US4357725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Body-support devices
Assignee: Wilh Becker AB
•
Filing: 1979-12-28
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Granted: 1982-11-09
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Expires: 1999-12-28
Abstract
Abstract A body-support device for use as a mattress or cushion for hospital beds comprises an inner core (10) of soft, resilient plastics material having predominantly open cells, said core having two mutually opposite major surfaces (10a,10b) connected together by side surfaces (10c). Each major surface (10a,10b) is covered with a thin layer (11,12) of soft, resilient plastics material having predominantly closed cells, said thin layers (11,12) also covering at least two side surfaces of said inner core. The surfaces of the thin layers (11,12) remote from the core (10) are covered with a plastics foil (14,15). The uncovered side surfaces of the inner core serve to enable air to pass into and out of the inner core. The plastics foil provides the body-support device with a surface which can readily be kept clean. The thin layers (11,12) afford a better and stronger bonding of the plastics foil to the body-support device.
Inventors
- 👤 Lars G. W. Ahlm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:38
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/14; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/249921; Y10T428/249953; Y10T428/249976; Y10T428/249981
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
134 words
A bed mattress or cushion, comprising a relatively thick core made of a soft, resilient plastics material with predominantly open cells and having a substantially parallelepipedic shape with two, substantially rectangular, mutually opposite major surfaces and two longside surfaces and two shortside surfaces extending between said major surfaces, said major surfaces and said longside surfaces of said core being covered with a relatively thin layer of a soft, resilient plastics material with predominantly closed cells bonded to said major surfaces and said longside surfaces of said core, said relatively thin layer of a soft, resilient plastics material being covered with a thin, substantially impermeable, plastics foil bonded to said thin layer of a soft, resilient plastics material with predominantly closed cells, and said shortside surfaces of said core being exposed to the ambient air.
Claim 2
Dependent Claim
134 words
A bed mattress or cushion, comprising a relatively thick core made of a soft, resilient plastics material with predominantly open cells and having a substantially parallelepipedic shape with two, substantially rectangular, mutually opposite major surfaces and two longside surfaces and two shortside surfaces extending between said major surfaces, said major surfaces and said longside surfaces of said core being covered with a relatively thin layer of a soft, resilient plastics material with predominantly closed cells bonded to said major surfaces and said longside surfaces of said core, said relatively thin layer of a soft, resilient plastics material being covered with a thin, substantially impermeable, plastics foil bonded to said thin layer of a soft, resilient plastics material with predominantly closed cells, and said shortside surfaces of said core being exposed to the ambient air.
Claim 3
Dependent Claim
171 words
A bed mattress or cushion as claimed in claim 1, wherein said relatively thin layer of a soft, resilient plastics material with predominantly closed cells and the thin plastics foil bonded thereto are made up of a first section of a relatively thin layer of soft, resilient plastics material with predominantly closed cells and a thin plastics foil bonded thereto extending uninterrupted over one major surface and substantially one adjacent half part of the two longside surfaces of said core, and a second section of a relatively thin layer of a soft, resilient plastics material with predominantly closed cells and a thin plastics foil bonded thereto extending uninterrupted over the opposite major surface and the remaining half parts of the two longside surfaces of the core, the edges of said first and second sections of the thin layer of soft, resilient plastics material with predominantly closed cells and thin plastics foil bonded thereto being joined to each other substantially along the longitudinal center lines of the longside surfaces of the core.
Claim 4
Dependent Claim
29 words
A bed mattress or cushion as claimed in claim 1, wherein said plastics foil is flame-laminated on said thin layer of soft, resilient plastics material with predominantly closed cells.
Claim 5
Dependent Claim
33 words
A bed mattress or cushion as claimed in claim 1, wherein said thin layer of a soft, resilient plastics material with predominantly closed cells is flame-laminated on the major surfaces of said core.
Claim 6
Dependent Claim
37 words
A bed mattress or cushion as claimed in claim 4, wherein said thin layer of a soft, resilient plastics material with predominantly closed cells is bonded to the longside surfaces of said core by electric low-frequency welding.
Claim 7
Dependent Claim
37 words
A bed mattress or cushion as claimed in claim 4, wherein said thin layer of soft, resilient plastics material with predominantly closed cells is bonded to said longside surfaces of said core by means of an adhesive.
Claim 8
Dependent Claim
16 words
A bed mattress or cushion as claimed in claim 1, wherein said core comprises foamed polyether.
Claim 9
Dependent Claim
22 words
A bed mattress or cushion as claimed in claim 1, wherein said thin layer of soft, resilient plastics material comprises foamed polyester.
Claim 10
Dependent Claim
18 words
A bed mattress or cushion as claimed in claim 1, wherein said thin plastics foil comprises polyurethane film.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |