Provenda Marketing Ag

Equus Marketing Ag

Peter Tobler

To permit use of injection-molded plastic parts in chairs which, otherwise, have a wide variety of coverings or shapes of the seats and/or the chair backs, the seats and chair backs are upholstered with material such as fabric or leather or imitation leather in accordance with selected colors, and made in shapes determined by designers; the back of the chair, and where the coverings are attached to a chair core (45), typically of plywood or the like, is then covered by injection-molded plastic shells or panels (51, 54) which can be snap-in attached by an interengaging attachment means to support brace (27) for the chair back, which support brace may form part of a synchronous seat-back tilting mechanism (15). The seat adjustment tilting mechanism (15) can be identical for any numbers of seats or chair backs, of respectively different shapes (FIGS. 3, 4, 5, 6), thereby permitting inexpensive modular construction and reducing stocking requirements for spare parts.

Chair construction arrangement, particularly for office chairs, typing

To permit backward rocking of the back or back-and-seat of a chair, independently of the previously tilted-back position of the chair, a comfort position memory structure is provided which includes a manually adjustable variable stop structure formed by a cam curve (37) with a serrated or toothed surface, engaged by a stop element (41) coupled to the seat (17, 19). The cam (37) is manually rotatable, by being secured to an externally user-accessible adjustment segment (45). To set a predetermined tilted position, the user tilts back on the chair, and then permits the chair to tilt forward to a comfortable position, and then rotates the manually engageable segment (45) until a tooth (39) of the cam disk (37) is engaged by the stop (41). A spring (32) biasses the chair forwardly and against the stop, unless tilted back by the user.

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Rheineck, Switzerland

Peter Tobler