US4825868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Far infrared ray radiating mattress
Assignee: Tensho Electric Industries Co Ltd
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Filing: 1987-06-22
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Granted: 1989-05-02
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Expires: 2007-06-22
Abstract
Abstract A far infrared ray radiating mattress has a three layer structure including a lower layer of plate-like resilient and foamed synthetic resin, a middle layer of foamed synthetic resin corrugated in a longitudinal direction and having a plurality of protrusions provided on the upper surface thereof; a sheet-like far infrared ray radiating heater is provided on the three layer structure; and a cover is provided so that the three layer structure and the sheet-like heater are surrounded thereby.
Inventors
- 👤 Michitaro Susa
- 👤 Tadao Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:59
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/06; A61N2005/0658; A61N2005/0659; A61N2005/066; Y; Y10; Y10S; Y10S273/00; Y10S273/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
139 words
A far infrared ray radiation mattress comprising: a three layer structure including a lower layer of plate-like resilient and foamed synthetic resin, a middle layer of foamed synthetic resin corrugated in the direction of the length of the mattres and having corrugations extending transversely thereof and resistant to a compression load, and an upper layer of foamed synthetic resin conforming to the corrugations of said middle layer and having a plurality of protrusions provided on the upper surface thereof; a cover around said three layer structure and leaving spaces between the under surface of said cover and the recesses between corrugations in said upper layer; and a plurality of far infrared ray radiation sheet-like heater elements disposed on the under side of said cover over said upper layer at at least some of said recesses and facing said recesses.
Claim 2
Dependent Claim
139 words
A far infrared ray radiation mattress comprising: a three layer structure including a lower layer of plate-like resilient and foamed synthetic resin, a middle layer of foamed synthetic resin corrugated in the direction of the length of the mattres and having corrugations extending transversely thereof and resistant to a compression load, and an upper layer of foamed synthetic resin conforming to the corrugations of said middle layer and having a plurality of protrusions provided on the upper surface thereof; a cover around said three layer structure and leaving spaces between the under surface of said cover and the recesses between corrugations in said upper layer; and a plurality of far infrared ray radiation sheet-like heater elements disposed on the under side of said cover over said upper layer at at least some of said recesses and facing said recesses.
Claim 3
Dependent Claim
26 words
A far infrared ray radiation mattress as claimed in claim 1, wherein said sheet-like heater elements are a plurality of strips extending parallel to said recesses.
Claim 4
Dependent Claim
44 words
A far infrared ray radiating mattress as claimed in claim 1 wherein said sheet-like heater elements comprise a plurality of elongated strips disposed extending parallel to said some of said recesses and a plurality of short strips disposed opposed to others of said recesses.
Claim 5
Dependent Claim
30 words
a far infrared ray radiating mattress as claimed in claim 3 wherein said elements are at areas on said mattress on which important regions of a sleeper will usually rest.
Claim 6
Dependent Claim
20 words
A far infrared ray radiating mattress as claimed in claim 1, wherein said cover is a flexible and ventilative material.
Claim 7
Dependent Claim
43 words
A far infrared ray radiating mattress as claimed in claim 1, wherein said sheet-like heater elements are each formed of material which is a combination of fine carbon particles and a high polymer material so as to be self-adjusting with respect to temperature.
Claim 8
Dependent Claim
37 words
A far infrared ray radiating mattress as claimed in claim 1, wherein said sheet-like heater elements are each constituted by a far infrared ray radiating member and an electric resistance heating member against the upper surface thereof.
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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) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |