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. 08, 1983
Filed:
Jun. 10, 1981
Derek A Roberts, Bristol, GB;
John M Treby, Bristol, GB;
Rolls-Royce Limited, London, GB;
Abstract
The fan rotor (10) of a gas turbine engine is driven by a shaft (16) having a first part (16A) supported in a first radial bearing (17) for rotation about an axis (16C). The shaft (16) further has a second part (16B) secured to the rotor for transmitting torque thereto. The second part (16B) is flexible in bending to allow radial displacement of the rotor (10) relative to the bearing (17). Normally, the rotor (10) is supported against said displacement by a second radial bearing (23). If, due to damage, a given dynamic imbalance on the rotor (10) is exceeded, the resulting unbalanced force (F) transversely to the axis (16C) shears the pins (21C) of a coupling (21) provided between the rotor and the second bearing (23). This then permits the rotor (10) to move eccentrically with respect to the axis (16C) by virtue of the resilience of the shaft portion (16B) thereby cushioning the bearing (17) against the force (F).