초록 ▼

A tripod apparatus 10 having a generally triangular base 11, three upright members 13, 14, 15, each pivotally connected at one end to the base 10 proximate the respective corners of the base 10 and extending upwards to a support member 19 which, in use, provides a support point for raising or loweri

A tripod apparatus 10 having a generally triangular base 11, three upright members 13, 14, 15, each pivotally connected at one end to the base 10 proximate the respective corners of the base 10 and extending upwards to a support member 19 which, in use, provides a support point for raising or lowering an object such as a rescue basket along a cliff or building face. One of the uprights 15 is articulated so that the user may selectively move the support member 19 between a retracted position rearward of a forward side edge 17 of the base 11, and an extended position forward of the forward side edge 17. Preferably, the upright 15 is in the form of a bar linkage having a first elongate member 21 which is pivotally connected at its upper end to the support member 19 and at its other end to an intermediate position of a second elongate member 22. The second member 22 has one end pivotally connected to a rearward corner of the base 11 with its other end portion forming a lever 60 which is used to move the intermediate position thereof relative to the nominal forward side edge 17 of the base 11, which movement is transmitted to the support member 19 by the first elongate member 21.

대표청구항 ▼

A tripod apparatus comprising: a base; a support member for supporting an object generally above the base; a first and a second upright member each having one end pivotally connected to the base at spaced positions about a common pivot axis which defines a forward edge of the base, and other ends of

A tripod apparatus comprising: a base; a support member for supporting an object generally above the base; a first and a second upright member each having one end pivotally connected to the base at spaced positions about a common pivot axis which defines a forward edge of the base, and other ends of the first and second upright members connected to the support member; and a third upright member having a first end pivotally connected to the base at a rearward position which is spaced rearwardly of the forward edge, and a second end connected to the support member, the third upright member including means for extending the third upright member to permit pivoting of the first and second upright members about the common pivot axis to move the support member from a retracted position rearward of the forward edge to an extended position forward of the forward edge.