Patent ID: 7179042
Filing Date: 2007-02-20
Classification: B65G

Abstract:
1. A ramp comprising: a ramp section having, a first rectangular tube rail having a longitudinal rectangular groove in the top surface of the first rectangular tube, a second rectangular tube rail having a longitudinal rectangular groove in the top surface of the second rectangular tube, a longitudinal circular groove in the top of the second rectangular tube at the corner and parallel to the longitudinal rectangular groove in the top surface of the second rectangular tube, with the mouth of the circular groove opening to less than 180 degrees of the circle and encompassing the corner of the top of the rectangular tube, and a second rectangular longitudinal groove in the bottom surface of the second rectangular tube, a tread plate having a perpendicular flange on each longitudinal edge for insertion into the rectangular longitudinal groove on the top surface of the first rectangular tube rail and one of the longitudinal rectangular grooves on the second rectangular tube rail, and a rib attached to and extending between the first rectangular tube rail and the second rectangular tube rail and attached to the tread plate for providing strength to the ramp section.