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. 31, 1991
Filed:
May. 14, 1990
Applicant:
Inventor:
Mark W Pierson, Saco, ME (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01K / ; G01K / ;
U.S. Cl.
CPC ...
374144 ; 1231 / ; 374162 ; 411 13 ;
Abstract
A threaded temperature indicating plug for hot oil containing housings such as vehicle transmissions and the like that can replace the standard oil level plugs of the same and as well afford a plug that from which the temperature at which the oil may have overheated will be recorded and whether there is a definite need to change the oil in the transmission. Liquid crystal areas are provided on an indicator label that is fixed to the plug bolt shank in a liquid-tight manner by a fixed covering and for direct contact with the oil body or a splash from oil at a lowered level.