The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 1996
Filed:
Jun. 29, 1993
The Vendo Company, , US;
Abstract
A helical structure having a shaft defining an axis of rotation and a substantially helical flight extending about the axis of rotation and composed of a plurality of sections each having a segment disposed in substantially right angular relation to the axis of rotation. A method for manufacturing a helical structure or the like including the steps of producing a mold having a mold cavity defining a configuration for the helical structure having a substantially helical flight composed of a plurality of sections having segments disposed in substantially right angular relation to an axis of rotation for the helical structure, introducing a moldable substance into the mold cavity to form the helical structure in the configuration and removing the helical structure from the mold cavity by separating the mold along a path substantially aligned with the segments. An apparatus for manufacturing a helical structure or the like, the apparatus including a first mold body having a mold cavity defining a first portion of a configuration for a helical structure having an axis of rotation with a substantially helical flight extending thereabout, a second mold body having a mold cavity defining a second portion of the configuration, and a structure for releasably interconnecting the first and second mold bodies for movement to and from an assembled relationship only along a path substantially right-angularly related to the axis of rotation of the configuration.