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:
Sep. 27, 1977
Filed:
Mar. 29, 1976
Applicant:
Inventor:
Paul J White, Vista, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B64C / ;
U.S. Cl.
CPC ...
4161 / ; 416174 ;
Abstract
This invention is primarily a backup seal safety device to prevent a sudden loss of oil through failure of a pressed expansion plug in the front of a hollow, oil-containing crankshaft commonly associated with aircraft engines that supply oil under pressure to a controllable pitch, constant speed aircraft propeller when this type of propeller is utilized. The plug is installed in these engines when a fixed propeller is installed in place of the constant speed propeller.