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:
Jan. 13, 1976
Filed:
Sep. 20, 1974
Applicant:
Inventors:
Alan Henry Vincent, Yeovil, EN;
Ronald William Cure, Yeovil, EN;
Assignee:
Westland Aircraft Limited, Yeovil, EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B64C / ;
U.S. Cl.
CPC ...
416145 ; 416500 ; 74574 ;
Abstract
This invention relates to improvements in bifilar vibration dampers, and particularly to such dampers for use in absorbing vibrations in a helicopter main rotor system. The improved bifilar construction prevents detrimental inertia forces affecting the tuning of the damper and also prevents the ingress of dirt and dust into the moving parts.