Herb grinder and blades for herb grinder

1. A grinder, comprising:

a bottom;

a first row of first blades extending from the bottom;

a top; and

a second row of second blades extending from the top, wherein each of the first blades and second blades is shaped with,

an outer surface curved along a first circle concentric with the grinder,

an inner surface curved along a second circle nonconcentric with the grinder and meeting the outer surface to form a first point at a first end of the respective first or second blade, and

a back surface extending between the inner surface and outer surface to form a pair of second points at a second end of the respective first or second blade;

wherein the first blades and second blades are triangle shaped;

wherein the first blades and second blades are configured to move past each other with the pairs of second points leading when the top is rotated in a first direction relative to the bottom; and

wherein the first blades and second blades are configured to move past each other with the first points leading when the top is rotated in a second direction relative to the bottom opposite the first direction.

2. The grinder of claim 1 , wherein:

each of the first blades includes an outer surface formed on a third circle that is concentric with the bottom;

each of the second blades includes an outer surface formed on a fourth circle that is concentric with the top; and

each of the fourth circles is disposed between two of the third circles.

3. The grinder of claim 1 , wherein each of the first blades and second blades is formed from three arcs connected in a triangular shape in plan view, wherein the inner surfaces are the same length as the respective outer surfaces, and wherein the back surfaces are shorter than the respective inner surfaces and outer surfaces.

4. The grinder of claim 1 , wherein the bottom includes an opening formed through the bottom.

5. The grinder of claim 4 , further including a filter disposed under the bottom.

6. A grinder, comprising:

a bottom;

a first triangular blade connected to the bottom, wherein the first triangular blade includes,

an outer surface curved along a first circle concentric with the grinder,

an inner surface curved along a second circle nonconcentric with the grinder and meeting the outer surface to form a first point oriented in a first direction around the bottom, and

a back surface extending between the inner surface and outer surface to form a second point and third point oriented in a second direction around the bottom;

a top; and

a second triangular blade connected to the top, wherein the second triangular blade includes,

an outer surface curved along a third circle concentric with the grinder,

an inner surface curved along a fourth circle nonconcentric with the grinder and meeting the outer surface to form a first point oriented in a first direction around the top, and

a back surface extending between the inner surface and outer surface to form a second point and third point oriented in a second direction around the top;

wherein the first triangular blade and second triangular blade are configured to move past each other with their respective second and third points leading when the top is rotated in a first direction relative to the bottom; and

wherein the first triangular blade and second triangular blade are configured to move past each other with their respective first points leading when the top is rotated in a second direction relative to the bottom opposite the first direction.

7. The grinder of claim 6 , further including:

a first magnetic element disposed on the bottom; and

a second magnetic element disposed on the top.

8. The grinder of claim 6 , further including an opening formed through the bottom.

9. The grinder of claim 8 , further including a filter holder attached to the bottom.

10. The grinder of claim 9 , further including a pin extending into the bottom and into the filter holder.

11. The grinder of claim 6 , further including a row of first triangular blades connected to the bottom.

12. The grinder of claim 11 , wherein each first triangular blade of the row of first triangular blades is circumferentially offset from an adjacent first triangular blade.

13. The grinder of claim 6 , wherein the bottom includes a spindle at a center of the bottom.

14. A grinder, comprising:

a bottom;

a top; and

a triangular blade including,

a first arc-shaped surface curved along a first circle concentric with the grinder,

a second arc-shaped surface curved along a second circle nonconcentric with the grinder and connected to the first arc-shaped surface at a first end of the blade to form a first point of the blade, and

a third arc-shaped surface connected to the first arc-shaped surface and second arc-shaped surface at a second end of the blade to form a second point and third point of the blade;

wherein the blade is configured to move with the first point leading when the bottom is rotated in a first direction relative to the top; and

wherein the blade is configured to move with the second point and third point leading when the bottom is rotated in a second direction relative to the top.

15. The grinder of claim 14 , wherein the first arc-shaped surface is convex, the second arc-shaped surface is concave, and the third arc-shaped surface is concave.

16. The grinder of claim 14 , wherein a top of the grinder blade includes a chamfered edge.

17. The grinder of claim 14 , wherein a length of the first arc-shaped surface is equal to a length of the second arc-shaped surface.

18. The grinder of claim 14 , wherein the first arc-shaped surface and second arc-shaped surface are neither parallel nor concentric.