Counterbalancing on collapsible flatracks
OwnerMartin Clive-Smithinventor
Life of this patent
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Abstract
A collapsible flatrack assembly has a counterbalancing system whereby a normally upright post, pivotable relative to a horizontal base, is movable relative to the base under the action of a biasing force towards the upright position. The counterbalance includes a bar spring and a coacting follower which engages with the spring during movement of the post to deflect the spring.
Claims24
A counterbalancing system for a collapsible flatrack assembly comprising relatively pivoted first and second parts, one of said first and second parts comprising a normally upright post and the other of said parts comprising a normally horizontal base part of the flatrack assembly, the counterbalancing system comprising at least one bar spring mounted on said first part and a follower mounted on said second part, the follower being engageable with said bar spring on relative pivotal movement of said first and second parts, the bar spring having a fixed mounting portion and a free end, and the follower being arranged to make contact, on said relative pivotal movement of the first and second parts, with the bar spring adjacent said free end to deflect the spring in a direction tending to resist movement of the post from an upright towards a horizontal position, a former being provided on said first part between said fixed portion and said free end of the spring such that as said spring deflects, portions of the spring progressively come to rest on the former.
A collapsible flatrack comprising first and second parts comprising a normally horizontal base part and at least one normally upright post, and including a counterbalancing system comprising at least one bar spring mounted on said first part and a follower mounted on said second part, the follower being engageable with said bar spring on relative pivotal movement of said first and second parts, the bar spring having a fixed mounting portion and a free end, and the follower being arranged to make contact, on said relative pivotal movement of the first and second parts, with the bar spring adjacent said free end to deflect the spring in a direction tending to resist movement of the post from an upright towards a horizontal position, a former being provided on said first part between said fixed portion and said free end of the spring such that as said spring deflects, portions of the spring progressively come to rest on the former.
Dependencies are inferred from the claim text.