12 touches the ground 44 as the trailer touches the ground 44 the operator then allows winch 34 to gradually feed out cable allowing hopper 20 to lower onto trailer 12 because hopper 20 pivots about pivot points 22 which are lower than the hopper 39 s center of gravity the weight of hopper 20 once it is tilted forward will cause the hopper 20 to lower cable 32 and winch 34 are used to control the downward movement of hopper 20 when hopper 20 contacts support member 30 on trailer 12 hopper 20 is in position for movement to a new location fig2 a shows a rear view of the hopper trailer combination 10 in fig2 a hopper 20 is in the horizontal position on trailer 12 hopper support member 30 supports the front position of hopper 20 risers 26 are spaced on either side of trailer 12 and rise upwardly and rearwardly from the base 24 of trailer 12 bridging member 50 connected to the upper inside of risers 26 spans the space between risers 26 and serves as the cantilever pivot when the hopper is tilted as can be seen in fig2 a front legs 40 of hopper 20 are bored to receive connection members 46 which pass through legs 40 and into bores in the cantilevered bridging member 50 affixed the top of risers 26 fig2 b further illustrates the construction and interrelationship of the parts associated with the pivot points 22 in fig2 b one of the two parallel spaced front legs 40 of hopper 20 is shown with bore 52 a similar bore is on the other front leg of.