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:
Nov. 06, 2001
Filed:
Feb. 15, 2000
Herbert L. Walker, Hartford, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
A windmilling brake system for a turbine engine includes a brake drum (,) on an interior surface of an engine rotor. The drum circumscribes a brake unit (,) that includes a brake ring (,) with brake shoes (,) each connected to the ring by respective springs (,). A leg (,) extends from each shoe and toward the ring. The ring is sandwiched axially between bolting flanges (,) on forward and aft carrier portions (,) of a two piece, variable stiffness, dual load path rotor bearing support. Nonsacrificial fasteners secure the ring to one of the flanges while frangible fasteners (,) secure the flanges to each other. The frangible fasteners also extend through an eye (,) in each leg to deflect the springs and hold the brake shoes in an armed state out of contact with the drum. Upon being exposed to abnormal imbalance loads, the frangible fasteners fail in tension to disable one of the two load paths. The failure also enables the springs to concurrently force the shoes into a deployed state in which the shoes contact the drum and inhibit rotor windmilling.