals from the rectifier to a peak sensing device that provides an output signal to a digital panel meter for display of the value of the maximum amplitude passing through the first gate.