Beds – Mattress – Nonplanar top surface
Reexamination Certificate
2004-10-08
2008-11-04
Conley, Fredrick (Department: 3673)
Beds
Mattress
Nonplanar top surface
C005S731000
Reexamination Certificate
active
07444707
ABSTRACT:
A foam chair cushion having transverse support ribs is provided for reduction of shear stress between a person's skin and the surface of the chair cushion. The chair cushion may include transverse, lateral support ribs upon the support surface of the cushion. The support ribs have a predetermined cross-sectional geometry that is curvilinear, with a superior aspect generally disposed for receipt of a person and a inferior aspect opposite. The inferior aspect of the cross-section of the support ribs may undercut the portion of the support ribs vertically above it. Having such cross-sectional geometry, the support ribs are directionally oriented, either toward the one end or the other of the chair cushion. The chair cushion may include support ribs that are directionally oriented toward the foot of the chair in regions adapted for the person's upper torso, buttocks, and lower legs, and directionally oriented toward the head of the chair in a region adapted for the person's thighs. The chair cushion may also include longitudinal cuts in the support surface, perpendicular to the transverse support ribs, thereby defining independent support cells upon the support surface.
REFERENCES:
patent: 5568660 (1996-10-01), Raburn et al.
patent: D393071 (1998-03-01), Kennemore
patent: 6036271 (2000-03-01), Wilkinson et al.
patent: 6256822 (2001-07-01), Weston et al.
patent: 6381784 (2002-05-01), Davis et al.
Conley Fredrick
Dority & Manning P.A.
Span-America Medical Systems, Inc.
LandOfFree
Shear reducing chair cushion does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Shear reducing chair cushion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shear reducing chair cushion will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4027106