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:
Sep. 11, 2001
Filed:
Nov. 02, 1998
Horst Bansemir, Munich, DE;
Bernd Bongers, Kirchheim, DE;
Eurocopter Deutschland GmbH, Munich, DE;
Abstract
Apparatus for damping vibrations of a structure such as the air frame of a helicopter wherein a spring system (,), which has an elastic wall structure forming a tube-shaped hollow body supports a weighted vibrating object (,). At least one region of the wall structure is constructed to be elastically deformable in its plane, with a spring stiffness, tuned to the frequency of the vibration to be damped. The wall structure is formed by several planar spring elements (,), each of which can be elastically deformed in its plane by an arrangement of longitudinal strips (,) and connecting cross pieces (,). A battery of the helicopter can be used as the vibrating weight (,). The vibration damper containing the battery is installed at a location on the helicopter where clear structural vibrations occur in two directions perpendicular to each other and wherein the vibration damper is tuned to the vibrations frequencies in both directions.