Chairs and seats – Bottom or back – Having fluent material
Patent
1993-09-29
1996-05-07
Nelson, Jr., Milton
Chairs and seats
Bottom or back
Having fluent material
29745225, 29745255, A47C 702
Patent
active
055138993
ABSTRACT:
A filled envelope for use with a shaped tray in a wheelchair comprises upper and lower elastomeric elements. The elements have seals about their edges to create a finite volume. The volume is filled with a fill material which comprises petrolatum and hollow glass spheres. The volume of petrolatum comprising the fill material is not substantially greater than the volume of the interstitial spaces of a quantity of hollow glass spheres alone. The envelope also has additional seals which separate the envelope into quadrants to improve the stability of the cushion to the user.
REFERENCES:
patent: 3402411 (1968-09-01), Hanson
patent: 3407406 (1968-10-01), Werner et al.
patent: 3787908 (1974-01-01), Beck et al.
patent: 3858379 (1975-01-01), Graves
patent: 3968530 (1976-07-01), Dison
patent: 3986213 (1976-10-01), Lynch
patent: 4038762 (1977-08-01), Swan, Jr,
patent: 4108928 (1978-08-01), Swan, Jr,
patent: 4144658 (1979-03-01), Swan, Jr,
patent: 4163297 (1979-08-01), Neumark
patent: 4174420 (1979-11-01), Arolick et al.
patent: 4229546 (1980-10-01), Swan, Jr,
patent: 4243754 (1981-01-01), Swan, Jr.
patent: 4255202 (1981-03-01), Swan, Jr.
patent: 4411033 (1983-10-01), Morgan
patent: 4425676 (1984-01-01), Crane
patent: 4588229 (1986-05-01), Jay
patent: 4660238 (1987-04-01), Jay
patent: 4726024 (1988-02-01), Jay
patent: 4726624 (1988-02-01), Jay
patent: 4728551 (1988-03-01), Jay
patent: 4744601 (1908-05-01), Nakanishi
patent: 4761843 (1988-08-01), Jay
patent: 4788730 (1988-12-01), Bexton
patent: 4842330 (1989-06-01), Jay
patent: 5123985 (1992-06-01), Evans et al.
Michaels Gregory A.
Polacsek David D.
Invacare Corporation
Jr. Milton Nelson
LandOfFree
Seat cushion for wheelchairs does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Seat cushion for wheelchairs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Seat cushion for wheelchairs will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1222364