Patent ID: 7435239
Filing Date: 2008-10-14
Classification: A61M

Abstract:
1. An injection needle having a first ground facet formed on a distal end of a needle tube and at least two ground facets subsequently formed to provide a needle point, characterized in that said first ground facet is of a substantially elliptical shape; a plane which crosses said first ground facet perpendicularly thereto, comprises a central axis of said needle tube, and is parallel to the central axis is regarded as a central plane; the needle point is not present on said central plane; and said needle point is the only needle point, wherein a planar surface forming said first ground facet forms an angle α with a central axis of said needle point, a planar surface forming said second ground facet forms an angle φ with the central axis of said needle point, and a planar surface forming said third ground facet forms an angle θ with the central axis of said needle point, and wherein a α<φ,α<θ, and φ≠θ.