Patent ID: 8132648

Claim:
An adjustable tree stand, comprising: a support unit that includes a support platform having two lateral parts, and that further includes first and second mounting structures, each mounted to a corresponding one of said lateral parts of said support platform; a cable unit that includes a cable, a first attachment member connected to one end of said cable, and a second attachment member connected to the other end of said cable for releasably coupling with said second mounting structure; and a control unit including a threaded rod mounted non-rotatably to said first mounting structure, a slide seat connected to said first attachment member of said cable unit and coupled movably to said first mounting structure for sliding movement therealong, a gear set mounted rotatably to said slide seat and threadedly engaging said threaded rod, and a drive part for driving rotation of said gear set to thereby cause said slide seat to move along said first mounting structure for adjusting a tension of said cable unit wherein said gear set includes a first gear formed with an axial threaded hole through which said threaded rod extends threadedly, and a second gear coupled to said drive part and meshing with said first gear, rotation of said second gear due to driving by said drive part resulting in rotation of said first gear relative to said threaded rod and movement of said slide seat along said first mounting structure, wherein said gear set includes a threaded cylinder connected integrally with said first gear and engaging threadedly said threaded rod, said control unit including a bearing installed between said threaded cylinder and said slide seat such that said threaded cylinder and said first gear are co-rotatable relative to said slide seat and that said gear set, said bearing, and said drive part are movable together with said slide seat along said threaded rod, and wherein said first mounting structure includes a strut that extends upward from a forward section of the corresponding one of said lateral parts, a guide that extends rearward from a top part of said strut, a front block mounted to said strut and formed with a blind hole that opens rearward, and a rear block fixed to a rearward part of said guide, said threaded rod including a front end portion fixed in said blind hole, and a rear end portion fixed to said rear block.