Self-tightening vehicle roof rack

Details Self-tightening vehicle roof rack Self-tightening vehicle roof rack

1988-03-15

1989-10-31

Hornsby, Harvey C.

Package and article carriers

Vehicle attached

Carrier associated with vehicle roof or trunk lid

224320, 224322, B60R 904

Patent

active

048771694

ABSTRACT:
A crossbar on a vehicle roof rack is supported by a pair of pedestals through a cam on each pedestal which exerts its clamping action by rotating toward the center of the vehicle, each cam operating independently of the fastening clip which secures each pedestal to the vehicle roof. The direction of the clamping rotation of the cams and the rate of increase of the radius of each cam as it rotates in the clamping direction provides the cams with a self-tightening effect--i.e., should the apparatus ever begin to loosen after the cam is engaged, any pulling apart of the pedestals will cause the crossbar to draw itself over the cam, causing the cam to rotate in the tightening direction and re-secure the crossbar.

REFERENCES:
patent: 431745 (1890-07-01), Haven
patent: 3064868 (1962-11-01), Treydte
patent: 3273768 (1966-09-01), Duer
patent: 3837547 (1974-09-01), Joos
patent: 4496089 (1985-01-01), Eklund
patent: 4586638 (1986-05-01), Prescott et al.
patent: 4688706 (1987-08-01), Thulin

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