| 摘要 |
Mounting means for an airfoil member for mounting the member above the roof of the cab of a tractor in order to reduce the air-drag on the trailer unit, the inclination of the airfoil member being adjustable by clampable pivot means provided in support arms. At the right hand clampable pivot point, a pair of grip washers having undulations are welded to the support arm and tube bracket and urged into light clamping contact by means of a spring washer and nut and bolt. At the left hand clampable pivot point, a pair of grip washers having undulations are likewise welded to the support arm and tube bracket, and rigidly held in engagement by means of a head having an internally threaded portion engaging with the threaded shank of a bolt, a detachable handle being provided for quick clamping, and release to thus enable the driver to release the clamping mechanism and reset the inclination of the airfoil member in minimum time and effort. |
