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:
Jun. 11, 1991
Filed:
Oct. 07, 1988
John A Violette, Granby, CT (US);
David P Nagle, Windsor Locks, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
A pitch retention member rotatably mounts a propeller or fan hereto radially outwardly from a spinner or a hub. The member attaches to the blade of a pair of tenons, each tenon having a hole passing therethrough for receiving a pin about which the blade may rotate. The pitch retention member cooperates with a motion limiter provided at the base of the blade to: damp rotational movement of the blade about the pin to minimize blade angular excursions when centrifugal loads are low; improve high speed blade stability; moderate blade vibratory motion and tune out undesirable blade resonant frequencies; and, absorb force created by impact with foreign objects. Such impact is adsorbed at a desired threshold level of bending load of a crushable material disposed within the blade retention pitch member.