Patent US4717538A successfully refreshed from Google Patents.
Patent US4194255A successfully refreshed from Google Patents.
US4194255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam spring
Assignee: Individual
•
Filing: 1978-10-06
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Granted: 1980-03-25
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Expires: 1998-10-06
Abstract
Abstract Elastic springy element, characterized by the fact that it consists of a mainly tubular body, made of synthetic foam material or the like, whereby the wall of the body displays a number of hollows, in staggered symmetry the cross-sectional surface of which varies from practically zero at the inner wall of the body, to a maximum value at the outer wall, for an unloaded body.
Inventors
- 👤 Willy Poppe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:01
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/04; A47C27/06; A47C27/065; A47C27/14; A47C27/142; A47C27/144; A47C27/20; A47G; A47G9/00; A47G9/10; F; F16; F16F; F16F1/00; F16F1/36; F16F1/37; F16F1/373; F16F1/377; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1376; Y10T428/24; Y10T428/24149; Y10T428/24174; Y10T428/24182; Y10T428/24273; Y10T428/24298; Y10T428/24314
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
60 words
Elastic spring element, comprising a tubular body of synthetic foam material or the like, the wall of the body having a plurality of hollows arranged in staggered symmetry through its tubular wall, the cross-sectional width of which varies from practically zero at the inner surface of the body to a maximum value at the outer surface, no load being applied.
Claim 2
Dependent Claim
60 words
Elastic spring element, comprising a tubular body of synthetic foam material or the like, the wall of the body having a plurality of hollows arranged in staggered symmetry through its tubular wall, the cross-sectional width of which varies from practically zero at the inner surface of the body to a maximum value at the outer surface, no load being applied.
Claim 3
Dependent Claim
42 words
Elastic springy element according to claim 1, characterized by the fact that the cross-section of each hollow at the outer wall is mainly diamond-shaped, whereby the large dimension of each afore-mentioned diamond-shaped hollow is directed along the circumscribing generatrix said outer wall.
Claim 4
Dependent Claim
26 words
Elastic springy element according to claim 1, characterized by the fact that the wall of aforesaid body is provided with said hollows over its entire surface.
Claim 5
Dependent Claim
32 words
Elastic springy element according to claim 1, characterized by the fact that the wall of aforesaid tubular body is provided with said hollows over at least a limited part of its surface.
Claim 6
Dependent Claim
18 words
Elastic springy element according to claim 1, characterized by the fact that the synthetic foam material is polyurethane.
Claim 7
Dependent Claim
40 words
Elastic springy element according to claim 1, characterized by the fact that at least one core of elastic springy material is fitted in aforesaid tubular body, and that its diameter substantially corresponds to the internal diameter of the tubular body.
Claim 8
Dependent Claim
19 words
Elastic springy element according to claim 6, characterized by the fact that afore-mentioned core is made of polyurethane foam.
Claim 9
Dependent Claim
28 words
Elastic springy element according to claim 6, characterized by the fact the the density of afore-mentioned core is substantially the same as the density of aforesaid tubular body.
Claim 10
Dependent Claim
24 words
Elastic springy element according to claim 6, characterized by the fact that the density of afore-mentioned core differs from that of aforesaid tubular body.
Claim 11
Dependent Claim
21 words
Elastic springy element according to claim 6, characterized by the fact that aforesaid core is provided with a series of hollows.
Claim 12
Dependent Claim
27 words
Elastic springy element according to claim 6, characterized by the fact that the length of aforesaid core is substantially equal to the length of afore-mentioned tubular body.
Claim 13
Dependent Claim
57 words
Elastic springy element according to claim 6, characterized by the fact that there are provided inside afore-mentioned tubular body two or more cores of elastic springy material, whereby the length of each of the cores is markedly smaller than the length of aforesaid tubular body and whereby free spaces are possibly left open between aforesaid smaller cores.
Claim 14
Dependent Claim
21 words
Elastic springy element according to claim 6, characterized by the fact that afore-mentioned smaller cores are made of some different material.
Claim 15
Dependent Claim
57 words
Lying, sitting or support element, characterized by the fact that it is made up of a number of elastic springy elements according to any one claims 1 to 13, and of which the end surfaces are mutually joined together by means of appropriate support layers to which afore-mentioned elements are individually secured at both of their ends.
References Cited (Backward Citations)
US1296359A
Cited
US2539058A
Cited
FR1185822A
Cited
US3401411A
Cited
US4020511A
Cited
US4070719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-25 | 1983-09-24 | 1984-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-25 | 1987-09-24 | 1988-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-25 | 1991-09-24 | 1992-03-25 | $7700.00 | Window Closed / Lapsed |