Chiropractic articulating traction chair

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIGS.
1 to 3 Referring to FIG.
1, reference 16 shows an articulating chair that incorporates the general embodiments of the present invention.
Articulating chair 16 comprises a lower base frame 7, and shows the hinged lower seating assembly 4 that is mounted on the upper metal frame 15.
The underarm support assembly 2 is mounted to the padded back support rest 3.
A hinge 5 connects the padded back support rest 3 to the lower seating assembly 4.
The padded arm rests 6 join the lower base frame 7 with the upper metal frame 15.
As illustrated in FIG.
2 the internal working mechanisms of the articulating traction chair are shown.
An electric motor 12 is mounted on the base frame 7.
The 1st electric motor 12 connects to a gear reduction assembly 8 which in turn is welded onto a rod and crankshaft assembly 9.
The crankshaft 9b is typically constructed out of steel in bar stock form, while the rod 9a is made of steel from a square stock.
No 17a and 17b show a set of bearings that are assembled on the rod to reduce friction during articulation of the lower seating assembly 4.
The upper rod bearing 17a is welded to a metal frame on the underside of the lower seating assembly 4.
The lower rod bearing 17b is pressed into a machined opening in the rod 9.
The left end of the crankshaft 9a is held in place by insertion into the crankshaft end-bearing 18.
The crankshaft end-bearing 18 is typically welded into position on the lower base frame 7.
A second smaller electric motor is shown 13 that connects to a worm gear assembly 14.
The acme threaded rod 11 is mounted vertically up through the center of the padded back support rest 3.
Both the gear on the smaller electric motor 13 and the gear on the acme threaded rod assembly 11 are fastened with the use of a pressed keyway.
At the top of the padded back support rest 3 the acme threaded rod 11 screws directly into a metal bar of the underarm support assembly 2.
The metal bar is designed of lightweight alloy material and is machined to accommodate the insertion of the acme threaded rod 11