The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 1990
Filed:
Mar. 20, 1989
Robert A Walker, Minneapolis, MN (US);
Other;
Abstract
An air mattress has top and bottom walls joined to side and end walls with edge seams. A longitudinal web located within the chamber of the air mattress extends between the end walls adjacent to each side wall to form a pair of longitudinal air passages. A plurality of transverse webs located within the chamber extends between the longitudinal webs to form transverse air accommodating passages. The bi-directional air passages and webs reduce uneven areas of the top wall and prevent seal failure and mattress collapse. The mattress is equipped with a one-way air pressure relief valve operable to limit the air pressure in the air mattress to about 1 psi to prevent seam separation and blowout.