Seat structure with elastic suspension
Assignee155124 Canada Inc.
InventorPaul Boulva
Life of this patent
Estimating the term…
Abstract
A seat structure is comprised of a support frame having an elastic fabric sheet secured to the frame along opposed lateral sides of the frame and extends across a top seating portion or front part of a backrest thereof. In one embodiment of the invention one or two extensor members are displaceably positioned between the frame and the elastic fabric sheet to a permanent tensioning position where the elastic fabric sheet undergoes an upward displacement and stretching sufficient to support an intended load, herein a user person, thereon or thereagainst in a flexible suspension in the seating or backrest portion and free from contact with any hard surfaces.
Claims16
A seat structure comprising a support frame, an elastic fabric sheet secured to said frame along opposed lateral sides of said frame and extending across a top seating portion of said frame, tensioning means to stretch said elastic fabric sheet and position same at a permanent elevated position above said seating portion sufficient to support an intended load thereon in suspension over said seating portion, said tensioning means being constituted by at least one extensor member having a length of substantially the same length as said opposed lateral sides and a cross-sectional shape for the placement of said extensor member at a predetermined location in a space between said seating portion and said elastic fabric sheet, said cross-sectional shape having a height whereby when said extensor member is slid laterally over said frame to a permanent tensioning position along one of said opposed lateral sides of said frame, said elastic fabric sheet undergoes an upward displacement in at least a part thereof and stretching to tension same to cause said elastic fabric sheet to apply a biasing force against said extensor member, and retention means to maintain said extensor member at said tensioning position.
A seat structure comprising a support frame, an elastic fabric sheet secured to said frame along opposed lateral sides of said frame and extending across a top seating portion of said frame, tensioning means to stretch said elastic fabric sheet and position same at a permanent elevated position above said seating portion sufficient to support an intended load thereon in suspension over said seating portion, said tensioning means being constituted by at least one extensor member displaceably positioned between said frame and said elastic fabric sheet to a permanent tensioning position where said elastic fabric sheet undergoes an upward displacement in at least a part thereof and stretching to tension same, and retention means to maintain said extensor member at said tensioning position, one of said extensor members being an elongated projecting ridge formation immovably positioned and extending along one of said opposed lateral sides of said frame and projecting above a top surface of said frame, and a displaceable extensor member formed as an elongated rod-shaped member and retained in a groove formed in said top surface at the other of said opposed lateral sides of said frame with said displaceable extensor member projecting above said groove, said tension in said elastic fabric sheet applying a biasing force against said rod-shaped member to maintain same engaged in said groove.
Dependencies are inferred from the claim text.