Apparatus for making herringbone gears and pumps incorporating the same
AssigneeMicropump, Inc.
InventorCharles F. Carr
Life of this patent
Estimating the term…
Abstract
An apparatus for manufacturing herringbone gears with an injection molding process is provided. The apparatus involves the use of two separable mold halves each of which include a mold cavity for molding one half of the gear. Moldable material is injected into the mold halves when they are in a sealing abutting engagement. After the material solidifies, the mold halves are separated and the gear is simultaneously unscrewed from each mold cavity.
Claims10
An apparatus for manufacturing a herringbone gear, the gear comprising two helical gear halves disposed along a common longitudinal axis and on opposing sides of a central plane extending perpendicular to the axis, each helical gear half having a helical lead, the helical leads of the helical gear halves being substantially the same in magnitude but opposite in direction, the apparatus comprising:
- two mold halves corresponding to the two halves of the gear, each mold half comprising a mold cavity corresponding to one half of the gear and an inner mating face for sealing engagement with the inner mating face of the other mold half, the two mating faces of the mold halves corresponding to the central plane of the gear, one of said mold halves comprising a gate for injecting molding material into the mold halves, at least one of said mold halves being capable of longitudinal movement along the axis of the gear.
Dependencies are inferred from the claim text.