US4574101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exercise mat
Assignee: Packaging Industries Group Inc
•
Filing: 1983-09-02
•
Granted: 1986-03-04
•
Expires: 2003-09-02
Abstract
Abstract An exercise mat consisting of laminated outer and core layers of closed-cell plastic foam having different selected densities. A relatively thick central layer is so configured that air chambers are formed bounded by it and one or both of the outer layers. These chambers may be constituted of air cylinders passing vertically through the central layer or of horizontal slots formed on a surface or surfaces of the central layer. The air chambers can be of any suitable predetermined size and spacing. The mat may be configured to permit folding by maintaining one of the outer layers continuous to form a hinge at a point or points where the core layer and other outer layers are discontinuous.
Inventors
- 👤 Raymond A. Tricca
- 👤 John K. Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:09
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/266; A; A63; A63C; A63C19/00; A63C19/04; A63B; A63B21/00; A63B21/40; A63B21/4027; A63B21/4037; B32B5/00; B32B5/18; B32B5/22; B32B5/32; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; B32B2266/08; B32B2307/00; B32B2307/50; B32B2307/56; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/234; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24942; Y10T428/24992; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249987; Y10T428/249988
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
75 words
An exercise mat comprising a central, relatively thick core layer of closed-cell foam , said core layer having a plurality of air chambers therein, and two relatively thin outer skin layers of closed-cell foam , the density of said core layer being less than the density of each of said outer skin layers, each of said thin outer skin layers being laminated in sealed relationship to a respective outer surface of said thick core layer.
Claim 2
Dependent Claim
75 words
An exercise mat comprising a central, relatively thick core layer of closed-cell foam , said core layer having a plurality of air chambers therein, and two relatively thin outer skin layers of closed-cell foam , the density of said core layer being less than the density of each of said outer skin layers, each of said thin outer skin layers being laminated in sealed relationship to a respective outer surface of said thick core layer.
Claim 3
Dependent Claim
22 words
An exercise mat as defined in claim 1 wherein said air chambers are vertically disposed, cylindrical in shape, and contain trapped air.
Claim 4
Dependent Claim
27 words
An exercise mat as defined in claim 2 wherein said core layer is approximately four times as thick as the combined thicknesses of said two outer layers.
Claim 5
Dependent Claim
36 words
An exercise mat as defined in claim 1 having matching openings formed adjacent the ends thereof to serve as carrying handles, said mat being foldable to align said two openings whereby said mat may be hand-carried.
Claim 6
Dependent Claim
26 words
An exercise mat as defined in claim 1 wherein said air chambers comprise horizontally arranged slots formed in at least one surface of said core layer.
Claim 7
Dependent Claim
23 words
An exercise mat as defined in claim 1 wherein said air chambers comprise horizontal slots formed in both surfaces of said core layer.
Claim 8
Dependent Claim
36 words
An exercise mat as defined in claim 4 wherein said core layer and one of said outer layers are interrupted, the other of said outer layers being continuous and flexible to permit folding of said mat.
Claim 9
Dependent Claim
26 words
An exercise mat as defined in claim 1 wherein the density of each of said outer layers is approximately twice the density of said core layer.
Claim 10
Dependent Claim
36 words
An exercise mat as defined in claim 8 wherein the density of each of said outer layers is 5.0 pounds per cubic foot and the density of said core layer is 2.5 pounds per cubic foot.
Claim 11
Dependent Claim
15 words
An exercise mat as defined in claim 1 wherein said closed-cell foam is polyethylene foam.
Claim 12
Dependent Claim
18 words
An exercise mat as defined in claim 1 wherein said core layer comprises an integral layer of foam.
Claim 13
Dependent Claim
17 words
An exercise mat as defined in claim 1 wherein said core layer comprises a plurality of layers.
Claim 14
Dependent Claim
18 words
An exercise mat as defined in claim 1 wherein said air chambers are arranged in a symmetrical pattern.
Claim 15
Dependent Claim
18 words
An exercise mat as defined in claim 2 wherein said air chambers are arranged in a symmetrical pattern.
References Cited (Backward Citations)
US3016317A
Cited
US3818522A
Cited
US4147828A
Cited
US4137583A
Cited
US4263727A
Cited
US4357725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-03 | 1989-09-02 | 1990-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-03 | 1993-09-02 | 1994-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-03 | 1997-09-02 | 1998-03-04 | $7700.00 | Window Closed / Lapsed |