Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1998-10-07
1999-10-19
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604264, A61M 532
Patent
active
059680229
ABSTRACT:
A needle has a hollow cylindrical member defining a lumen along a center axis. A first bevel face is formed at an incline across an end portion of the needle between opposite outer wall surfaces having a first inclined angle with respect to the axis. Second and third bevel faces (i.e., a right bevel face and a left bevel face) converge inwardly from point along the first bevel face to an endmost point where their planes intersect. The right and left bevel faces are formed by relatively rotating the needle through a first rotational angle and grinding the respective converging bevel face. The second and third bevel faces converge at a second more-steeply inclined angle to the point. Opposite from the first bevel face, a sub-bevel face is formed in an oblique direction with respect to the axis center, thinning the wall thickness of the cylindrical member. The point is thus provided with a prow-like cutting edge inclined rearwardly from the point at the intersection between the second and third bevels, and two lateral cutting edges at the intersection of the sub-bevel and the second and third bevels, respectively. The result is a sharp and durable point where the cutting edges converge at a relatively steep angle, the point being spaced radially inwardly from an extension of the outer wall of the cylindrical member.
REFERENCES:
patent: 1749919 (1930-08-01), Mierley
patent: 2751907 (1956-09-01), Hickey
patent: 3308822 (1964-04-01), De Luca
patent: 3924617 (1975-12-01), Ferro
patent: 4368738 (1983-01-01), Tersteegen et al.
patent: 4490139 (1984-12-01), Huizenga et al.
patent: 5484422 (1996-01-01), Sloane, Jr. et al.
patent: 5575780 (1996-11-01), Saito
patent: 5788679 (1998-08-01), Gravlee, Jr.
patent: 5807317 (1998-09-01), Krech, Jr.
patent: 5810788 (1998-09-01), Racz
patent: 5820609 (1998-10-01), Saito
LandOfFree
Medical hollow needle and method of production does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Medical hollow needle and method of production, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Medical hollow needle and method of production will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2049180