Air foil construction
First Claim
Patent Images
1. An air foil for the cab of a highway tractor having a box-like trailer:
- a foil structure having a pair of panels disposed at a substantial acute angle relative to one another to provide a substantially straight edge for cleaving into the air traveled by the vehicle,means for mounting the air foil structure on the roof of the tractor cab with the edge facing forwardly but at an acute angle to the horizontal and to the vertical,the rear edges of said panels lying in a vertical plane,said air foil structure having an opening formed in its nose portion to facilitate entry of air into said air foil structure,the rear margins of said panels terminating in outwardly flaring flanges for deflecting air laterally,said flanges tapering in width so as to decrease in size from the upper portions thereof to the lower portions, so that air deflection increases as the displacement of the flange from the sides of the trailer increases.
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Abstract
An air foil having a general shape of a half pyramid, but wherein when mounted in place, its rear edges are vertical. Such rear edges terminate in tapered marginal flanges which are angularly related to the remainder of the structure for air deflection purposes. This air foil can be cab mounted or mounted on the trailer in front of the dolly. Another form of air foil comprises a spoiler for the rear upper corner of a trailer. A further air foil comprises an air deflector for the bumper of a highway vehicle.
96 Citations
6 Claims
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1. An air foil for the cab of a highway tractor having a box-like trailer:
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a foil structure having a pair of panels disposed at a substantial acute angle relative to one another to provide a substantially straight edge for cleaving into the air traveled by the vehicle, means for mounting the air foil structure on the roof of the tractor cab with the edge facing forwardly but at an acute angle to the horizontal and to the vertical, the rear edges of said panels lying in a vertical plane, said air foil structure having an opening formed in its nose portion to facilitate entry of air into said air foil structure, the rear margins of said panels terminating in outwardly flaring flanges for deflecting air laterally, said flanges tapering in width so as to decrease in size from the upper portions thereof to the lower portions, so that air deflection increases as the displacement of the flange from the sides of the trailer increases. - View Dependent Claims (2, 3, 4)
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5. An arrangement for lessening the air drag on a wheeled dolly comprising an air foil structure having a pair of essentially triangular panels angularly related to one another and joined at one pair of edges to define a straight edge,
another pair of edges constituting the base of said air foil structure, the remaining pair of edges defining rear edges of said air foil structure, means for mounting said air foil structure in a position with the base uppermost and just forward of a wheeled dolly and in a position to cleave the air which would otherwise be directed onto said dolly and for deflecting said air outwardly laterally, the nose of said air foil structure being truncated to define an opening for the passage of air into said air foil structure, the rear margins of said panels terminating in outwardly flaring flanges for air deflection, said flanges tapering in width so as to increase in size from the base portion downwardly so that air deflection increases as the displacement of the flanges from the planes containing the faces of the tires of said dolly increases.
Specification