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:
Jul. 11, 1995
Filed:
Dec. 14, 1993
Leonard J Doolin, Southbury, CT (US);
Frank P D'Anna, Seymour, CT (US);
Stephen V Poulin, Stratford, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
One embodiment of a main rotor pitch control rod subassembly includes an upper rod end segment having a bearing subassembly, a lower rod end segment having a bearing subassembly, an eccentric bushing disposed in rotatable combination with the upper rod end segment bearing subassembly for varying the axial length of the pitch control rod subassembly, a composite central body structure interposed between the upper and lower end segments, a composite strap member wrapped around and secured in combination with the lower end segment bearing subassembly, the composite central body structure, and the upper end segment bearing subassembly, eccentric bushing combination, a composite overwrap overlayed in combination with the composite strap member, a locking key member and a clamp-up bolt for clamping the composite strap member in tensioned combination with the locking key member, and a locking bolt. The eccentric bushing has a plurality of spaced apart bushing apertures formed therethrough, and the locking key member includes a clevis configuration having a plurality of spaced key apertures formed therethrough, interaction between the bushing and key apertures providing a fine, vernier-type adjustment capability. To vary the axial length of the pitch control rod subassembly, the eccentric bushing is rotated about the upper rod end segment bearing subassembly to a predetermined position wherein one of the bushing apertures aligns with one pair of the key apertures. The locking bolt is inserted through the aligned apertures to lock the eccentric bushing in the predetermined position.