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. 31, 1995
Filed:
Nov. 05, 1993
Bobby A Collins, Bedford, TX (US);
Glenn R Grimes, Arlington, TX (US);
Dharam J Reddy, Hurst, TX (US);
Bell Helicopter Textron Inc., Fort Worth, TX (US);
Abstract
An improved helicopter landing gear assembly to substantially increase useful service life. The crosstubes are constructed of a material that allows use of thicker crosstubes thereby reducing the operating stress in the crosstubes and helping to increase the fatigue life, while at the same time preserving the required energy absorption characteristics. The inside and outside of the crosstubes are shot peened to help increase the fatigue life. The crosstubes are formed in an unstable temper condition thereby reducing the stress that is induced into the part during formation, and thus helping to increase the fatigue life. The straps are connected to the crosstubes by fasteners located at the sides of the straps and closer to the neutral bending axis of the crosstube so that the fasteners and the fastener holes are subjected to lower stress levels. The combination of these improvements results in a substantially increased life of the landing gear assembly.