Vertical motion pendant arm
Embodiments of the invention provide a vertical motion pendant arm for supporting an enclosure at a desired height. The vertical motion pendant arm can include an enclosure mounting assembly, a support mounting assembly, and one or more connectors. The vertical motion pendant arm can also include a drawbridge mechanism having a rotatable worm, a rotatable gear that engages the rotatable worm, one or more drawbridge arms coupled to the rotatable gear, and one or more gas springs coupled to the drawbridge arms and the connectors. The gas springs can provide a counterforce to the enclosure.
1. A vertical motion pendant arm for supporting an enclosure at a desired height, the vertical motion pendant arm comprising:
an enclosure mounting assembly;
a support mounting assembly;
at least one connector that couples the enclosure mounting assembly to the support mounting assembly; and
a drawbridge mechanism including
a rotatable worm,
a rotatable gear that engages the rotatable worm,
at least one drawbridge arm coupled to the rotatable gear, and
at least one gas spring coupled to the at least one drawbridge arm and the at least one connector, the at least one gas spring providing a counterforce to the enclosure.
2. The vertical motion pendant arm of claim 1 wherein the rotatable worm is vertically positioned.
3. The vertical motion pendant arm of claim 1 and further comprising a vertical shaft that engages the rotatable worm, wherein the vertical shaft includes an adjustment interface.
4. The vertical motion pendant arm of claim 3 wherein the drawbridge mechanism is positioned within the support mounting mechanism and the adjustment interface is accessible from outside of the support mounting mechanism.
5. The vertical motion pendant arm of claim 1 wherein the at least one gas spring provides the counterforce to maintain the vertical motion pendant arm at the desired height.
6. The vertical motion pendant arm of claim 1 wherein the rotatable worm rotates the rotatable gear and the rotatable gear rotates the at least one drawbridge arm.
7. The vertical motion pendant arm of claim 6 wherein the at least one gas spring is coupled to the at least one drawbridge arm at a pivot point that is vertically adjustable by rotation of the drawbridge arm.
8. The vertical motion pendant arm of claim 7 wherein the counterforce is one of increased and decreased when the pivot point is vertically adjusted by rotation of the drawbridge arm.
9. The vertical motion pendant arm of claim 1 wherein the at least one connector includes a top connector and a bottom connector.
10. The vertical motion pendant arm of claim 1 wherein the at least one connector provides a connection channel between the support mounting assembly and the enclosure mounting assembly; and further comprising a first conduit attachment at the support mounting assembly, a second conduit attachment at the enclosure mounting assembly, and a conduit that provides a continuous pathway through the connection channel from the first conduit attachment to the second conduit attachment.
11. The vertical motion pendant arm of claim 1 wherein the enclosure mounting assembly is adapted to be coupled to the enclosure.
12. The vertical motion pendant arm of claim 1 and further comprising a tension adjustment device that provides a frictional resistance to movement of the vertical motion pendant arm.
13. The vertical motion pendant arm of claim 12 wherein the tension adjustment device includes an adjustment knob accessible outside of the vertical motion pendant arm to one of increase and decrease the frictional resistance to movement of the vertical motion pendant arm.
14. The vertical motion pendant arm of claim 1 wherein the rotatable gear includes a first set of teeth and the rotatable worm includes a second set of teeth, wherein the first set of teeth engages the second set of teeth.
15. A vertical motion pendant arm for supporting an enclosure at a desired height, the vertical motion pendant arm comprising:
a first mounting assembly including a first bottom cover and a first base, the first bottom cover including a first series of holes accessible from outside the first mounting assembly;
a first rotation mechanism coupled to the first mounting assembly to allow rotation of the first mounting assembly about the first base, the first rotation mechanism including a stop that rotates with the first rotation mechanism; and
a first removable screw in one of the first series of holes to engage the stop and prevent rotation of the first mounting assembly about the first base past the first removable screw.
16. The vertical motion pendant arm of claim 15 wherein the first series of holes includes holes spaced apart at about 30-degree increments around the first rotation mechanism.
17. The vertical motion pendant arm of claim 15 and further comprising a second mounting assembly including a second bottom cover and a second base, the second bottom cover including a second series of holes accessible from outside the second mounting assembly; a second rotation mechanism coupled to the second mounting assembly to allow rotation of the second mounting assembly about the second base, the second rotation mechanism including a second stop that rotates with the second rotation mechanism; and a second removable screw in one of the second series of holes to engage the stop and prevent rotation of the second mounting assembly about the second base past the second removable screw.
18. The vertical motion pendant arm of claim 15 wherein the first mounting assembly is adapted to be connected to the enclosure.