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. 15, 1981
Filed:
Oct. 30, 1978
Fred G Geil, Annapolis, MD (US);
John H Thompson, Severna Park, MD (US);
Electric Power Research Institute, Inc., Palo Alto, CA (US);
Abstract
Disclosed is a mechanical filter including a resonator mounted within a housing. A first acoustical waveguide extends through a bushing into the housing. Elastomer material fills the bushing and surrounds the first waveguide therein. A compliant member in the form of a bellows having an open end and a closed end is provided in the housing with the open end attached to the housing wall. The first acoustical waveguide is attached to the interior surface of the closed end of bellows, and a second acoustical waveguide is attached to the exterior surface of the closed end of the bellows and to the resonator. The compliant member provides coupling of the first and second waveguides and a hermetic seal.