One piece molded fan
AssigneeRobert W. Read
InventorsRobert W. Read, Edmund A. Gress, deceased
Life of this patent
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Abstract
A one piece, fiber reinforced, plastic radiator cooling fan for a truck. The fan is reinforced by: a hub extension which extends from the hub into each blade a substantial distance; by directly interconnecting the leading and trailing edges of adjacent blades to form a juncture therebetween in the form of a spiral located radially outwardly from the hub; by having the leading and trailing edges of adjacent hub extensions interconnect in a smoothly curved line tangent to the hub; by strengthening locations of high stress in each blade; and by avoiding sudden changes in thickness and in direction of the various portions of the fan.
Claims21
A light weight, radiator cooling fan for vehicles, wherein the fan comprises:
- a circular hub means of substantially uniform thickness, wherein its thickness is dictated by pertinent strength considerations;
- a plurality of hub extension means;
- and
- one blade means for each hub extension means;
- wherein:
- said hub means, said hub extension means, and said blade means are integrally formed from fiber reinforced plastic to make a one piece fan;
- and
- each said hub extension means has:
- a thickness substantially equal to the thickness of said hub means;
- a length substantially about the range of fifteen percent to thirty-two percent of the diameter of the fan;
- and
- a width at said hub means substantially about the range of fifty percent to one hundred percent of the width of said blade means at said hub means.
The fan, according to claim l, wherein each blade means is substantially uniform in thickness radially outwardly from its extension means, and has an area located radially outwardly from said hub means and between its hub extension and its trailing edge which is substantially stronger than those portions of said blade means which are substantially uniform in thickness, in order to help the trailing portion of said blade sustain the additive twist loads caused by centrifugal force and the aerodynamic loading of its said trailing portion.
Dependencies are inferred from the claim text.