Spring biased prop for a pivoted member

Claim 1

A prop for a pivoted member, said pivoted member being connected to a support part by hinge means and being pivotal about a horizontal axis, said prop comprising inner and outer telescopically interfitting tubular members, each tubular member having an outer end, a helical spring having opposite ends and fitting longitudinally within said tubular members, means anchorine one end of said spring to said inner tubular member inwardly from the outer end thereof, means anchoring the other end of said spring to said outer tubular member inwardly from its outer end, said tubular members being shiftable telescopically between an extended position wherein said spring is in an expanded state and a retracted position wherein said spring is in a compressed state, means pivotally anchoring one tubular member outer end to said pivoted member spaced from said horizontal axis, means pivotally anchoring the other tubular member outer end to said support part spaced from said horizontal axis, said spring constituting means for urging said tubular members from their retracted position into their extended position and supporting said pivoted member in a raised position, both said spring anchoring means constituting a pair of tab parts formed in said side wall of each tubular member, each pair of tab parts being bent into the interior of the tubular member in an opposed relationship interlocking with said spring between the turns thereof.