Nova Patents
NO873449L

Apparatus for generating shear waves in an earth medium

Abstract

Apparatus for generating a controlled parameter elliptically polarized shear wave into an earth medium. The apparatus consists of a baseplate (52) for engagement with the earth medium in omni-directionally resistant manner and a reaction mass (82) and actuator assembly (96) affixed thereto and energizable to impart reciprocal lateral forces to the baseplate that exert a predetermined resultant force at a controlled rate of rotation.

Term

No projected expiry on record.

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12 members in 6 offices

This recordMember, by publication datePriority claim

Priority claims3

Priority claims
DocumentOfficeKindDate
89743486United States of AmericaA
897434–––
US19860897434–––

Members12

Family members, oldest first
DocumentOfficeKind
NO873449D0NorwayD0
NO873449LThis recordNorwayL
EP0256627A2European Patent Office (EPO)A2
CN87103769AChinaA
CN87103769AChinaA
JPS6350783AJapanA
EP0256627A3European Patent Office (EPO)A3
US4853906AUnited States of AmericaA
US4959818AUnited States of AmericaA
CN1009966BChinaB
EP0256627B1European Patent Office (EPO)B1
DE3776835D1GermanyD1