Chairs and seats – Bottom or back – Framework
Patent
1977-02-23
1979-03-13
Mitchell, James C.
Chairs and seats
Bottom or back
Framework
5347, A47C 2300
Patent
active
041439163
ABSTRACT:
A ventilating seat cushion for use between a body and a supporting surface which comprises a panel or grid in the form of a sheet of resilient plastic material having a plurality of protuberances arranged in columns and rows which act to support the body in spaced relation to the supporting surface with a lattice of channels formed by the protuberances between the supporting surface and the body for ventilation, certain of the protuberances being star-shaped in plan view, each star-shaped protuberance including portions extending toward adjacent protuberances in the associated row and portions extending toward adjacent protuberances in the associated column, the extending portions of adjacent protuberances in adjacent rows overlapping each other in the direction of the columns and the extending portions of the adjacent protuberances in adjacent columns overlapping each other in the direction of the rows to stiffen the sheet of plastic material against flexure along any straight line extending across the support panel.
REFERENCES:
patent: 3162487 (1964-12-01), Trotman
patent: 3514156 (1970-05-01), Fields
patent: 3940183 (1976-02-01), Seltzeret al.
Trotman Helen H.
Trotman Herbert H.
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