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The present model is a table that produces diagonal movement through hydraulic drive, destined to the correction of the pelvis and recuperation of the vertical column in patients with physical problems.
Many physical problems, quite frequent today, such as muscular, sciatic, neuralgic, etc. pains, are di_ rectly relationed to the displacement of the pelvis at the le_ vel of the sacrum-lumbar articulation. This displacement, caused by accidents, falls, excessive weight carried with an inadequate posture, provoques a distortion of the- skeleton, and consequently alters the neuralgic net that brings about the mentioned physical problems. In these cases, the basic condition for the recuperation of the patient is the correc -tion of the displacement of the pelvis that currently is done through manipulations or through orthopedic tables of manual , hydraulic or pneumatic drive.
The manually operated orthopedic table, though making possible the recuperation of the patient's co -lu n, has the inconvenience of demanding of the physician an elevated physical effort simultaneous to the force control o-peration that is applied to the movable seat.
The hydraulic manually driven orthopedic ta ble that produces vertical and horizontal movements on the patient, solves in a satisfactory manner the inconveniences of the manually driven table, yet it stills presents various disadvantages derived from the mechanisms it uses, such as the inadequacy of the mechanical elements it's made up of; the complexity of the mechanism difficulting its manufacture, and, consequently elevating production costs; the dificulty in the making of the mechanical elements and the excessive number of articulations and movable points, besides resulting in an equipment of elevated weight, demanding frequent mainte nance services.
The piston fixed to the structure that moves the folding platform, is totally unnecessary since, due to problems inherent to the column therapy, mainly the pro -blem of sciatic and lumbar pains, the physician, considering the sensitivity of each patient, must move the platform and the motor-pump unit manually as well as the pistons used in such a model to move the seat., besides being inadequate, are oversized , with a capacity five times beyond the expected, -which also contributes to the high cost of the equipment.
The pneumatic driven orthopedic table also produces vertical and horizontal movements on the patient and solves satisfactorily the above problems. However, it does present certain inconveniences, such as:
- in the movement of the vertical piston, used to arch the lumbar column, it causes a certain discomfort and even pain to the patien , since , being this area of the column the critical spot of the problem, the mere and simple arching provoques muscular contractions in the patient which are the opposite of such a movement ;
- considering it has two movements, vertical and horizontal , the mechanism becomes -more complicated needing two pistons plus all their components to function adequately.
To end once for all with the problems approached above, a table was developed, object of this model that uses a simplified hydraulic drive system to produce one and only diagonal movement of the seat that at the same time arches and tractions the lumbar column of the patient.

The model hereby proposed, will be better understood with the detailed figures annexed, that represent:

- Figure 1 - perspective view of the table with partial cut to show type of drive .
- Figure 2 - perspective view of the table with folded lid.

- Figure 3 - perspective view of the table with partial cut of raised lid to show system of springs.
As- it can be observed by the figures, the table for pelvis correction, object of the present request, is made up of a structure shaped in metal (1) coated with (2) plates, prefereably of plywood, which allows for a better finish. The upper part of the structure (1) is constituted of three distinct parts, the first being the folding lid (3) that when opened leans on the folding arm (4) , also shaped in metal. On the intermediate part is the seat (5) made of metal plates covered with upholstery, slightly convex with a pair of belts on the sides that fasten the hips of the patient. The third part is the back of the seat (7), made prefereably of wood covered with upholstery also with a belt (8) to fasten the back of the patient.
The control of the drive mechanism is done through the key (9) that moves the seat (5) diagonally that holds the hips of the patient during the execution of the recuperation therapy*
The traction movement of the column of the patient is absorbed by the springs (11) used in the fixation of the dorsal back (7) of the structure (l).
The mechanism responsible for operating the table is constituted of a diagonal piston (12) that produces a 45s angle movement on the seat (5) and generates the move - ment of the base (13) sustained by bearings (14).

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To use the equipment developed, the patient is layed on his back, with the hips on the seat (5), his back on the seat back (7) and the legs on the lid (3). The belt (6) fastens the hips of the patient and the belt (8) of the seat back fastens the patient's back.
The therapy is begun by handling the key(9) that drives the diagonal piston (12) that moves the seat (5) diagonall j in a course of aproximatelly 160 milimeters, arching and tractioning the vertebral column of the patient.
The next operation consists in the retroactive movement of the piston (12) to its original position. This operation is repeated as many times as necessary, depending on the degree of the physical problem verified in the patient.
The table, hereby proposed, in "that it si -multaneouslly tractions and arches the column, soon decompressing the vertebrae, causes neither discomfort nor pain to the patient. On the contrary, ir makes the treatment more enjoyable.
The conventional equipments need about 30 seconds for each operation, while the proposed table cuts -this time in half, for it resumes itself in one and only move ment of the diagonal piston.
.Besides the mechanical simplification and operational easyness, the proposed table presents lower costs and shorter manufacturing time.