Patent ID: 7534074

Claim:
A flow path switchover device for particulate transport comprising a tube assembly that includes a main tube member and a branch tube member; a rotating shaft that is supported on a bearing member in a freely rotatable manner; and a metal changeover damper that is fixed to said rotating shaft and swings about the rotating shaft as a supporting point in said tube assembly; wherein said main tube member has obliquely cut first main tube member and second main tube member; said first main tube member has a first opening and a second opening on one end thereof; said first opening of said first main tube member is connected with said second main tube member via a metal first ring member having an open end; said second opening of said first main tube member is connected with said branch tube member via a metal second ring member, which has an open end and is arranged at a preset angle with said first ring member; said rotating shaft and said bearing member are arranged at a boundary between said first opening and said second opening; said first ring member, said second ring member, said second main tube member, and said branch tube member are connected to said bearing member; said changeover damper swings between said first ring member and said second ring member about said rotating shaft as the supporting point; and an outer circumferential end face of said metal changeover damper is in pressure contact with an inner circumferential end face of said metal first ring member or with an inner circumferential end face of said metal second ring member to block and seal either connection between said first main tube member and said second main tube member or connection between said first main tube member and said branch tube member.