Suction device
AssigneeChi-Wang Liang
InventorsChi-Wang Liang, Chung-Heng Yang
Life of this patent
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Abstract
A suction device includes a substrate having a plurality of aperture, in each of which an inner ring, a plug and an outer ring are mounted. The plug is moved between the inner ring and the outer ring. The inner ring and the plug are made of a magnet and a magnetic material to attach the plug on the inner ring to seal an axial hole of the inner ring. The plug will move to the outer ring by an external force, such as airflow, to seal an axial hole of the outer ring. An air guide plate is attached on the substrate and has a plurality of channels to be communicated to the axial holes of the outer rings respectively and to extract air therefrom.
Claims9
A suction device, comprising:
- a substrate having an aperture, which has a small diameter portion, a large diameter portion and a shoulder portion between the small diameter portion and the large diameter portion;
- an inner ring received in the large diameter portion of the aperture of the substrate and attached on the shoulder portion, wherein the inner ring has an axial hole communicated with the small diameter portion of the aperture;
- an outer ring received in the large diameter portion of the aperture of the substrate having an axial hole;
- a plug attached on the inner ring and moveable between the inner ring and the outer ring.
Dependencies are inferred from the claim text.