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:
Apr. 15, 1986
Filed:
Jan. 18, 1985
Wilbert E Beller, Park Ridge, IL (US);
The Singer Company, Stamford, CT (US);
Abstract
An oil level sensor assembly adapted for installation in an automobile engine crankcase at the level corresponding to 'low oil'. The sensor assembly utilizes the principle that air is expandable whereas oil is not. Accordingly, when it is desired to sense the oil level, a predetermined amount of fluid is trapped within a chamber sealed by a diaphragm. If the oil level is adequate, then the sensor will be below the oil level and the trapped fluid will be oil. However, if the oil level is low, the trapped fluid will be air. After the fluid is trapped, a spring operating on the diaphragm attempts to expand the chamber. If the admitted fluid is air, the chamber can be expanded and a switch contact will be made, to provide an indication of low oil level. On the other hand, if the chamber is filled with oil, the chamber will not expand and the switch contact will not be made.