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US 4,788,731 AGranted
Mattress
AssigneeAisin Seiki Kabushiki Kaisha
InventorsShinji Yokoi, Kimitaka Naitoh, Masami Ohta
Life of this patent
Estimating the term…
Abstract
In a mattress, a first wadding having numerous gaps therein is provided on one surface of a central core. Body heat of a user on the mattress and sweat emitted from him/her are given off into an inner space of the core through the gaps and are thereafter exhausted from peripheral portions of the mattress. Thus, the user may sleep comfortably in the hot season.
Claims5
A mattress comprising:
- (a) a central core formed by arranging plural coiled compression springs into a rectangular shape;
- (b) a first wadding provided on one surface of said central core, said first wadding having numerous air gaps therein;
- (c) a second wadding provided on the other surface of said central core, said second wadding having good heat insulating properties and having plural convex portions each one of which projects into a corresponding one of said plural coiled compression springs, each one of said plural convex portions containing numerous dead air portions,
- said second wadding comprising a second insulator located near said central core, said second insulator containing therein numerous closed air gaps, and
- a second pad located exteriorly of said second insulator;
- and
- (d) an air permeable cover cloth wrapped around said first and second waddings.
4 more elements
Dependencies are inferred from the claim text.