초록 ▼

The work chair has a seat squab and a backrest which both pivot on a seat carrier in the same direction interdependently. A load element is fitted to the seat carrier which is adjustable over its linear extension by means of a locking mechanism, whereby the load element pivots the seat squab and bac

The work chair has a seat squab and a backrest which both pivot on a seat carrier in the same direction interdependently. A load element is fitted to the seat carrier which is adjustable over its linear extension by means of a locking mechanism, whereby the load element pivots the seat squab and backrest into position of rest under spring loading. To achieve a relatively large and symmetric spring loading in the smallest space it is foreseen that the load element should consist of two parallel compression springs in between which a hydraulic locking mechanism is fitted whereby one end of the load element is connected by a pivot to the free pivoting part of a lever arm, which forms the backrest-carrying part.

대표청구항 ▼

A work chair having a seat carrier, a seat squab having a front edge and a rear edge, a backrest carrier with a backrest and a lever arm extending from said backrest, a first pivotal connection being formed by a first axle adjacent the front edge for securing the seat squab to the seat carrier, a se

A work chair having a seat carrier, a seat squab having a front edge and a rear edge, a backrest carrier with a backrest and a lever arm extending from said backrest, a first pivotal connection being formed by a first axle adjacent the front edge for securing the seat squab to the seat carrier, a second pivotal connection being formed by a second axle securing a free end of the lever arm of the backrest carrier to the seat carrier, a third pivotal connection between the seat squab and backrest carrier, said third pivotal connection being formed by a third axle connecting said lever arm inward of the free end thereof to the rear edge of said seat squab with a loose connection having play so that the seat squab and backrest will pivot interdependently in the same direction, load element means for pivoting the seat squab and the backrest carrier into a position of rest under spring loading, said load element means comprising two parallel extending compression springs with a hydraulic locking element means disposed therebetween for adjusting the linear extension of each of said two springs, one end of the load element means being pivotally connected to a free end of the lever arm of the backrest carrier and the other end of the load element means being connected to the squab seat adjacent the first pivotal connection.