| 摘要 |
A tool for the exertion of firm, well-modulated, compressional and shear force, ideally suited to the removal of nutshells by hand. An inclined surface moves alongside another surface, creating a V-shaped gap. Such movement will cause materials to be gripped, rolled, and crushed. This pair of surfaces is curved end-to-end around a central axis so that one becomes a circular cylinder, while the other assumes the form of a spiral curve, either around or within the first. One part rotates in relation to the other upon the central axis. The rotary-drum embodiment comprises a spiral curve (20a), the ends joined by a convex arc (22a), the resulting shape extended to form a cylinder. A web (38) spans one end of the cylinder to form a cup (40). The web serves to retain materials (92) being worked (such as edible nuts), as well as to support a central spindle (42) upon which a drum (22a) is turned by means of a key-shaped handle (46). The opposing surfaces (74 and 76) of the spiral and the drum are textured to hold the material more firmly as it is worked.
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