| 主权项 |
1. An assembly for supporting a device for movement between several positions, the assembly comprising:
a first four-bar subassembly including proximate and distal ends; a pan-tilt subassembly including first and second end members at proximate and distal ends and first and second link members that pivot about substantially parallel axis at the first and second end members, respectively, the distal end of the first four-bar subassembly linked to the proximate end of the pan-tilt subassembly for rotation about an additional axis that is substantially perpendicular to the parallel axis, the distal end of the pan-tilt subassembly linked to the device; a base and a third arm subassembly between the base and the device, the third arm subassembly linked between the base and the first four-bar sub-assembly; wherein the third arm subassembly includes first and second curved sections and a substantially straight section between the first and second curved sections and wherein oppositely facing ends of the first and second curved sections extend along substantially parallel first and second trajectories. |
