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:
Oct. 20, 1981
Filed:
Sep. 07, 1979
Joseph L Dooley, Chicago, IL (US);
Daniel J Dooley, Burr Ridge, IL (US);
Creative Tool Company, Burr Ridge, IL (US);
Abstract
A transducer device is provided which is arranged to be mounted on flow path-defining structure of a fuel injection system, preferably on the outside of a delivery valve housing including a chamber in which a surge of pressure is built up during operation of the injection pump to cause a transducer of the device to develop a high amplitude and high rate of change electrical signal. The device is readily clamped in place and is light in weight with a center of gravity close to the axis of the chamber, the effect of engine vibrations being minimized. The signal from the device and a signal developed at a predetermined rotational position of the engine crankshaft are applied to an instrument which indicates the relative timing of the signals and the RPM.