Methods and apparatus for preparing a hemispherical surface
OwnerPing Xie, Xue Liinventors
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Abstract
Methods and apparatus for preparing at least a hemispherical surface with a desired dimension have been disclosed. The method includes at least two steps: a primary cutting mode for mostly reaming a lower portion of the target site, which enveloped area from the pole to intermediate latitude and a finishing cutting mode for reaming either an upper portion or an entire area of the site by less number of times of rotation, respectively. The intermediate latitude locates between the pole and the equator of hemisphere.
Claims10
A method for preparing a continuous hemispherical surface having a desired dimension comprising steps of:
- reaming a first portion of a target site by more frequently rotating a first cutting component around a longitude axis of a hemisphere until the site has a desired dimension and is at least in a partial hemispherical form defined from pole to an intermediate latitude of the hemisphere;
- and
- reaming a second portion of the site by less frequently rotating a second cutting component around the longitude axis until the site is in a full continuous hemispherical form, wherein the first and the second cutting component have an identical spherical cutting radius, wherein the intermediate latitude locates between pole and equator of the hemisphere and has a range of a latitude defined from 35 to 55 degree while a latitude of pole is 90 degree.
A method for preparing a continuous hemispherical surface having a desired dimension comprising steps of:
- reaming a lower portion of a target site by rotating a first cutting surface of a reamer around a longitude axis of a hemisphere at a higher rotating frequency in order that the site has a desired depth and is at least in a partial hemispherical form defined from pole to an intermediate latitude of the hemisphere;
- and
- simultaneously reaming an upper portion of the site by rotating a second cutting surface of the reamer around the longitude axis at a lower rotating frequency until the site is in a full continuous hemispherical form, wherein the first and the second cutting surface have an identical spherical cutting radius and are rotating independently in term of a rotating direction and a rotating frequency thereof, wherein the intermediate latitude locates between pole and equator of the hemisphere and has a latitude range defined from 35 to 55 degree while a latitude of pole is 90 degree.
Dependencies are inferred from the claim text.