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. 12, 1980
Filed:
Nov. 06, 1978
Keith R Baker, Waterloo, IA (US);
Deere & Company, Moline, IL (US);
Abstract
A rugged and inexpensive sensor is disclosed for monitoring fuel injection characteristics such as injection pulse timing and width. A clamp is provided with hand grips and expandable jaws for quickly coupling to a fuel injection line. The jaws are biased into engagement with the line but are easily opened for releasing the clamp by urging the hand grips together. A transducer mounted on the clamp senses mechanical vibration caused by pressure pulsations in the line. The transducer is connected to circuitry for providing an output when the signal level from the transducer exceeds a threshold level. The sensor is self-compensating with the threshold level determined automatically from the maximum signal from the transducer. Therefore, different injection lines can be monitored with no manual adjustment of the clamp or circuitry even though the output of the transducer may vary from line to line.