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:
Mar. 23, 1976
Filed:
Mar. 31, 1975
Eugene R Speakman, Fullerton, CA (US);
McDonnell Douglas Corporation, Long Beach, CA (US);
Abstract
A bushing for use in high strength materials where fatigue failure is a problem. The bushing is cylindrical and includes a circumferential lubrication groove on its inner surface while fillets and smooth transition surfaces are used to transition between the major cylindrical surfaces of the bushing and the housing. The bushing is pressed into the housing which is an interference fit therewith to reduce stress concentrations. Lubricant is provided to the circumferential lubrication groove by means of a passageway which may include a smooth wall annulus placed in a stepped hole in the housing and retained in the hole by a hollow screw which extends to the area of lubrication. A standard lubrication fitting is threaded into the annulus to provide means for connection to conventional lubricant supplying apparatus.