SU105261A1 - Chair with movable seat - Google Patents

Description

The subject of the invention is a chair with a movable seat fixed on the upper end of the rod of a vertical piston cylinder, which also serves as the supporting leg of the chair.

Known (for example, dental) chairs with a seat mounted on the upper end of the stem of a vertical piston hydraulic cylinder, the lower end of which is connected to a reservoir for the working fluid equipped with a valve device controlled by a minimum tool, have the disadvantage that they do not provide reliable support for seat w, when it is mixed, its body.

This disadvantage is eliminated in the described chair by the fact that the hydraulic cylinder rod is spring-loaded by means of a coiled spring located between the inner and outer housings coaxially with the stem and supported by the upper end of the chair seat and the lower end of the tank with the working fluid.

The drawing shows a chair in longitudinal section.

Stu.; 1 is made in the form of a stool, the base of which is a reservoir stamped from sheet steel / in the shape of a truncated cone, filled with a working fluid (for example, by weight). A column 2 of sheet steel welded into the tank’s vertical column is ush, and with a hydraulic cylinder, in the lower part of which a spring-loaded ball valve 3 is mounted to bypass the pa6o4eii fluid. In the upper part of the hydraulic cylinder there is a direction; and the sleeve 4 for the rod 5, fitted at the lower end of the junction 6, is tightly inserted into the hydraulic cylinder. The upper end of the stem; the stem serves onopoii for a round 7 of the seat with a soft upholstery), a spring-loaded twisted external 8, the lower end of which is drawn into the lid of the working fluid reservoir. The spring is threaded between the inner casing 9 fastened to the bottom surface of the seat and the outer casing 10 fastened to the cover

fluid reservoir. The tank is equipped with a ring pedal device // acting on the bypass valve of the hydraulic cylinder.

When the seat of the chair is in its initial upward position under the influence of the coiled springs 1, the hydraulic cylinder rod D =) and the top is mounted, resulting in a vacuum in the cylinder and the working fluid through the overflow valve fills the cylinder's working volume.

A person sitting on a chair with his own weight pushes on the hydraulic rod of the hydraulic cylinder, but the restraint claian automatically locks the outlet, working fluid from the cylinder. If you wish, he will squeeze the seat on the seat, sitting on the chair, push Horoii onto the ring pedal, which, through the pull-up system, opens the bypass valve. The working fluid flows from qi, 1indra into the reservoir, and C11d 1zi 1 smoothly lowers to the desired position. If the seated person rises, the seat of the chair

under the influence of the spring, it continuously moves up to the top.

Subject invention

The chair is mobile. with a septum attached to the upper end of the stem of a vertical Nornshih hydraulic cylinder, the lower end of which communicates with a reservoir for the working fluid, equipped with a valve device, which is fitted with a 1m device, characterized in that, in order to provide reliable support for the patient Regardless of the movement of its body, co-generation with the corresponding lift of the chair seat, the hydraulic cylinder HJTOK is spring-loaded through the BHTOII spring, located between the coaxial stem and the inside with the upper and lower housings and with the upper end resting in the chair seat, and the lower end into the tank cover with the working fluid.