Japan Aerospace Exploration Agency

Nec Toshiba Space Systems, Ltd.

Nec Space Technologies, Ltd.

Mitrapex, Inc.

Minoru Tabata

Kiyoshi Fujii

Kyoji Shintate

Satoru Ozawa

To provide an artificial heart valve capable of aiding the functions of the mitral valve of a patient in a minimally invasive manner. An artificial heart valvewhich includes a valve leaflet securing partand valve leaflets (a first valve leafletand a second valve leaflet), and in which the valve leaflets are connected to the valve leaflet securing partat the top portion of the artificial heart valve, the valve leaflets each have a region which narrows in width toward the bottom of the leaflet, and the artificial heart valve is an artificial mitral valve or an artificial tricuspid valve.

Artificial heart valve

A deployable antenna reflector includes a surface cable network formed of a plurality of cables coupled to each other in a mesh pattern. The surface cable network includes at least one rigid rod member that reduces a maximum tensile force caused in the surface cable network.

Deployable antenna reflector

A deployable antenna which has a larger aperture diameter by four-side links provided in at least three stages and which includes: six deployment link mechanisms () arranged radially from a central shaft so as to support an outer edge portion of a flexible reflector mirror surface; and one deployment driving mechanism () arranged at a lower portion of a center of arrangement of the six deployment link mechanisms, for unfolding the six deployment link mechanisms. Each of the six deployment link mechanisms includes a first four-side link (), a second four-side link (), and a third four-side link () arranged in an order from a position of the central shaft, around which the six deployment link mechanisms are arranged, toward an outer side of the each of the six deployment link mechanisms so that the each of the six deployment link mechanisms is structured to be foldable in three stages.

Growing community of inventors

Tokyo, Japan

Minoru Tabata